text: /**
   * cgltf - a single-file glTF 2.0 parser written in C99.
   *
   * Version: 1.8
   *
   * Website: https://github.com/jkuhlmann/cgltf
   *
   * Distributed under the MIT License, see notice at the end of this file.
   *
   * Building:
   * Include this file where you need the struct and function
   * declarations. Have exactly one source file where you define
   * `CGLTF_IMPLEMENTATION` before including this file to get the
   * function definitions.
   *
   * Reference:
   * `cgltf_result cgltf_parse(const cgltf_options*, const void*,
   * cgltf_size, cgltf_data**)` parses both glTF and GLB data. If
   * this function returns `cgltf_result_success`, you have to call
   * `cgltf_free()` on the created `cgltf_data*` variable.
   * Note that contents of external files for buffers and images are not
   * automatically loaded. You'll need to read these files yourself using
   * URIs in the `cgltf_data` structure.
   *
   * `cgltf_options` is the struct passed to `cgltf_parse()` to control
   * parts of the parsing process. You can use it to force the file type
   * and provide memory allocation as well as file operation callbacks. 
   * Should be zero-initialized to trigger default behavior.
   *
   * `cgltf_data` is the struct allocated and filled by `cgltf_parse()`.
   * It generally mirrors the glTF format as described by the spec (see
   * https://github.com/KhronosGroup/glTF/tree/master/specification/2.0).
   *
   * `void cgltf_free(cgltf_data*)` frees the allocated `cgltf_data`
   * variable.
   *
   * `cgltf_result cgltf_load_buffers(const cgltf_options*, cgltf_data*,
   * const char* gltf_path)` can be optionally called to open and read buffer
   * files using the `FILE*` APIs. The `gltf_path` argument is the path to
   * the original glTF file, which allows the parser to resolve the path to
   * buffer files.
   *
   * `cgltf_result cgltf_load_buffer_base64(const cgltf_options* options,
   * cgltf_size size, const char* base64, void** out_data)` decodes
   * base64-encoded data content. Used internally by `cgltf_load_buffers()`
   * and may be useful if you're not dealing with normal files.
   *
   * `cgltf_result cgltf_parse_file(const cgltf_options* options, const
   * char* path, cgltf_data** out_data)` can be used to open the given
   * file using `FILE*` APIs and parse the data using `cgltf_parse()`.
   *
   * `cgltf_result cgltf_validate(cgltf_data*)` can be used to do additional
   * checks to make sure the parsed glTF data is valid.
   *
   * `cgltf_node_transform_local` converts the translation / rotation / scale properties of a node
   * into a mat4.
   *
   * `cgltf_node_transform_world` calls `cgltf_node_transform_local` on every ancestor in order
   * to compute the root-to-node transformation.
   *
   * `cgltf_accessor_unpack_floats` reads in the data from an accessor, applies sparse data (if any),
   * and converts them to floating point. Assumes that `cgltf_load_buffers` has already been called.
   * By passing null for the output pointer, users can find out how many floats are required in the
   * output buffer.
   *
   * `cgltf_accessor_num_components` is a tiny utility that tells you the dimensionality of
   * a certain accessor type. This can be used before `cgltf_accessor_unpack_floats` to help allocate
   * the necessary amount of memory.
   *
   * `cgltf_accessor_read_float` reads a certain element from a non-sparse accessor and converts it to
   * floating point, assuming that `cgltf_load_buffers` has already been called. The passed-in element
   * size is the number of floats in the output buffer, which should be in the range [1, 16]. Returns
   * false if the passed-in element_size is too small, or if the accessor is sparse.
   *
   * `cgltf_accessor_read_uint` is similar to its floating-point counterpart, but limited to reading
   * vector types and does not support matrix types. The passed-in element size is the number of uints
   * in the output buffer, which should be in the range [1, 4]. Returns false if the passed-in 
   * element_size is too small, or if the accessor is sparse.
   *
   * `cgltf_accessor_read_index` is similar to its floating-point counterpart, but it returns size_t
   * and only works with single-component data types.
   *
   * `cgltf_result cgltf_copy_extras_json(const cgltf_data*, const cgltf_extras*,
   * char* dest, cgltf_size* dest_size)` allows users to retrieve the "extras" data that
   * can be attached to many glTF objects (which can be arbitrary JSON data). The
   * `cgltf_extras` struct stores the offsets of the start and end of the extras JSON data
   * as it appears in the complete glTF JSON data. This function copies the extras data
   * into the provided buffer. If `dest` is NULL, the length of the data is written into
   * `dest_size`. You can then parse this data using your own JSON parser
   * or, if you've included the cgltf implementation using the integrated JSMN JSON parser.
   */
  #ifndef CGLTF_H_INCLUDED__
  #define CGLTF_H_INCLUDED__
  
  #include <stddef.h>
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  typedef size_t cgltf_size;
  typedef float cgltf_float;
  typedef int cgltf_int;
  typedef unsigned int cgltf_uint;
  typedef int cgltf_bool;
  
  typedef enum cgltf_file_type
  {
  	cgltf_file_type_invalid,
  	cgltf_file_type_gltf,
  	cgltf_file_type_glb,
  } cgltf_file_type;
  
  typedef enum cgltf_result
  {
  	cgltf_result_success,
  	cgltf_result_data_too_short,
  	cgltf_result_unknown_format,
  	cgltf_result_invalid_json,
  	cgltf_result_invalid_gltf,
  	cgltf_result_invalid_options,
  	cgltf_result_file_not_found,
  	cgltf_result_io_error,
  	cgltf_result_out_of_memory,
  	cgltf_result_legacy_gltf,
  } cgltf_result;
  
  typedef struct cgltf_memory_options
  {
  	void* (*alloc)(void* user, cgltf_size size);
  	void (*free) (void* user, void* ptr);
  	void* user_data;
  } cgltf_memory_options;
  
  typedef struct cgltf_file_options
  {
  	cgltf_result(*read)(const struct cgltf_memory_options* memory_options, const struct cgltf_file_options* file_options, const char* path, cgltf_size* size, void** data);
  	void (*release)(const struct cgltf_memory_options* memory_options, const struct cgltf_file_options* file_options, void* data);
  	void* user_data;
  } cgltf_file_options;
  
  typedef struct cgltf_options
  {
  	cgltf_file_type type; /* invalid == auto detect */
  	cgltf_size json_token_count; /* 0 == auto */
  	cgltf_memory_options memory;
  	cgltf_file_options file;
  } cgltf_options;
  
  typedef enum cgltf_buffer_view_type
  {
  	cgltf_buffer_view_type_invalid,
  	cgltf_buffer_view_type_indices,
  	cgltf_buffer_view_type_vertices,
  } cgltf_buffer_view_type;
  
  typedef enum cgltf_attribute_type
  {
  	cgltf_attribute_type_invalid,
  	cgltf_attribute_type_position,
  	cgltf_attribute_type_normal,
  	cgltf_attribute_type_tangent,
  	cgltf_attribute_type_texcoord,
  	cgltf_attribute_type_color,
  	cgltf_attribute_type_joints,
  	cgltf_attribute_type_weights,
  } cgltf_attribute_type;
  
  typedef enum cgltf_component_type
  {
  	cgltf_component_type_invalid,
  	cgltf_component_type_r_8, /* BYTE */
  	cgltf_component_type_r_8u, /* UNSIGNED_BYTE */
  	cgltf_component_type_r_16, /* SHORT */
  	cgltf_component_type_r_16u, /* UNSIGNED_SHORT */
  	cgltf_component_type_r_32u, /* UNSIGNED_INT */
  	cgltf_component_type_r_32f, /* FLOAT */
  } cgltf_component_type;
  
  typedef enum cgltf_type
  {
  	cgltf_type_invalid,
  	cgltf_type_scalar,
  	cgltf_type_vec2,
  	cgltf_type_vec3,
  	cgltf_type_vec4,
  	cgltf_type_mat2,
  	cgltf_type_mat3,
  	cgltf_type_mat4,
  } cgltf_type;
  
  typedef enum cgltf_primitive_type
  {
  	cgltf_primitive_type_points,
  	cgltf_primitive_type_lines,
  	cgltf_primitive_type_line_loop,
  	cgltf_primitive_type_line_strip,
  	cgltf_primitive_type_triangles,
  	cgltf_primitive_type_triangle_strip,
  	cgltf_primitive_type_triangle_fan,
  } cgltf_primitive_type;
  
  typedef enum cgltf_alpha_mode
  {
  	cgltf_alpha_mode_opaque,
  	cgltf_alpha_mode_mask,
  	cgltf_alpha_mode_blend,
  } cgltf_alpha_mode;
  
  typedef enum cgltf_animation_path_type {
  	cgltf_animation_path_type_invalid,
  	cgltf_animation_path_type_translation,
  	cgltf_animation_path_type_rotation,
  	cgltf_animation_path_type_scale,
  	cgltf_animation_path_type_weights,
  } cgltf_animation_path_type;
  
  typedef enum cgltf_interpolation_type {
  	cgltf_interpolation_type_linear,
  	cgltf_interpolation_type_step,
  	cgltf_interpolation_type_cubic_spline,
  } cgltf_interpolation_type;
  
  typedef enum cgltf_camera_type {
  	cgltf_camera_type_invalid,
  	cgltf_camera_type_perspective,
  	cgltf_camera_type_orthographic,
  } cgltf_camera_type;
  
  typedef enum cgltf_light_type {
  	cgltf_light_type_invalid,
  	cgltf_light_type_directional,
  	cgltf_light_type_point,
  	cgltf_light_type_spot,
  } cgltf_light_type;
  
  typedef struct cgltf_extras {
  	cgltf_size start_offset;
  	cgltf_size end_offset;
  } cgltf_extras;
  
  typedef struct cgltf_extension {
  	char* name;
  	char* data;
  } cgltf_extension;
  
  typedef struct cgltf_buffer
  {
  	cgltf_size size;
  	char* uri;
  	void* data; /* loaded by cgltf_load_buffers */
  	cgltf_extras extras;
  	cgltf_size extensions_count;
  	cgltf_extension* extensions;
  } cgltf_buffer;
  
  typedef struct cgltf_buffer_view
  {
  	cgltf_buffer* buffer;
  	cgltf_size offset;
  	cgltf_size size;
  	cgltf_size stride; /* 0 == automatically determined by accessor */
  	cgltf_buffer_view_type type;
  	cgltf_extras extras;
  	cgltf_size extensions_count;
  	cgltf_extension* extensions;
  } cgltf_buffer_view;
  
  typedef struct cgltf_accessor_sparse
  {
  	cgltf_size count;
  	cgltf_buffer_view* indices_buffer_view;
  	cgltf_size indices_byte_offset;
  	cgltf_component_type indices_component_type;
  	cgltf_buffer_view* values_buffer_view;
  	cgltf_size values_byte_offset;
  	cgltf_extras extras;
  	cgltf_extras indices_extras;
  	cgltf_extras values_extras;
  	cgltf_size extensions_count;
  	cgltf_extension* extensions;
  	cgltf_size indices_extensions_count;
  	cgltf_extension* indices_extensions;
  	cgltf_size values_extensions_count;
  	cgltf_extension* values_extensions;
  } cgltf_accessor_sparse;
  
  typedef struct cgltf_accessor
  {
  	cgltf_component_type component_type;
  	cgltf_bool normalized;
  	cgltf_type type;
  	cgltf_size offset;
  	cgltf_size count;
  	cgltf_size stride;
  	cgltf_buffer_view* buffer_view;
  	cgltf_bool has_min;
  	cgltf_float min[16];
  	cgltf_bool has_max;
  	cgltf_float max[16];
  	cgltf_bool is_sparse;
  	cgltf_accessor_sparse sparse;
  	cgltf_extras extras;
  	cgltf_size extensions_count;
  	cgltf_extension* extensions;
  } cgltf_accessor;
  
  typedef struct cgltf_attribute
  {
  	char* name;
  	cgltf_attribute_type type;
  	cgltf_int index;
  	cgltf_accessor* data;
  } cgltf_attribute;
  
  typedef struct cgltf_image
  {
  	char* name;
  	char* uri;
  	cgltf_buffer_view* buffer_view;
  	char* mime_type;
  	cgltf_extras extras;
  	cgltf_size extensions_count;
  	cgltf_extension* extensions;
  } cgltf_image;
  
  typedef struct cgltf_sampler
  {
  	cgltf_int mag_filter;
  	cgltf_int min_filter;
  	cgltf_int wrap_s;
  	cgltf_int wrap_t;
  	cgltf_extras extras;
  	cgltf_size extensions_count;
  	cgltf_extension* extensions;
  } cgltf_sampler;
  
  typedef struct cgltf_texture
  {
  	char* name;
  	cgltf_image* image;
  	cgltf_sampler* sampler;
  	cgltf_extras extras;
  	cgltf_size extensions_count;
  	cgltf_extension* extensions;
  } cgltf_texture;
  
  typedef struct cgltf_texture_transform
  {
  	cgltf_float offset[2];
  	cgltf_float rotation;
  	cgltf_float scale[2];
  	cgltf_int texcoord;
  } cgltf_texture_transform;
  
  typedef struct cgltf_texture_view
  {
  	cgltf_texture* texture;
  	cgltf_int texcoord;
  	cgltf_float scale; /* equivalent to strength for occlusion_texture */
  	cgltf_bool has_transform;
  	cgltf_texture_transform transform;
  	cgltf_extras extras;
  	cgltf_size extensions_count;
  	cgltf_extension* extensions;
  } cgltf_texture_view;
  
  typedef struct cgltf_pbr_metallic_roughness
  {
  	cgltf_texture_view base_color_texture;
  	cgltf_texture_view metallic_roughness_texture;
  
  	cgltf_float base_color_factor[4];
  	cgltf_float metallic_factor;
  	cgltf_float roughness_factor;
  
  	cgltf_extras extras;
  } cgltf_pbr_metallic_roughness;
  
  typedef struct cgltf_pbr_specular_glossiness
  {
  	cgltf_texture_view diffuse_texture;
  	cgltf_texture_view specular_glossiness_texture;
  
  	cgltf_float diffuse_factor[4];
  	cgltf_float specular_factor[3];
  	cgltf_float glossiness_factor;
  } cgltf_pbr_specular_glossiness;
  
  typedef struct cgltf_clearcoat
  {
  	cgltf_texture_view clearcoat_texture;
  	cgltf_texture_view clearcoat_roughness_texture;
  	cgltf_texture_view clearcoat_normal_texture;
  
  	cgltf_float clearcoat_factor;
  	cgltf_float clearcoat_roughness_factor;
  } cgltf_clearcoat;
  
  typedef struct cgltf_transmission
  {
  	cgltf_texture_view transmission_texture;
  	cgltf_float transmission_factor;
  } cgltf_transmission;
  
  typedef struct cgltf_ior
  {
  	cgltf_float ior;
  } cgltf_ior;
  
  typedef struct cgltf_specular
  {
  	cgltf_texture_view specular_texture;
  	cgltf_float specular_color_factor[3];
  	cgltf_float specular_factor;
  } cgltf_specular;
  
  typedef struct cgltf_material
  {
  	char* name;
  	cgltf_bool has_pbr_metallic_roughness;
  	cgltf_bool has_pbr_specular_glossiness;
  	cgltf_bool has_clearcoat;
  	cgltf_bool has_transmission;
  	cgltf_bool has_ior;
  	cgltf_bool has_specular;
  	cgltf_pbr_metallic_roughness pbr_metallic_roughness;
  	cgltf_pbr_specular_glossiness pbr_specular_glossiness;
  	cgltf_clearcoat clearcoat;
  	cgltf_ior ior;
  	cgltf_specular specular;
  	cgltf_transmission transmission;
  	cgltf_texture_view normal_texture;
  	cgltf_texture_view occlusion_texture;
  	cgltf_texture_view emissive_texture;
  	cgltf_float emissive_factor[3];
  	cgltf_alpha_mode alpha_mode;
  	cgltf_float alpha_cutoff;
  	cgltf_bool double_sided;
  	cgltf_bool unlit;
  	cgltf_extras extras;
  	cgltf_size extensions_count;
  	cgltf_extension* extensions;
  } cgltf_material;
  
  typedef struct cgltf_morph_target {
  	cgltf_attribute* attributes;
  	cgltf_size attributes_count;
  } cgltf_morph_target;
  
  typedef struct cgltf_draco_mesh_compression {
  	cgltf_buffer_view* buffer_view;
  	cgltf_attribute* attributes;
  	cgltf_size attributes_count;
  } cgltf_draco_mesh_compression;
  
  typedef struct cgltf_primitive {
  	cgltf_primitive_type type;
  	cgltf_accessor* indices;
  	cgltf_material* material;
  	cgltf_attribute* attributes;
  	cgltf_size attributes_count;
  	cgltf_morph_target* targets;
  	cgltf_size targets_count;
  	cgltf_extras extras;
  	cgltf_bool has_draco_mesh_compression;
  	cgltf_draco_mesh_compression draco_mesh_compression;
  	cgltf_size extensions_count;
  	cgltf_extension* extensions;
  } cgltf_primitive;
  
  typedef struct cgltf_mesh {
  	char* name;
  	cgltf_primitive* primitives;
  	cgltf_size primitives_count;
  	cgltf_float* weights;
  	cgltf_size weights_count;
  	char** target_names;
  	cgltf_size target_names_count;
  	cgltf_extras extras;
  	cgltf_size extensions_count;
  	cgltf_extension* extensions;
  } cgltf_mesh;
  
  typedef struct cgltf_node cgltf_node;
  
  typedef struct cgltf_skin {
  	char* name;
  	cgltf_node** joints;
  	cgltf_size joints_count;
  	cgltf_node* skeleton;
  	cgltf_accessor* inverse_bind_matrices;
  	cgltf_extras extras;
  	cgltf_size extensions_count;
  	cgltf_extension* extensions;
  } cgltf_skin;
  
  typedef struct cgltf_camera_perspective {
  	cgltf_float aspect_ratio;
  	cgltf_float yfov;
  	cgltf_float zfar;
  	cgltf_float znear;
  	cgltf_extras extras;
  } cgltf_camera_perspective;
  
  typedef struct cgltf_camera_orthographic {
  	cgltf_float xmag;
  	cgltf_float ymag;
  	cgltf_float zfar;
  	cgltf_float znear;
  	cgltf_extras extras;
  } cgltf_camera_orthographic;
  
  typedef struct cgltf_camera {
  	char* name;
  	cgltf_camera_type type;
  	union {
  		cgltf_camera_perspective perspective;
  		cgltf_camera_orthographic orthographic;
  	} data;
  	cgltf_extras extras;
  	cgltf_size extensions_count;
  	cgltf_extension* extensions;
  } cgltf_camera;
  
  typedef struct cgltf_light {
  	char* name;
  	cgltf_float color[3];
  	cgltf_float intensity;
  	cgltf_light_type type;
  	cgltf_float range;
  	cgltf_float spot_inner_cone_angle;
  	cgltf_float spot_outer_cone_angle;
  } cgltf_light;
  
  struct cgltf_node {
  	char* name;
  	cgltf_node* parent;
  	cgltf_node** children;
  	cgltf_size children_count;
  	cgltf_skin* skin;
  	cgltf_mesh* mesh;
  	cgltf_camera* camera;
  	cgltf_light* light;
  	cgltf_float* weights;
  	cgltf_size weights_count;
  	cgltf_bool has_translation;
  	cgltf_bool has_rotation;
  	cgltf_bool has_scale;
  	cgltf_bool has_matrix;
  	cgltf_float translation[3];
  	cgltf_float rotation[4];
  	cgltf_float scale[3];
  	cgltf_float matrix[16];
  	cgltf_extras extras;
  	cgltf_size extensions_count;
  	cgltf_extension* extensions;
  };
  
  typedef struct cgltf_scene {
  	char* name;
  	cgltf_node** nodes;
  	cgltf_size nodes_count;
  	cgltf_extras extras;
  	cgltf_size extensions_count;
  	cgltf_extension* extensions;
  } cgltf_scene;
  
  typedef struct cgltf_animation_sampler {
  	cgltf_accessor* input;
  	cgltf_accessor* output;
  	cgltf_interpolation_type interpolation;
  	cgltf_extras extras;
  	cgltf_size extensions_count;
  	cgltf_extension* extensions;
  } cgltf_animation_sampler;
  
  typedef struct cgltf_animation_channel {
  	cgltf_animation_sampler* sampler;
  	cgltf_node* target_node;
  	cgltf_animation_path_type target_path;
  	cgltf_extras extras;
  	cgltf_size extensions_count;
  	cgltf_extension* extensions;
  } cgltf_animation_channel;
  
  typedef struct cgltf_animation {
  	char* name;
  	cgltf_animation_sampler* samplers;
  	cgltf_size samplers_count;
  	cgltf_animation_channel* channels;
  	cgltf_size channels_count;
  	cgltf_extras extras;
  	cgltf_size extensions_count;
  	cgltf_extension* extensions;
  } cgltf_animation;
  
  typedef struct cgltf_asset {
  	char* copyright;
  	char* generator;
  	char* version;
  	char* min_version;
  	cgltf_extras extras;
  	cgltf_size extensions_count;
  	cgltf_extension* extensions;
  } cgltf_asset;
  
  typedef struct cgltf_data
  {
  	cgltf_file_type file_type;
  	void* file_data;
  
  	cgltf_asset asset;
  
  	cgltf_mesh* meshes;
  	cgltf_size meshes_count;
  
  	cgltf_material* materials;
  	cgltf_size materials_count;
  
  	cgltf_accessor* accessors;
  	cgltf_size accessors_count;
  
  	cgltf_buffer_view* buffer_views;
  	cgltf_size buffer_views_count;
  
  	cgltf_buffer* buffers;
  	cgltf_size buffers_count;
  
  	cgltf_image* images;
  	cgltf_size images_count;
  
  	cgltf_texture* textures;
  	cgltf_size textures_count;
  
  	cgltf_sampler* samplers;
  	cgltf_size samplers_count;
  
  	cgltf_skin* skins;
  	cgltf_size skins_count;
  
  	cgltf_camera* cameras;
  	cgltf_size cameras_count;
  
  	cgltf_light* lights;
  	cgltf_size lights_count;
  
  	cgltf_node* nodes;
  	cgltf_size nodes_count;
  
  	cgltf_scene* scenes;
  	cgltf_size scenes_count;
  
  	cgltf_scene* scene;
  
  	cgltf_animation* animations;
  	cgltf_size animations_count;
  
  	cgltf_extras extras;
  
  	cgltf_size data_extensions_count;
  	cgltf_extension* data_extensions;
  
  	char** extensions_used;
  	cgltf_size extensions_used_count;
  
  	char** extensions_required;
  	cgltf_size extensions_required_count;
  
  	const char* json;
  	cgltf_size json_size;
  
  	const void* bin;
  	cgltf_size bin_size;
  
  	cgltf_memory_options memory;
  	cgltf_file_options file;
  } cgltf_data;
  
  cgltf_result cgltf_parse(
  		const cgltf_options* options,
  		const void* data,
  		cgltf_size size,
  		cgltf_data** out_data);
  
  cgltf_result cgltf_parse_file(
  		const cgltf_options* options,
  		const char* path,
  		cgltf_data** out_data);
  
  cgltf_result cgltf_load_buffers(
  		const cgltf_options* options,
  		cgltf_data* data,
  		const char* gltf_path);
  
  cgltf_result cgltf_load_buffer_base64(const cgltf_options* options, cgltf_size size, const char* base64, void** out_data);
  
  void cgltf_decode_uri(char* uri);
  
  cgltf_result cgltf_validate(cgltf_data* data);
  
  void cgltf_free(cgltf_data* data);
  
  void cgltf_node_transform_local(const cgltf_node* node, cgltf_float* out_matrix);
  void cgltf_node_transform_world(const cgltf_node* node, cgltf_float* out_matrix);
  
  cgltf_bool cgltf_accessor_read_float(const cgltf_accessor* accessor, cgltf_size index, cgltf_float* out, cgltf_size element_size);
  cgltf_bool cgltf_accessor_read_uint(const cgltf_accessor* accessor, cgltf_size index, cgltf_uint* out, cgltf_size element_size);
  cgltf_size cgltf_accessor_read_index(const cgltf_accessor* accessor, cgltf_size index);
  
  cgltf_size cgltf_num_components(cgltf_type type);
  
  cgltf_size cgltf_accessor_unpack_floats(const cgltf_accessor* accessor, cgltf_float* out, cgltf_size float_count);
  
  cgltf_result cgltf_copy_extras_json(const cgltf_data* data, const cgltf_extras* extras, char* dest, cgltf_size* dest_size);
  
  #ifdef __cplusplus
  }
  #endif
  
  #endif /* #ifndef CGLTF_H_INCLUDED__ */
  
  /*
   *
   * Stop now, if you are only interested in the API.
   * Below, you find the implementation.
   *
   */
  
  #if defined(__INTELLISENSE__) || defined(__JETBRAINS_IDE__)
  /* This makes MSVC/CLion intellisense work. */
  #define CGLTF_IMPLEMENTATION
  #endif
  
  #ifdef CGLTF_IMPLEMENTATION
  
  #include <stdint.h> /* For uint8_t, uint32_t */
  #include <string.h> /* For strncpy */
  #include <stdio.h>  /* For fopen */
  #include <limits.h> /* For UINT_MAX etc */
  
  #if !defined(CGLTF_MALLOC) || !defined(CGLTF_FREE) || !defined(CGLTF_ATOI) || !defined(CGLTF_ATOF)
  #include <stdlib.h> /* For malloc, free, atoi, atof */
  #endif
  
  /* JSMN_PARENT_LINKS is necessary to make parsing large structures linear in input size */
  #define JSMN_PARENT_LINKS
  
  /* JSMN_STRICT is necessary to reject invalid JSON documents */
  #define JSMN_STRICT
  
  /*
   * -- jsmn.h start --
   * Source: https://github.com/zserge/jsmn
   * License: MIT
   */
  typedef enum {
  	JSMN_UNDEFINED = 0,
  	JSMN_OBJECT = 1,
  	JSMN_ARRAY = 2,
  	JSMN_STRING = 3,
  	JSMN_PRIMITIVE = 4
  } jsmntype_t;
  enum jsmnerr {
  	/* Not enough tokens were provided */
  	JSMN_ERROR_NOMEM = -1,
  	/* Invalid character inside JSON string */
  	JSMN_ERROR_INVAL = -2,
  	/* The string is not a full JSON packet, more bytes expected */
  	JSMN_ERROR_PART = -3
  };
  typedef struct {
  	jsmntype_t type;
  	int start;
  	int end;
  	int size;
  #ifdef JSMN_PARENT_LINKS
  	int parent;
  #endif
  } jsmntok_t;
  typedef struct {
  	unsigned int pos; /* offset in the JSON string */
  	unsigned int toknext; /* next token to allocate */
  	int toksuper; /* superior token node, e.g parent object or array */
  } jsmn_parser;
  static void jsmn_init(jsmn_parser *parser);
  static int jsmn_parse(jsmn_parser *parser, const char *js, size_t len, jsmntok_t *tokens, size_t num_tokens);
  /*
   * -- jsmn.h end --
   */
  
  
  static const cgltf_size GlbHeaderSize = 12;
  static const cgltf_size GlbChunkHeaderSize = 8;
  static const uint32_t GlbVersion = 2;
  static const uint32_t GlbMagic = 0x46546C67;
  static const uint32_t GlbMagicJsonChunk = 0x4E4F534A;
  static const uint32_t GlbMagicBinChunk = 0x004E4942;
  
  #ifndef CGLTF_MALLOC
  #define CGLTF_MALLOC(size) malloc(size)
  #endif
  #ifndef CGLTF_FREE
  #define CGLTF_FREE(ptr) free(ptr)
  #endif
  #ifndef CGLTF_ATOI
  #define CGLTF_ATOI(str) atoi(str)
  #endif
  #ifndef CGLTF_ATOF
  #define CGLTF_ATOF(str) atof(str)
  #endif
  
  static void* cgltf_default_alloc(void* user, cgltf_size size)
  {
  	(void)user;
  	return CGLTF_MALLOC(size);
  }
  
  static void cgltf_default_free(void* user, void* ptr)
  {
  	(void)user;
  	CGLTF_FREE(ptr);
  }
  
  static void* cgltf_calloc(cgltf_options* options, size_t element_size, cgltf_size count)
  {
  	if (SIZE_MAX / element_size < count)
  	{
  		return NULL;
  	}
  	void* result = options->memory.alloc(options->memory.user_data, element_size * count);
  	if (!result)
  	{
  		return NULL;
  	}
  	memset(result, 0, element_size * count);
  	return result;
  }
  
  static cgltf_result cgltf_default_file_read(const struct cgltf_memory_options* memory_options, const struct cgltf_file_options* file_options, const char* path, cgltf_size* size, void** data)
  {
  	(void)file_options;
  	void* (*memory_alloc)(void*, cgltf_size) = memory_options->alloc ? memory_options->alloc : &cgltf_default_alloc;
  	void (*memory_free)(void*, void*) = memory_options->free ? memory_options->free : &cgltf_default_free;
  
  	FILE* file = fopen(path, "rb");
  	if (!file)
  	{
  		return cgltf_result_file_not_found;
  	}
  
  	cgltf_size file_size = size ? *size : 0;
  
  	if (file_size == 0)
  	{
  		fseek(file, 0, SEEK_END);
  
  		long length = ftell(file);
  		if (length < 0)
  		{
  			fclose(file);
  			return cgltf_result_io_error;
  		}
  
  		fseek(file, 0, SEEK_SET);
  		file_size = (cgltf_size)length;
  	}
  
  	char* file_data = (char*)memory_alloc(memory_options->user_data, file_size);
  	if (!file_data)
  	{
  		fclose(file);
  		return cgltf_result_out_of_memory;
  	}
  	
  	cgltf_size read_size = fread(file_data, 1, file_size, file);
  
  	fclose(file);
  
  	if (read_size != file_size)
  	{
  		memory_free(memory_options->user_data, file_data);
  		return cgltf_result_io_error;
  	}
  
  	if (size)
  	{
  		*size = file_size;
  	}
  	if (data)
  	{
  		*data = file_data;
  	}
  
  	return cgltf_result_success;
  }
  
  static void cgltf_default_file_release(const struct cgltf_memory_options* memory_options, const struct cgltf_file_options* file_options, void* data)
  {
  	(void)file_options;
  	void (*memfree)(void*, void*) = memory_options->free ? memory_options->free : &cgltf_default_free;
  	memfree(memory_options->user_data, data);
  }
  
  static cgltf_result cgltf_parse_json(cgltf_options* options, const uint8_t* json_chunk, cgltf_size size, cgltf_data** out_data);
  
  cgltf_result cgltf_parse(const cgltf_options* options, const void* data, cgltf_size size, cgltf_data** out_data)
  {
  	if (size < GlbHeaderSize)
  	{
  		return cgltf_result_data_too_short;
  	}
  
  	if (options == NULL)
  	{
  		return cgltf_result_invalid_options;
  	}
  
  	cgltf_options fixed_options = *options;
  	if (fixed_options.memory.alloc == NULL)
  	{
  		fixed_options.memory.alloc = &cgltf_default_alloc;
  	}
  	if (fixed_options.memory.free == NULL)
  	{
  		fixed_options.memory.free = &cgltf_default_free;
  	}
  
  	uint32_t tmp;
  	// Magic
  	memcpy(&tmp, data, 4);
  	if (tmp != GlbMagic)
  	{
  		if (fixed_options.type == cgltf_file_type_invalid)
  		{
  			fixed_options.type = cgltf_file_type_gltf;
  		}
  		else if (fixed_options.type == cgltf_file_type_glb)
  		{
  			return cgltf_result_unknown_format;
  		}
  	}
  
  	if (fixed_options.type == cgltf_file_type_gltf)
  	{
  		cgltf_result json_result = cgltf_parse_json(&fixed_options, (const uint8_t*)data, size, out_data);
  		if (json_result != cgltf_result_success)
  		{
  			return json_result;
  		}
  
  		(*out_data)->file_type = cgltf_file_type_gltf;
  
  		return cgltf_result_success;
  	}
  
  	const uint8_t* ptr = (const uint8_t*)data;
  	// Version
  	memcpy(&tmp, ptr + 4, 4);
  	uint32_t version = tmp;
  	if (version != GlbVersion)
  	{
  		return version < GlbVersion ? cgltf_result_legacy_gltf : cgltf_result_unknown_format;
  	}
  
  	// Total length
  	memcpy(&tmp, ptr + 8, 4);
  	if (tmp > size)
  	{
  		return cgltf_result_data_too_short;
  	}
  
  	const uint8_t* json_chunk = ptr + GlbHeaderSize;
  
  	if (GlbHeaderSize + GlbChunkHeaderSize > size)
  	{
  		return cgltf_result_data_too_short;
  	}
  
  	// JSON chunk: length
  	uint32_t json_length;
  	memcpy(&json_length, json_chunk, 4);
  	if (GlbHeaderSize + GlbChunkHeaderSize + json_length > size)
  	{
  		return cgltf_result_data_too_short;
  	}
  
  	// JSON chunk: magic
  	memcpy(&tmp, json_chunk + 4, 4);
  	if (tmp != GlbMagicJsonChunk)
  	{
  		return cgltf_result_unknown_format;
  	}
  
  	json_chunk += GlbChunkHeaderSize;
  
  	const void* bin = 0;
  	cgltf_size bin_size = 0;
  
  	if (GlbHeaderSize + GlbChunkHeaderSize + json_length + GlbChunkHeaderSize <= size)
  	{
  		// We can read another chunk
  		const uint8_t* bin_chunk = json_chunk + json_length;
  
  		// Bin chunk: length
  		uint32_t bin_length;
  		memcpy(&bin_length, bin_chunk, 4);
  		if (GlbHeaderSize + GlbChunkHeaderSize + json_length + GlbChunkHeaderSize + bin_length > size)
  		{
  			return cgltf_result_data_too_short;
  		}
  
  		// Bin chunk: magic
  		memcpy(&tmp, bin_chunk + 4, 4);
  		if (tmp != GlbMagicBinChunk)
  		{
  			return cgltf_result_unknown_format;
  		}
  
  		bin_chunk += GlbChunkHeaderSize;
  
  		bin = bin_chunk;
  		bin_size = bin_length;
  	}
  
  	cgltf_result json_result = cgltf_parse_json(&fixed_options, json_chunk, json_length, out_data);
  	if (json_result != cgltf_result_success)
  	{
  		return json_result;
  	}
  
  	(*out_data)->file_type = cgltf_file_type_glb;
  	(*out_data)->bin = bin;
  	(*out_data)->bin_size = bin_size;
  
  	return cgltf_result_success;
  }
  
  cgltf_result cgltf_parse_file(const cgltf_options* options, const char* path, cgltf_data** out_data)
  {
  	if (options == NULL)
  	{
  		return cgltf_result_invalid_options;
  	}
  
  	void (*memory_free)(void*, void*) = options->memory.free ? options->memory.free : &cgltf_default_free;
  	cgltf_result (*file_read)(const struct cgltf_memory_options*, const struct cgltf_file_options*, const char*, cgltf_size*, void**) = options->file.read ? options->file.read : &cgltf_default_file_read;
  
  	void* file_data = NULL;
  	cgltf_size file_size = 0;
  	cgltf_result result = file_read(&options->memory, &options->file, path, &file_size, &file_data);
  	if (result != cgltf_result_success)
  	{
  		return result;
  	}
  
  	result = cgltf_parse(options, file_data, file_size, out_data);
  
  	if (result != cgltf_result_success)
  	{
  		memory_free(options->memory.user_data, file_data);
  		return result;
  	}
  
  	(*out_data)->file_data = file_data;
  
  	return cgltf_result_success;
  }
  
  static void cgltf_combine_paths(char* path, const char* base, const char* uri)
  {
  	const char* s0 = strrchr(base, '/');
  	const char* s1 = strrchr(base, '\\');
  	const char* slash = s0 ? (s1 && s1 > s0 ? s1 : s0) : s1;
  
  	if (slash)
  	{
  		size_t prefix = slash - base + 1;
  
  		strncpy(path, base, prefix);
  		strcpy(path + prefix, uri);
  	}
  	else
  	{
  		strcpy(path, uri);
  	}
  }
  
  static cgltf_result cgltf_load_buffer_file(const cgltf_options* options, cgltf_size size, const char* uri, const char* gltf_path, void** out_data)
  {
  	void* (*memory_alloc)(void*, cgltf_size) = options->memory.alloc ? options->memory.alloc : &cgltf_default_alloc;
  	void (*memory_free)(void*, void*) = options->memory.free ? options->memory.free : &cgltf_default_free;
  	cgltf_result (*file_read)(const struct cgltf_memory_options*, const struct cgltf_file_options*, const char*, cgltf_size*, void**) = options->file.read ? options->file.read : &cgltf_default_file_read;
  
  	char* path = (char*)memory_alloc(options->memory.user_data, strlen(uri) + strlen(gltf_path) + 1);
  	if (!path)
  	{
  		return cgltf_result_out_of_memory;
  	}
  
  	cgltf_combine_paths(path, gltf_path, uri);
  
  	// after combining, the tail of the resulting path is a uri; decode_uri converts it into path
  	cgltf_decode_uri(path + strlen(path) - strlen(uri));
  
  	void* file_data = NULL;
  	cgltf_result result = file_read(&options->memory, &options->file, path, &size, &file_data);
  
  	memory_free(options->memory.user_data, path);
  
  	*out_data = (result == cgltf_result_success) ? file_data : NULL;
  
  	return result;
  }
  
  cgltf_result cgltf_load_buffer_base64(const cgltf_options* options, cgltf_size size, const char* base64, void** out_data)
  {
  	void* (*memory_alloc)(void*, cgltf_size) = options->memory.alloc ? options->memory.alloc : &cgltf_default_alloc;
  	void (*memory_free)(void*, void*) = options->memory.free ? options->memory.free : &cgltf_default_free;
  
  	unsigned char* data = (unsigned char*)memory_alloc(options->memory.user_data, size);
  	if (!data)
  	{
  		return cgltf_result_out_of_memory;
  	}
  
  	unsigned int buffer = 0;
  	unsigned int buffer_bits = 0;
  
  	for (cgltf_size i = 0; i < size; ++i)
  	{
  		while (buffer_bits < 8)
  		{
  			char ch = *base64++;
  
  			int index =
  				(unsigned)(ch - 'A') < 26 ? (ch - 'A') :
  				(unsigned)(ch - 'a') < 26 ? (ch - 'a') + 26 :
  				(unsigned)(ch - '0') < 10 ? (ch - '0') + 52 :
  				ch == '+' ? 62 :
  				ch == '/' ? 63 :
  				-1;
  
  			if (index < 0)
  			{
  				memory_free(options->memory.user_data, data);
  				return cgltf_result_io_error;
  			}
  
  			buffer = (buffer << 6) | index;
  			buffer_bits += 6;
  		}
  
  		data[i] = (unsigned char)(buffer >> (buffer_bits - 8));
  		buffer_bits -= 8;
  	}
  
  	*out_data = data;
  
  	return cgltf_result_success;
  }
  
  static int cgltf_unhex(char ch)
  {
  	return
  		(unsigned)(ch - '0') < 10 ? (ch - '0') :
  		(unsigned)(ch - 'A') < 6 ? (ch - 'A') + 10 :
  		(unsigned)(ch - 'a') < 6 ? (ch - 'a') + 10 :
  		-1;
  }
  
  void cgltf_decode_uri(char* uri)
  {
  	char* write = uri;
  	char* i = uri;
  
  	while (*i)
  	{
  		if (*i == '%')
  		{
  			int ch1 = cgltf_unhex(i[1]);
  
  			if (ch1 >= 0)
  			{
  				int ch2 = cgltf_unhex(i[2]);
  
  				if (ch2 >= 0)
  				{
  					*write++ = (char)(ch1 * 16 + ch2);
  					i += 3;
  					continue;
  				}
  			}
  		}
  
  		*write++ = *i++;
  	}
  
  	*write = 0;
  }
  
  cgltf_result cgltf_load_buffers(const cgltf_options* options, cgltf_data* data, const char* gltf_path)
  {
  	if (options == NULL)
  	{
  		return cgltf_result_invalid_options;
  	}
  
  	if (data->buffers_count && data->buffers[0].data == NULL && data->buffers[0].uri == NULL && data->bin)
  	{
  		if (data->bin_size < data->buffers[0].size)
  		{
  			return cgltf_result_data_too_short;
  		}
  
  		data->buffers[0].data = (void*)data->bin;
  	}
  
  	for (cgltf_size i = 0; i < data->buffers_count; ++i)
  	{
  		if (data->buffers[i].data)
  		{
  			continue;
  		}
  
  		const char* uri = data->buffers[i].uri;
  
  		if (uri == NULL)
  		{
  			continue;
  		}
  
  		if (strncmp(uri, "data:", 5) == 0)
  		{
  			const char* comma = strchr(uri, ',');
  
  			if (comma && comma - uri >= 7 && strncmp(comma - 7, ";base64", 7) == 0)
  			{
  				cgltf_result res = cgltf_load_buffer_base64(options, data->buffers[i].size, comma + 1, &data->buffers[i].data);
  
  				if (res != cgltf_result_success)
  				{
  					return res;
  				}
  			}
  			else
  			{
  				return cgltf_result_unknown_format;
  			}
  		}
  		else if (strstr(uri, "://") == NULL && gltf_path)
  		{
  			cgltf_result res = cgltf_load_buffer_file(options, data->buffers[i].size, uri, gltf_path, &data->buffers[i].data);
  
  			if (res != cgltf_result_success)
  			{
  				return res;
  			}
  		}
  		else
  		{
  			return cgltf_result_unknown_format;
  		}
  	}
  
  	return cgltf_result_success;
  }
  
  static cgltf_size cgltf_calc_size(cgltf_type type, cgltf_component_type component_type);
  
  static cgltf_size cgltf_calc_index_bound(cgltf_buffer_view* buffer_view, cgltf_size offset, cgltf_component_type component_type, cgltf_size count)
  {
  	char* data = (char*)buffer_view->buffer->data + offset + buffer_view->offset;
  	cgltf_size bound = 0;
  
  	switch (component_type)
  	{
  	case cgltf_component_type_r_8u:
  		for (size_t i = 0; i < count; ++i)
  		{
  			cgltf_size v = ((unsigned char*)data)[i];
  			bound = bound > v ? bound : v;
  		}
  		break;
  
  	case cgltf_component_type_r_16u:
  		for (size_t i = 0; i < count; ++i)
  		{
  			cgltf_size v = ((unsigned short*)data)[i];
  			bound = bound > v ? bound : v;
  		}
  		break;
  
  	case cgltf_component_type_r_32u:
  		for (size_t i = 0; i < count; ++i)
  		{
  			cgltf_size v = ((unsigned int*)data)[i];
  			bound = bound > v ? bound : v;
  		}
  		break;
  
  	default:
  		;
  	}
  
  	return bound;
  }
  
  cgltf_result cgltf_validate(cgltf_data* data)
  {
  	for (cgltf_size i = 0; i < data->accessors_count; ++i)
  	{
  		cgltf_accessor* accessor = &data->accessors[i];
  
  		cgltf_size element_size = cgltf_calc_size(accessor->type, accessor->component_type);
  
  		if (accessor->buffer_view)
  		{
  			cgltf_size req_size = accessor->offset + accessor->stride * (accessor->count - 1) + element_size;
  
  			if (accessor->buffer_view->size < req_size)
  			{
  				return cgltf_result_data_too_short;
  			}
  		}
  
  		if (accessor->is_sparse)
  		{
  			cgltf_accessor_sparse* sparse = &accessor->sparse;
  
  			cgltf_size indices_component_size = cgltf_calc_size(cgltf_type_scalar, sparse->indices_component_type);
  			cgltf_size indices_req_size = sparse->indices_byte_offset + indices_component_size * sparse->count;
  			cgltf_size values_req_size = sparse->values_byte_offset + element_size * sparse->count;
  
  			if (sparse->indices_buffer_view->size < indices_req_size ||
  				sparse->values_buffer_view->size < values_req_size)
  			{
  				return cgltf_result_data_too_short;
  			}
  
  			if (sparse->indices_component_type != cgltf_component_type_r_8u &&
  				sparse->indices_component_type != cgltf_component_type_r_16u &&
  				sparse->indices_component_type != cgltf_component_type_r_32u)
  			{
  				return cgltf_result_invalid_gltf;
  			}
  
  			if (sparse->indices_buffer_view->buffer->data)
  			{
  				cgltf_size index_bound = cgltf_calc_index_bound(sparse->indices_buffer_view, sparse->indices_byte_offset, sparse->indices_component_type, sparse->count);
  
  				if (index_bound >= accessor->count)
  				{
  					return cgltf_result_data_too_short;
  				}
  			}
  		}
  	}
  
  	for (cgltf_size i = 0; i < data->buffer_views_count; ++i)
  	{
  		cgltf_size req_size = data->buffer_views[i].offset + data->buffer_views[i].size;
  
  		if (data->buffer_views[i].buffer && data->buffer_views[i].buffer->size < req_size)
  		{
  			return cgltf_result_data_too_short;
  		}
  	}
  
  	for (cgltf_size i = 0; i < data->meshes_count; ++i)
  	{
  		if (data->meshes[i].weights)
  		{
  			if (data->meshes[i].primitives_count && data->meshes[i].primitives[0].targets_count != data->meshes[i].weights_count)
  			{
  				return cgltf_result_invalid_gltf;
  			}
  		}
  
  		if (data->meshes[i].target_names)
  		{
  			if (data->meshes[i].primitives_count && data->meshes[i].primitives[0].targets_count != data->meshes[i].target_names_count)
  			{
  				return cgltf_result_invalid_gltf;
  			}
  		}
  
  		for (cgltf_size j = 0; j < data->meshes[i].primitives_count; ++j)
  		{
  			if (data->meshes[i].primitives[j].targets_count != data->meshes[i].primitives[0].targets_count)
  			{
  				return cgltf_result_invalid_gltf;
  			}
  
  			if (data->meshes[i].primitives[j].attributes_count)
  			{
  				cgltf_accessor* first = data->meshes[i].primitives[j].attributes[0].data;
  
  				for (cgltf_size k = 0; k < data->meshes[i].primitives[j].attributes_count; ++k)
  				{
  					if (data->meshes[i].primitives[j].attributes[k].data->count != first->count)
  					{
  						return cgltf_result_invalid_gltf;
  					}
  				}
  
  				for (cgltf_size k = 0; k < data->meshes[i].primitives[j].targets_count; ++k)
  				{
  					for (cgltf_size m = 0; m < data->meshes[i].primitives[j].targets[k].attributes_count; ++m)
  					{
  						if (data->meshes[i].primitives[j].targets[k].attributes[m].data->count != first->count)
  						{
  							return cgltf_result_invalid_gltf;
  						}
  					}
  				}
  
  				cgltf_accessor* indices = data->meshes[i].primitives[j].indices;
  
  				if (indices &&
  					indices->component_type != cgltf_component_type_r_8u &&
  					indices->component_type != cgltf_component_type_r_16u &&
  					indices->component_type != cgltf_component_type_r_32u)
  				{
  					return cgltf_result_invalid_gltf;
  				}
  
  				if (indices && indices->buffer_view && indices->buffer_view->buffer->data)
  				{
  					cgltf_size index_bound = cgltf_calc_index_bound(indices->buffer_view, indices->offset, indices->component_type, indices->count);
  
  					if (index_bound >= first->count)
  					{
  						return cgltf_result_data_too_short;
  					}
  				}
  			}
  		}
  	}
  
  	for (cgltf_size i = 0; i < data->nodes_count; ++i)
  	{
  		if (data->nodes[i].weights && data->nodes[i].mesh)
  		{
  			if (data->nodes[i].mesh->primitives_count && data->nodes[i].mesh->primitives[0].targets_count != data->nodes[i].weights_count)
  			{
  				return cgltf_result_invalid_gltf;
  			}
  		}
  	}
  
  	for (cgltf_size i = 0; i < data->nodes_count; ++i)
  	{
  		cgltf_node* p1 = data->nodes[i].parent;
  		cgltf_node* p2 = p1 ? p1->parent : NULL;
  
  		while (p1 && p2)
  		{
  			if (p1 == p2)
  			{
  				return cgltf_result_invalid_gltf;
  			}
  
  			p1 = p1->parent;
  			p2 = p2->parent ? p2->parent->parent : NULL;
  		}
  	}
  
  	for (cgltf_size i = 0; i < data->scenes_count; ++i)
  	{
  		for (cgltf_size j = 0; j < data->scenes[i].nodes_count; ++j)
  		{
  			if (data->scenes[i].nodes[j]->parent)
  			{
  				return cgltf_result_invalid_gltf;
  			}
  		}
  	}
  
  	for (cgltf_size i = 0; i < data->animations_count; ++i)
  	{
  		for (cgltf_size j = 0; j < data->animations[i].channels_count; ++j)
  		{
  			cgltf_animation_channel* channel = &data->animations[i].channels[j];
  
  			if (!channel->target_node)
  			{
  				continue;
  			}
  
  			cgltf_size components = 1;
  
  			if (channel->target_path == cgltf_animation_path_type_weights)
  			{
  				if (!channel->target_node->mesh || !channel->target_node->mesh->primitives_count)
  				{
  					return cgltf_result_invalid_gltf;
  				}
  
  				components = channel->target_node->mesh->primitives[0].targets_count;
  			}
  
  			cgltf_size values = channel->sampler->interpolation == cgltf_interpolation_type_cubic_spline ? 3 : 1;
  
  			if (channel->sampler->input->count * components * values != channel->sampler->output->count)
  			{
  				return cgltf_result_data_too_short;
  			}
  		}
  	}
  
  	return cgltf_result_success;
  }
  
  cgltf_result cgltf_copy_extras_json(const cgltf_data* data, const cgltf_extras* extras, char* dest, cgltf_size* dest_size)
  {
  	cgltf_size json_size = extras->end_offset - extras->start_offset;
  
  	if (!dest)
  	{
  		if (dest_size)
  		{
  			*dest_size = json_size + 1;
  			return cgltf_result_success;
  		}
  		return cgltf_result_invalid_options;
  	}
  
  	if (*dest_size + 1 < json_size)
  	{
  		strncpy(dest, data->json + extras->start_offset, *dest_size - 1);
  		dest[*dest_size - 1] = 0;
  	}
  	else
  	{
  		strncpy(dest, data->json + extras->start_offset, json_size);
  		dest[json_size] = 0;
  	}
  
  	return cgltf_result_success;
  }
  
  void cgltf_free_extensions(cgltf_data* data, cgltf_extension* extensions, cgltf_size extensions_count)
  {
  	for (cgltf_size i = 0; i < extensions_count; ++i)
  	{
  		data->memory.free(data->memory.user_data, extensions[i].name);
  		data->memory.free(data->memory.user_data, extensions[i].data);
  	}
  	data->memory.free(data->memory.user_data, extensions);
  }
  
  void cgltf_free(cgltf_data* data)
  {
  	if (!data)
  	{
  		return;
  	}
  
  	void (*file_release)(const struct cgltf_memory_options*, const struct cgltf_file_options*, void* data) = data->file.release ? data->file.release : cgltf_default_file_release;
  
  	data->memory.free(data->memory.user_data, data->asset.copyright);
  	data->memory.free(data->memory.user_data, data->asset.generator);
  	data->memory.free(data->memory.user_data, data->asset.version);
  	data->memory.free(data->memory.user_data, data->asset.min_version);
  
  	cgltf_free_extensions(data, data->asset.extensions, data->asset.extensions_count);
  
  	for (cgltf_size i = 0; i < data->accessors_count; ++i)
  	{
  		if(data->accessors[i].is_sparse)
  		{
  			cgltf_free_extensions(data, data->accessors[i].sparse.extensions, data->accessors[i].sparse.extensions_count);
  			cgltf_free_extensions(data, data->accessors[i].sparse.indices_extensions, data->accessors[i].sparse.indices_extensions_count);
  			cgltf_free_extensions(data, data->accessors[i].sparse.values_extensions, data->accessors[i].sparse.values_extensions_count);
  		}
  		cgltf_free_extensions(data, data->accessors[i].extensions, data->accessors[i].extensions_count);
  	}
  	data->memory.free(data->memory.user_data, data->accessors);
  
  	for (cgltf_size i = 0; i < data->buffer_views_count; ++i)
  	{
  		cgltf_free_extensions(data, data->buffer_views[i].extensions, data->buffer_views[i].extensions_count);
  	}
  	data->memory.free(data->memory.user_data, data->buffer_views);
  
  	for (cgltf_size i = 0; i < data->buffers_count; ++i)
  	{
  		if (data->buffers[i].data != data->bin)
  		{
  			file_release(&data->memory, &data->file, data->buffers[i].data);
  		}
  		data->memory.free(data->memory.user_data, data->buffers[i].uri);
  
  		cgltf_free_extensions(data, data->buffers[i].extensions, data->buffers[i].extensions_count);
  	}
  
  	data->memory.free(data->memory.user_data, data->buffers);
  
  	for (cgltf_size i = 0; i < data->meshes_count; ++i)
  	{
  		data->memory.free(data->memory.user_data, data->meshes[i].name);
  
  		for (cgltf_size j = 0; j < data->meshes[i].primitives_count; ++j)
  		{
  			for (cgltf_size k = 0; k < data->meshes[i].primitives[j].attributes_count; ++k)
  			{
  				data->memory.free(data->memory.user_data, data->meshes[i].primitives[j].attributes[k].name);
  			}
  
  			data->memory.free(data->memory.user_data, data->meshes[i].primitives[j].attributes);
  
  			for (cgltf_size k = 0; k < data->meshes[i].primitives[j].targets_count; ++k)
  			{
  				for (cgltf_size m = 0; m < data->meshes[i].primitives[j].targets[k].attributes_count; ++m)
  				{
  					data->memory.free(data->memory.user_data, data->meshes[i].primitives[j].targets[k].attributes[m].name);
  				}
  
  				data->memory.free(data->memory.user_data, data->meshes[i].primitives[j].targets[k].attributes);
  			}
  
  			data->memory.free(data->memory.user_data, data->meshes[i].primitives[j].targets);
  
  			if (data->meshes[i].primitives[j].has_draco_mesh_compression)
  			{
  				for (cgltf_size k = 0; k < data->meshes[i].primitives[j].draco_mesh_compression.attributes_count; ++k)
  				{
  					data->memory.free(data->memory.user_data, data->meshes[i].primitives[j].draco_mesh_compression.attributes[k].name);
  				}
  
  				data->memory.free(data->memory.user_data, data->meshes[i].primitives[j].draco_mesh_compression.attributes);
  			}
  
  			cgltf_free_extensions(data, data->meshes[i].primitives[j].extensions, data->meshes[i].primitives[j].extensions_count);
  		}
  
  		data->memory.free(data->memory.user_data, data->meshes[i].primitives);
  		data->memory.free(data->memory.user_data, data->meshes[i].weights);
  
  		for (cgltf_size j = 0; j < data->meshes[i].target_names_count; ++j)
  		{
  			data->memory.free(data->memory.user_data, data->meshes[i].target_names[j]);
  		}
  
  		cgltf_free_extensions(data, data->meshes[i].extensions, data->meshes[i].extensions_count);
  
  		data->memory.free(data->memory.user_data, data->meshes[i].target_names);
  	}
  
  	data->memory.free(data->memory.user_data, data->meshes);
  
  	for (cgltf_size i = 0; i < data->materials_count; ++i)
  	{
  		data->memory.free(data->memory.user_data, data->materials[i].name);
  
  		if(data->materials[i].has_pbr_metallic_roughness)
  		{
  			cgltf_free_extensions(data, data->materials[i].pbr_metallic_roughness.metallic_roughness_texture.extensions, data->materials[i].pbr_metallic_roughness.metallic_roughness_texture.extensions_count);
  			cgltf_free_extensions(data, data->materials[i].pbr_metallic_roughness.base_color_texture.extensions, data->materials[i].pbr_metallic_roughness.base_color_texture.extensions_count);
  		}
  		if(data->materials[i].has_pbr_specular_glossiness)
  		{
  			cgltf_free_extensions(data, data->materials[i].pbr_specular_glossiness.diffuse_texture.extensions, data->materials[i].pbr_specular_glossiness.diffuse_texture.extensions_count);
  			cgltf_free_extensions(data, data->materials[i].pbr_specular_glossiness.specular_glossiness_texture.extensions, data->materials[i].pbr_specular_glossiness.specular_glossiness_texture.extensions_count);
  		}
  		if(data->materials[i].has_clearcoat)
  		{
  			cgltf_free_extensions(data, data->materials[i].clearcoat.clearcoat_texture.extensions, data->materials[i].clearcoat.clearcoat_texture.extensions_count);
  			cgltf_free_extensions(data, data->materials[i].clearcoat.clearcoat_roughness_texture.extensions, data->materials[i].clearcoat.clearcoat_roughness_texture.extensions_count);
  			cgltf_free_extensions(data, data->materials[i].clearcoat.clearcoat_normal_texture.extensions, data->materials[i].clearcoat.clearcoat_normal_texture.extensions_count);
  		}
  		if(data->materials[i].has_specular)
  		{
  			cgltf_free_extensions(data, data->materials[i].specular.specular_texture.extensions, data->materials[i].specular.specular_texture.extensions_count);
  		}
  		if(data->materials[i].has_transmission)
  		{
  			cgltf_free_extensions(data, data->materials[i].transmission.transmission_texture.extensions, data->materials[i].transmission.transmission_texture.extensions_count);
  		}
  
  		cgltf_free_extensions(data, data->materials[i].normal_texture.extensions, data->materials[i].normal_texture.extensions_count);
  		cgltf_free_extensions(data, data->materials[i].occlusion_texture.extensions, data->materials[i].occlusion_texture.extensions_count);
  		cgltf_free_extensions(data, data->materials[i].emissive_texture.extensions, data->materials[i].emissive_texture.extensions_count);
  
  		cgltf_free_extensions(data, data->materials[i].extensions, data->materials[i].extensions_count);
  	}
  
  	data->memory.free(data->memory.user_data, data->materials);
  
  	for (cgltf_size i = 0; i < data->images_count; ++i) 
  	{
  		data->memory.free(data->memory.user_data, data->images[i].name);
  		data->memory.free(data->memory.user_data, data->images[i].uri);
  		data->memory.free(data->memory.user_data, data->images[i].mime_type);
  
  		cgltf_free_extensions(data, data->images[i].extensions, data->images[i].extensions_count);
  	}
  
  	data->memory.free(data->memory.user_data, data->images);
  
  	for (cgltf_size i = 0; i < data->textures_count; ++i)
  	{
  		data->memory.free(data->memory.user_data, data->textures[i].name);
  		cgltf_free_extensions(data, data->textures[i].extensions, data->textures[i].extensions_count);
  	}
  
  	data->memory.free(data->memory.user_data, data->textures);
  
  	for (cgltf_size i = 0; i < data->samplers_count; ++i)
  	{
  		cgltf_free_extensions(data, data->samplers[i].extensions, data->samplers[i].extensions_count);
  	}
  
  	data->memory.free(data->memory.user_data, data->samplers);
  
  	for (cgltf_size i = 0; i < data->skins_count; ++i)
  	{
  		data->memory.free(data->memory.user_data, data->skins[i].name);
  		data->memory.free(data->memory.user_data, data->skins[i].joints);
  
  		cgltf_free_extensions(data, data->skins[i].extensions, data->skins[i].extensions_count);
  	}
  
  	data->memory.free(data->memory.user_data, data->skins);
  
  	for (cgltf_size i = 0; i < data->cameras_count; ++i)
  	{
  		data->memory.free(data->memory.user_data, data->cameras[i].name);
  		cgltf_free_extensions(data, data->cameras[i].extensions, data->cameras[i].extensions_count);
  	}
  
  	data->memory.free(data->memory.user_data, data->cameras);
  
  	for (cgltf_size i = 0; i < data->lights_count; ++i)
  	{
  		data->memory.free(data->memory.user_data, data->lights[i].name);
  	}
  
  	data->memory.free(data->memory.user_data, data->lights);
  
  	for (cgltf_size i = 0; i < data->nodes_count; ++i)
  	{
  		data->memory.free(data->memory.user_data, data->nodes[i].name);
  		data->memory.free(data->memory.user_data, data->nodes[i].children);
  		data->memory.free(data->memory.user_data, data->nodes[i].weights);
  		cgltf_free_extensions(data, data->nodes[i].extensions, data->nodes[i].extensions_count);
  	}
  
  	data->memory.free(data->memory.user_data, data->nodes);
  
  	for (cgltf_size i = 0; i < data->scenes_count; ++i)
  	{
  		data->memory.free(data->memory.user_data, data->scenes[i].name);
  		data->memory.free(data->memory.user_data, data->scenes[i].nodes);
  
  		cgltf_free_extensions(data, data->scenes[i].extensions, data->scenes[i].extensions_count);
  	}
  
  	data->memory.free(data->memory.user_data, data->scenes);
  
  	for (cgltf_size i = 0; i < data->animations_count; ++i)
  	{
  		data->memory.free(data->memory.user_data, data->animations[i].name);
  		for (cgltf_size j = 0; j <  data->animations[i].samplers_count; ++j)
  		{
  			cgltf_free_extensions(data, data->animations[i].samplers[j].extensions, data->animations[i].samplers[j].extensions_count);
  		}
  		data->memory.free(data->memory.user_data, data->animations[i].samplers);
  
  		for (cgltf_size j = 0; j <  data->animations[i].channels_count; ++j)
  		{
  			cgltf_free_extensions(data, data->animations[i].channels[j].extensions, data->animations[i].channels[j].extensions_count);
  		}
  		data->memory.free(data->memory.user_data, data->animations[i].channels);
  
  		cgltf_free_extensions(data, data->animations[i].extensions, data->animations[i].extensions_count);
  	}
  
  	data->memory.free(data->memory.user_data, data->animations);
  
  	cgltf_free_extensions(data, data->data_extensions, data->data_extensions_count);
  
  	for (cgltf_size i = 0; i < data->extensions_used_count; ++i)
  	{
  		data->memory.free(data->memory.user_data, data->extensions_used[i]);
  	}
  
  	data->memory.free(data->memory.user_data, data->extensions_used);
  
  	for (cgltf_size i = 0; i < data->extensions_required_count; ++i)
  	{
  		data->memory.free(data->memory.user_data, data->extensions_required[i]);
  	}
  
  	data->memory.free(data->memory.user_data, data->extensions_required);
  
  	file_release(&data->memory, &data->file, data->file_data);
  
  	data->memory.free(data->memory.user_data, data);
  }
  
  void cgltf_node_transform_local(const cgltf_node* node, cgltf_float* out_matrix)
  {
  	cgltf_float* lm = out_matrix;
  
  	if (node->has_matrix)
  	{
  		memcpy(lm, node->matrix, sizeof(float) * 16);
  	}
  	else
  	{
  		float tx = node->translation[0];
  		float ty = node->translation[1];
  		float tz = node->translation[2];
  
  		float qx = node->rotation[0];
  		float qy = node->rotation[1];
  		float qz = node->rotation[2];
  		float qw = node->rotation[3];
  
  		float sx = node->scale[0];
  		float sy = node->scale[1];
  		float sz = node->scale[2];
  
  		lm[0] = (1 - 2 * qy*qy - 2 * qz*qz) * sx;
  		lm[1] = (2 * qx*qy + 2 * qz*qw) * sx;
  		lm[2] = (2 * qx*qz - 2 * qy*qw) * sx;
  		lm[3] = 0.f;
  
  		lm[4] = (2 * qx*qy - 2 * qz*qw) * sy;
  		lm[5] = (1 - 2 * qx*qx - 2 * qz*qz) * sy;
  		lm[6] = (2 * qy*qz + 2 * qx*qw) * sy;
  		lm[7] = 0.f;
  
  		lm[8] = (2 * qx*qz + 2 * qy*qw) * sz;
  		lm[9] = (2 * qy*qz - 2 * qx*qw) * sz;
  		lm[10] = (1 - 2 * qx*qx - 2 * qy*qy) * sz;
  		lm[11] = 0.f;
  
  		lm[12] = tx;
  		lm[13] = ty;
  		lm[14] = tz;
  		lm[15] = 1.f;
  	}
  }
  
  void cgltf_node_transform_world(const cgltf_node* node, cgltf_float* out_matrix)
  {
  	cgltf_float* lm = out_matrix;
  	cgltf_node_transform_local(node, lm);
  
  	const cgltf_node* parent = node->parent;
  
  	while (parent)
  	{
  		float pm[16];
  		cgltf_node_transform_local(parent, pm);
  
  		for (int i = 0; i < 4; ++i)
  		{
  			float l0 = lm[i * 4 + 0];
  			float l1 = lm[i * 4 + 1];
  			float l2 = lm[i * 4 + 2];
  
  			float r0 = l0 * pm[0] + l1 * pm[4] + l2 * pm[8];
  			float r1 = l0 * pm[1] + l1 * pm[5] + l2 * pm[9];
  			float r2 = l0 * pm[2] + l1 * pm[6] + l2 * pm[10];
  
  			lm[i * 4 + 0] = r0;
  			lm[i * 4 + 1] = r1;
  			lm[i * 4 + 2] = r2;
  		}
  
  		lm[12] += pm[12];
  		lm[13] += pm[13];
  		lm[14] += pm[14];
  
  		parent = parent->parent;
  	}
  }
  
  static cgltf_size cgltf_component_read_index(const void* in, cgltf_component_type component_type)
  {
  	switch (component_type)
  	{
  		case cgltf_component_type_r_16:
  			return *((const int16_t*) in);
  		case cgltf_component_type_r_16u:
  			return *((const uint16_t*) in);
  		case cgltf_component_type_r_32u:
  			return *((const uint32_t*) in);
  		case cgltf_component_type_r_32f:
  			return (cgltf_size)*((const float*) in);
  		case cgltf_component_type_r_8:
  			return *((const int8_t*) in);
  		case cgltf_component_type_r_8u:
  			return *((const uint8_t*) in);
  		default:
  			return 0;
  	}
  }
  
  static cgltf_float cgltf_component_read_float(const void* in, cgltf_component_type component_type, cgltf_bool normalized)
  {
  	if (component_type == cgltf_component_type_r_32f)
  	{
  		return *((const float*) in);
  	}
  
  	if (normalized)
  	{
  		switch (component_type)
  		{
  			// note: glTF spec doesn't currently define normalized conversions for 32-bit integers
  			case cgltf_component_type_r_16:
  				return *((const int16_t*) in) / (cgltf_float)32767;
  			case cgltf_component_type_r_16u:
  				return *((const uint16_t*) in) / (cgltf_float)65535;
  			case cgltf_component_type_r_8:
  				return *((const int8_t*) in) / (cgltf_float)127;
  			case cgltf_component_type_r_8u:
  				return *((const uint8_t*) in) / (cgltf_float)255;
  			default:
  				return 0;
  		}
  	}
  
  	return (cgltf_float)cgltf_component_read_index(in, component_type);
  }
  
  static cgltf_size cgltf_component_size(cgltf_component_type component_type);
  
  static cgltf_bool cgltf_element_read_float(const uint8_t* element, cgltf_type type, cgltf_component_type component_type, cgltf_bool normalized, cgltf_float* out, cgltf_size element_size)
  {
  	cgltf_size num_components = cgltf_num_components(type);
  
  	if (element_size < num_components) {
  		return 0;
  	}
  
  	// There are three special cases for component extraction, see #data-alignment in the 2.0 spec.
  
  	cgltf_size component_size = cgltf_component_size(component_type);
  
  	if (type == cgltf_type_mat2 && component_size == 1)
  	{
  		out[0] = cgltf_component_read_float(element, component_type, normalized);
  		out[1] = cgltf_component_read_float(element + 1, component_type, normalized);
  		out[2] = cgltf_component_read_float(element + 4, component_type, normalized);
  		out[3] = cgltf_component_read_float(element + 5, component_type, normalized);
  		return 1;
  	}
  
  	if (type == cgltf_type_mat3 && component_size == 1)
  	{
  		out[0] = cgltf_component_read_float(element, component_type, normalized);
  		out[1] = cgltf_component_read_float(element + 1, component_type, normalized);
  		out[2] = cgltf_component_read_float(element + 2, component_type, normalized);
  		out[3] = cgltf_component_read_float(element + 4, component_type, normalized);
  		out[4] = cgltf_component_read_float(element + 5, component_type, normalized);
  		out[5] = cgltf_component_read_float(element + 6, component_type, normalized);
  		out[6] = cgltf_component_read_float(element + 8, component_type, normalized);
  		out[7] = cgltf_component_read_float(element + 9, component_type, normalized);
  		out[8] = cgltf_component_read_float(element + 10, component_type, normalized);
  		return 1;
  	}
  
  	if (type == cgltf_type_mat3 && component_size == 2)
  	{
  		out[0] = cgltf_component_read_float(element, component_type, normalized);
  		out[1] = cgltf_component_read_float(element + 2, component_type, normalized);
  		out[2] = cgltf_component_read_float(element + 4, component_type, normalized);
  		out[3] = cgltf_component_read_float(element + 8, component_type, normalized);
  		out[4] = cgltf_component_read_float(element + 10, component_type, normalized);
  		out[5] = cgltf_component_read_float(element + 12, component_type, normalized);
  		out[6] = cgltf_component_read_float(element + 16, component_type, normalized);
  		out[7] = cgltf_component_read_float(element + 18, component_type, normalized);
  		out[8] = cgltf_component_read_float(element + 20, component_type, normalized);
  		return 1;
  	}
  
  	for (cgltf_size i = 0; i < num_components; ++i)
  	{
  		out[i] = cgltf_component_read_float(element + component_size * i, component_type, normalized);
  	}
  	return 1;
  }
  
  cgltf_bool cgltf_accessor_read_float(const cgltf_accessor* accessor, cgltf_size index, cgltf_float* out, cgltf_size element_size)
  {
  	if (accessor->is_sparse)
  	{
  		return 0;
  	}
  	if (accessor->buffer_view == NULL)
  	{
  		memset(out, 0, element_size * sizeof(cgltf_float));
  		return 1;
  	}
  	if (accessor->buffer_view->buffer->data == NULL)
  	{
  		return 0;
  	}
  	cgltf_size offset = accessor->offset + accessor->buffer_view->offset;
  	const uint8_t* element = (const uint8_t*) accessor->buffer_view->buffer->data;
  	element += offset + accessor->stride * index;
  	return cgltf_element_read_float(element, accessor->type, accessor->component_type, accessor->normalized, out, element_size);
  }
  
  cgltf_size cgltf_accessor_unpack_floats(const cgltf_accessor* accessor, cgltf_float* out, cgltf_size float_count)
  {
  	cgltf_size floats_per_element = cgltf_num_components(accessor->type);
  	cgltf_size available_floats = accessor->count * floats_per_element;
  	if (out == NULL)
  	{
  		return available_floats;
  	}
  
  	float_count = available_floats < float_count ? available_floats : float_count;
  	cgltf_size element_count = float_count / floats_per_element;
  
  	// First pass: convert each element in the base accessor.
  	cgltf_float* dest = out;
  	cgltf_accessor dense = *accessor;
  	dense.is_sparse = 0;
  	for (cgltf_size index = 0; index < element_count; index++, dest += floats_per_element)
  	{
  		if (!cgltf_accessor_read_float(&dense, index, dest, floats_per_element))
  		{
  			return 0;
  		}
  	}
  
  	// Second pass: write out each element in the sparse accessor.
  	if (accessor->is_sparse)
  	{
  		const cgltf_accessor_sparse* sparse = &dense.sparse;
  
  		if (sparse->indices_buffer_view->buffer->data == NULL || sparse->values_buffer_view->buffer->data == NULL)
  		{
  			return 0;
  		}
  
  		const uint8_t* index_data = (const uint8_t*) sparse->indices_buffer_view->buffer->data;
  		index_data += sparse->indices_byte_offset + sparse->indices_buffer_view->offset;
  		cgltf_size index_stride = cgltf_component_size(sparse->indices_component_type);
  		const uint8_t* reader_head = (const uint8_t*) sparse->values_buffer_view->buffer->data;
  		reader_head += sparse->values_byte_offset + sparse->values_buffer_view->offset;
  		for (cgltf_size reader_index = 0; reader_index < sparse->count; reader_index++, index_data += index_stride)
  		{
  			size_t writer_index = cgltf_component_read_index(index_data, sparse->indices_component_type);
  			float* writer_head = out + writer_index * floats_per_element;
  
  			if (!cgltf_element_read_float(reader_head, dense.type, dense.component_type, dense.normalized, writer_head, floats_per_element))
  			{
  				return 0;
  			}
  
  			reader_head += dense.stride;
  		}
  	}
  
  	return element_count * floats_per_element;
  }
  
  static cgltf_uint cgltf_component_read_uint(const void* in, cgltf_component_type component_type)
  {
  	switch (component_type)
  	{
  		case cgltf_component_type_r_8:
  			return *((const int8_t*) in);
  
  		case cgltf_component_type_r_8u:
  			return *((const uint8_t*) in);
  
  		case cgltf_component_type_r_16:
  			return *((const int16_t*) in);
  
  		case cgltf_component_type_r_16u:
  			return *((const uint16_t*) in);
  
  		case cgltf_component_type_r_32u:
  			return *((const uint32_t*) in);
  
  		default:
  			return 0;
  	}
  }
  
  static cgltf_bool cgltf_element_read_uint(const uint8_t* element, cgltf_type type, cgltf_component_type component_type, cgltf_uint* out, cgltf_size element_size)
  {
      cgltf_size num_components = cgltf_num_components(type);
  
      if (element_size < num_components)
      {
          return 0;
      }
  
  	// Reading integer matrices is not a valid use case
      if (type == cgltf_type_mat2 || type == cgltf_type_mat3 || type == cgltf_type_mat4)
      {
          return 0;
      }
  
      cgltf_size component_size = cgltf_component_size(component_type);
  
      for (cgltf_size i = 0; i < num_components; ++i)
      {
          out[i] = cgltf_component_read_uint(element + component_size * i, component_type);
      }
      return 1;
  }
  
  cgltf_bool cgltf_accessor_read_uint(const cgltf_accessor* accessor, cgltf_size index, cgltf_uint* out, cgltf_size element_size)
  {
      if (accessor->is_sparse)
      {
          return 0;
      }
      if (accessor->buffer_view == NULL)
      {
          memset(out, 0, element_size * sizeof( cgltf_uint ));
          return 1;
      }
      if (accessor->buffer_view->buffer->data == NULL)
      {
          return 0;
      }
      cgltf_size offset = accessor->offset + accessor->buffer_view->offset;
      const uint8_t* element = (const uint8_t*) accessor->buffer_view->buffer->data;
      element += offset + accessor->stride * index;
      return cgltf_element_read_uint(element, accessor->type, accessor->component_type, out, element_size);
  }
  
  cgltf_size cgltf_accessor_read_index(const cgltf_accessor* accessor, cgltf_size index)
  {
  	if (accessor->is_sparse)
  	{
  		return 0; // This is an error case, but we can't communicate the error with existing interface.
  	}
  	if (accessor->buffer_view == NULL)
  	{
  		return 0;
  	}
  	if (accessor->buffer_view->buffer->data == NULL)
  	{
  		return 0; // This is an error case, but we can't communicate the error with existing interface.
  	}
  
  	cgltf_size offset = accessor->offset + accessor->buffer_view->offset;
  	const uint8_t* element = (const uint8_t*) accessor->buffer_view->buffer->data;
  	element += offset + accessor->stride * index;
  	return cgltf_component_read_index(element, accessor->component_type);
  }
  
  #define CGLTF_ERROR_JSON -1
  #define CGLTF_ERROR_NOMEM -2
  #define CGLTF_ERROR_LEGACY -3
  
  #define CGLTF_CHECK_TOKTYPE(tok_, type_) if ((tok_).type != (type_)) { return CGLTF_ERROR_JSON; }
  #define CGLTF_CHECK_KEY(tok_) if ((tok_).type != JSMN_STRING || (tok_).size == 0) { return CGLTF_ERROR_JSON; } /* checking size for 0 verifies that a value follows the key */
  
  #define CGLTF_PTRINDEX(type, idx) (type*)((cgltf_size)idx + 1)
  #define CGLTF_PTRFIXUP(var, data, size) if (var) { if ((cgltf_size)var > size) { return CGLTF_ERROR_JSON; } var = &data[(cgltf_size)var-1]; }
  #define CGLTF_PTRFIXUP_REQ(var, data, size) if (!var || (cgltf_size)var > size) { return CGLTF_ERROR_JSON; } var = &data[(cgltf_size)var-1];
  
  static int cgltf_json_strcmp(jsmntok_t const* tok, const uint8_t* json_chunk, const char* str)
  {
  	CGLTF_CHECK_TOKTYPE(*tok, JSMN_STRING);
  	size_t const str_len = strlen(str);
  	size_t const name_length = tok->end - tok->start;
  	return (str_len == name_length) ? strncmp((const char*)json_chunk + tok->start, str, str_len) : 128;
  }
  
  static int cgltf_json_to_int(jsmntok_t const* tok, const uint8_t* json_chunk)
  {
  	CGLTF_CHECK_TOKTYPE(*tok, JSMN_PRIMITIVE);
  	char tmp[128];
  	int size = (cgltf_size)(tok->end - tok->start) < sizeof(tmp) ? tok->end - tok->start : (int)(sizeof(tmp) - 1);
  	strncpy(tmp, (const char*)json_chunk + tok->start, size);
  	tmp[size] = 0;
  	return CGLTF_ATOI(tmp);
  }
  
  static cgltf_float cgltf_json_to_float(jsmntok_t const* tok, const uint8_t* json_chunk)
  {
  	CGLTF_CHECK_TOKTYPE(*tok, JSMN_PRIMITIVE);
  	char tmp[128];
  	int size = (cgltf_size)(tok->end - tok->start) < sizeof(tmp) ? tok->end - tok->start : (int)(sizeof(tmp) - 1);
  	strncpy(tmp, (const char*)json_chunk + tok->start, size);
  	tmp[size] = 0;
  	return (cgltf_float)CGLTF_ATOF(tmp);
  }
  
  static cgltf_bool cgltf_json_to_bool(jsmntok_t const* tok, const uint8_t* json_chunk)
  {
  	int size = tok->end - tok->start;
  	return size == 4 && memcmp(json_chunk + tok->start, "true", 4) == 0;
  }
  
  static int cgltf_skip_json(jsmntok_t const* tokens, int i)
  {
  	int end = i + 1;
  
  	while (i < end)
  	{
  		switch (tokens[i].type)
  		{
  		case JSMN_OBJECT:
  			end += tokens[i].size * 2;
  			break;
  
  		case JSMN_ARRAY:
  			end += tokens[i].size;
  			break;
  
  		case JSMN_PRIMITIVE:
  		case JSMN_STRING:
  			break;
  
  		default:
  			return -1;
  		}
  
  		i++;
  	}
  
  	return i;
  }
  
  static void cgltf_fill_float_array(float* out_array, int size, float value)
  {
  	for (int j = 0; j < size; ++j)
  	{
  		out_array[j] = value;
  	}
  }
  
  static int cgltf_parse_json_float_array(jsmntok_t const* tokens, int i, const uint8_t* json_chunk, float* out_array, int size)
  {
  	CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_ARRAY);
  	if (tokens[i].size != size)
  	{
  		return CGLTF_ERROR_JSON;
  	}
  	++i;
  	for (int j = 0; j < size; ++j)
  	{
  		CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_PRIMITIVE);
  		out_array[j] = cgltf_json_to_float(tokens + i, json_chunk);
  		++i;
  	}
  	return i;
  }
  
  static int cgltf_parse_json_string(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, char** out_string)
  {
  	CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_STRING);
  	if (*out_string)
  	{
  		return CGLTF_ERROR_JSON;
  	}
  	int size = tokens[i].end - tokens[i].start;
  	char* result = (char*)options->memory.alloc(options->memory.user_data, size + 1);
  	if (!result)
  	{
  		return CGLTF_ERROR_NOMEM;
  	}
  	strncpy(result, (const char*)json_chunk + tokens[i].start, size);
  	result[size] = 0;
  	*out_string = result;
  	return i + 1;
  }
  
  static int cgltf_parse_json_array(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, size_t element_size, void** out_array, cgltf_size* out_size)
  {
  	(void)json_chunk;
  	if (tokens[i].type != JSMN_ARRAY)
  	{
  		return tokens[i].type == JSMN_OBJECT ? CGLTF_ERROR_LEGACY : CGLTF_ERROR_JSON;
  	}
  	if (*out_array)
  	{
  		return CGLTF_ERROR_JSON;
  	}
  	int size = tokens[i].size;
  	void* result = cgltf_calloc(options, element_size, size);
  	if (!result)
  	{
  		return CGLTF_ERROR_NOMEM;
  	}
  	*out_array = result;
  	*out_size = size;
  	return i + 1;
  }
  
  static int cgltf_parse_json_string_array(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, char*** out_array, cgltf_size* out_size)
  {
      CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_ARRAY);
      i = cgltf_parse_json_array(options, tokens, i, json_chunk, sizeof(char*), (void**)out_array, out_size);
      if (i < 0)
      {
          return i;
      }
  
      for (cgltf_size j = 0; j < *out_size; ++j)
      {
          i = cgltf_parse_json_string(options, tokens, i, json_chunk, j + (*out_array));
          if (i < 0)
          {
              return i;
          }
      }
      return i;
  }
  
  static void cgltf_parse_attribute_type(const char* name, cgltf_attribute_type* out_type, int* out_index)
  {
  	const char* us = strchr(name, '_');
  	size_t len = us ? (size_t)(us - name) : strlen(name);
  
  	if (len == 8 && strncmp(name, "POSITION", 8) == 0)
  	{
  		*out_type = cgltf_attribute_type_position;
  	}
  	else if (len == 6 && strncmp(name, "NORMAL", 6) == 0)
  	{
  		*out_type = cgltf_attribute_type_normal;
  	}
  	else if (len == 7 && strncmp(name, "TANGENT", 7) == 0)
  	{
  		*out_type = cgltf_attribute_type_tangent;
  	}
  	else if (len == 8 && strncmp(name, "TEXCOORD", 8) == 0)
  	{
  		*out_type = cgltf_attribute_type_texcoord;
  	}
  	else if (len == 5 && strncmp(name, "COLOR", 5) == 0)
  	{
  		*out_type = cgltf_attribute_type_color;
  	}
  	else if (len == 6 && strncmp(name, "JOINTS", 6) == 0)
  	{
  		*out_type = cgltf_attribute_type_joints;
  	}
  	else if (len == 7 && strncmp(name, "WEIGHTS", 7) == 0)
  	{
  		*out_type = cgltf_attribute_type_weights;
  	}
  	else
  	{
  		*out_type = cgltf_attribute_type_invalid;
  	}
  
  	if (us && *out_type != cgltf_attribute_type_invalid)
  	{
  		*out_index = CGLTF_ATOI(us + 1);
  	}
  }
  
  static int cgltf_parse_json_attribute_list(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_attribute** out_attributes, cgltf_size* out_attributes_count)
  {
  	CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
  
  	if (*out_attributes)
  	{
  		return CGLTF_ERROR_JSON;
  	}
  
  	*out_attributes_count = tokens[i].size;
  	*out_attributes = (cgltf_attribute*)cgltf_calloc(options, sizeof(cgltf_attribute), *out_attributes_count);
  	++i;
  
  	if (!*out_attributes)
  	{
  		return CGLTF_ERROR_NOMEM;
  	}
  
  	for (cgltf_size j = 0; j < *out_attributes_count; ++j)
  	{
  		CGLTF_CHECK_KEY(tokens[i]);
  
  		i = cgltf_parse_json_string(options, tokens, i, json_chunk, &(*out_attributes)[j].name);
  		if (i < 0)
  		{
  			return CGLTF_ERROR_JSON;
  		}
  
  		cgltf_parse_attribute_type((*out_attributes)[j].name, &(*out_attributes)[j].type, &(*out_attributes)[j].index);
  
  		(*out_attributes)[j].data = CGLTF_PTRINDEX(cgltf_accessor, cgltf_json_to_int(tokens + i, json_chunk));
  		++i;
  	}
  
  	return i;
  }
  
  static int cgltf_parse_json_extras(jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_extras* out_extras)
  {
  	(void)json_chunk;
  	out_extras->start_offset = tokens[i].start;
  	out_extras->end_offset = tokens[i].end;
  	i = cgltf_skip_json(tokens, i);
  	return i;
  }
  
  static int cgltf_parse_json_unprocessed_extension(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_extension* out_extension)
  {
  	CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_STRING);
  	CGLTF_CHECK_TOKTYPE(tokens[i+1], JSMN_OBJECT);
  	if (out_extension->name)
  	{
  		return CGLTF_ERROR_JSON;
  	}
  
  	cgltf_size name_length = tokens[i].end - tokens[i].start;
  	out_extension->name = (char*)options->memory.alloc(options->memory.user_data, name_length + 1);
  	if (!out_extension->name)
  	{
  		return CGLTF_ERROR_NOMEM;
  	}
  	strncpy(out_extension->name, (const char*)json_chunk + tokens[i].start, name_length);
  	out_extension->name[name_length] = 0;
  	i++;
  
  	size_t start = tokens[i].start;
  	size_t size = tokens[i].end - start;
  	out_extension->data = (char*)options->memory.alloc(options->memory.user_data, size + 1);
  	if (!out_extension->data)
  	{
  		return CGLTF_ERROR_NOMEM;
  	}
  	strncpy(out_extension->data, (const char*)json_chunk + start, size);
  	out_extension->data[size] = '\0';
  
  	i = cgltf_skip_json(tokens, i);
  
  	return i;
  }
  
  static int cgltf_parse_json_unprocessed_extensions(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_size* out_extensions_count, cgltf_extension** out_extensions)
  {
  	++i;
  
  	CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
  	if(*out_extensions)
  	{
  		return CGLTF_ERROR_JSON;
  	}
  
  	int extensions_size = tokens[i].size;
  	*out_extensions_count = 0;
  	*out_extensions = (cgltf_extension*)cgltf_calloc(options, sizeof(cgltf_extension), extensions_size);
  
  	if (!*out_extensions)
  	{
  		return CGLTF_ERROR_NOMEM;
  	}
  
  	++i;
  
  	for (int j = 0; j < extensions_size; ++j)
  	{
  		CGLTF_CHECK_KEY(tokens[i]);
  
  		cgltf_size extension_index = (*out_extensions_count)++;
  		cgltf_extension* extension = &((*out_extensions)[extension_index]);
  		i = cgltf_parse_json_unprocessed_extension(options, tokens, i, json_chunk, extension);
  
  		if (i < 0)
  		{
  			return i;
  		}
  	}
  	return i;
  }
  
  static int cgltf_parse_json_draco_mesh_compression(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_draco_mesh_compression* out_draco_mesh_compression)
  {
  	CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
  
  	int size = tokens[i].size;
  	++i;
  
  	for (int j = 0; j < size; ++j)
  	{
  		CGLTF_CHECK_KEY(tokens[i]);
  
  		if (cgltf_json_strcmp(tokens + i, json_chunk, "attributes") == 0)
  		{
  			i = cgltf_parse_json_attribute_list(options, tokens, i + 1, json_chunk, &out_draco_mesh_compression->attributes, &out_draco_mesh_compression->attributes_count);
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "bufferView") == 0)
  		{
  			++i;
  			out_draco_mesh_compression->buffer_view = CGLTF_PTRINDEX(cgltf_buffer_view, cgltf_json_to_int(tokens + i, json_chunk));
  			++i;
  		}
  	}
  
  	return i;
  }
  
  static int cgltf_parse_json_primitive(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_primitive* out_prim)
  {
  	CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
  
  	out_prim->type = cgltf_primitive_type_triangles;
  
  	int size = tokens[i].size;
  	++i;
  
  	for (int j = 0; j < size; ++j)
  	{
  		CGLTF_CHECK_KEY(tokens[i]);
  
  		if (cgltf_json_strcmp(tokens+i, json_chunk, "mode") == 0)
  		{
  			++i;
  			out_prim->type
  					= (cgltf_primitive_type)
  					cgltf_json_to_int(tokens+i, json_chunk);
  			++i;
  		}
  		else if (cgltf_json_strcmp(tokens+i, json_chunk, "indices") == 0)
  		{
  			++i;
  			out_prim->indices = CGLTF_PTRINDEX(cgltf_accessor, cgltf_json_to_int(tokens + i, json_chunk));
  			++i;
  		}
  		else if (cgltf_json_strcmp(tokens+i, json_chunk, "material") == 0)
  		{
  			++i;
  			out_prim->material = CGLTF_PTRINDEX(cgltf_material, cgltf_json_to_int(tokens + i, json_chunk));
  			++i;
  		}
  		else if (cgltf_json_strcmp(tokens+i, json_chunk, "attributes") == 0)
  		{
  			i = cgltf_parse_json_attribute_list(options, tokens, i + 1, json_chunk, &out_prim->attributes, &out_prim->attributes_count);
  		}
  		else if (cgltf_json_strcmp(tokens+i, json_chunk, "targets") == 0)
  		{
  			i = cgltf_parse_json_array(options, tokens, i + 1, json_chunk, sizeof(cgltf_morph_target), (void**)&out_prim->targets, &out_prim->targets_count);
  			if (i < 0)
  			{
  				return i;
  			}
  
  			for (cgltf_size k = 0; k < out_prim->targets_count; ++k)
  			{
  				i = cgltf_parse_json_attribute_list(options, tokens, i, json_chunk, &out_prim->targets[k].attributes, &out_prim->targets[k].attributes_count);
  				if (i < 0)
  				{
  					return i;
  				}
  			}
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "extras") == 0)
  		{
  			i = cgltf_parse_json_extras(tokens, i + 1, json_chunk, &out_prim->extras);
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "extensions") == 0)
  		{
  			++i;
  
  			CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
  			if(out_prim->extensions)
  			{
  				return CGLTF_ERROR_JSON;
  			}
  
  			int extensions_size = tokens[i].size;
  			out_prim->extensions_count = 0;
  			out_prim->extensions = (cgltf_extension*)cgltf_calloc(options, sizeof(cgltf_extension), extensions_size);
  
  			if (!out_prim->extensions)
  			{
  				return CGLTF_ERROR_NOMEM;
  			}
  
  			++i;
  			for (int k = 0; k < extensions_size; ++k)
  			{
  				CGLTF_CHECK_KEY(tokens[i]);
  
  				if (cgltf_json_strcmp(tokens+i, json_chunk, "KHR_draco_mesh_compression") == 0)
  				{
  					out_prim->has_draco_mesh_compression = 1;
  					i = cgltf_parse_json_draco_mesh_compression(options, tokens, i + 1, json_chunk, &out_prim->draco_mesh_compression);
  				}
  				else
  				{
  					i = cgltf_parse_json_unprocessed_extension(options, tokens, i, json_chunk, &(out_prim->extensions[out_prim->extensions_count++]));
  				}
  
  				if (i < 0)
  				{
  					return i;
  				}
  			}
  		}
  		else
  		{
  			i = cgltf_skip_json(tokens, i+1);
  		}
  
  		if (i < 0)
  		{
  			return i;
  		}
  	}
  
  	return i;
  }
  
  static int cgltf_parse_json_mesh(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_mesh* out_mesh)
  {
  	CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
  
  	int size = tokens[i].size;
  	++i;
  
  	for (int j = 0; j < size; ++j)
  	{
  		CGLTF_CHECK_KEY(tokens[i]);
  
  		if (cgltf_json_strcmp(tokens+i, json_chunk, "name") == 0)
  		{
  			i = cgltf_parse_json_string(options, tokens, i + 1, json_chunk, &out_mesh->name);
  		}
  		else if (cgltf_json_strcmp(tokens+i, json_chunk, "primitives") == 0)
  		{
  			i = cgltf_parse_json_array(options, tokens, i + 1, json_chunk, sizeof(cgltf_primitive), (void**)&out_mesh->primitives, &out_mesh->primitives_count);
  			if (i < 0)
  			{
  				return i;
  			}
  
  			for (cgltf_size prim_index = 0; prim_index < out_mesh->primitives_count; ++prim_index)
  			{
  				i = cgltf_parse_json_primitive(options, tokens, i, json_chunk, &out_mesh->primitives[prim_index]);
  				if (i < 0)
  				{
  					return i;
  				}
  			}
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "weights") == 0)
  		{
  			i = cgltf_parse_json_array(options, tokens, i + 1, json_chunk, sizeof(cgltf_float), (void**)&out_mesh->weights, &out_mesh->weights_count);
  			if (i < 0)
  			{
  				return i;
  			}
  
  			i = cgltf_parse_json_float_array(tokens, i - 1, json_chunk, out_mesh->weights, (int)out_mesh->weights_count);
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "extras") == 0)
  		{
  			++i;
  
  			out_mesh->extras.start_offset = tokens[i].start;
  			out_mesh->extras.end_offset = tokens[i].end;
  
  			if (tokens[i].type == JSMN_OBJECT)
  			{
  				int extras_size = tokens[i].size;
  				++i;
  
  				for (int k = 0; k < extras_size; ++k)
  				{
  					CGLTF_CHECK_KEY(tokens[i]);
  
  					if (cgltf_json_strcmp(tokens+i, json_chunk, "targetNames") == 0)
  					{
  						i = cgltf_parse_json_string_array(options, tokens, i + 1, json_chunk, &out_mesh->target_names, &out_mesh->target_names_count);
  					}
  					else
  					{
  						i = cgltf_skip_json(tokens, i+1);
  					}
  
  					if (i < 0)
  					{
  						return i;
  					}
  				}
  			}
  			else
  			{
  				i = cgltf_skip_json(tokens, i);
  			}
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "extensions") == 0)
  		{
  			i = cgltf_parse_json_unprocessed_extensions(options, tokens, i, json_chunk, &out_mesh->extensions_count, &out_mesh->extensions);
  		}
  		else
  		{
  			i = cgltf_skip_json(tokens, i+1);
  		}
  
  		if (i < 0)
  		{
  			return i;
  		}
  	}
  
  	return i;
  }
  
  static int cgltf_parse_json_meshes(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_data* out_data)
  {
  	i = cgltf_parse_json_array(options, tokens, i, json_chunk, sizeof(cgltf_mesh), (void**)&out_data->meshes, &out_data->meshes_count);
  	if (i < 0)
  	{
  		return i;
  	}
  
  	for (cgltf_size j = 0; j < out_data->meshes_count; ++j)
  	{
  		i = cgltf_parse_json_mesh(options, tokens, i, json_chunk, &out_data->meshes[j]);
  		if (i < 0)
  		{
  			return i;
  		}
  	}
  	return i;
  }
  
  static cgltf_component_type cgltf_json_to_component_type(jsmntok_t const* tok, const uint8_t* json_chunk)
  {
  	int type = cgltf_json_to_int(tok, json_chunk);
  
  	switch (type)
  	{
  	case 5120:
  		return cgltf_component_type_r_8;
  	case 5121:
  		return cgltf_component_type_r_8u;
  	case 5122:
  		return cgltf_component_type_r_16;
  	case 5123:
  		return cgltf_component_type_r_16u;
  	case 5125:
  		return cgltf_component_type_r_32u;
  	case 5126:
  		return cgltf_component_type_r_32f;
  	default:
  		return cgltf_component_type_invalid;
  	}
  }
  
  static int cgltf_parse_json_accessor_sparse(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_accessor_sparse* out_sparse)
  {
  	CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
  
  	int size = tokens[i].size;
  	++i;
  
  	for (int j = 0; j < size; ++j)
  	{
  		CGLTF_CHECK_KEY(tokens[i]);
  
  		if (cgltf_json_strcmp(tokens+i, json_chunk, "count") == 0)
  		{
  			++i;
  			out_sparse->count = cgltf_json_to_int(tokens + i, json_chunk);
  			++i;
  		}
  		else if (cgltf_json_strcmp(tokens+i, json_chunk, "indices") == 0)
  		{
  			++i;
  			CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
  
  			int indices_size = tokens[i].size;
  			++i;
  
  			for (int k = 0; k < indices_size; ++k)
  			{
  				CGLTF_CHECK_KEY(tokens[i]);
  
  				if (cgltf_json_strcmp(tokens+i, json_chunk, "bufferView") == 0)
  				{
  					++i;
  					out_sparse->indices_buffer_view = CGLTF_PTRINDEX(cgltf_buffer_view, cgltf_json_to_int(tokens + i, json_chunk));
  					++i;
  				}
  				else if (cgltf_json_strcmp(tokens+i, json_chunk, "byteOffset") == 0)
  				{
  					++i;
  					out_sparse->indices_byte_offset = cgltf_json_to_int(tokens + i, json_chunk);
  					++i;
  				}
  				else if (cgltf_json_strcmp(tokens+i, json_chunk, "componentType") == 0)
  				{
  					++i;
  					out_sparse->indices_component_type = cgltf_json_to_component_type(tokens + i, json_chunk);
  					++i;
  				}
  				else if (cgltf_json_strcmp(tokens + i, json_chunk, "extras") == 0)
  				{
  					i = cgltf_parse_json_extras(tokens, i + 1, json_chunk, &out_sparse->indices_extras);
  				}
  				else if (cgltf_json_strcmp(tokens + i, json_chunk, "extensions") == 0)
  				{
  					i = cgltf_parse_json_unprocessed_extensions(options, tokens, i, json_chunk, &out_sparse->indices_extensions_count, &out_sparse->indices_extensions);
  				}
  				else
  				{
  					i = cgltf_skip_json(tokens, i+1);
  				}
  
  				if (i < 0)
  				{
  					return i;
  				}
  			}
  		}
  		else if (cgltf_json_strcmp(tokens+i, json_chunk, "values") == 0)
  		{
  			++i;
  			CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
  
  			int values_size = tokens[i].size;
  			++i;
  
  			for (int k = 0; k < values_size; ++k)
  			{
  				CGLTF_CHECK_KEY(tokens[i]);
  
  				if (cgltf_json_strcmp(tokens+i, json_chunk, "bufferView") == 0)
  				{
  					++i;
  					out_sparse->values_buffer_view = CGLTF_PTRINDEX(cgltf_buffer_view, cgltf_json_to_int(tokens + i, json_chunk));
  					++i;
  				}
  				else if (cgltf_json_strcmp(tokens+i, json_chunk, "byteOffset") == 0)
  				{
  					++i;
  					out_sparse->values_byte_offset = cgltf_json_to_int(tokens + i, json_chunk);
  					++i;
  				}
  				else if (cgltf_json_strcmp(tokens + i, json_chunk, "extras") == 0)
  				{
  					i = cgltf_parse_json_extras(tokens, i + 1, json_chunk, &out_sparse->values_extras);
  				}
  				else if (cgltf_json_strcmp(tokens + i, json_chunk, "extensions") == 0)
  				{
  					i = cgltf_parse_json_unprocessed_extensions(options, tokens, i, json_chunk, &out_sparse->values_extensions_count, &out_sparse->values_extensions);
  				}
  				else
  				{
  					i = cgltf_skip_json(tokens, i+1);
  				}
  
  				if (i < 0)
  				{
  					return i;
  				}
  			}
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "extras") == 0)
  		{
  			i = cgltf_parse_json_extras(tokens, i + 1, json_chunk, &out_sparse->extras);
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "extensions") == 0)
  		{
  			i = cgltf_parse_json_unprocessed_extensions(options, tokens, i, json_chunk, &out_sparse->extensions_count, &out_sparse->extensions);
  		}
  		else
  		{
  			i = cgltf_skip_json(tokens, i+1);
  		}
  
  		if (i < 0)
  		{
  			return i;
  		}
  	}
  
  	return i;
  }
  
  static int cgltf_parse_json_accessor(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_accessor* out_accessor)
  {
  	CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
  
  	int size = tokens[i].size;
  	++i;
  
  	for (int j = 0; j < size; ++j)
  	{
  		CGLTF_CHECK_KEY(tokens[i]);
  
  		if (cgltf_json_strcmp(tokens+i, json_chunk, "bufferView") == 0)
  		{
  			++i;
  			out_accessor->buffer_view = CGLTF_PTRINDEX(cgltf_buffer_view, cgltf_json_to_int(tokens + i, json_chunk));
  			++i;
  		}
  		else if (cgltf_json_strcmp(tokens+i, json_chunk, "byteOffset") == 0)
  		{
  			++i;
  			out_accessor->offset =
  					cgltf_json_to_int(tokens+i, json_chunk);
  			++i;
  		}
  		else if (cgltf_json_strcmp(tokens+i, json_chunk, "componentType") == 0)
  		{
  			++i;
  			out_accessor->component_type = cgltf_json_to_component_type(tokens + i, json_chunk);
  			++i;
  		}
  		else if (cgltf_json_strcmp(tokens+i, json_chunk, "normalized") == 0)
  		{
  			++i;
  			out_accessor->normalized = cgltf_json_to_bool(tokens+i, json_chunk);
  			++i;
  		}
  		else if (cgltf_json_strcmp(tokens+i, json_chunk, "count") == 0)
  		{
  			++i;
  			out_accessor->count =
  					cgltf_json_to_int(tokens+i, json_chunk);
  			++i;
  		}
  		else if (cgltf_json_strcmp(tokens+i, json_chunk, "type") == 0)
  		{
  			++i;
  			if (cgltf_json_strcmp(tokens+i, json_chunk, "SCALAR") == 0)
  			{
  				out_accessor->type = cgltf_type_scalar;
  			}
  			else if (cgltf_json_strcmp(tokens+i, json_chunk, "VEC2") == 0)
  			{
  				out_accessor->type = cgltf_type_vec2;
  			}
  			else if (cgltf_json_strcmp(tokens+i, json_chunk, "VEC3") == 0)
  			{
  				out_accessor->type = cgltf_type_vec3;
  			}
  			else if (cgltf_json_strcmp(tokens+i, json_chunk, "VEC4") == 0)
  			{
  				out_accessor->type = cgltf_type_vec4;
  			}
  			else if (cgltf_json_strcmp(tokens+i, json_chunk, "MAT2") == 0)
  			{
  				out_accessor->type = cgltf_type_mat2;
  			}
  			else if (cgltf_json_strcmp(tokens+i, json_chunk, "MAT3") == 0)
  			{
  				out_accessor->type = cgltf_type_mat3;
  			}
  			else if (cgltf_json_strcmp(tokens+i, json_chunk, "MAT4") == 0)
  			{
  				out_accessor->type = cgltf_type_mat4;
  			}
  			++i;
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "min") == 0)
  		{
  			++i;
  			out_accessor->has_min = 1;
  			// note: we can't parse the precise number of elements since type may not have been computed yet
  			int min_size = tokens[i].size > 16 ? 16 : tokens[i].size;
  			i = cgltf_parse_json_float_array(tokens, i, json_chunk, out_accessor->min, min_size);
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "max") == 0)
  		{
  			++i;
  			out_accessor->has_max = 1;
  			// note: we can't parse the precise number of elements since type may not have been computed yet
  			int max_size = tokens[i].size > 16 ? 16 : tokens[i].size;
  			i = cgltf_parse_json_float_array(tokens, i, json_chunk, out_accessor->max, max_size);
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "sparse") == 0)
  		{
  			out_accessor->is_sparse = 1;
  			i = cgltf_parse_json_accessor_sparse(options, tokens, i + 1, json_chunk, &out_accessor->sparse);
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "extras") == 0)
  		{
  			i = cgltf_parse_json_extras(tokens, i + 1, json_chunk, &out_accessor->extras);
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "extensions") == 0)
  		{
  			i = cgltf_parse_json_unprocessed_extensions(options, tokens, i, json_chunk, &out_accessor->extensions_count, &out_accessor->extensions);
  		}
  		else
  		{
  			i = cgltf_skip_json(tokens, i+1);
  		}
  
  		if (i < 0)
  		{
  			return i;
  		}
  	}
  
  	return i;
  }
  
  static int cgltf_parse_json_texture_transform(jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_texture_transform* out_texture_transform)
  {
  	CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
  
  	int size = tokens[i].size;
  	++i;
  
  	for (int j = 0; j < size; ++j)
  	{
  		CGLTF_CHECK_KEY(tokens[i]);
  
  		if (cgltf_json_strcmp(tokens + i, json_chunk, "offset") == 0)
  		{
  			i = cgltf_parse_json_float_array(tokens, i + 1, json_chunk, out_texture_transform->offset, 2);
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "rotation") == 0)
  		{
  			++i;
  			out_texture_transform->rotation = cgltf_json_to_float(tokens + i, json_chunk);
  			++i;
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "scale") == 0)
  		{
  			i = cgltf_parse_json_float_array(tokens, i + 1, json_chunk, out_texture_transform->scale, 2);
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "texCoord") == 0)
  		{
  			++i;
  			out_texture_transform->texcoord = cgltf_json_to_int(tokens + i, json_chunk);
  			++i;
  		}
  		else
  		{
  			i = cgltf_skip_json(tokens, i + 1);
  		}
  
  		if (i < 0)
  		{
  			return i;
  		}
  	}
  
  	return i;
  }
  
  static int cgltf_parse_json_texture_view(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_texture_view* out_texture_view)
  {
  	CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
  
  	out_texture_view->scale = 1.0f;
  	cgltf_fill_float_array(out_texture_view->transform.scale, 2, 1.0f);
  
  	int size = tokens[i].size;
  	++i;
  
  	for (int j = 0; j < size; ++j)
  	{
  		CGLTF_CHECK_KEY(tokens[i]);
  
  		if (cgltf_json_strcmp(tokens + i, json_chunk, "index") == 0)
  		{
  			++i;
  			out_texture_view->texture = CGLTF_PTRINDEX(cgltf_texture, cgltf_json_to_int(tokens + i, json_chunk));
  			++i;
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "texCoord") == 0)
  		{
  			++i;
  			out_texture_view->texcoord = cgltf_json_to_int(tokens + i, json_chunk);
  			++i;
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "scale") == 0) 
  		{
  			++i;
  			out_texture_view->scale = cgltf_json_to_float(tokens + i, json_chunk);
  			++i;
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "strength") == 0)
  		{
  			++i;
  			out_texture_view->scale = cgltf_json_to_float(tokens + i, json_chunk);
  			++i;
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "extras") == 0)
  		{
  			i = cgltf_parse_json_extras(tokens, i + 1, json_chunk, &out_texture_view->extras);
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "extensions") == 0)
  		{
  			++i;
  
  			CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
  			if(out_texture_view->extensions)
  			{
  				return CGLTF_ERROR_JSON;
  			}
  
  			int extensions_size = tokens[i].size;
  			out_texture_view->extensions_count = 0;
  			out_texture_view->extensions = (cgltf_extension*)cgltf_calloc(options, sizeof(cgltf_extension), extensions_size);
  
  			if (!out_texture_view->extensions)
  			{
  				return CGLTF_ERROR_NOMEM;
  			}
  
  			++i;
  
  			for (int k = 0; k < extensions_size; ++k)
  			{
  				CGLTF_CHECK_KEY(tokens[i]);
  
  				if (cgltf_json_strcmp(tokens+i, json_chunk, "KHR_texture_transform") == 0)
  				{
  					out_texture_view->has_transform = 1;
  					i = cgltf_parse_json_texture_transform(tokens, i + 1, json_chunk, &out_texture_view->transform);
  				}
  				else
  				{
  					i = cgltf_parse_json_unprocessed_extension(options, tokens, i, json_chunk, &(out_texture_view->extensions[out_texture_view->extensions_count++]));
  				}
  
  				if (i < 0)
  				{
  					return i;
  				}
  			}
  		}
  		else
  		{
  			i = cgltf_skip_json(tokens, i + 1);
  		}
  
  		if (i < 0)
  		{
  			return i;
  		}
  	}
  
  	return i;
  }
  
  static int cgltf_parse_json_pbr_metallic_roughness(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_pbr_metallic_roughness* out_pbr)
  {
  	CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
  
  	int size = tokens[i].size;
  	++i;
  
  	for (int j = 0; j < size; ++j)
  	{
  		CGLTF_CHECK_KEY(tokens[i]);
  
  		if (cgltf_json_strcmp(tokens+i, json_chunk, "metallicFactor") == 0)
  		{
  			++i;
  			out_pbr->metallic_factor = 
  				cgltf_json_to_float(tokens + i, json_chunk);
  			++i;
  		}
  		else if (cgltf_json_strcmp(tokens+i, json_chunk, "roughnessFactor") == 0) 
  		{
  			++i;
  			out_pbr->roughness_factor =
  				cgltf_json_to_float(tokens+i, json_chunk);
  			++i;
  		}
  		else if (cgltf_json_strcmp(tokens+i, json_chunk, "baseColorFactor") == 0)
  		{
  			i = cgltf_parse_json_float_array(tokens, i + 1, json_chunk, out_pbr->base_color_factor, 4);
  		}
  		else if (cgltf_json_strcmp(tokens+i, json_chunk, "baseColorTexture") == 0)
  		{
  			i = cgltf_parse_json_texture_view(options, tokens, i + 1, json_chunk,
  				&out_pbr->base_color_texture);
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "metallicRoughnessTexture") == 0)
  		{
  			i = cgltf_parse_json_texture_view(options, tokens, i + 1, json_chunk,
  				&out_pbr->metallic_roughness_texture);
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "extras") == 0)
  		{
  			i = cgltf_parse_json_extras(tokens, i + 1, json_chunk, &out_pbr->extras);
  		}
  		else
  		{
  			i = cgltf_skip_json(tokens, i+1);
  		}
  
  		if (i < 0)
  		{
  			return i;
  		}
  	}
  
  	return i;
  }
  
  static int cgltf_parse_json_pbr_specular_glossiness(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_pbr_specular_glossiness* out_pbr)
  {
  	CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
  	int size = tokens[i].size;
  	++i;
  
  	for (int j = 0; j < size; ++j)
  	{
  		CGLTF_CHECK_KEY(tokens[i]);
  
  		if (cgltf_json_strcmp(tokens+i, json_chunk, "diffuseFactor") == 0)
  		{
  			i = cgltf_parse_json_float_array(tokens, i + 1, json_chunk, out_pbr->diffuse_factor, 4);
  		}
  		else if (cgltf_json_strcmp(tokens+i, json_chunk, "specularFactor") == 0)
  		{
  			i = cgltf_parse_json_float_array(tokens, i + 1, json_chunk, out_pbr->specular_factor, 3);
  		}
  		else if (cgltf_json_strcmp(tokens+i, json_chunk, "glossinessFactor") == 0)
  		{
  			++i;
  			out_pbr->glossiness_factor = cgltf_json_to_float(tokens + i, json_chunk);
  			++i;
  		}
  		else if (cgltf_json_strcmp(tokens+i, json_chunk, "diffuseTexture") == 0)
  		{
  			i = cgltf_parse_json_texture_view(options, tokens, i + 1, json_chunk, &out_pbr->diffuse_texture);
  		}
  		else if (cgltf_json_strcmp(tokens+i, json_chunk, "specularGlossinessTexture") == 0)
  		{
  			i = cgltf_parse_json_texture_view(options, tokens, i + 1, json_chunk, &out_pbr->specular_glossiness_texture);
  		}
  		else
  		{
  			i = cgltf_skip_json(tokens, i+1);
  		}
  
  		if (i < 0)
  		{
  			return i;
  		}
  	}
  
  	return i;
  }
  
  static int cgltf_parse_json_clearcoat(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_clearcoat* out_clearcoat)
  {
  	CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
  	int size = tokens[i].size;
  	++i;
  
  	for (int j = 0; j < size; ++j)
  	{
  		CGLTF_CHECK_KEY(tokens[i]);
  
  		if (cgltf_json_strcmp(tokens+i, json_chunk, "clearcoatFactor") == 0)
  		{
  			++i;
  			out_clearcoat->clearcoat_factor = cgltf_json_to_float(tokens + i, json_chunk);
  			++i;
  		}
  		else if (cgltf_json_strcmp(tokens+i, json_chunk, "clearcoatRoughnessFactor") == 0)
  		{
  			++i;
  			out_clearcoat->clearcoat_roughness_factor = cgltf_json_to_float(tokens + i, json_chunk);
  			++i;
  		}
  		else if (cgltf_json_strcmp(tokens+i, json_chunk, "clearcoatTexture") == 0)
  		{
  			i = cgltf_parse_json_texture_view(options, tokens, i + 1, json_chunk, &out_clearcoat->clearcoat_texture);
  		}
  		else if (cgltf_json_strcmp(tokens+i, json_chunk, "clearcoatRoughnessTexture") == 0)
  		{
  			i = cgltf_parse_json_texture_view(options, tokens, i + 1, json_chunk, &out_clearcoat->clearcoat_roughness_texture);
  		}
  		else if (cgltf_json_strcmp(tokens+i, json_chunk, "clearcoatNormalTexture") == 0)
  		{
  			i = cgltf_parse_json_texture_view(options, tokens, i + 1, json_chunk, &out_clearcoat->clearcoat_normal_texture);
  		}
  		else
  		{
  			i = cgltf_skip_json(tokens, i+1);
  		}
  
  		if (i < 0)
  		{
  			return i;
  		}
  	}
  
  	return i;
  }
  
  static int cgltf_parse_json_ior(jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_ior* out_ior)
  {
  	CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
  	int size = tokens[i].size;
  	++i;
  
  	// Default values
  	out_ior->ior = 1.5f;
  
  	for (int j = 0; j < size; ++j)
  	{
  		CGLTF_CHECK_KEY(tokens[i]);
  
  		if (cgltf_json_strcmp(tokens+i, json_chunk, "ior") == 0)
  		{
  			++i;
  			out_ior->ior = cgltf_json_to_float(tokens + i, json_chunk);
  			++i;
  		}
  		else
  		{
  			i = cgltf_skip_json(tokens, i+1);
  		}
  
  		if (i < 0)
  		{
  			return i;
  		}
  	}
  
  	return i;
  }
  
  static int cgltf_parse_json_specular(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_specular* out_specular)
  {
  	CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
  	int size = tokens[i].size;
  	++i;
  
  	// Default values
  	out_specular->specular_factor = 1.0f;
  	cgltf_fill_float_array(out_specular->specular_color_factor, 3, 1.0f);
  
  	for (int j = 0; j < size; ++j)
  	{
  		CGLTF_CHECK_KEY(tokens[i]);
  
  		if (cgltf_json_strcmp(tokens+i, json_chunk, "specularFactor") == 0)
  		{
  			++i;
  			out_specular->specular_factor = cgltf_json_to_float(tokens + i, json_chunk);
  			++i;
  		}
  		else if (cgltf_json_strcmp(tokens+i, json_chunk, "specularColorFactor") == 0)
  		{
  			i = cgltf_parse_json_float_array(tokens, i + 1, json_chunk, out_specular->specular_color_factor, 3);
  		}
  		else if (cgltf_json_strcmp(tokens+i, json_chunk, "specularTexture") == 0)
  		{
  			i = cgltf_parse_json_texture_view(options, tokens, i + 1, json_chunk, &out_specular->specular_texture);
  		}
  		else
  		{
  			i = cgltf_skip_json(tokens, i+1);
  		}
  
  		if (i < 0)
  		{
  			return i;
  		}
  	}
  
  	return i;
  }
  
  static int cgltf_parse_json_transmission(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_transmission* out_transmission)
  {
  	CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
  	int size = tokens[i].size;
  	++i;
  
  	for (int j = 0; j < size; ++j)
  	{
  		CGLTF_CHECK_KEY(tokens[i]);
  
  		if (cgltf_json_strcmp(tokens+i, json_chunk, "transmissionFactor") == 0)
  		{
  			++i;
  			out_transmission->transmission_factor = cgltf_json_to_float(tokens + i, json_chunk);
  			++i;
  		}
  		else if (cgltf_json_strcmp(tokens+i, json_chunk, "transmissionTexture") == 0)
  		{
  			i = cgltf_parse_json_texture_view(options, tokens, i + 1, json_chunk, &out_transmission->transmission_texture);
  		}
  		else
  		{
  			i = cgltf_skip_json(tokens, i+1);
  		}
  
  		if (i < 0)
  		{
  			return i;
  		}
  	}
  
  	return i;
  }
  
  static int cgltf_parse_json_image(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_image* out_image)
  {
  	CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
  
  	int size = tokens[i].size;
  	++i;
  
  	for (int j = 0; j < size; ++j) 
  	{
  		CGLTF_CHECK_KEY(tokens[i]);
  
  		if (cgltf_json_strcmp(tokens + i, json_chunk, "uri") == 0) 
  		{
  			i = cgltf_parse_json_string(options, tokens, i + 1, json_chunk, &out_image->uri);
  		}
  		else if (cgltf_json_strcmp(tokens+i, json_chunk, "bufferView") == 0)
  		{
  			++i;
  			out_image->buffer_view = CGLTF_PTRINDEX(cgltf_buffer_view, cgltf_json_to_int(tokens + i, json_chunk));
  			++i;
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "mimeType") == 0)
  		{
  			i = cgltf_parse_json_string(options, tokens, i + 1, json_chunk, &out_image->mime_type);
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "name") == 0)
  		{
  			i = cgltf_parse_json_string(options, tokens, i + 1, json_chunk, &out_image->name);
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "extras") == 0)
  		{
  			i = cgltf_parse_json_extras(tokens, i + 1, json_chunk, &out_image->extras);
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "extensions") == 0)
  		{
  			i = cgltf_parse_json_unprocessed_extensions(options, tokens, i, json_chunk, &out_image->extensions_count, &out_image->extensions);
  		}
  		else
  		{
  			i = cgltf_skip_json(tokens, i + 1);
  		}
  
  		if (i < 0)
  		{
  			return i;
  		}
  	}
  
  	return i;
  }
  
  static int cgltf_parse_json_sampler(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_sampler* out_sampler)
  {
  	(void)options;
  	CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
  
  	out_sampler->wrap_s = 10497;
  	out_sampler->wrap_t = 10497;
  
  	int size = tokens[i].size;
  	++i;
  
  	for (int j = 0; j < size; ++j)
  	{
  		CGLTF_CHECK_KEY(tokens[i]);
  
  		if (cgltf_json_strcmp(tokens + i, json_chunk, "magFilter") == 0) 
  		{
  			++i;
  			out_sampler->mag_filter
  				= cgltf_json_to_int(tokens + i, json_chunk);
  			++i;
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "minFilter") == 0)
  		{
  			++i;
  			out_sampler->min_filter
  				= cgltf_json_to_int(tokens + i, json_chunk);
  			++i;
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "wrapS") == 0)
  		{
  			++i;
  			out_sampler->wrap_s
  				= cgltf_json_to_int(tokens + i, json_chunk);
  			++i;
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "wrapT") == 0) 
  		{
  			++i;
  			out_sampler->wrap_t
  				= cgltf_json_to_int(tokens + i, json_chunk);
  			++i;
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "extras") == 0)
  		{
  			i = cgltf_parse_json_extras(tokens, i + 1, json_chunk, &out_sampler->extras);
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "extensions") == 0)
  		{
  			i = cgltf_parse_json_unprocessed_extensions(options, tokens, i, json_chunk, &out_sampler->extensions_count, &out_sampler->extensions);
  		}
  		else
  		{
  			i = cgltf_skip_json(tokens, i + 1);
  		}
  
  		if (i < 0)
  		{
  			return i;
  		}
  	}
  
  	return i;
  }
  
  static int cgltf_parse_json_texture(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_texture* out_texture)
  {
  	CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
  
  	int size = tokens[i].size;
  	++i;
  
  	for (int j = 0; j < size; ++j)
  	{
  		CGLTF_CHECK_KEY(tokens[i]);
  
  		if (cgltf_json_strcmp(tokens+i, json_chunk, "name") == 0)
  		{
  			i = cgltf_parse_json_string(options, tokens, i + 1, json_chunk, &out_texture->name);
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "sampler") == 0)
  		{
  			++i;
  			out_texture->sampler = CGLTF_PTRINDEX(cgltf_sampler, cgltf_json_to_int(tokens + i, json_chunk));
  			++i;
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "source") == 0) 
  		{
  			++i;
  			out_texture->image = CGLTF_PTRINDEX(cgltf_image, cgltf_json_to_int(tokens + i, json_chunk));
  			++i;
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "extras") == 0)
  		{
  			i = cgltf_parse_json_extras(tokens, i + 1, json_chunk, &out_texture->extras);
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "extensions") == 0)
  		{
  			i = cgltf_parse_json_unprocessed_extensions(options, tokens, i, json_chunk, &out_texture->extensions_count, &out_texture->extensions);
  		}
  		else
  		{
  			i = cgltf_skip_json(tokens, i + 1);
  		}
  
  		if (i < 0)
  		{
  			return i;
  		}
  	}
  
  	return i;
  }
  
  static int cgltf_parse_json_material(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_material* out_material)
  {
  	CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
  
  	cgltf_fill_float_array(out_material->pbr_metallic_roughness.base_color_factor, 4, 1.0f);
  	out_material->pbr_metallic_roughness.metallic_factor = 1.0f;
  	out_material->pbr_metallic_roughness.roughness_factor = 1.0f;
  
  	cgltf_fill_float_array(out_material->pbr_specular_glossiness.diffuse_factor, 4, 1.0f);
  	cgltf_fill_float_array(out_material->pbr_specular_glossiness.specular_factor, 3, 1.0f);
  	out_material->pbr_specular_glossiness.glossiness_factor = 1.0f;
  
  	out_material->alpha_cutoff = 0.5f;
  
  	int size = tokens[i].size;
  	++i;
  
  	for (int j = 0; j < size; ++j)
  	{
  		CGLTF_CHECK_KEY(tokens[i]);
  
  		if (cgltf_json_strcmp(tokens+i, json_chunk, "name") == 0)
  		{
  			i = cgltf_parse_json_string(options, tokens, i + 1, json_chunk, &out_material->name);
  		}
  		else if (cgltf_json_strcmp(tokens+i, json_chunk, "pbrMetallicRoughness") == 0)
  		{
  			out_material->has_pbr_metallic_roughness = 1;
  			i = cgltf_parse_json_pbr_metallic_roughness(options, tokens, i + 1, json_chunk, &out_material->pbr_metallic_roughness);
  		}
  		else if (cgltf_json_strcmp(tokens+i, json_chunk, "emissiveFactor") == 0)
  		{
  			i = cgltf_parse_json_float_array(tokens, i + 1, json_chunk, out_material->emissive_factor, 3);
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "normalTexture") == 0)
  		{
  			i = cgltf_parse_json_texture_view(options, tokens, i + 1, json_chunk,
  				&out_material->normal_texture);
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "occlusionTexture") == 0)
  		{
  			i = cgltf_parse_json_texture_view(options, tokens, i + 1, json_chunk,
  				&out_material->occlusion_texture);
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "emissiveTexture") == 0)
  		{
  			i = cgltf_parse_json_texture_view(options, tokens, i + 1, json_chunk,
  				&out_material->emissive_texture);
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "alphaMode") == 0)
  		{
  			++i;
  			if (cgltf_json_strcmp(tokens + i, json_chunk, "OPAQUE") == 0)
  			{
  				out_material->alpha_mode = cgltf_alpha_mode_opaque;
  			}
  			else if (cgltf_json_strcmp(tokens + i, json_chunk, "MASK") == 0)
  			{
  				out_material->alpha_mode = cgltf_alpha_mode_mask;
  			}
  			else if (cgltf_json_strcmp(tokens + i, json_chunk, "BLEND") == 0)
  			{
  				out_material->alpha_mode = cgltf_alpha_mode_blend;
  			}
  			++i;
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "alphaCutoff") == 0)
  		{
  			++i;
  			out_material->alpha_cutoff = cgltf_json_to_float(tokens + i, json_chunk);
  			++i;
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "doubleSided") == 0)
  		{
  			++i;
  			out_material->double_sided =
  				cgltf_json_to_bool(tokens + i, json_chunk);
  			++i;
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "extras") == 0)
  		{
  			i = cgltf_parse_json_extras(tokens, i + 1, json_chunk, &out_material->extras);
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "extensions") == 0)
  		{
  			++i;
  
  			CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
  			if(out_material->extensions)
  			{
  				return CGLTF_ERROR_JSON;
  			}
  
  			int extensions_size = tokens[i].size;
  			++i;
  			out_material->extensions = (cgltf_extension*)cgltf_calloc(options, sizeof(cgltf_extension), extensions_size);
  			out_material->extensions_count= 0;
  
  			if (!out_material->extensions)
  			{
  				return CGLTF_ERROR_NOMEM;
  			}
  
  			for (int k = 0; k < extensions_size; ++k)
  			{
  				CGLTF_CHECK_KEY(tokens[i]);
  
  				if (cgltf_json_strcmp(tokens+i, json_chunk, "KHR_materials_pbrSpecularGlossiness") == 0)
  				{
  					out_material->has_pbr_specular_glossiness = 1;
  					i = cgltf_parse_json_pbr_specular_glossiness(options, tokens, i + 1, json_chunk, &out_material->pbr_specular_glossiness);
  				}
  				else if (cgltf_json_strcmp(tokens+i, json_chunk, "KHR_materials_unlit") == 0)
  				{
  					out_material->unlit = 1;
  					i = cgltf_skip_json(tokens, i+1);
  				}
  				else if (cgltf_json_strcmp(tokens+i, json_chunk, "KHR_materials_clearcoat") == 0)
  				{
  					out_material->has_clearcoat = 1;
  					i = cgltf_parse_json_clearcoat(options, tokens, i + 1, json_chunk, &out_material->clearcoat);
  				}
  				else if (cgltf_json_strcmp(tokens+i, json_chunk, "KHR_materials_ior") == 0)
  				{
  					out_material->has_ior = 1;
  					i = cgltf_parse_json_ior(tokens, i + 1, json_chunk, &out_material->ior);
  				}
  				else if (cgltf_json_strcmp(tokens+i, json_chunk, "KHR_materials_specular") == 0)
  				{
  					out_material->has_specular = 1;
  					i = cgltf_parse_json_specular(options, tokens, i + 1, json_chunk, &out_material->specular);
  				}
  				else if (cgltf_json_strcmp(tokens+i, json_chunk, "KHR_materials_transmission") == 0)
  				{
  					out_material->has_transmission = 1;
  					i = cgltf_parse_json_transmission(options, tokens, i + 1, json_chunk, &out_material->transmission);
  				}
  				else
  				{
  					i = cgltf_parse_json_unprocessed_extension(options, tokens, i, json_chunk, &(out_material->extensions[out_material->extensions_count++]));
  				}
  
  				if (i < 0)
  				{
  					return i;
  				}
  			}
  		}
  		else
  		{
  			i = cgltf_skip_json(tokens, i+1);
  		}
  
  		if (i < 0)
  		{
  			return i;
  		}
  	}
  
  	return i;
  }
  
  static int cgltf_parse_json_accessors(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_data* out_data)
  {
  	i = cgltf_parse_json_array(options, tokens, i, json_chunk, sizeof(cgltf_accessor), (void**)&out_data->accessors, &out_data->accessors_count);
  	if (i < 0)
  	{
  		return i;
  	}
  
  	for (cgltf_size j = 0; j < out_data->accessors_count; ++j)
  	{
  		i = cgltf_parse_json_accessor(options, tokens, i, json_chunk, &out_data->accessors[j]);
  		if (i < 0)
  		{
  			return i;
  		}
  	}
  	return i;
  }
  
  static int cgltf_parse_json_materials(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_data* out_data)
  {
  	i = cgltf_parse_json_array(options, tokens, i, json_chunk, sizeof(cgltf_material), (void**)&out_data->materials, &out_data->materials_count);
  	if (i < 0)
  	{
  		return i;
  	}
  
  	for (cgltf_size j = 0; j < out_data->materials_count; ++j)
  	{
  		i = cgltf_parse_json_material(options, tokens, i, json_chunk, &out_data->materials[j]);
  		if (i < 0)
  		{
  			return i;
  		}
  	}
  	return i;
  }
  
  static int cgltf_parse_json_images(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_data* out_data)
  {
  	i = cgltf_parse_json_array(options, tokens, i, json_chunk, sizeof(cgltf_image), (void**)&out_data->images, &out_data->images_count);
  	if (i < 0)
  	{
  		return i;
  	}
  
  	for (cgltf_size j = 0; j < out_data->images_count; ++j)
  	{
  		i = cgltf_parse_json_image(options, tokens, i, json_chunk, &out_data->images[j]);
  		if (i < 0)
  		{
  			return i;
  		}
  	}
  	return i;
  }
  
  static int cgltf_parse_json_textures(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_data* out_data)
  {
  	i = cgltf_parse_json_array(options, tokens, i, json_chunk, sizeof(cgltf_texture), (void**)&out_data->textures, &out_data->textures_count);
  	if (i < 0)
  	{
  		return i;
  	}
  
  	for (cgltf_size j = 0; j < out_data->textures_count; ++j)
  	{
  		i = cgltf_parse_json_texture(options, tokens, i, json_chunk, &out_data->textures[j]);
  		if (i < 0)
  		{
  			return i;
  		}
  	}
  	return i;
  }
  
  static int cgltf_parse_json_samplers(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_data* out_data)
  {
  	i = cgltf_parse_json_array(options, tokens, i, json_chunk, sizeof(cgltf_sampler), (void**)&out_data->samplers, &out_data->samplers_count);
  	if (i < 0)
  	{
  		return i;
  	}
  
  	for (cgltf_size j = 0; j < out_data->samplers_count; ++j)
  	{
  		i = cgltf_parse_json_sampler(options, tokens, i, json_chunk, &out_data->samplers[j]);
  		if (i < 0)
  		{
  			return i;
  		}
  	}
  	return i;
  }
  
  static int cgltf_parse_json_buffer_view(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_buffer_view* out_buffer_view)
  {
  	CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
  
  	int size = tokens[i].size;
  	++i;
  
  	for (int j = 0; j < size; ++j)
  	{
  		CGLTF_CHECK_KEY(tokens[i]);
  
  		if (cgltf_json_strcmp(tokens+i, json_chunk, "buffer") == 0)
  		{
  			++i;
  			out_buffer_view->buffer = CGLTF_PTRINDEX(cgltf_buffer, cgltf_json_to_int(tokens + i, json_chunk));
  			++i;
  		}
  		else if (cgltf_json_strcmp(tokens+i, json_chunk, "byteOffset") == 0)
  		{
  			++i;
  			out_buffer_view->offset =
  					cgltf_json_to_int(tokens+i, json_chunk);
  			++i;
  		}
  		else if (cgltf_json_strcmp(tokens+i, json_chunk, "byteLength") == 0)
  		{
  			++i;
  			out_buffer_view->size =
  					cgltf_json_to_int(tokens+i, json_chunk);
  			++i;
  		}
  		else if (cgltf_json_strcmp(tokens+i, json_chunk, "byteStride") == 0)
  		{
  			++i;
  			out_buffer_view->stride =
  					cgltf_json_to_int(tokens+i, json_chunk);
  			++i;
  		}
  		else if (cgltf_json_strcmp(tokens+i, json_chunk, "target") == 0)
  		{
  			++i;
  			int type = cgltf_json_to_int(tokens+i, json_chunk);
  			switch (type)
  			{
  			case 34962:
  				type = cgltf_buffer_view_type_vertices;
  				break;
  			case 34963:
  				type = cgltf_buffer_view_type_indices;
  				break;
  			default:
  				type = cgltf_buffer_view_type_invalid;
  				break;
  			}
  			out_buffer_view->type = (cgltf_buffer_view_type)type;
  			++i;
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "extras") == 0)
  		{
  			i = cgltf_parse_json_extras(tokens, i + 1, json_chunk, &out_buffer_view->extras);
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "extensions") == 0)
  		{
  			i = cgltf_parse_json_unprocessed_extensions(options, tokens, i, json_chunk, &out_buffer_view->extensions_count, &out_buffer_view->extensions);
  		}
  		else
  		{
  			i = cgltf_skip_json(tokens, i+1);
  		}
  
  		if (i < 0)
  		{
  			return i;
  		}
  	}
  
  	return i;
  }
  
  static int cgltf_parse_json_buffer_views(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_data* out_data)
  {
  	i = cgltf_parse_json_array(options, tokens, i, json_chunk, sizeof(cgltf_buffer_view), (void**)&out_data->buffer_views, &out_data->buffer_views_count);
  	if (i < 0)
  	{
  		return i;
  	}
  
  	for (cgltf_size j = 0; j < out_data->buffer_views_count; ++j)
  	{
  		i = cgltf_parse_json_buffer_view(options, tokens, i, json_chunk, &out_data->buffer_views[j]);
  		if (i < 0)
  		{
  			return i;
  		}
  	}
  	return i;
  }
  
  static int cgltf_parse_json_buffer(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_buffer* out_buffer)
  {
  	CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
  
  	int size = tokens[i].size;
  	++i;
  
  	for (int j = 0; j < size; ++j)
  	{
  		CGLTF_CHECK_KEY(tokens[i]);
  
  		if (cgltf_json_strcmp(tokens+i, json_chunk, "byteLength") == 0)
  		{
  			++i;
  			out_buffer->size =
  					cgltf_json_to_int(tokens+i, json_chunk);
  			++i;
  		}
  		else if (cgltf_json_strcmp(tokens+i, json_chunk, "uri") == 0)
  		{
  			i = cgltf_parse_json_string(options, tokens, i + 1, json_chunk, &out_buffer->uri);
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "extras") == 0)
  		{
  			i = cgltf_parse_json_extras(tokens, i + 1, json_chunk, &out_buffer->extras);
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "extensions") == 0)
  		{
  			i = cgltf_parse_json_unprocessed_extensions(options, tokens, i, json_chunk, &out_buffer->extensions_count, &out_buffer->extensions);
  		}
  		else
  		{
  			i = cgltf_skip_json(tokens, i+1);
  		}
  
  		if (i < 0)
  		{
  			return i;
  		}
  	}
  
  	return i;
  }
  
  static int cgltf_parse_json_buffers(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_data* out_data)
  {
  	i = cgltf_parse_json_array(options, tokens, i, json_chunk, sizeof(cgltf_buffer), (void**)&out_data->buffers, &out_data->buffers_count);
  	if (i < 0)
  	{
  		return i;
  	}
  
  	for (cgltf_size j = 0; j < out_data->buffers_count; ++j)
  	{
  		i = cgltf_parse_json_buffer(options, tokens, i, json_chunk, &out_data->buffers[j]);
  		if (i < 0)
  		{
  			return i;
  		}
  	}
  	return i;
  }
  
  static int cgltf_parse_json_skin(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_skin* out_skin)
  {
  	CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
  
  	int size = tokens[i].size;
  	++i;
  
  	for (int j = 0; j < size; ++j)
  	{
  		CGLTF_CHECK_KEY(tokens[i]);
  
  		if (cgltf_json_strcmp(tokens+i, json_chunk, "name") == 0)
  		{
  			i = cgltf_parse_json_string(options, tokens, i + 1, json_chunk, &out_skin->name);
  		}
  		else if (cgltf_json_strcmp(tokens+i, json_chunk, "joints") == 0)
  		{
  			i = cgltf_parse_json_array(options, tokens, i + 1, json_chunk, sizeof(cgltf_node*), (void**)&out_skin->joints, &out_skin->joints_count);
  			if (i < 0)
  			{
  				return i;
  			}
  
  			for (cgltf_size k = 0; k < out_skin->joints_count; ++k)
  			{
  				out_skin->joints[k] = CGLTF_PTRINDEX(cgltf_node, cgltf_json_to_int(tokens + i, json_chunk));
  				++i;
  			}
  		}
  		else if (cgltf_json_strcmp(tokens+i, json_chunk, "skeleton") == 0)
  		{
  			++i;
  			CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_PRIMITIVE);
  			out_skin->skeleton = CGLTF_PTRINDEX(cgltf_node, cgltf_json_to_int(tokens + i, json_chunk));
  			++i;
  		}
  		else if (cgltf_json_strcmp(tokens+i, json_chunk, "inverseBindMatrices") == 0)
  		{
  			++i;
  			CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_PRIMITIVE);
  			out_skin->inverse_bind_matrices = CGLTF_PTRINDEX(cgltf_accessor, cgltf_json_to_int(tokens + i, json_chunk));
  			++i;
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "extras") == 0)
  		{
  			i = cgltf_parse_json_extras(tokens, i + 1, json_chunk, &out_skin->extras);
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "extensions") == 0)
  		{
  			i = cgltf_parse_json_unprocessed_extensions(options, tokens, i, json_chunk, &out_skin->extensions_count, &out_skin->extensions);
  		}
  		else
  		{
  			i = cgltf_skip_json(tokens, i+1);
  		}
  
  		if (i < 0)
  		{
  			return i;
  		}
  	}
  
  	return i;
  }
  
  static int cgltf_parse_json_skins(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_data* out_data)
  {
  	i = cgltf_parse_json_array(options, tokens, i, json_chunk, sizeof(cgltf_skin), (void**)&out_data->skins, &out_data->skins_count);
  	if (i < 0)
  	{
  		return i;
  	}
  
  	for (cgltf_size j = 0; j < out_data->skins_count; ++j)
  	{
  		i = cgltf_parse_json_skin(options, tokens, i, json_chunk, &out_data->skins[j]);
  		if (i < 0)
  		{
  			return i;
  		}
  	}
  	return i;
  }
  
  static int cgltf_parse_json_camera(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_camera* out_camera)
  {
  	CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
  
  	int size = tokens[i].size;
  	++i;
  
  	for (int j = 0; j < size; ++j)
  	{
  		CGLTF_CHECK_KEY(tokens[i]);
  
  		if (cgltf_json_strcmp(tokens+i, json_chunk, "name") == 0)
  		{
  			i = cgltf_parse_json_string(options, tokens, i + 1, json_chunk, &out_camera->name);
  		}
  		else if (cgltf_json_strcmp(tokens+i, json_chunk, "type") == 0)
  		{
  			++i;
  			if (cgltf_json_strcmp(tokens + i, json_chunk, "perspective") == 0)
  			{
  				out_camera->type = cgltf_camera_type_perspective;
  			}
  			else if (cgltf_json_strcmp(tokens + i, json_chunk, "orthographic") == 0)
  			{
  				out_camera->type = cgltf_camera_type_orthographic;
  			}
  			++i;
  		}
  		else if (cgltf_json_strcmp(tokens+i, json_chunk, "perspective") == 0)
  		{
  			++i;
  
  			CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
  
  			int data_size = tokens[i].size;
  			++i;
  
  			out_camera->type = cgltf_camera_type_perspective;
  
  			for (int k = 0; k < data_size; ++k)
  			{
  				CGLTF_CHECK_KEY(tokens[i]);
  
  				if (cgltf_json_strcmp(tokens+i, json_chunk, "aspectRatio") == 0)
  				{
  					++i;
  					out_camera->data.perspective.aspect_ratio = cgltf_json_to_float(tokens + i, json_chunk);
  					++i;
  				}
  				else if (cgltf_json_strcmp(tokens+i, json_chunk, "yfov") == 0)
  				{
  					++i;
  					out_camera->data.perspective.yfov = cgltf_json_to_float(tokens + i, json_chunk);
  					++i;
  				}
  				else if (cgltf_json_strcmp(tokens+i, json_chunk, "zfar") == 0)
  				{
  					++i;
  					out_camera->data.perspective.zfar = cgltf_json_to_float(tokens + i, json_chunk);
  					++i;
  				}
  				else if (cgltf_json_strcmp(tokens+i, json_chunk, "znear") == 0)
  				{
  					++i;
  					out_camera->data.perspective.znear = cgltf_json_to_float(tokens + i, json_chunk);
  					++i;
  				}
  				else if (cgltf_json_strcmp(tokens + i, json_chunk, "extras") == 0)
  				{
  					i = cgltf_parse_json_extras(tokens, i + 1, json_chunk, &out_camera->data.perspective.extras);
  				}
  				else
  				{
  					i = cgltf_skip_json(tokens, i+1);
  				}
  
  				if (i < 0)
  				{
  					return i;
  				}
  			}
  		}
  		else if (cgltf_json_strcmp(tokens+i, json_chunk, "orthographic") == 0)
  		{
  			++i;
  
  			CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
  
  			int data_size = tokens[i].size;
  			++i;
  
  			out_camera->type = cgltf_camera_type_orthographic;
  
  			for (int k = 0; k < data_size; ++k)
  			{
  				CGLTF_CHECK_KEY(tokens[i]);
  
  				if (cgltf_json_strcmp(tokens+i, json_chunk, "xmag") == 0)
  				{
  					++i;
  					out_camera->data.orthographic.xmag = cgltf_json_to_float(tokens + i, json_chunk);
  					++i;
  				}
  				else if (cgltf_json_strcmp(tokens+i, json_chunk, "ymag") == 0)
  				{
  					++i;
  					out_camera->data.orthographic.ymag = cgltf_json_to_float(tokens + i, json_chunk);
  					++i;
  				}
  				else if (cgltf_json_strcmp(tokens+i, json_chunk, "zfar") == 0)
  				{
  					++i;
  					out_camera->data.orthographic.zfar = cgltf_json_to_float(tokens + i, json_chunk);
  					++i;
  				}
  				else if (cgltf_json_strcmp(tokens+i, json_chunk, "znear") == 0)
  				{
  					++i;
  					out_camera->data.orthographic.znear = cgltf_json_to_float(tokens + i, json_chunk);
  					++i;
  				}
  				else if (cgltf_json_strcmp(tokens + i, json_chunk, "extras") == 0)
  				{
  					i = cgltf_parse_json_extras(tokens, i + 1, json_chunk, &out_camera->data.orthographic.extras);
  				}
  				else
  				{
  					i = cgltf_skip_json(tokens, i+1);
  				}
  
  				if (i < 0)
  				{
  					return i;
  				}
  			}
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "extras") == 0)
  		{
  			i = cgltf_parse_json_extras(tokens, i + 1, json_chunk, &out_camera->extras);
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "extensions") == 0)
  		{
  			i = cgltf_parse_json_unprocessed_extensions(options, tokens, i, json_chunk, &out_camera->extensions_count, &out_camera->extensions);
  		}
  		else
  		{
  			i = cgltf_skip_json(tokens, i+1);
  		}
  
  		if (i < 0)
  		{
  			return i;
  		}
  	}
  
  	return i;
  }
  
  static int cgltf_parse_json_cameras(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_data* out_data)
  {
  	i = cgltf_parse_json_array(options, tokens, i, json_chunk, sizeof(cgltf_camera), (void**)&out_data->cameras, &out_data->cameras_count);
  	if (i < 0)
  	{
  		return i;
  	}
  
  	for (cgltf_size j = 0; j < out_data->cameras_count; ++j)
  	{
  		i = cgltf_parse_json_camera(options, tokens, i, json_chunk, &out_data->cameras[j]);
  		if (i < 0)
  		{
  			return i;
  		}
  	}
  	return i;
  }
  
  static int cgltf_parse_json_light(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_light* out_light)
  {
  	CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
  
  	int size = tokens[i].size;
  	++i;
  
  	for (int j = 0; j < size; ++j)
  	{
  		CGLTF_CHECK_KEY(tokens[i]);
  
  		if (cgltf_json_strcmp(tokens+i, json_chunk, "name") == 0)
  		{
  			i = cgltf_parse_json_string(options, tokens, i + 1, json_chunk, &out_light->name);
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "color") == 0)
  		{
  			i = cgltf_parse_json_float_array(tokens, i + 1, json_chunk, out_light->color, 3);
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "intensity") == 0)
  		{
  			++i;
  			out_light->intensity = cgltf_json_to_float(tokens + i, json_chunk);
  			++i;
  		}
  		else if (cgltf_json_strcmp(tokens+i, json_chunk, "type") == 0)
  		{
  			++i;
  			if (cgltf_json_strcmp(tokens + i, json_chunk, "directional") == 0)
  			{
  				out_light->type = cgltf_light_type_directional;
  			}
  			else if (cgltf_json_strcmp(tokens + i, json_chunk, "point") == 0)
  			{
  				out_light->type = cgltf_light_type_point;
  			}
  			else if (cgltf_json_strcmp(tokens + i, json_chunk, "spot") == 0)
  			{
  				out_light->type = cgltf_light_type_spot;
  			}
  			++i;
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "range") == 0)
  		{
  			++i;
  			out_light->range = cgltf_json_to_float(tokens + i, json_chunk);
  			++i;
  		}
  		else if (cgltf_json_strcmp(tokens+i, json_chunk, "spot") == 0)
  		{
  			++i;
  
  			CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
  
  			int data_size = tokens[i].size;
  			++i;
  
  			for (int k = 0; k < data_size; ++k)
  			{
  				CGLTF_CHECK_KEY(tokens[i]);
  
  				if (cgltf_json_strcmp(tokens+i, json_chunk, "innerConeAngle") == 0)
  				{
  					++i;
  					out_light->spot_inner_cone_angle = cgltf_json_to_float(tokens + i, json_chunk);
  					++i;
  				}
  				else if (cgltf_json_strcmp(tokens+i, json_chunk, "outerConeAngle") == 0)
  				{
  					++i;
  					out_light->spot_outer_cone_angle = cgltf_json_to_float(tokens + i, json_chunk);
  					++i;
  				}
  				else
  				{
  					i = cgltf_skip_json(tokens, i+1);
  				}
  
  				if (i < 0)
  				{
  					return i;
  				}
  			}
  		}
  		else
  		{
  			i = cgltf_skip_json(tokens, i+1);
  		}
  
  		if (i < 0)
  		{
  			return i;
  		}
  	}
  
  	return i;
  }
  
  static int cgltf_parse_json_lights(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_data* out_data)
  {
  	i = cgltf_parse_json_array(options, tokens, i, json_chunk, sizeof(cgltf_light), (void**)&out_data->lights, &out_data->lights_count);
  	if (i < 0)
  	{
  		return i;
  	}
  
  	for (cgltf_size j = 0; j < out_data->lights_count; ++j)
  	{
  		i = cgltf_parse_json_light(options, tokens, i, json_chunk, &out_data->lights[j]);
  		if (i < 0)
  		{
  			return i;
  		}
  	}
  	return i;
  }
  
  static int cgltf_parse_json_node(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_node* out_node)
  {
  	CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
  
  	out_node->rotation[3] = 1.0f;
  	out_node->scale[0] = 1.0f;
  	out_node->scale[1] = 1.0f;
  	out_node->scale[2] = 1.0f;
  	out_node->matrix[0] = 1.0f;
  	out_node->matrix[5] = 1.0f;
  	out_node->matrix[10] = 1.0f;
  	out_node->matrix[15] = 1.0f;
  
  	int size = tokens[i].size;
  	++i;
  
  	for (int j = 0; j < size; ++j)
  	{
  		CGLTF_CHECK_KEY(tokens[i]);
  
  		if (cgltf_json_strcmp(tokens+i, json_chunk, "name") == 0)
  		{
  			i = cgltf_parse_json_string(options, tokens, i + 1, json_chunk, &out_node->name);
  		}
  		else if (cgltf_json_strcmp(tokens+i, json_chunk, "children") == 0)
  		{
  			i = cgltf_parse_json_array(options, tokens, i + 1, json_chunk, sizeof(cgltf_node*), (void**)&out_node->children, &out_node->children_count);
  			if (i < 0)
  			{
  				return i;
  			}
  
  			for (cgltf_size k = 0; k < out_node->children_count; ++k)
  			{
  				out_node->children[k] = CGLTF_PTRINDEX(cgltf_node, cgltf_json_to_int(tokens + i, json_chunk));
  				++i;
  			}
  		}
  		else if (cgltf_json_strcmp(tokens+i, json_chunk, "mesh") == 0)
  		{
  			++i;
  			CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_PRIMITIVE);
  			out_node->mesh = CGLTF_PTRINDEX(cgltf_mesh, cgltf_json_to_int(tokens + i, json_chunk));
  			++i;
  		}
  		else if (cgltf_json_strcmp(tokens+i, json_chunk, "skin") == 0)
  		{
  			++i;
  			CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_PRIMITIVE);
  			out_node->skin = CGLTF_PTRINDEX(cgltf_skin, cgltf_json_to_int(tokens + i, json_chunk));
  			++i;
  		}
  		else if (cgltf_json_strcmp(tokens+i, json_chunk, "camera") == 0)
  		{
  			++i;
  			CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_PRIMITIVE);
  			out_node->camera = CGLTF_PTRINDEX(cgltf_camera, cgltf_json_to_int(tokens + i, json_chunk));
  			++i;
  		}
  		else if (cgltf_json_strcmp(tokens+i, json_chunk, "translation") == 0)
  		{
  			out_node->has_translation = 1;
  			i = cgltf_parse_json_float_array(tokens, i + 1, json_chunk, out_node->translation, 3);
  		}
  		else if (cgltf_json_strcmp(tokens+i, json_chunk, "rotation") == 0)
  		{
  			out_node->has_rotation = 1;
  			i = cgltf_parse_json_float_array(tokens, i + 1, json_chunk, out_node->rotation, 4);
  		}
  		else if (cgltf_json_strcmp(tokens+i, json_chunk, "scale") == 0)
  		{
  			out_node->has_scale = 1;
  			i = cgltf_parse_json_float_array(tokens, i + 1, json_chunk, out_node->scale, 3);
  		}
  		else if (cgltf_json_strcmp(tokens+i, json_chunk, "matrix") == 0)
  		{
  			out_node->has_matrix = 1;
  			i = cgltf_parse_json_float_array(tokens, i + 1, json_chunk, out_node->matrix, 16);
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "weights") == 0)
  		{
  			i = cgltf_parse_json_array(options, tokens, i + 1, json_chunk, sizeof(cgltf_float), (void**)&out_node->weights, &out_node->weights_count);
  			if (i < 0)
  			{
  				return i;
  			}
  
  			i = cgltf_parse_json_float_array(tokens, i - 1, json_chunk, out_node->weights, (int)out_node->weights_count);
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "extras") == 0)
  		{
  			i = cgltf_parse_json_extras(tokens, i + 1, json_chunk, &out_node->extras);
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "extensions") == 0)
  		{
  			++i;
  
  			CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
  			if(out_node->extensions)
  			{
  				return CGLTF_ERROR_JSON;
  			}
  
  			int extensions_size = tokens[i].size;
  			out_node->extensions_count= 0;
  			out_node->extensions = (cgltf_extension*)cgltf_calloc(options, sizeof(cgltf_extension), extensions_size);
  
  			if (!out_node->extensions)
  			{
  				return CGLTF_ERROR_NOMEM;
  			}
  
  			++i;
  
  			for (int k = 0; k < extensions_size; ++k)
  			{
  				CGLTF_CHECK_KEY(tokens[i]);
  
  				if (cgltf_json_strcmp(tokens+i, json_chunk, "KHR_lights_punctual") == 0)
  				{
  					++i;
  
  					CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
  
  					int data_size = tokens[i].size;
  					++i;
  
  					for (int m = 0; m < data_size; ++m)
  					{
  						CGLTF_CHECK_KEY(tokens[i]);
  
  						if (cgltf_json_strcmp(tokens + i, json_chunk, "light") == 0)
  						{
  							++i;
  							CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_PRIMITIVE);
  							out_node->light = CGLTF_PTRINDEX(cgltf_light, cgltf_json_to_int(tokens + i, json_chunk));
  							++i;
  						}
  						else
  						{
  							i = cgltf_skip_json(tokens, i + 1);
  						}
  
  						if (i < 0)
  						{
  							return i;
  						}
  					}
  				}
  				else
  				{
  					i = cgltf_parse_json_unprocessed_extension(options, tokens, i, json_chunk, &(out_node->extensions[out_node->extensions_count++]));
  				}
  
  				if (i < 0)
  				{
  					return i;
  				}
  			}
  		}
  		else
  		{
  			i = cgltf_skip_json(tokens, i+1);
  		}
  
  		if (i < 0)
  		{
  			return i;
  		}
  	}
  
  	return i;
  }
  
  static int cgltf_parse_json_nodes(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_data* out_data)
  {
  	i = cgltf_parse_json_array(options, tokens, i, json_chunk, sizeof(cgltf_node), (void**)&out_data->nodes, &out_data->nodes_count);
  	if (i < 0)
  	{
  		return i;
  	}
  
  	for (cgltf_size j = 0; j < out_data->nodes_count; ++j)
  	{
  		i = cgltf_parse_json_node(options, tokens, i, json_chunk, &out_data->nodes[j]);
  		if (i < 0)
  		{
  			return i;
  		}
  	}
  	return i;
  }
  
  static int cgltf_parse_json_scene(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_scene* out_scene)
  {
  	CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
  
  	int size = tokens[i].size;
  	++i;
  
  	for (int j = 0; j < size; ++j)
  	{
  		CGLTF_CHECK_KEY(tokens[i]);
  
  		if (cgltf_json_strcmp(tokens+i, json_chunk, "name") == 0)
  		{
  			i = cgltf_parse_json_string(options, tokens, i + 1, json_chunk, &out_scene->name);
  		}
  		else if (cgltf_json_strcmp(tokens+i, json_chunk, "nodes") == 0)
  		{
  			i = cgltf_parse_json_array(options, tokens, i + 1, json_chunk, sizeof(cgltf_node*), (void**)&out_scene->nodes, &out_scene->nodes_count);
  			if (i < 0)
  			{
  				return i;
  			}
  
  			for (cgltf_size k = 0; k < out_scene->nodes_count; ++k)
  			{
  				out_scene->nodes[k] = CGLTF_PTRINDEX(cgltf_node, cgltf_json_to_int(tokens + i, json_chunk));
  				++i;
  			}
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "extras") == 0)
  		{
  			i = cgltf_parse_json_extras(tokens, i + 1, json_chunk, &out_scene->extras);
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "extensions") == 0)
  		{
  			i = cgltf_parse_json_unprocessed_extensions(options, tokens, i, json_chunk, &out_scene->extensions_count, &out_scene->extensions);
  		}
  		else
  		{
  			i = cgltf_skip_json(tokens, i+1);
  		}
  
  		if (i < 0)
  		{
  			return i;
  		}
  	}
  
  	return i;
  }
  
  static int cgltf_parse_json_scenes(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_data* out_data)
  {
  	i = cgltf_parse_json_array(options, tokens, i, json_chunk, sizeof(cgltf_scene), (void**)&out_data->scenes, &out_data->scenes_count);
  	if (i < 0)
  	{
  		return i;
  	}
  
  	for (cgltf_size j = 0; j < out_data->scenes_count; ++j)
  	{
  		i = cgltf_parse_json_scene(options, tokens, i, json_chunk, &out_data->scenes[j]);
  		if (i < 0)
  		{
  			return i;
  		}
  	}
  	return i;
  }
  
  static int cgltf_parse_json_animation_sampler(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_animation_sampler* out_sampler)
  {
  	(void)options;
  	CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
  
  	int size = tokens[i].size;
  	++i;
  
  	for (int j = 0; j < size; ++j)
  	{
  		CGLTF_CHECK_KEY(tokens[i]);
  
  		if (cgltf_json_strcmp(tokens+i, json_chunk, "input") == 0)
  		{
  			++i;
  			out_sampler->input = CGLTF_PTRINDEX(cgltf_accessor, cgltf_json_to_int(tokens + i, json_chunk));
  			++i;
  		}
  		else if (cgltf_json_strcmp(tokens+i, json_chunk, "output") == 0)
  		{
  			++i;
  			out_sampler->output = CGLTF_PTRINDEX(cgltf_accessor, cgltf_json_to_int(tokens + i, json_chunk));
  			++i;
  		}
  		else if (cgltf_json_strcmp(tokens+i, json_chunk, "interpolation") == 0)
  		{
  			++i;
  			if (cgltf_json_strcmp(tokens + i, json_chunk, "LINEAR") == 0)
  			{
  				out_sampler->interpolation = cgltf_interpolation_type_linear;
  			}
  			else if (cgltf_json_strcmp(tokens + i, json_chunk, "STEP") == 0)
  			{
  				out_sampler->interpolation = cgltf_interpolation_type_step;
  			}
  			else if (cgltf_json_strcmp(tokens + i, json_chunk, "CUBICSPLINE") == 0)
  			{
  				out_sampler->interpolation = cgltf_interpolation_type_cubic_spline;
  			}
  			++i;
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "extras") == 0)
  		{
  			i = cgltf_parse_json_extras(tokens, i + 1, json_chunk, &out_sampler->extras);
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "extensions") == 0)
  		{
  			i = cgltf_parse_json_unprocessed_extensions(options, tokens, i, json_chunk, &out_sampler->extensions_count, &out_sampler->extensions);
  		}
  		else
  		{
  			i = cgltf_skip_json(tokens, i+1);
  		}
  
  		if (i < 0)
  		{
  			return i;
  		}
  	}
  
  	return i;
  }
  
  static int cgltf_parse_json_animation_channel(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_animation_channel* out_channel)
  {
  	(void)options;
  	CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
  
  	int size = tokens[i].size;
  	++i;
  
  	for (int j = 0; j < size; ++j)
  	{
  		CGLTF_CHECK_KEY(tokens[i]);
  
  		if (cgltf_json_strcmp(tokens+i, json_chunk, "sampler") == 0)
  		{
  			++i;
  			out_channel->sampler = CGLTF_PTRINDEX(cgltf_animation_sampler, cgltf_json_to_int(tokens + i, json_chunk));
  			++i;
  		}
  		else if (cgltf_json_strcmp(tokens+i, json_chunk, "target") == 0)
  		{
  			++i;
  
  			CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
  
  			int target_size = tokens[i].size;
  			++i;
  
  			for (int k = 0; k < target_size; ++k)
  			{
  				CGLTF_CHECK_KEY(tokens[i]);
  
  				if (cgltf_json_strcmp(tokens+i, json_chunk, "node") == 0)
  				{
  					++i;
  					out_channel->target_node = CGLTF_PTRINDEX(cgltf_node, cgltf_json_to_int(tokens + i, json_chunk));
  					++i;
  				}
  				else if (cgltf_json_strcmp(tokens+i, json_chunk, "path") == 0)
  				{
  					++i;
  					if (cgltf_json_strcmp(tokens+i, json_chunk, "translation") == 0)
  					{
  						out_channel->target_path = cgltf_animation_path_type_translation;
  					}
  					else if (cgltf_json_strcmp(tokens+i, json_chunk, "rotation") == 0)
  					{
  						out_channel->target_path = cgltf_animation_path_type_rotation;
  					}
  					else if (cgltf_json_strcmp(tokens+i, json_chunk, "scale") == 0)
  					{
  						out_channel->target_path = cgltf_animation_path_type_scale;
  					}
  					else if (cgltf_json_strcmp(tokens+i, json_chunk, "weights") == 0)
  					{
  						out_channel->target_path = cgltf_animation_path_type_weights;
  					}
  					++i;
  				}
  				else if (cgltf_json_strcmp(tokens + i, json_chunk, "extras") == 0)
  				{
  					i = cgltf_parse_json_extras(tokens, i + 1, json_chunk, &out_channel->extras);
  				}
  				else if (cgltf_json_strcmp(tokens + i, json_chunk, "extensions") == 0)
  				{
  					i = cgltf_parse_json_unprocessed_extensions(options, tokens, i, json_chunk, &out_channel->extensions_count, &out_channel->extensions);
  				}
  				else
  				{
  					i = cgltf_skip_json(tokens, i+1);
  				}
  
  				if (i < 0)
  				{
  					return i;
  				}
  			}
  		}
  		else
  		{
  			i = cgltf_skip_json(tokens, i+1);
  		}
  
  		if (i < 0)
  		{
  			return i;
  		}
  	}
  
  	return i;
  }
  
  static int cgltf_parse_json_animation(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_animation* out_animation)
  {
  	CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
  
  	int size = tokens[i].size;
  	++i;
  
  	for (int j = 0; j < size; ++j)
  	{
  		CGLTF_CHECK_KEY(tokens[i]);
  
  		if (cgltf_json_strcmp(tokens+i, json_chunk, "name") == 0)
  		{
  			i = cgltf_parse_json_string(options, tokens, i + 1, json_chunk, &out_animation->name);
  		}
  		else if (cgltf_json_strcmp(tokens+i, json_chunk, "samplers") == 0)
  		{
  			i = cgltf_parse_json_array(options, tokens, i + 1, json_chunk, sizeof(cgltf_animation_sampler), (void**)&out_animation->samplers, &out_animation->samplers_count);
  			if (i < 0)
  			{
  				return i;
  			}
  
  			for (cgltf_size k = 0; k < out_animation->samplers_count; ++k)
  			{
  				i = cgltf_parse_json_animation_sampler(options, tokens, i, json_chunk, &out_animation->samplers[k]);
  				if (i < 0)
  				{
  					return i;
  				}
  			}
  		}
  		else if (cgltf_json_strcmp(tokens+i, json_chunk, "channels") == 0)
  		{
  			i = cgltf_parse_json_array(options, tokens, i + 1, json_chunk, sizeof(cgltf_animation_channel), (void**)&out_animation->channels, &out_animation->channels_count);
  			if (i < 0)
  			{
  				return i;
  			}
  
  			for (cgltf_size k = 0; k < out_animation->channels_count; ++k)
  			{
  				i = cgltf_parse_json_animation_channel(options, tokens, i, json_chunk, &out_animation->channels[k]);
  				if (i < 0)
  				{
  					return i;
  				}
  			}
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "extras") == 0)
  		{
  			i = cgltf_parse_json_extras(tokens, i + 1, json_chunk, &out_animation->extras);
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "extensions") == 0)
  		{
  			i = cgltf_parse_json_unprocessed_extensions(options, tokens, i, json_chunk, &out_animation->extensions_count, &out_animation->extensions);
  		}
  		else
  		{
  			i = cgltf_skip_json(tokens, i+1);
  		}
  
  		if (i < 0)
  		{
  			return i;
  		}
  	}
  
  	return i;
  }
  
  static int cgltf_parse_json_animations(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_data* out_data)
  {
  	i = cgltf_parse_json_array(options, tokens, i, json_chunk, sizeof(cgltf_animation), (void**)&out_data->animations, &out_data->animations_count);
  	if (i < 0)
  	{
  		return i;
  	}
  
  	for (cgltf_size j = 0; j < out_data->animations_count; ++j)
  	{
  		i = cgltf_parse_json_animation(options, tokens, i, json_chunk, &out_data->animations[j]);
  		if (i < 0)
  		{
  			return i;
  		}
  	}
  	return i;
  }
  
  static int cgltf_parse_json_asset(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_asset* out_asset)
  {
  	CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
  
  	int size = tokens[i].size;
  	++i;
  
  	for (int j = 0; j < size; ++j)
  	{
  		CGLTF_CHECK_KEY(tokens[i]);
  
  		if (cgltf_json_strcmp(tokens+i, json_chunk, "copyright") == 0)
  		{
  			i = cgltf_parse_json_string(options, tokens, i + 1, json_chunk, &out_asset->copyright);
  		}
  		else if (cgltf_json_strcmp(tokens+i, json_chunk, "generator") == 0)
  		{
  			i = cgltf_parse_json_string(options, tokens, i + 1, json_chunk, &out_asset->generator);
  		}
  		else if (cgltf_json_strcmp(tokens+i, json_chunk, "version") == 0)
  		{
  			i = cgltf_parse_json_string(options, tokens, i + 1, json_chunk, &out_asset->version);
  		}
  		else if (cgltf_json_strcmp(tokens+i, json_chunk, "minVersion") == 0)
  		{
  			i = cgltf_parse_json_string(options, tokens, i + 1, json_chunk, &out_asset->min_version);
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "extras") == 0)
  		{
  			i = cgltf_parse_json_extras(tokens, i + 1, json_chunk, &out_asset->extras);
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "extensions") == 0)
  		{
  			i = cgltf_parse_json_unprocessed_extensions(options, tokens, i, json_chunk, &out_asset->extensions_count, &out_asset->extensions);
  		}
  		else
  		{
  			i = cgltf_skip_json(tokens, i+1);
  		}
  
  		if (i < 0)
  		{
  			return i;
  		}
  	}
  
  	if (out_asset->version && CGLTF_ATOF(out_asset->version) < 2)
  	{
  		return CGLTF_ERROR_LEGACY;
  	}
  
  	return i;
  }
  
  cgltf_size cgltf_num_components(cgltf_type type) {
  	switch (type)
  	{
  	case cgltf_type_vec2:
  		return 2;
  	case cgltf_type_vec3:
  		return 3;
  	case cgltf_type_vec4:
  		return 4;
  	case cgltf_type_mat2:
  		return 4;
  	case cgltf_type_mat3:
  		return 9;
  	case cgltf_type_mat4:
  		return 16;
  	case cgltf_type_invalid:
  	case cgltf_type_scalar:
  	default:
  		return 1;
  	}
  }
  
  static cgltf_size cgltf_component_size(cgltf_component_type component_type) {
  	switch (component_type)
  	{
  	case cgltf_component_type_r_8:
  	case cgltf_component_type_r_8u:
  		return 1;
  	case cgltf_component_type_r_16:
  	case cgltf_component_type_r_16u:
  		return 2;
  	case cgltf_component_type_r_32u:
  	case cgltf_component_type_r_32f:
  		return 4;
  	case cgltf_component_type_invalid:
  	default:
  		return 0;
  	}
  }
  
  static cgltf_size cgltf_calc_size(cgltf_type type, cgltf_component_type component_type)
  {
  	cgltf_size component_size = cgltf_component_size(component_type);
  	if (type == cgltf_type_mat2 && component_size == 1)
  	{
  		return 8 * component_size;
  	}
  	else if (type == cgltf_type_mat3 && (component_size == 1 || component_size == 2))
  	{
  		return 12 * component_size;
  	}
  	return component_size * cgltf_num_components(type);
  }
  
  static int cgltf_fixup_pointers(cgltf_data* out_data);
  
  static int cgltf_parse_json_root(cgltf_options* options, jsmntok_t const* tokens, int i, const uint8_t* json_chunk, cgltf_data* out_data)
  {
  	CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
  
  	int size = tokens[i].size;
  	++i;
  
  	for (int j = 0; j < size; ++j)
  	{
  		CGLTF_CHECK_KEY(tokens[i]);
  
  		if (cgltf_json_strcmp(tokens + i, json_chunk, "asset") == 0)
  		{
  			i = cgltf_parse_json_asset(options, tokens, i + 1, json_chunk, &out_data->asset);
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "meshes") == 0)
  		{
  			i = cgltf_parse_json_meshes(options, tokens, i + 1, json_chunk, out_data);
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "accessors") == 0)
  		{
  			i = cgltf_parse_json_accessors(options, tokens, i + 1, json_chunk, out_data);
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "bufferViews") == 0)
  		{
  			i = cgltf_parse_json_buffer_views(options, tokens, i + 1, json_chunk, out_data);
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "buffers") == 0)
  		{
  			i = cgltf_parse_json_buffers(options, tokens, i + 1, json_chunk, out_data);
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "materials") == 0)
  		{
  			i = cgltf_parse_json_materials(options, tokens, i + 1, json_chunk, out_data);
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "images") == 0)
  		{
  			i = cgltf_parse_json_images(options, tokens, i + 1, json_chunk, out_data);
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "textures") == 0)
  		{
  			i = cgltf_parse_json_textures(options, tokens, i + 1, json_chunk, out_data);
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "samplers") == 0)
  		{
  			i = cgltf_parse_json_samplers(options, tokens, i + 1, json_chunk, out_data);
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "skins") == 0)
  		{
  			i = cgltf_parse_json_skins(options, tokens, i + 1, json_chunk, out_data);
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "cameras") == 0)
  		{
  			i = cgltf_parse_json_cameras(options, tokens, i + 1, json_chunk, out_data);
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "nodes") == 0)
  		{
  			i = cgltf_parse_json_nodes(options, tokens, i + 1, json_chunk, out_data);
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "scenes") == 0)
  		{
  			i = cgltf_parse_json_scenes(options, tokens, i + 1, json_chunk, out_data);
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "scene") == 0)
  		{
  			++i;
  			out_data->scene = CGLTF_PTRINDEX(cgltf_scene, cgltf_json_to_int(tokens + i, json_chunk));
  			++i;
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "animations") == 0)
  		{
  			i = cgltf_parse_json_animations(options, tokens, i + 1, json_chunk, out_data);
  		}
  		else if (cgltf_json_strcmp(tokens+i, json_chunk, "extras") == 0)
  		{
  			i = cgltf_parse_json_extras(tokens, i + 1, json_chunk, &out_data->extras);
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "extensions") == 0)
  		{
  			++i;
  
  			CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
  			if(out_data->data_extensions)
  			{
  				return CGLTF_ERROR_JSON;
  			}
  
  			int extensions_size = tokens[i].size;
  			out_data->data_extensions_count = 0;
  			out_data->data_extensions = (cgltf_extension*)cgltf_calloc(options, sizeof(cgltf_extension), extensions_size);
  
  			if (!out_data->data_extensions)
  			{
  				return CGLTF_ERROR_NOMEM;
  			}
  
  			++i;
  
  			for (int k = 0; k < extensions_size; ++k)
  			{
  				CGLTF_CHECK_KEY(tokens[i]);
  
  				if (cgltf_json_strcmp(tokens+i, json_chunk, "KHR_lights_punctual") == 0)
  				{
  					++i;
  
  					CGLTF_CHECK_TOKTYPE(tokens[i], JSMN_OBJECT);
  
  					int data_size = tokens[i].size;
  					++i;
  
  					for (int m = 0; m < data_size; ++m)
  					{
  						CGLTF_CHECK_KEY(tokens[i]);
  
  						if (cgltf_json_strcmp(tokens + i, json_chunk, "lights") == 0)
  						{
  							i = cgltf_parse_json_lights(options, tokens, i + 1, json_chunk, out_data);
  						}
  						else
  						{
  							i = cgltf_skip_json(tokens, i + 1);
  						}
  
  						if (i < 0)
  						{
  							return i;
  						}
  					}
  				}
  				else
  				{
  					i = cgltf_parse_json_unprocessed_extension(options, tokens, i, json_chunk, &(out_data->data_extensions[out_data->data_extensions_count++]));
  				}
  
  				if (i < 0)
  				{
  					return i;
  				}
  			}
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "extensionsUsed") == 0)
  		{
  			i = cgltf_parse_json_string_array(options, tokens, i + 1, json_chunk, &out_data->extensions_used, &out_data->extensions_used_count);
  		}
  		else if (cgltf_json_strcmp(tokens + i, json_chunk, "extensionsRequired") == 0)
  		{
  			i = cgltf_parse_json_string_array(options, tokens, i + 1, json_chunk, &out_data->extensions_required, &out_data->extensions_required_count);
  		}
  		else
  		{
  			i = cgltf_skip_json(tokens, i + 1);
  		}
  
  		if (i < 0)
  		{
  			return i;
  		}
  	}
  
  	return i;
  }
  
  cgltf_result cgltf_parse_json(cgltf_options* options, const uint8_t* json_chunk, cgltf_size size, cgltf_data** out_data)
  {
  	jsmn_parser parser = { 0, 0, 0 };
  
  	if (options->json_token_count == 0)
  	{
  		int token_count = jsmn_parse(&parser, (const char*)json_chunk, size, NULL, 0);
  
  		if (token_count <= 0)
  		{
  			return cgltf_result_invalid_json;
  		}
  
  		options->json_token_count = token_count;
  	}
  
  	jsmntok_t* tokens = (jsmntok_t*)options->memory.alloc(options->memory.user_data, sizeof(jsmntok_t) * (options->json_token_count + 1));
  
  	if (!tokens)
  	{
  		return cgltf_result_out_of_memory;
  	}
  
  	jsmn_init(&parser);
  
  	int token_count = jsmn_parse(&parser, (const char*)json_chunk, size, tokens, options->json_token_count);
  
  	if (token_count <= 0)
  	{
  		options->memory.free(options->memory.user_data, tokens);
  		return cgltf_result_invalid_json;
  	}
  
  	// this makes sure that we always have an UNDEFINED token at the end of the stream
  	// for invalid JSON inputs this makes sure we don't perform out of bound reads of token data
  	tokens[token_count].type = JSMN_UNDEFINED;
  
  	cgltf_data* data = (cgltf_data*)options->memory.alloc(options->memory.user_data, sizeof(cgltf_data));
  
  	if (!data)
  	{
  		options->memory.free(options->memory.user_data, tokens);
  		return cgltf_result_out_of_memory;
  	}
  
  	memset(data, 0, sizeof(cgltf_data));
  	data->memory = options->memory;
  	data->file = options->file;
  
  	int i = cgltf_parse_json_root(options, tokens, 0, json_chunk, data);
  
  	options->memory.free(options->memory.user_data, tokens);
  
  	if (i < 0)
  	{
  		cgltf_free(data);
  
  		switch (i)
  		{
  		case CGLTF_ERROR_NOMEM: return cgltf_result_out_of_memory;
  		case CGLTF_ERROR_LEGACY: return cgltf_result_legacy_gltf;
  		default: return cgltf_result_invalid_gltf;
  		}
  	}
  
  	if (cgltf_fixup_pointers(data) < 0)
  	{
  		cgltf_free(data);
  		return cgltf_result_invalid_gltf;
  	}
  
  	data->json = (const char*)json_chunk;
  	data->json_size = size;
  
  	*out_data = data;
  
  	return cgltf_result_success;
  }
  
  static int cgltf_fixup_pointers(cgltf_data* data)
  {
  	for (cgltf_size i = 0; i < data->meshes_count; ++i)
  	{
  		for (cgltf_size j = 0; j < data->meshes[i].primitives_count; ++j)
  		{
  			CGLTF_PTRFIXUP(data->meshes[i].primitives[j].indices, data->accessors, data->accessors_count);
  			CGLTF_PTRFIXUP(data->meshes[i].primitives[j].material, data->materials, data->materials_count);
  
  			for (cgltf_size k = 0; k < data->meshes[i].primitives[j].attributes_count; ++k)
  			{
  				CGLTF_PTRFIXUP_REQ(data->meshes[i].primitives[j].attributes[k].data, data->accessors, data->accessors_count);
  			}
  
  			for (cgltf_size k = 0; k < data->meshes[i].primitives[j].targets_count; ++k)
  			{
  				for (cgltf_size m = 0; m < data->meshes[i].primitives[j].targets[k].attributes_count; ++m)
  				{
  					CGLTF_PTRFIXUP_REQ(data->meshes[i].primitives[j].targets[k].attributes[m].data, data->accessors, data->accessors_count);
  				}
  			}
  
  			if (data->meshes[i].primitives[j].has_draco_mesh_compression)
  			{
  				CGLTF_PTRFIXUP_REQ(data->meshes[i].primitives[j].draco_mesh_compression.buffer_view, data->buffer_views, data->buffer_views_count);
  				for (cgltf_size m = 0; m < data->meshes[i].primitives[j].draco_mesh_compression.attributes_count; ++m)
  				{
  					CGLTF_PTRFIXUP_REQ(data->meshes[i].primitives[j].draco_mesh_compression.attributes[m].data, data->accessors, data->accessors_count);
  				}
  			}
  		}
  	}
  
  	for (cgltf_size i = 0; i < data->accessors_count; ++i)
  	{
  		CGLTF_PTRFIXUP(data->accessors[i].buffer_view, data->buffer_views, data->buffer_views_count);
  
  		if (data->accessors[i].is_sparse)
  		{
  			CGLTF_PTRFIXUP_REQ(data->accessors[i].sparse.indices_buffer_view, data->buffer_views, data->buffer_views_count);
  			CGLTF_PTRFIXUP_REQ(data->accessors[i].sparse.values_buffer_view, data->buffer_views, data->buffer_views_count);
  		}
  
  		if (data->accessors[i].buffer_view)
  		{
  			data->accessors[i].stride = data->accessors[i].buffer_view->stride;
  		}
  
  		if (data->accessors[i].stride == 0)
  		{
  			data->accessors[i].stride = cgltf_calc_size(data->accessors[i].type, data->accessors[i].component_type);
  		}
  	}
  
  	for (cgltf_size i = 0; i < data->textures_count; ++i)
  	{
  		CGLTF_PTRFIXUP(data->textures[i].image, data->images, data->images_count);
  		CGLTF_PTRFIXUP(data->textures[i].sampler, data->samplers, data->samplers_count);
  	}
  
  	for (cgltf_size i = 0; i < data->images_count; ++i)
  	{
  		CGLTF_PTRFIXUP(data->images[i].buffer_view, data->buffer_views, data->buffer_views_count);
  	}
  
  	for (cgltf_size i = 0; i < data->materials_count; ++i)
  	{
  		CGLTF_PTRFIXUP(data->materials[i].normal_texture.texture, data->textures, data->textures_count);
  		CGLTF_PTRFIXUP(data->materials[i].emissive_texture.texture, data->textures, data->textures_count);
  		CGLTF_PTRFIXUP(data->materials[i].occlusion_texture.texture, data->textures, data->textures_count);
  
  		CGLTF_PTRFIXUP(data->materials[i].pbr_metallic_roughness.base_color_texture.texture, data->textures, data->textures_count);
  		CGLTF_PTRFIXUP(data->materials[i].pbr_metallic_roughness.metallic_roughness_texture.texture, data->textures, data->textures_count);
  
  		CGLTF_PTRFIXUP(data->materials[i].pbr_specular_glossiness.diffuse_texture.texture, data->textures, data->textures_count);
  		CGLTF_PTRFIXUP(data->materials[i].pbr_specular_glossiness.specular_glossiness_texture.texture, data->textures, data->textures_count);
  
  		CGLTF_PTRFIXUP(data->materials[i].clearcoat.clearcoat_texture.texture, data->textures, data->textures_count);
  		CGLTF_PTRFIXUP(data->materials[i].clearcoat.clearcoat_roughness_texture.texture, data->textures, data->textures_count);
  		CGLTF_PTRFIXUP(data->materials[i].clearcoat.clearcoat_normal_texture.texture, data->textures, data->textures_count);
  
  		CGLTF_PTRFIXUP(data->materials[i].specular.specular_texture.texture, data->textures, data->textures_count);
  
  		CGLTF_PTRFIXUP(data->materials[i].transmission.transmission_texture.texture, data->textures, data->textures_count);
  	}
  
  	for (cgltf_size i = 0; i < data->buffer_views_count; ++i)
  	{
  		CGLTF_PTRFIXUP_REQ(data->buffer_views[i].buffer, data->buffers, data->buffers_count);
  	}
  
  	for (cgltf_size i = 0; i < data->skins_count; ++i)
  	{
  		for (cgltf_size j = 0; j < data->skins[i].joints_count; ++j)
  		{
  			CGLTF_PTRFIXUP_REQ(data->skins[i].joints[j], data->nodes, data->nodes_count);
  		}
  
  		CGLTF_PTRFIXUP(data->skins[i].skeleton, data->nodes, data->nodes_count);
  		CGLTF_PTRFIXUP(data->skins[i].inverse_bind_matrices, data->accessors, data->accessors_count);
  	}
  
  	for (cgltf_size i = 0; i < data->nodes_count; ++i)
  	{
  		for (cgltf_size j = 0; j < data->nodes[i].children_count; ++j)
  		{
  			CGLTF_PTRFIXUP_REQ(data->nodes[i].children[j], data->nodes, data->nodes_count);
  
  			if (data->nodes[i].children[j]->parent)
  			{
  				return CGLTF_ERROR_JSON;
  			}
  
  			data->nodes[i].children[j]->parent = &data->nodes[i];
  		}
  
  		CGLTF_PTRFIXUP(data->nodes[i].mesh, data->meshes, data->meshes_count);
  		CGLTF_PTRFIXUP(data->nodes[i].skin, data->skins, data->skins_count);
  		CGLTF_PTRFIXUP(data->nodes[i].camera, data->cameras, data->cameras_count);
  		CGLTF_PTRFIXUP(data->nodes[i].light, data->lights, data->lights_count);
  	}
  
  	for (cgltf_size i = 0; i < data->scenes_count; ++i)
  	{
  		for (cgltf_size j = 0; j < data->scenes[i].nodes_count; ++j)
  		{
  			CGLTF_PTRFIXUP_REQ(data->scenes[i].nodes[j], data->nodes, data->nodes_count);
  
  			if (data->scenes[i].nodes[j]->parent)
  			{
  				return CGLTF_ERROR_JSON;
  			}
  		}
  	}
  
  	CGLTF_PTRFIXUP(data->scene, data->scenes, data->scenes_count);
  
  	for (cgltf_size i = 0; i < data->animations_count; ++i)
  	{
  		for (cgltf_size j = 0; j < data->animations[i].samplers_count; ++j)
  		{
  			CGLTF_PTRFIXUP_REQ(data->animations[i].samplers[j].input, data->accessors, data->accessors_count);
  			CGLTF_PTRFIXUP_REQ(data->animations[i].samplers[j].output, data->accessors, data->accessors_count);
  		}
  
  		for (cgltf_size j = 0; j < data->animations[i].channels_count; ++j)
  		{
  			CGLTF_PTRFIXUP_REQ(data->animations[i].channels[j].sampler, data->animations[i].samplers, data->animations[i].samplers_count);
  			CGLTF_PTRFIXUP(data->animations[i].channels[j].target_node, data->nodes, data->nodes_count);
  		}
  	}
  
  	return 0;
  }
  
  /*
   * -- jsmn.c start --
   * Source: https://github.com/zserge/jsmn
   * License: MIT
   *
   * Copyright (c) 2010 Serge A. Zaitsev
  
   * Permission is hereby granted, free of charge, to any person obtaining a copy
   * of this software and associated documentation files (the "Software"), to deal
   * in the Software without restriction, including without limitation the rights
   * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   * copies of the Software, and to permit persons to whom the Software is
   * furnished to do so, subject to the following conditions:
  
   * The above copyright notice and this permission notice shall be included in
   * all copies or substantial portions of the Software.
  
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
   * THE SOFTWARE.
   */
  
  /**
   * Allocates a fresh unused token from the token pull.
   */
  static jsmntok_t *jsmn_alloc_token(jsmn_parser *parser,
  				   jsmntok_t *tokens, size_t num_tokens) {
  	jsmntok_t *tok;
  	if (parser->toknext >= num_tokens) {
  		return NULL;
  	}
  	tok = &tokens[parser->toknext++];
  	tok->start = tok->end = -1;
  	tok->size = 0;
  #ifdef JSMN_PARENT_LINKS
  	tok->parent = -1;
  #endif
  	return tok;
  }
  
  /**
   * Fills token type and boundaries.
   */
  static void jsmn_fill_token(jsmntok_t *token, jsmntype_t type,
  			    int start, int end) {
  	token->type = type;
  	token->start = start;
  	token->end = end;
  	token->size = 0;
  }
  
  /**
   * Fills next available token with JSON primitive.
   */
  static int jsmn_parse_primitive(jsmn_parser *parser, const char *js,
  				size_t len, jsmntok_t *tokens, size_t num_tokens) {
  	jsmntok_t *token;
  	int start;
  
  	start = parser->pos;
  
  	for (; parser->pos < len && js[parser->pos] != '\0'; parser->pos++) {
  		switch (js[parser->pos]) {
  #ifndef JSMN_STRICT
  		/* In strict mode primitive must be followed by "," or "}" or "]" */
  		case ':':
  #endif
  		case '\t' : case '\r' : case '\n' : case ' ' :
  		case ','  : case ']'  : case '}' :
  			goto found;
  		}
  		if (js[parser->pos] < 32 || js[parser->pos] >= 127) {
  			parser->pos = start;
  			return JSMN_ERROR_INVAL;
  		}
  	}
  #ifdef JSMN_STRICT
  	/* In strict mode primitive must be followed by a comma/object/array */
  	parser->pos = start;
  	return JSMN_ERROR_PART;
  #endif
  
  found:
  	if (tokens == NULL) {
  		parser->pos--;
  		return 0;
  	}
  	token = jsmn_alloc_token(parser, tokens, num_tokens);
  	if (token == NULL) {
  		parser->pos = start;
  		return JSMN_ERROR_NOMEM;
  	}
  	jsmn_fill_token(token, JSMN_PRIMITIVE, start, parser->pos);
  #ifdef JSMN_PARENT_LINKS
  	token->parent = parser->toksuper;
  #endif
  	parser->pos--;
  	return 0;
  }
  
  /**
   * Fills next token with JSON string.
   */
  static int jsmn_parse_string(jsmn_parser *parser, const char *js,
  			     size_t len, jsmntok_t *tokens, size_t num_tokens) {
  	jsmntok_t *token;
  
  	int start = parser->pos;
  
  	parser->pos++;
  
  	/* Skip starting quote */
  	for (; parser->pos < len && js[parser->pos] != '\0'; parser->pos++) {
  		char c = js[parser->pos];
  
  		/* Quote: end of string */
  		if (c == '\"') {
  			if (tokens == NULL) {
  				return 0;
  			}
  			token = jsmn_alloc_token(parser, tokens, num_tokens);
  			if (token == NULL) {
  				parser->pos = start;
  				return JSMN_ERROR_NOMEM;
  			}
  			jsmn_fill_token(token, JSMN_STRING, start+1, parser->pos);
  #ifdef JSMN_PARENT_LINKS
  			token->parent = parser->toksuper;
  #endif
  			return 0;
  		}
  
  		/* Backslash: Quoted symbol expected */
  		if (c == '\\' && parser->pos + 1 < len) {
  			int i;
  			parser->pos++;
  			switch (js[parser->pos]) {
  			/* Allowed escaped symbols */
  			case '\"': case '/' : case '\\' : case 'b' :
  			case 'f' : case 'r' : case 'n'  : case 't' :
  				break;
  				/* Allows escaped symbol \uXXXX */
  			case 'u':
  				parser->pos++;
  				for(i = 0; i < 4 && parser->pos < len && js[parser->pos] != '\0'; i++) {
  					/* If it isn't a hex character we have an error */
  					if(!((js[parser->pos] >= 48 && js[parser->pos] <= 57) || /* 0-9 */
  					     (js[parser->pos] >= 65 && js[parser->pos] <= 70) || /* A-F */
  					     (js[parser->pos] >= 97 && js[parser->pos] <= 102))) { /* a-f */
  						parser->pos = start;
  						return JSMN_ERROR_INVAL;
  					}
  					parser->pos++;
  				}
  				parser->pos--;
  				break;
  				/* Unexpected symbol */
  			default:
  				parser->pos = start;
  				return JSMN_ERROR_INVAL;
  			}
  		}
  	}
  	parser->pos = start;
  	return JSMN_ERROR_PART;
  }
  
  /**
   * Parse JSON string and fill tokens.
   */
  static int jsmn_parse(jsmn_parser *parser, const char *js, size_t len,
  	       jsmntok_t *tokens, size_t num_tokens) {
  	int r;
  	int i;
  	jsmntok_t *token;
  	int count = parser->toknext;
  
  	for (; parser->pos < len && js[parser->pos] != '\0'; parser->pos++) {
  		char c;
  		jsmntype_t type;
  
  		c = js[parser->pos];
  		switch (c) {
  		case '{': case '[':
  			count++;
  			if (tokens == NULL) {
  				break;
  			}
  			token = jsmn_alloc_token(parser, tokens, num_tokens);
  			if (token == NULL)
  				return JSMN_ERROR_NOMEM;
  			if (parser->toksuper != -1) {
  				tokens[parser->toksuper].size++;
  #ifdef JSMN_PARENT_LINKS
  				token->parent = parser->toksuper;
  #endif
  			}
  			token->type = (c == '{' ? JSMN_OBJECT : JSMN_ARRAY);
  			token->start = parser->pos;
  			parser->toksuper = parser->toknext - 1;
  			break;
  		case '}': case ']':
  			if (tokens == NULL)
  				break;
  			type = (c == '}' ? JSMN_OBJECT : JSMN_ARRAY);
  #ifdef JSMN_PARENT_LINKS
  			if (parser->toknext < 1) {
  				return JSMN_ERROR_INVAL;
  			}
  			token = &tokens[parser->toknext - 1];
  			for (;;) {
  				if (token->start != -1 && token->end == -1) {
  					if (token->type != type) {
  						return JSMN_ERROR_INVAL;
  					}
  					token->end = parser->pos + 1;
  					parser->toksuper = token->parent;
  					break;
  				}
  				if (token->parent == -1) {
  					if(token->type != type || parser->toksuper == -1) {
  						return JSMN_ERROR_INVAL;
  					}
  					break;
  				}
  				token = &tokens[token->parent];
  			}
  #else
  			for (i = parser->toknext - 1; i >= 0; i--) {
  				token = &tokens[i];
  				if (token->start != -1 && token->end == -1) {
  					if (token->type != type) {
  						return JSMN_ERROR_INVAL;
  					}
  					parser->toksuper = -1;
  					token->end = parser->pos + 1;
  					break;
  				}
  			}
  			/* Error if unmatched closing bracket */
  			if (i == -1) return JSMN_ERROR_INVAL;
  			for (; i >= 0; i--) {
  				token = &tokens[i];
  				if (token->start != -1 && token->end == -1) {
  					parser->toksuper = i;
  					break;
  				}
  			}
  #endif
  			break;
  		case '\"':
  			r = jsmn_parse_string(parser, js, len, tokens, num_tokens);
  			if (r < 0) return r;
  			count++;
  			if (parser->toksuper != -1 && tokens != NULL)
  				tokens[parser->toksuper].size++;
  			break;
  		case '\t' : case '\r' : case '\n' : case ' ':
  			break;
  		case ':':
  			parser->toksuper = parser->toknext - 1;
  			break;
  		case ',':
  			if (tokens != NULL && parser->toksuper != -1 &&
  					tokens[parser->toksuper].type != JSMN_ARRAY &&
  					tokens[parser->toksuper].type != JSMN_OBJECT) {
  #ifdef JSMN_PARENT_LINKS
  				parser->toksuper = tokens[parser->toksuper].parent;
  #else
  				for (i = parser->toknext - 1; i >= 0; i--) {
  					if (tokens[i].type == JSMN_ARRAY || tokens[i].type == JSMN_OBJECT) {
  						if (tokens[i].start != -1 && tokens[i].end == -1) {
  							parser->toksuper = i;
  							break;
  						}
  					}
  				}
  #endif
  			}
  			break;
  #ifdef JSMN_STRICT
  			/* In strict mode primitives are: numbers and booleans */
  		case '-': case '0': case '1' : case '2': case '3' : case '4':
  		case '5': case '6': case '7' : case '8': case '9':
  		case 't': case 'f': case 'n' :
  			/* And they must not be keys of the object */
  			if (tokens != NULL && parser->toksuper != -1) {
  				jsmntok_t *t = &tokens[parser->toksuper];
  				if (t->type == JSMN_OBJECT ||
  						(t->type == JSMN_STRING && t->size != 0)) {
  					return JSMN_ERROR_INVAL;
  				}
  			}
  #else
  			/* In non-strict mode every unquoted value is a primitive */
  		default:
  #endif
  			r = jsmn_parse_primitive(parser, js, len, tokens, num_tokens);
  			if (r < 0) return r;
  			count++;
  			if (parser->toksuper != -1 && tokens != NULL)
  				tokens[parser->toksuper].size++;
  			break;
  
  #ifdef JSMN_STRICT
  			/* Unexpected char in strict mode */
  		default:
  			return JSMN_ERROR_INVAL;
  #endif
  		}
  	}
  
  	if (tokens != NULL) {
  		for (i = parser->toknext - 1; i >= 0; i--) {
  			/* Unmatched opened object or array */
  			if (tokens[i].start != -1 && tokens[i].end == -1) {
  				return JSMN_ERROR_PART;
  			}
  		}
  	}
  
  	return count;
  }
  
  /**
   * Creates a new parser based over a given  buffer with an array of tokens
   * available.
   */
  static void jsmn_init(jsmn_parser *parser) {
  	parser->pos = 0;
  	parser->toknext = 0;
  	parser->toksuper = -1;
  }
  /*
   * -- jsmn.c end --
   */
  
  #endif /* #ifdef CGLTF_IMPLEMENTATION */
  
  /* cgltf is distributed under MIT license:
   *
   * Copyright (c) 2018 Johannes Kuhlmann
  
   * Permission is hereby granted, free of charge, to any person obtaining a copy
   * of this software and associated documentation files (the "Software"), to deal
   * in the Software without restriction, including without limitation the rights
   * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
   * copies of the Software, and to permit persons to whom the Software is
   * furnished to do so, subject to the following conditions:
  
   * The above copyright notice and this permission notice shall be included in all
   * copies or substantial portions of the Software.
  
   * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
   * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
   * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
   * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
   * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
   * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
   * SOFTWARE.
   */
  