text: /**
   * cgltf_write - a single-file glTF 2.0 writer written in C99.
   *
   * Version: 1.12
   *
   * 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_WRITE_IMPLEMENTATION` before including this file to get the
   * function definitions.
   *
   * Reference:
   * `cgltf_result cgltf_write_file(const cgltf_options* options, const char*
   * path, const cgltf_data* data)` writes JSON to the given file path. Buffer
   * files and external images are not written out. `data` is not deallocated.
   *
   * `cgltf_size cgltf_write(const cgltf_options* options, char* buffer,
   * cgltf_size size, const cgltf_data* data)` writes JSON into the given memory
   * buffer. Returns the number of bytes written to `buffer`, including a null
   * terminator. If buffer is null, returns the number of bytes that would have
   * been written. `data` is not deallocated.
   *
   * To write custom JSON into the `extras` field, aggregate all the custom JSON
   * into a single buffer, then set `file_data` to this buffer. By supplying
   * start_offset and end_offset values for various objects, you can select a
   * range of characters within the aggregated buffer.
   */
  #ifndef CGLTF_WRITE_H_INCLUDED__
  #define CGLTF_WRITE_H_INCLUDED__
  
  #include "cgltf.h"
  
  #include <stddef.h>
  #include <stdbool.h>
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  cgltf_result cgltf_write_file(const cgltf_options* options, const char* path, const cgltf_data* data);
  cgltf_size cgltf_write(const cgltf_options* options, char* buffer, cgltf_size size, const cgltf_data* data);
  
  #ifdef __cplusplus
  }
  #endif
  
  #endif /* #ifndef CGLTF_WRITE_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_WRITE_IMPLEMENTATION
  #endif
  
  #ifdef CGLTF_WRITE_IMPLEMENTATION
  
  #include <assert.h>
  #include <stdio.h>
  #include <stdint.h>
  #include <stdlib.h>
  #include <string.h>
  #include <float.h>
  
  #define CGLTF_EXTENSION_FLAG_TEXTURE_TRANSFORM      (1 << 0)
  #define CGLTF_EXTENSION_FLAG_MATERIALS_UNLIT        (1 << 1)
  #define CGLTF_EXTENSION_FLAG_SPECULAR_GLOSSINESS    (1 << 2)
  #define CGLTF_EXTENSION_FLAG_LIGHTS_PUNCTUAL        (1 << 3)
  #define CGLTF_EXTENSION_FLAG_DRACO_MESH_COMPRESSION (1 << 4)
  #define CGLTF_EXTENSION_FLAG_MATERIALS_CLEARCOAT    (1 << 5)
  #define CGLTF_EXTENSION_FLAG_MATERIALS_IOR          (1 << 6)
  #define CGLTF_EXTENSION_FLAG_MATERIALS_SPECULAR     (1 << 7)
  #define CGLTF_EXTENSION_FLAG_MATERIALS_TRANSMISSION (1 << 8)
  #define CGLTF_EXTENSION_FLAG_MATERIALS_SHEEN        (1 << 9)
  #define CGLTF_EXTENSION_FLAG_MATERIALS_VARIANTS     (1 << 10)
  #define CGLTF_EXTENSION_FLAG_MATERIALS_VOLUME       (1 << 11)
  #define CGLTF_EXTENSION_FLAG_TEXTURE_BASISU        (1 << 12)
  #define CGLTF_EXTENSION_FLAG_MATERIALS_EMISSIVE_STRENGTH (1 << 13)
  #define CGLTF_EXTENSION_FLAG_MESH_GPU_INSTANCING (1 << 14)
  #define CGLTF_EXTENSION_FLAG_MATERIALS_IRIDESCENCE (1 << 15)
  
  typedef struct {
  	char* buffer;
  	cgltf_size buffer_size;
  	cgltf_size remaining;
  	char* cursor;
  	cgltf_size tmp;
  	cgltf_size chars_written;
  	const cgltf_data* data;
  	int depth;
  	const char* indent;
  	int needs_comma;
  	uint32_t extension_flags;
  	uint32_t required_extension_flags;
  } cgltf_write_context;
  
  #define CGLTF_MIN(a, b) (a < b ? a : b)
  
  #ifdef FLT_DECIMAL_DIG
  	// FLT_DECIMAL_DIG is C11
  	#define CGLTF_DECIMAL_DIG (FLT_DECIMAL_DIG)
  #else
  	#define CGLTF_DECIMAL_DIG 9
  #endif
  
  #define CGLTF_SPRINTF(...) { \
  		assert(context->cursor || (!context->cursor && context->remaining == 0)); \
  		context->tmp = snprintf ( context->cursor, context->remaining, __VA_ARGS__ ); \
  		context->chars_written += context->tmp; \
  		if (context->cursor) { \
  			context->cursor += context->tmp; \
  			context->remaining -= context->tmp; \
  		} }
  
  #define CGLTF_SNPRINTF(length, ...) { \
  		assert(context->cursor || (!context->cursor && context->remaining == 0)); \
  		context->tmp = snprintf ( context->cursor, CGLTF_MIN(length + 1, context->remaining), __VA_ARGS__ ); \
  		context->chars_written += length; \
  		if (context->cursor) { \
  			context->cursor += length; \
  			context->remaining -= length; \
  		} }
  
  #define CGLTF_WRITE_IDXPROP(label, val, start) if (val) { \
  		cgltf_write_indent(context); \
  		CGLTF_SPRINTF("\"%s\": %d", label, (int) (val - start)); \
  		context->needs_comma = 1; }
  
  #define CGLTF_WRITE_IDXARRPROP(label, dim, vals, start) if (vals) { \
  		cgltf_write_indent(context); \
  		CGLTF_SPRINTF("\"%s\": [", label); \
  		for (int i = 0; i < (int)(dim); ++i) { \
  			int idx = (int) (vals[i] - start); \
  			if (i != 0) CGLTF_SPRINTF(","); \
  			CGLTF_SPRINTF(" %d", idx); \
  		} \
  		CGLTF_SPRINTF(" ]"); \
  		context->needs_comma = 1; }
  
  #define CGLTF_WRITE_TEXTURE_INFO(label, info) if (info.texture) { \
  		cgltf_write_line(context, "\"" label "\": {"); \
  		CGLTF_WRITE_IDXPROP("index", info.texture, context->data->textures); \
  		cgltf_write_intprop(context, "texCoord", info.texcoord, 0); \
  		cgltf_write_floatprop(context, "scale", info.scale, 1.0f); \
  		if (info.has_transform) { \
  			context->extension_flags |= CGLTF_EXTENSION_FLAG_TEXTURE_TRANSFORM; \
  			cgltf_write_texture_transform(context, &info.transform); \
  		} \
  		cgltf_write_extras(context, &info.extras); \
  		cgltf_write_line(context, "}"); }
  
  static void cgltf_write_indent(cgltf_write_context* context)
  {
  	if (context->needs_comma)
  	{
  		CGLTF_SPRINTF(",\n");
  		context->needs_comma = 0;
  	}
  	else
  	{
  		CGLTF_SPRINTF("\n");
  	}
  	for (int i = 0; i < context->depth; ++i)
  	{
  		CGLTF_SPRINTF("%s", context->indent);
  	}
  }
  
  static void cgltf_write_line(cgltf_write_context* context, const char* line)
  {
  	if (line[0] == ']' || line[0] == '}')
  	{
  		--context->depth;
  		context->needs_comma = 0;
  	}
  	cgltf_write_indent(context);
  	CGLTF_SPRINTF("%s", line);
  	cgltf_size last = (cgltf_size)(strlen(line) - 1);
  	if (line[0] == ']' || line[0] == '}')
  	{
  		context->needs_comma = 1;
  	}
  	if (line[last] == '[' || line[last] == '{')
  	{
  		++context->depth;
  		context->needs_comma = 0;
  	}
  }
  
  static void cgltf_write_strprop(cgltf_write_context* context, const char* label, const char* val)
  {
  	if (val)
  	{
  		cgltf_write_indent(context);
  		CGLTF_SPRINTF("\"%s\": \"%s\"", label, val);
  		context->needs_comma = 1;
  	}
  }
  
  static void cgltf_write_extras(cgltf_write_context* context, const cgltf_extras* extras)
  {
  	cgltf_size length = extras->end_offset - extras->start_offset;
  	if (length > 0 && context->data->file_data)
  	{
  		char* json_string = ((char*) context->data->file_data) + extras->start_offset;
  		cgltf_write_indent(context);
  		CGLTF_SPRINTF("%s", "\"extras\": ");
  		CGLTF_SNPRINTF(length, "%.*s", (int)(extras->end_offset - extras->start_offset), json_string);
  		context->needs_comma = 1;
  	}
  }
  
  static void cgltf_write_stritem(cgltf_write_context* context, const char* item)
  {
  	cgltf_write_indent(context);
  	CGLTF_SPRINTF("\"%s\"", item);
  	context->needs_comma = 1;
  }
  
  static void cgltf_write_intprop(cgltf_write_context* context, const char* label, int val, int def)
  {
  	if (val != def)
  	{
  		cgltf_write_indent(context);
  		CGLTF_SPRINTF("\"%s\": %d", label, val);
  		context->needs_comma = 1;
  	}
  }
  
  static void cgltf_write_sizeprop(cgltf_write_context* context, const char* label, cgltf_size val, cgltf_size def)
  {
  	if (val != def)
  	{
  		cgltf_write_indent(context);
  		CGLTF_SPRINTF("\"%s\": %zu", label, val);
  		context->needs_comma = 1;
  	}
  }
  
  static void cgltf_write_floatprop(cgltf_write_context* context, const char* label, float val, float def)
  {
  	if (val != def)
  	{
  		cgltf_write_indent(context);
  		CGLTF_SPRINTF("\"%s\": ", label);
  		CGLTF_SPRINTF("%.*g", CGLTF_DECIMAL_DIG, val);
  		context->needs_comma = 1;
  
  		if (context->cursor)
  		{
  			char *decimal_comma = strchr(context->cursor - context->tmp, ',');
  			if (decimal_comma)
  			{
  				*decimal_comma = '.';
  			}
  		}
  	}
  }
  
  static void cgltf_write_boolprop_optional(cgltf_write_context* context, const char* label, bool val, bool def)
  {
  	if (val != def)
  	{
  		cgltf_write_indent(context);
  		CGLTF_SPRINTF("\"%s\": %s", label, val ? "true" : "false");
  		context->needs_comma = 1;
  	}
  }
  
  static void cgltf_write_floatarrayprop(cgltf_write_context* context, const char* label, const cgltf_float* vals, cgltf_size dim)
  {
  	cgltf_write_indent(context);
  	CGLTF_SPRINTF("\"%s\": [", label);
  	for (cgltf_size i = 0; i < dim; ++i)
  	{
  		if (i != 0)
  		{
  			CGLTF_SPRINTF(", %.*g", CGLTF_DECIMAL_DIG, vals[i]);
  		}
  		else
  		{
  			CGLTF_SPRINTF("%.*g", CGLTF_DECIMAL_DIG, vals[i]);
  		}
  	}
  	CGLTF_SPRINTF("]");
  	context->needs_comma = 1;
  }
  
  static bool cgltf_check_floatarray(const float* vals, int dim, float val) {
  	while (dim--)
  	{
  		if (vals[dim] != val)
  		{
  			return true;
  		}
  	}
  	return false;
  }
  
  static int cgltf_int_from_component_type(cgltf_component_type ctype)
  {
  	switch (ctype)
  	{
  		case cgltf_component_type_r_8: return 5120;
  		case cgltf_component_type_r_8u: return 5121;
  		case cgltf_component_type_r_16: return 5122;
  		case cgltf_component_type_r_16u: return 5123;
  		case cgltf_component_type_r_32u: return 5125;
  		case cgltf_component_type_r_32f: return 5126;
  		default: return 0;
  	}
  }
  
  static const char* cgltf_str_from_alpha_mode(cgltf_alpha_mode alpha_mode)
  {
  	switch (alpha_mode)
  	{
  		case cgltf_alpha_mode_mask: return "MASK";
  		case cgltf_alpha_mode_blend: return "BLEND";
  		default: return NULL;
  	}
  }
  
  static const char* cgltf_str_from_type(cgltf_type type)
  {
  	switch (type)
  	{
  		case cgltf_type_scalar: return "SCALAR";
  		case cgltf_type_vec2: return "VEC2";
  		case cgltf_type_vec3: return "VEC3";
  		case cgltf_type_vec4: return "VEC4";
  		case cgltf_type_mat2: return "MAT2";
  		case cgltf_type_mat3: return "MAT3";
  		case cgltf_type_mat4: return "MAT4";
  		default: return NULL;
  	}
  }
  
  static cgltf_size cgltf_dim_from_type(cgltf_type type)
  {
  	switch (type)
  	{
  		case cgltf_type_scalar: return 1;
  		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;
  		default: return 0;
  	}
  }
  
  static const char* cgltf_str_from_camera_type(cgltf_camera_type camera_type)
  {
  	switch (camera_type)
  	{
  		case cgltf_camera_type_perspective: return "perspective";
  		case cgltf_camera_type_orthographic: return "orthographic";
  		default: return NULL;
  	}
  }
  
  static const char* cgltf_str_from_light_type(cgltf_light_type light_type)
  {
  	switch (light_type)
  	{
  		case cgltf_light_type_directional: return "directional";
  		case cgltf_light_type_point: return "point";
  		case cgltf_light_type_spot: return "spot";
  		default: return NULL;
  	}
  }
  
  static void cgltf_write_texture_transform(cgltf_write_context* context, const cgltf_texture_transform* transform)
  {
  	cgltf_write_line(context, "\"extensions\": {");
  	cgltf_write_line(context, "\"KHR_texture_transform\": {");
  	if (cgltf_check_floatarray(transform->offset, 2, 0.0f))
  	{
  		cgltf_write_floatarrayprop(context, "offset", transform->offset, 2);
  	}
  	cgltf_write_floatprop(context, "rotation", transform->rotation, 0.0f);
  	if (cgltf_check_floatarray(transform->scale, 2, 1.0f))
  	{
  		cgltf_write_floatarrayprop(context, "scale", transform->scale, 2);
  	}
  	if (transform->has_texcoord)
  	{
  		cgltf_write_intprop(context, "texCoord", transform->texcoord, -1);
  	}
  	cgltf_write_line(context, "}");
  	cgltf_write_line(context, "}");
  }
  
  static void cgltf_write_asset(cgltf_write_context* context, const cgltf_asset* asset)
  {
  	cgltf_write_line(context, "\"asset\": {");
  	cgltf_write_strprop(context, "copyright", asset->copyright);
  	cgltf_write_strprop(context, "generator", asset->generator);
  	cgltf_write_strprop(context, "version", asset->version);
  	cgltf_write_strprop(context, "min_version", asset->min_version);
  	cgltf_write_extras(context, &asset->extras);
  	cgltf_write_line(context, "}");
  }
  
  static void cgltf_write_primitive(cgltf_write_context* context, const cgltf_primitive* prim)
  {
  	cgltf_write_intprop(context, "mode", (int) prim->type, 4);
  	CGLTF_WRITE_IDXPROP("indices", prim->indices, context->data->accessors);
  	CGLTF_WRITE_IDXPROP("material", prim->material, context->data->materials);
  	cgltf_write_line(context, "\"attributes\": {");
  	for (cgltf_size i = 0; i < prim->attributes_count; ++i)
  	{
  		const cgltf_attribute* attr = prim->attributes + i;
  		CGLTF_WRITE_IDXPROP(attr->name, attr->data, context->data->accessors);
  	}
  	cgltf_write_line(context, "}");
  
  	if (prim->targets_count)
  	{
  		cgltf_write_line(context, "\"targets\": [");
  		for (cgltf_size i = 0; i < prim->targets_count; ++i)
  		{
  			cgltf_write_line(context, "{");
  			for (cgltf_size j = 0; j < prim->targets[i].attributes_count; ++j)
  			{
  				const cgltf_attribute* attr = prim->targets[i].attributes + j;
  				CGLTF_WRITE_IDXPROP(attr->name, attr->data, context->data->accessors);
  			}
  			cgltf_write_line(context, "}");
  		}
  		cgltf_write_line(context, "]");
  	}
  	cgltf_write_extras(context, &prim->extras);
  
  	if (prim->has_draco_mesh_compression || prim->mappings_count > 0)
  	{
  		cgltf_write_line(context, "\"extensions\": {");
  
  		if (prim->has_draco_mesh_compression)
  		{
  			context->extension_flags |= CGLTF_EXTENSION_FLAG_DRACO_MESH_COMPRESSION;
  			if (prim->attributes_count == 0 || prim->indices == 0)
  			{
  				context->required_extension_flags |= CGLTF_EXTENSION_FLAG_DRACO_MESH_COMPRESSION;				 
  			}
  
  			cgltf_write_line(context, "\"KHR_draco_mesh_compression\": {");
  			CGLTF_WRITE_IDXPROP("bufferView", prim->draco_mesh_compression.buffer_view, context->data->buffer_views);
  			cgltf_write_line(context, "\"attributes\": {");
  			for (cgltf_size i = 0; i < prim->draco_mesh_compression.attributes_count; ++i)
  			{
  				const cgltf_attribute* attr = prim->draco_mesh_compression.attributes + i;
  				CGLTF_WRITE_IDXPROP(attr->name, attr->data, context->data->accessors);
  			}
  			cgltf_write_line(context, "}");
  			cgltf_write_line(context, "}");
  		}
  
  		if (prim->mappings_count > 0)
  		{
  			context->extension_flags |= CGLTF_EXTENSION_FLAG_MATERIALS_VARIANTS;
  			cgltf_write_line(context, "\"KHR_materials_variants\": {");
  			cgltf_write_line(context, "\"mappings\": [");
  			for (cgltf_size i = 0; i < prim->mappings_count; ++i)
  			{
  				const cgltf_material_mapping* map = prim->mappings + i;
  				cgltf_write_line(context, "{");
  				CGLTF_WRITE_IDXPROP("material", map->material, context->data->materials);
  
  				cgltf_write_indent(context);
  				CGLTF_SPRINTF("\"variants\": [%d]", (int)map->variant);
  				context->needs_comma = 1;
  
  				cgltf_write_extras(context, &map->extras);
  				cgltf_write_line(context, "}");
  			}
  			cgltf_write_line(context, "]");
  			cgltf_write_line(context, "}");
  		}
  
  		cgltf_write_line(context, "}");
  	}
  }
  
  static void cgltf_write_mesh(cgltf_write_context* context, const cgltf_mesh* mesh)
  {
  	cgltf_write_line(context, "{");
  	cgltf_write_strprop(context, "name", mesh->name);
  
  	cgltf_write_line(context, "\"primitives\": [");
  	for (cgltf_size i = 0; i < mesh->primitives_count; ++i)
  	{
  		cgltf_write_line(context, "{");
  		cgltf_write_primitive(context, mesh->primitives + i);
  		cgltf_write_line(context, "}");
  	}
  	cgltf_write_line(context, "]");
  
  	if (mesh->weights_count > 0)
  	{
  		cgltf_write_floatarrayprop(context, "weights", mesh->weights, mesh->weights_count);
  	}
  
  	cgltf_write_extras(context, &mesh->extras);
  	cgltf_write_line(context, "}");
  }
  
  static void cgltf_write_buffer_view(cgltf_write_context* context, const cgltf_buffer_view* view)
  {
  	cgltf_write_line(context, "{");
  	cgltf_write_strprop(context, "name", view->name);
  	CGLTF_WRITE_IDXPROP("buffer", view->buffer, context->data->buffers);
  	cgltf_write_sizeprop(context, "byteLength", view->size, (cgltf_size)-1);
  	cgltf_write_sizeprop(context, "byteOffset", view->offset, 0);
  	cgltf_write_sizeprop(context, "byteStride", view->stride, 0);
  	// NOTE: We skip writing "target" because the spec says its usage can be inferred.
  	cgltf_write_extras(context, &view->extras);
  	cgltf_write_line(context, "}");
  }
  
  
  static void cgltf_write_buffer(cgltf_write_context* context, const cgltf_buffer* buffer)
  {
  	cgltf_write_line(context, "{");
  	cgltf_write_strprop(context, "name", buffer->name);
  	cgltf_write_strprop(context, "uri", buffer->uri);
  	cgltf_write_sizeprop(context, "byteLength", buffer->size, (cgltf_size)-1);
  	cgltf_write_extras(context, &buffer->extras);
  	cgltf_write_line(context, "}");
  }
  
  static void cgltf_write_material(cgltf_write_context* context, const cgltf_material* material)
  {
  	cgltf_write_line(context, "{");
  	cgltf_write_strprop(context, "name", material->name);
  	if (material->alpha_mode == cgltf_alpha_mode_mask)
  	{
  		cgltf_write_floatprop(context, "alphaCutoff", material->alpha_cutoff, 0.5f);
  	}
  	cgltf_write_boolprop_optional(context, "doubleSided", (bool)material->double_sided, false);
  	// cgltf_write_boolprop_optional(context, "unlit", material->unlit, false);
  
  	if (material->unlit)
  	{
  		context->extension_flags |= CGLTF_EXTENSION_FLAG_MATERIALS_UNLIT;
  	}
  
  	if (material->has_pbr_specular_glossiness)
  	{
  		context->extension_flags |= CGLTF_EXTENSION_FLAG_SPECULAR_GLOSSINESS;
  	}
  
  	if (material->has_clearcoat)
  	{
  		context->extension_flags |= CGLTF_EXTENSION_FLAG_MATERIALS_CLEARCOAT;
  	}
  
  	if (material->has_transmission)
  	{
  		context->extension_flags |= CGLTF_EXTENSION_FLAG_MATERIALS_TRANSMISSION;
  	}
  
  	if (material->has_volume)
  	{
  		context->extension_flags |= CGLTF_EXTENSION_FLAG_MATERIALS_VOLUME;
  	}
  
  	if (material->has_ior)
  	{
  		context->extension_flags |= CGLTF_EXTENSION_FLAG_MATERIALS_IOR;
  	}
  
  	if (material->has_specular)
  	{
  		context->extension_flags |= CGLTF_EXTENSION_FLAG_MATERIALS_SPECULAR;
  	}
  
  	if (material->has_sheen)
  	{
  		context->extension_flags |= CGLTF_EXTENSION_FLAG_MATERIALS_SHEEN;
  	}
  
  	if (material->has_emissive_strength)
  	{
  		context->extension_flags |= CGLTF_EXTENSION_FLAG_MATERIALS_EMISSIVE_STRENGTH;
  	}
  
  	if (material->has_iridescence)
  	{
  		context->extension_flags |= CGLTF_EXTENSION_FLAG_MATERIALS_IRIDESCENCE;
  	}
  
  	if (material->has_pbr_metallic_roughness)
  	{
  		const cgltf_pbr_metallic_roughness* params = &material->pbr_metallic_roughness;
  		cgltf_write_line(context, "\"pbrMetallicRoughness\": {");
  		CGLTF_WRITE_TEXTURE_INFO("baseColorTexture", params->base_color_texture);
  		CGLTF_WRITE_TEXTURE_INFO("metallicRoughnessTexture", params->metallic_roughness_texture);
  		cgltf_write_floatprop(context, "metallicFactor", params->metallic_factor, 1.0f);
  		cgltf_write_floatprop(context, "roughnessFactor", params->roughness_factor, 1.0f);
  		if (cgltf_check_floatarray(params->base_color_factor, 4, 1.0f))
  		{
  			cgltf_write_floatarrayprop(context, "baseColorFactor", params->base_color_factor, 4);
  		}
  		cgltf_write_extras(context, &params->extras);
  		cgltf_write_line(context, "}");
  	}
  
  	if (material->unlit || material->has_pbr_specular_glossiness || material->has_clearcoat || material->has_ior || material->has_specular || material->has_transmission || material->has_sheen || material->has_volume || material->has_emissive_strength || material->has_iridescence)
  	{
  		cgltf_write_line(context, "\"extensions\": {");
  		if (material->has_clearcoat)
  		{
  			const cgltf_clearcoat* params = &material->clearcoat;
  			cgltf_write_line(context, "\"KHR_materials_clearcoat\": {");
  			CGLTF_WRITE_TEXTURE_INFO("clearcoatTexture", params->clearcoat_texture);
  			CGLTF_WRITE_TEXTURE_INFO("clearcoatRoughnessTexture", params->clearcoat_roughness_texture);
  			CGLTF_WRITE_TEXTURE_INFO("clearcoatNormalTexture", params->clearcoat_normal_texture);
  			cgltf_write_floatprop(context, "clearcoatFactor", params->clearcoat_factor, 0.0f);
  			cgltf_write_floatprop(context, "clearcoatRoughnessFactor", params->clearcoat_roughness_factor, 0.0f);
  			cgltf_write_line(context, "}");
  		}
  		if (material->has_ior)
  		{
  			const cgltf_ior* params = &material->ior;
  			cgltf_write_line(context, "\"KHR_materials_ior\": {");
  			cgltf_write_floatprop(context, "ior", params->ior, 1.5f);
  			cgltf_write_line(context, "}");
  		}
  		if (material->has_specular)
  		{
  			const cgltf_specular* params = &material->specular;
  			cgltf_write_line(context, "\"KHR_materials_specular\": {");
  			CGLTF_WRITE_TEXTURE_INFO("specularTexture", params->specular_texture);
  			CGLTF_WRITE_TEXTURE_INFO("specularColorTexture", params->specular_color_texture);
  			cgltf_write_floatprop(context, "specularFactor", params->specular_factor, 1.0f);
  			if (cgltf_check_floatarray(params->specular_color_factor, 3, 1.0f))
  			{
  				cgltf_write_floatarrayprop(context, "specularColorFactor", params->specular_color_factor, 3);
  			}
  			cgltf_write_line(context, "}");
  		}
  		if (material->has_transmission)
  		{
  			const cgltf_transmission* params = &material->transmission;
  			cgltf_write_line(context, "\"KHR_materials_transmission\": {");
  			CGLTF_WRITE_TEXTURE_INFO("transmissionTexture", params->transmission_texture);
  			cgltf_write_floatprop(context, "transmissionFactor", params->transmission_factor, 0.0f);
  			cgltf_write_line(context, "}");
  		}
  		if (material->has_volume)
  		{
  			const cgltf_volume* params = &material->volume;
  			cgltf_write_line(context, "\"KHR_materials_volume\": {");
  			CGLTF_WRITE_TEXTURE_INFO("thicknessTexture", params->thickness_texture);
  			cgltf_write_floatprop(context, "thicknessFactor", params->thickness_factor, 0.0f);
  			if (cgltf_check_floatarray(params->attenuation_color, 3, 1.0f))
  			{
  				cgltf_write_floatarrayprop(context, "attenuationColor", params->attenuation_color, 3);
  			}
  			if (params->attenuation_distance < FLT_MAX) 
  			{
  				cgltf_write_floatprop(context, "attenuationDistance", params->attenuation_distance, FLT_MAX);
  			}
  			cgltf_write_line(context, "}");
  		}
  		if (material->has_sheen)
  		{
  			const cgltf_sheen* params = &material->sheen;
  			cgltf_write_line(context, "\"KHR_materials_sheen\": {");
  			CGLTF_WRITE_TEXTURE_INFO("sheenColorTexture", params->sheen_color_texture);
  			CGLTF_WRITE_TEXTURE_INFO("sheenRoughnessTexture", params->sheen_roughness_texture);
  			if (cgltf_check_floatarray(params->sheen_color_factor, 3, 0.0f))
  			{
  				cgltf_write_floatarrayprop(context, "sheenColorFactor", params->sheen_color_factor, 3);
  			}
  			cgltf_write_floatprop(context, "sheenRoughnessFactor", params->sheen_roughness_factor, 0.0f);
  			cgltf_write_line(context, "}");
  		}
  		if (material->has_pbr_specular_glossiness)
  		{
  			const cgltf_pbr_specular_glossiness* params = &material->pbr_specular_glossiness;
  			cgltf_write_line(context, "\"KHR_materials_pbrSpecularGlossiness\": {");
  			CGLTF_WRITE_TEXTURE_INFO("diffuseTexture", params->diffuse_texture);
  			CGLTF_WRITE_TEXTURE_INFO("specularGlossinessTexture", params->specular_glossiness_texture);
  			if (cgltf_check_floatarray(params->diffuse_factor, 4, 1.0f))
  			{
  				cgltf_write_floatarrayprop(context, "diffuseFactor", params->diffuse_factor, 4);
  			}
  			if (cgltf_check_floatarray(params->specular_factor, 3, 1.0f))
  			{
  				cgltf_write_floatarrayprop(context, "specularFactor", params->specular_factor, 3);
  			}
  			cgltf_write_floatprop(context, "glossinessFactor", params->glossiness_factor, 1.0f);
  			cgltf_write_line(context, "}");
  		}
  		if (material->unlit)
  		{
  			cgltf_write_line(context, "\"KHR_materials_unlit\": {}");
  		}
  		if (material->has_emissive_strength)
  		{
  			cgltf_write_line(context, "\"KHR_materials_emissive_strength\": {");
  			const cgltf_emissive_strength* params = &material->emissive_strength;
  			cgltf_write_floatprop(context, "emissiveStrength", params->emissive_strength, 1.f);
  			cgltf_write_line(context, "}");
  		}
  		if (material->has_iridescence)
  		{
  			cgltf_write_line(context, "\"KHR_materials_iridescence\": {");
  			const cgltf_iridescence* params = &material->iridescence;
  			cgltf_write_floatprop(context, "iridescenceFactor", params->iridescence_factor, 0.f);
  			CGLTF_WRITE_TEXTURE_INFO("iridescenceTexture", params->iridescence_texture);
  			cgltf_write_floatprop(context, "iridescenceIor", params->iridescence_ior, 1.3f);
  			cgltf_write_floatprop(context, "iridescenceThicknessMinimum", params->iridescence_thickness_min, 100.f);
  			cgltf_write_floatprop(context, "iridescenceThicknessMaximum", params->iridescence_thickness_max, 400.f);
  			CGLTF_WRITE_TEXTURE_INFO("iridescenceThicknessTexture", params->iridescence_thickness_texture);
  			cgltf_write_line(context, "}");
  		}
  		cgltf_write_line(context, "}");
  	}
  
  	CGLTF_WRITE_TEXTURE_INFO("normalTexture", material->normal_texture);
  	CGLTF_WRITE_TEXTURE_INFO("occlusionTexture", material->occlusion_texture);
  	CGLTF_WRITE_TEXTURE_INFO("emissiveTexture", material->emissive_texture);
  	if (cgltf_check_floatarray(material->emissive_factor, 3, 0.0f))
  	{
  		cgltf_write_floatarrayprop(context, "emissiveFactor", material->emissive_factor, 3);
  	}
  	cgltf_write_strprop(context, "alphaMode", cgltf_str_from_alpha_mode(material->alpha_mode));
  	cgltf_write_extras(context, &material->extras);
  	cgltf_write_line(context, "}");
  }
  
  static void cgltf_write_image(cgltf_write_context* context, const cgltf_image* image)
  {
  	cgltf_write_line(context, "{");
  	cgltf_write_strprop(context, "name", image->name);
  	cgltf_write_strprop(context, "uri", image->uri);
  	CGLTF_WRITE_IDXPROP("bufferView", image->buffer_view, context->data->buffer_views);
  	cgltf_write_strprop(context, "mimeType", image->mime_type);
  	cgltf_write_extras(context, &image->extras);
  	cgltf_write_line(context, "}");
  }
  
  static void cgltf_write_texture(cgltf_write_context* context, const cgltf_texture* texture)
  {
  	cgltf_write_line(context, "{");
  	cgltf_write_strprop(context, "name", texture->name);
  	CGLTF_WRITE_IDXPROP("source", texture->image, context->data->images);
  	CGLTF_WRITE_IDXPROP("sampler", texture->sampler, context->data->samplers);
  
  	if (texture->has_basisu)
  	{
  		cgltf_write_line(context, "\"extensions\": {");
  		{
  			context->extension_flags |= CGLTF_EXTENSION_FLAG_TEXTURE_BASISU;
  			cgltf_write_line(context, "\"KHR_texture_basisu\": {");
  			CGLTF_WRITE_IDXPROP("source", texture->basisu_image, context->data->images);
  			cgltf_write_line(context, "}");
  		}
  		cgltf_write_line(context, "}");
  	}
  	cgltf_write_extras(context, &texture->extras);
  	cgltf_write_line(context, "}");
  }
  
  static void cgltf_write_skin(cgltf_write_context* context, const cgltf_skin* skin)
  {
  	cgltf_write_line(context, "{");
  	CGLTF_WRITE_IDXPROP("skeleton", skin->skeleton, context->data->nodes);
  	CGLTF_WRITE_IDXPROP("inverseBindMatrices", skin->inverse_bind_matrices, context->data->accessors);
  	CGLTF_WRITE_IDXARRPROP("joints", skin->joints_count, skin->joints, context->data->nodes);
  	cgltf_write_strprop(context, "name", skin->name);
  	cgltf_write_extras(context, &skin->extras);
  	cgltf_write_line(context, "}");
  }
  
  static const char* cgltf_write_str_path_type(cgltf_animation_path_type path_type)
  {
  	switch (path_type)
  	{
  	case cgltf_animation_path_type_translation:
  		return "translation";
  	case cgltf_animation_path_type_rotation:
  		return "rotation";
  	case cgltf_animation_path_type_scale:
  		return "scale";
  	case cgltf_animation_path_type_weights:
  		return "weights";
  	default:
  		break;
  	}
  	return "invalid";
  }
  
  static const char* cgltf_write_str_interpolation_type(cgltf_interpolation_type interpolation_type)
  {
  	switch (interpolation_type)
  	{
  	case cgltf_interpolation_type_linear:
  		return "LINEAR";
  	case cgltf_interpolation_type_step:
  		return "STEP";
  	case cgltf_interpolation_type_cubic_spline:
  		return "CUBICSPLINE";
  	default:
  		break;
  	}
  	return "invalid";
  }
  
  static void cgltf_write_path_type(cgltf_write_context* context, const char *label, cgltf_animation_path_type path_type)
  {
  	cgltf_write_strprop(context, label, cgltf_write_str_path_type(path_type));
  }
  
  static void cgltf_write_interpolation_type(cgltf_write_context* context, const char *label, cgltf_interpolation_type interpolation_type)
  {
  	cgltf_write_strprop(context, label, cgltf_write_str_interpolation_type(interpolation_type));
  }
  
  static void cgltf_write_animation_sampler(cgltf_write_context* context, const cgltf_animation_sampler* animation_sampler)
  {
  	cgltf_write_line(context, "{");
  	cgltf_write_interpolation_type(context, "interpolation", animation_sampler->interpolation);
  	CGLTF_WRITE_IDXPROP("input", animation_sampler->input, context->data->accessors);
  	CGLTF_WRITE_IDXPROP("output", animation_sampler->output, context->data->accessors);
  	cgltf_write_extras(context, &animation_sampler->extras);
  	cgltf_write_line(context, "}");
  }
  
  static void cgltf_write_animation_channel(cgltf_write_context* context, const cgltf_animation* animation, const cgltf_animation_channel* animation_channel)
  {
  	cgltf_write_line(context, "{");
  	CGLTF_WRITE_IDXPROP("sampler", animation_channel->sampler, animation->samplers);
  	cgltf_write_line(context, "\"target\": {");
  	CGLTF_WRITE_IDXPROP("node", animation_channel->target_node, context->data->nodes);
  	cgltf_write_path_type(context, "path", animation_channel->target_path);
  	cgltf_write_line(context, "}");
  	cgltf_write_extras(context, &animation_channel->extras);
  	cgltf_write_line(context, "}");
  }
  
  static void cgltf_write_animation(cgltf_write_context* context, const cgltf_animation* animation)
  {
  	cgltf_write_line(context, "{");
  	cgltf_write_strprop(context, "name", animation->name);
  
  	if (animation->samplers_count > 0)
  	{
  		cgltf_write_line(context, "\"samplers\": [");
  		for (cgltf_size i = 0; i < animation->samplers_count; ++i)
  		{
  			cgltf_write_animation_sampler(context, animation->samplers + i);
  		}
  		cgltf_write_line(context, "]");
  	}
  	if (animation->channels_count > 0)
  	{
  		cgltf_write_line(context, "\"channels\": [");
  		for (cgltf_size i = 0; i < animation->channels_count; ++i)
  		{
  			cgltf_write_animation_channel(context, animation, animation->channels + i);
  		}
  		cgltf_write_line(context, "]");
  	}
  	cgltf_write_extras(context, &animation->extras);
  	cgltf_write_line(context, "}");
  }
  
  static void cgltf_write_sampler(cgltf_write_context* context, const cgltf_sampler* sampler)
  {
  	cgltf_write_line(context, "{");
  	cgltf_write_strprop(context, "name", sampler->name);
  	cgltf_write_intprop(context, "magFilter", sampler->mag_filter, 0);
  	cgltf_write_intprop(context, "minFilter", sampler->min_filter, 0);
  	cgltf_write_intprop(context, "wrapS", sampler->wrap_s, 10497);
  	cgltf_write_intprop(context, "wrapT", sampler->wrap_t, 10497);
  	cgltf_write_extras(context, &sampler->extras);
  	cgltf_write_line(context, "}");
  }
  
  static void cgltf_write_node(cgltf_write_context* context, const cgltf_node* node)
  {
  	cgltf_write_line(context, "{");
  	CGLTF_WRITE_IDXARRPROP("children", node->children_count, node->children, context->data->nodes);
  	CGLTF_WRITE_IDXPROP("mesh", node->mesh, context->data->meshes);
  	cgltf_write_strprop(context, "name", node->name);
  	if (node->has_matrix)
  	{
  		cgltf_write_floatarrayprop(context, "matrix", node->matrix, 16);
  	}
  	if (node->has_translation)
  	{
  		cgltf_write_floatarrayprop(context, "translation", node->translation, 3);
  	}
  	if (node->has_rotation)
  	{
  		cgltf_write_floatarrayprop(context, "rotation", node->rotation, 4);
  	}
  	if (node->has_scale)
  	{
  		cgltf_write_floatarrayprop(context, "scale", node->scale, 3);
  	}
  	if (node->skin)
  	{
  		CGLTF_WRITE_IDXPROP("skin", node->skin, context->data->skins);
  	}
  
  	bool has_extension = node->light || (node->has_mesh_gpu_instancing && node->mesh_gpu_instancing.attributes_count > 0);
  	if(has_extension)
  		cgltf_write_line(context, "\"extensions\": {");
  
  	if (node->light)
  	{
  		context->extension_flags |= CGLTF_EXTENSION_FLAG_LIGHTS_PUNCTUAL;
  		cgltf_write_line(context, "\"KHR_lights_punctual\": {");
  		CGLTF_WRITE_IDXPROP("light", node->light, context->data->lights);
  		cgltf_write_line(context, "}");
  	}
  
  	if (node->has_mesh_gpu_instancing && node->mesh_gpu_instancing.attributes_count > 0)
  	{
  		context->extension_flags |= CGLTF_EXTENSION_FLAG_MESH_GPU_INSTANCING;
  		context->required_extension_flags |= CGLTF_EXTENSION_FLAG_MESH_GPU_INSTANCING;
  
  		cgltf_write_line(context, "\"EXT_mesh_gpu_instancing\": {");
  		{
  			CGLTF_WRITE_IDXPROP("bufferView", node->mesh_gpu_instancing.buffer_view, context->data->buffer_views);
  			cgltf_write_line(context, "\"attributes\": {");
  			{
  				for (cgltf_size i = 0; i < node->mesh_gpu_instancing.attributes_count; ++i)
  				{
  					const cgltf_attribute* attr = node->mesh_gpu_instancing.attributes + i;
  					CGLTF_WRITE_IDXPROP(attr->name, attr->data, context->data->accessors);
  				}
  			}
  			cgltf_write_line(context, "}");
  		}
  		cgltf_write_line(context, "}");
  	}
  
  	if (has_extension)
  		cgltf_write_line(context, "}");
  
  	if (node->weights_count > 0)
  	{
  		cgltf_write_floatarrayprop(context, "weights", node->weights, node->weights_count);
  	}
  
  	if (node->camera)
  	{
  		CGLTF_WRITE_IDXPROP("camera", node->camera, context->data->cameras);
  	}
  
  	cgltf_write_extras(context, &node->extras);
  	cgltf_write_line(context, "}");
  }
  
  static void cgltf_write_scene(cgltf_write_context* context, const cgltf_scene* scene)
  {
  	cgltf_write_line(context, "{");
  	cgltf_write_strprop(context, "name", scene->name);
  	CGLTF_WRITE_IDXARRPROP("nodes", scene->nodes_count, scene->nodes, context->data->nodes);
  	cgltf_write_extras(context, &scene->extras);
  	cgltf_write_line(context, "}");
  }
  
  static void cgltf_write_accessor(cgltf_write_context* context, const cgltf_accessor* accessor)
  {
  	cgltf_write_line(context, "{");
  	cgltf_write_strprop(context, "name", accessor->name);
  	CGLTF_WRITE_IDXPROP("bufferView", accessor->buffer_view, context->data->buffer_views);
  	cgltf_write_intprop(context, "componentType", cgltf_int_from_component_type(accessor->component_type), 0);
  	cgltf_write_strprop(context, "type", cgltf_str_from_type(accessor->type));
  	cgltf_size dim = cgltf_dim_from_type(accessor->type);
  	cgltf_write_boolprop_optional(context, "normalized", (bool)accessor->normalized, false);
  	cgltf_write_sizeprop(context, "byteOffset", (int)accessor->offset, 0);
  	cgltf_write_intprop(context, "count", (int)accessor->count, -1);
  	if (accessor->has_min)
  	{
  		cgltf_write_floatarrayprop(context, "min", accessor->min, dim);
  	}
  	if (accessor->has_max)
  	{
  		cgltf_write_floatarrayprop(context, "max", accessor->max, dim);
  	}
  	if (accessor->is_sparse)
  	{
  		cgltf_write_line(context, "\"sparse\": {");
  		cgltf_write_intprop(context, "count", (int)accessor->sparse.count, 0);
  		cgltf_write_line(context, "\"indices\": {");
  		cgltf_write_sizeprop(context, "byteOffset", (int)accessor->sparse.indices_byte_offset, 0);
  		CGLTF_WRITE_IDXPROP("bufferView", accessor->sparse.indices_buffer_view, context->data->buffer_views);
  		cgltf_write_intprop(context, "componentType", cgltf_int_from_component_type(accessor->sparse.indices_component_type), 0);
  		cgltf_write_extras(context, &accessor->sparse.indices_extras);
  		cgltf_write_line(context, "}");
  		cgltf_write_line(context, "\"values\": {");
  		cgltf_write_sizeprop(context, "byteOffset", (int)accessor->sparse.values_byte_offset, 0);
  		CGLTF_WRITE_IDXPROP("bufferView", accessor->sparse.values_buffer_view, context->data->buffer_views);
  		cgltf_write_extras(context, &accessor->sparse.values_extras);
  		cgltf_write_line(context, "}");
  		cgltf_write_extras(context, &accessor->sparse.extras);
  		cgltf_write_line(context, "}");
  	}
  	cgltf_write_extras(context, &accessor->extras);
  	cgltf_write_line(context, "}");
  }
  
  static void cgltf_write_camera(cgltf_write_context* context, const cgltf_camera* camera)
  {
  	cgltf_write_line(context, "{");
  	cgltf_write_strprop(context, "type", cgltf_str_from_camera_type(camera->type));
  	if (camera->name)
  	{
  		cgltf_write_strprop(context, "name", camera->name);
  	}
  
  	if (camera->type == cgltf_camera_type_orthographic)
  	{
  		cgltf_write_line(context, "\"orthographic\": {");
  		cgltf_write_floatprop(context, "xmag", camera->data.orthographic.xmag, -1.0f);
  		cgltf_write_floatprop(context, "ymag", camera->data.orthographic.ymag, -1.0f);
  		cgltf_write_floatprop(context, "zfar", camera->data.orthographic.zfar, -1.0f);
  		cgltf_write_floatprop(context, "znear", camera->data.orthographic.znear, -1.0f);
  		cgltf_write_extras(context, &camera->data.orthographic.extras);
  		cgltf_write_line(context, "}");
  	}
  	else if (camera->type == cgltf_camera_type_perspective)
  	{
  		cgltf_write_line(context, "\"perspective\": {");
  
  		if (camera->data.perspective.has_aspect_ratio) {
  			cgltf_write_floatprop(context, "aspectRatio", camera->data.perspective.aspect_ratio, -1.0f);
  		}
  
  		cgltf_write_floatprop(context, "yfov", camera->data.perspective.yfov, -1.0f);
  
  		if (camera->data.perspective.has_zfar) {
  			cgltf_write_floatprop(context, "zfar", camera->data.perspective.zfar, -1.0f);
  		}
  
  		cgltf_write_floatprop(context, "znear", camera->data.perspective.znear, -1.0f);
  		cgltf_write_extras(context, &camera->data.perspective.extras);
  		cgltf_write_line(context, "}");
  	}
  	cgltf_write_extras(context, &camera->extras);
  	cgltf_write_line(context, "}");
  }
  
  static void cgltf_write_light(cgltf_write_context* context, const cgltf_light* light)
  {
  	context->extension_flags |= CGLTF_EXTENSION_FLAG_LIGHTS_PUNCTUAL;
  
  	cgltf_write_line(context, "{");
  	cgltf_write_strprop(context, "type", cgltf_str_from_light_type(light->type));
  	if (light->name)
  	{
  		cgltf_write_strprop(context, "name", light->name);
  	}
  	if (cgltf_check_floatarray(light->color, 3, 1.0f))
  	{
  		cgltf_write_floatarrayprop(context, "color", light->color, 3);
  	}
  	cgltf_write_floatprop(context, "intensity", light->intensity, 1.0f);
  	cgltf_write_floatprop(context, "range", light->range, 0.0f);
  
  	if (light->type == cgltf_light_type_spot)
  	{
  		cgltf_write_line(context, "\"spot\": {");
  		cgltf_write_floatprop(context, "innerConeAngle", light->spot_inner_cone_angle, 0.0f);
  		cgltf_write_floatprop(context, "outerConeAngle", light->spot_outer_cone_angle, 3.14159265358979323846f/4.0f);
  		cgltf_write_line(context, "}");
  	}
  	cgltf_write_line(context, "}");
  }
  
  static void cgltf_write_variant(cgltf_write_context* context, const cgltf_material_variant* variant)
  {
  	context->extension_flags |= CGLTF_EXTENSION_FLAG_MATERIALS_VARIANTS;
  
  	cgltf_write_line(context, "{");
  	cgltf_write_strprop(context, "name", variant->name);
  	cgltf_write_extras(context, &variant->extras);
  	cgltf_write_line(context, "}");
  }
  
  cgltf_result cgltf_write_file(const cgltf_options* options, const char* path, const cgltf_data* data)
  {
  	cgltf_size expected = cgltf_write(options, NULL, 0, data);
  	char* buffer = (char*) malloc(expected);
  	cgltf_size actual = cgltf_write(options, buffer, expected, data);
  	if (expected != actual) {
  		fprintf(stderr, "Error: expected %zu bytes but wrote %zu bytes.\n", expected, actual);
  	}
  	FILE* file = fopen(path, "wt");
  	if (!file)
  	{
  		return cgltf_result_file_not_found;
  	}
  	// Note that cgltf_write() includes a null terminator, which we omit from the file content.
  	fwrite(buffer, actual - 1, 1, file);
  	fclose(file);
  	free(buffer);
  	return cgltf_result_success;
  }
  
  static void cgltf_write_extensions(cgltf_write_context* context, uint32_t extension_flags)
  {
  	if (extension_flags & CGLTF_EXTENSION_FLAG_TEXTURE_TRANSFORM) {
  		cgltf_write_stritem(context, "KHR_texture_transform");
  	}
  	if (extension_flags & CGLTF_EXTENSION_FLAG_MATERIALS_UNLIT) {
  		cgltf_write_stritem(context, "KHR_materials_unlit");
  	}
  	if (extension_flags & CGLTF_EXTENSION_FLAG_SPECULAR_GLOSSINESS) {
  		cgltf_write_stritem(context, "KHR_materials_pbrSpecularGlossiness");
  	}
  	if (extension_flags & CGLTF_EXTENSION_FLAG_LIGHTS_PUNCTUAL) {
  		cgltf_write_stritem(context, "KHR_lights_punctual");
  	}
  	if (extension_flags & CGLTF_EXTENSION_FLAG_DRACO_MESH_COMPRESSION) {
  		cgltf_write_stritem(context, "KHR_draco_mesh_compression");
  	}
  	if (extension_flags & CGLTF_EXTENSION_FLAG_MATERIALS_CLEARCOAT) {
  		cgltf_write_stritem(context, "KHR_materials_clearcoat");
  	}
  	if (extension_flags & CGLTF_EXTENSION_FLAG_MATERIALS_IOR) {
  		cgltf_write_stritem(context, "KHR_materials_ior");
  	}
  	if (extension_flags & CGLTF_EXTENSION_FLAG_MATERIALS_SPECULAR) {
  		cgltf_write_stritem(context, "KHR_materials_specular");
  	}
  	if (extension_flags & CGLTF_EXTENSION_FLAG_MATERIALS_TRANSMISSION) {
  		cgltf_write_stritem(context, "KHR_materials_transmission");
  	}
  	if (extension_flags & CGLTF_EXTENSION_FLAG_MATERIALS_SHEEN) {
  		cgltf_write_stritem(context, "KHR_materials_sheen");
  	}
  	if (extension_flags & CGLTF_EXTENSION_FLAG_MATERIALS_VARIANTS) {
  		cgltf_write_stritem(context, "KHR_materials_variants");
  	}
  	if (extension_flags & CGLTF_EXTENSION_FLAG_MATERIALS_VOLUME) {
  		cgltf_write_stritem(context, "KHR_materials_volume");
  	}
  	if (extension_flags & CGLTF_EXTENSION_FLAG_TEXTURE_BASISU) {
  		cgltf_write_stritem(context, "KHR_texture_basisu");
  	}
  	if (extension_flags & CGLTF_EXTENSION_FLAG_MATERIALS_EMISSIVE_STRENGTH) {
  		cgltf_write_stritem(context, "KHR_materials_emissive_strength");
  	}
  	if (extension_flags & CGLTF_EXTENSION_FLAG_MATERIALS_IRIDESCENCE) {
  		cgltf_write_stritem(context, "KHR_materials_iridescence");
  	}
  	if (extension_flags & CGLTF_EXTENSION_FLAG_MESH_GPU_INSTANCING) {
  		cgltf_write_stritem(context, "EXT_mesh_gpu_instancing");
  	}
  }
  
  cgltf_size cgltf_write(const cgltf_options* options, char* buffer, cgltf_size size, const cgltf_data* data)
  {
  	(void)options;
  	cgltf_write_context ctx;
  	ctx.buffer = buffer;
  	ctx.buffer_size = size;
  	ctx.remaining = size;
  	ctx.cursor = buffer;
  	ctx.chars_written = 0;
  	ctx.data = data;
  	ctx.depth = 1;
  	ctx.indent = "  ";
  	ctx.needs_comma = 0;
  	ctx.extension_flags = 0;
  	ctx.required_extension_flags = 0;
  
  	cgltf_write_context* context = &ctx;
  
  	CGLTF_SPRINTF("{");
  
  	if (data->accessors_count > 0)
  	{
  		cgltf_write_line(context, "\"accessors\": [");
  		for (cgltf_size i = 0; i < data->accessors_count; ++i)
  		{
  			cgltf_write_accessor(context, data->accessors + i);
  		}
  		cgltf_write_line(context, "]");
  	}
  
  	cgltf_write_asset(context, &data->asset);
  
  	if (data->buffer_views_count > 0)
  	{
  		cgltf_write_line(context, "\"bufferViews\": [");
  		for (cgltf_size i = 0; i < data->buffer_views_count; ++i)
  		{
  			cgltf_write_buffer_view(context, data->buffer_views + i);
  		}
  		cgltf_write_line(context, "]");
  	}
  
  	if (data->buffers_count > 0)
  	{
  		cgltf_write_line(context, "\"buffers\": [");
  		for (cgltf_size i = 0; i < data->buffers_count; ++i)
  		{
  			cgltf_write_buffer(context, data->buffers + i);
  		}
  		cgltf_write_line(context, "]");
  	}
  
  	if (data->images_count > 0)
  	{
  		cgltf_write_line(context, "\"images\": [");
  		for (cgltf_size i = 0; i < data->images_count; ++i)
  		{
  			cgltf_write_image(context, data->images + i);
  		}
  		cgltf_write_line(context, "]");
  	}
  
  	if (data->meshes_count > 0)
  	{
  		cgltf_write_line(context, "\"meshes\": [");
  		for (cgltf_size i = 0; i < data->meshes_count; ++i)
  		{
  			cgltf_write_mesh(context, data->meshes + i);
  		}
  		cgltf_write_line(context, "]");
  	}
  
  	if (data->materials_count > 0)
  	{
  		cgltf_write_line(context, "\"materials\": [");
  		for (cgltf_size i = 0; i < data->materials_count; ++i)
  		{
  			cgltf_write_material(context, data->materials + i);
  		}
  		cgltf_write_line(context, "]");
  	}
  
  	if (data->nodes_count > 0)
  	{
  		cgltf_write_line(context, "\"nodes\": [");
  		for (cgltf_size i = 0; i < data->nodes_count; ++i)
  		{
  			cgltf_write_node(context, data->nodes + i);
  		}
  		cgltf_write_line(context, "]");
  	}
  
  	if (data->samplers_count > 0)
  	{
  		cgltf_write_line(context, "\"samplers\": [");
  		for (cgltf_size i = 0; i < data->samplers_count; ++i)
  		{
  			cgltf_write_sampler(context, data->samplers + i);
  		}
  		cgltf_write_line(context, "]");
  	}
  
  	CGLTF_WRITE_IDXPROP("scene", data->scene, data->scenes);
  
  	if (data->scenes_count > 0)
  	{
  		cgltf_write_line(context, "\"scenes\": [");
  		for (cgltf_size i = 0; i < data->scenes_count; ++i)
  		{
  			cgltf_write_scene(context, data->scenes + i);
  		}
  		cgltf_write_line(context, "]");
  	}
  
  	if (data->textures_count > 0)
  	{
  		cgltf_write_line(context, "\"textures\": [");
  		for (cgltf_size i = 0; i < data->textures_count; ++i)
  		{
  			cgltf_write_texture(context, data->textures + i);
  		}
  		cgltf_write_line(context, "]");
  	}
  
  	if (data->skins_count > 0)
  	{
  		cgltf_write_line(context, "\"skins\": [");
  		for (cgltf_size i = 0; i < data->skins_count; ++i)
  		{
  			cgltf_write_skin(context, data->skins + i);
  		}
  		cgltf_write_line(context, "]");
  	}
  
  	if (data->animations_count > 0)
  	{
  		cgltf_write_line(context, "\"animations\": [");
  		for (cgltf_size i = 0; i < data->animations_count; ++i)
  		{
  			cgltf_write_animation(context, data->animations + i);
  		}
  		cgltf_write_line(context, "]");
  	}
  
  	if (data->cameras_count > 0)
  	{
  		cgltf_write_line(context, "\"cameras\": [");
  		for (cgltf_size i = 0; i < data->cameras_count; ++i)
  		{
  			cgltf_write_camera(context, data->cameras + i);
  		}
  		cgltf_write_line(context, "]");
  	}
  
  	if (data->lights_count > 0 || data->variants_count > 0)
  	{
  		cgltf_write_line(context, "\"extensions\": {");
  
  		if (data->lights_count > 0)
  		{
  			cgltf_write_line(context, "\"KHR_lights_punctual\": {");
  			cgltf_write_line(context, "\"lights\": [");
  			for (cgltf_size i = 0; i < data->lights_count; ++i)
  			{
  				cgltf_write_light(context, data->lights + i);
  			}
  			cgltf_write_line(context, "]");
  			cgltf_write_line(context, "}");
  		}
  
  		if (data->variants_count)
  		{
  			cgltf_write_line(context, "\"KHR_materials_variants\": {");
  			cgltf_write_line(context, "\"variants\": [");
  			for (cgltf_size i = 0; i < data->variants_count; ++i)
  			{
  				cgltf_write_variant(context, data->variants + i);
  			}
  			cgltf_write_line(context, "]");
  			cgltf_write_line(context, "}");
  		}
  
  		cgltf_write_line(context, "}");
  	}
  
  	if (context->extension_flags != 0)
  	{
  		cgltf_write_line(context, "\"extensionsUsed\": [");
  		cgltf_write_extensions(context, context->extension_flags);
  		cgltf_write_line(context, "]");
  	}
  
  	if (context->required_extension_flags != 0)
  	{
  		cgltf_write_line(context, "\"extensionsRequired\": [");
  		cgltf_write_extensions(context, context->required_extension_flags);
  		cgltf_write_line(context, "]");
  	}
  
  	cgltf_write_extras(context, &data->extras);
  
  	CGLTF_SPRINTF("\n}\n");
  
  	// snprintf does not include the null terminator in its return value, so be sure to include it
  	// in the returned byte count.
  	return 1 + ctx.chars_written;
  }
  
  #endif /* #ifdef CGLTF_WRITE_IMPLEMENTATION */
  
  /* cgltf is distributed under MIT license:
   *
   * Copyright (c) 2019-2021 Philip Rideout
  
   * 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.
   */
  