text: /*************************************************************************/
  /*  spatial_editor_plugin.h                                              */
  /*************************************************************************/
  /*                       This file is part of:                           */
  /*                           GODOT ENGINE                                */
  /*                      https://godotengine.org                          */
  /*************************************************************************/
  /* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur.                 */
  /* Copyright (c) 2014-2020 Godot Engine contributors (cf. AUTHORS.md).   */
  /*                                                                       */
  /* 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   */
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  /* 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.                */
  /*************************************************************************/
  
  #ifndef SPATIAL_EDITOR_PLUGIN_H
  #define SPATIAL_EDITOR_PLUGIN_H
  
  #include "editor/editor_node.h"
  #include "editor/editor_plugin.h"
  #include "scene/3d/immediate_geometry.h"
  #include "scene/3d/light.h"
  #include "scene/3d/visual_instance.h"
  #include "scene/gui/panel_container.h"
  
  class Camera;
  class SpatialEditor;
  class EditorSpatialGizmoPlugin;
  class ViewportContainer;
  
  class EditorSpatialGizmo : public SpatialGizmo {
  
  	GDCLASS(EditorSpatialGizmo, SpatialGizmo);
  
  	bool selected;
  	bool instanced;
  
  public:
  	void set_selected(bool p_selected) { selected = p_selected; }
  	bool is_selected() const { return selected; }
  
  	struct Instance {
  
  		RID instance;
  		Ref<ArrayMesh> mesh;
  		Ref<Material> material;
  		Ref<SkinReference> skin_reference;
  		RID skeleton;
  		bool billboard;
  		bool unscaled;
  		bool can_intersect;
  		bool extra_margin;
  		Instance() {
  
  			billboard = false;
  			unscaled = false;
  			can_intersect = false;
  			extra_margin = false;
  		}
  
  		void create_instance(Spatial *p_base, bool p_hidden = false);
  	};
  
  	Vector<Vector3> collision_segments;
  	Ref<TriangleMesh> collision_mesh;
  
  	struct Handle {
  		Vector3 pos;
  		bool billboard;
  	};
  
  	Vector<Vector3> handles;
  	Vector<Vector3> secondary_handles;
  	float selectable_icon_size;
  	bool billboard_handle;
  
  	bool valid;
  	bool hidden;
  	Spatial *base;
  	Vector<Instance> instances;
  	Spatial *spatial_node;
  	EditorSpatialGizmoPlugin *gizmo_plugin;
  
  	void _set_spatial_node(Node *p_node) { set_spatial_node(Object::cast_to<Spatial>(p_node)); }
  
  protected:
  	static void _bind_methods();
  
  public:
  	void add_lines(const Vector<Vector3> &p_lines, const Ref<Material> &p_material, bool p_billboard = false, const Color &p_modulate = Color(1, 1, 1));
  	void add_mesh(const Ref<ArrayMesh> &p_mesh, bool p_billboard = false, const Ref<SkinReference> &p_skin_reference = Ref<SkinReference>(), const Ref<Material> &p_material = Ref<Material>());
  	void add_collision_segments(const Vector<Vector3> &p_lines);
  	void add_collision_triangles(const Ref<TriangleMesh> &p_tmesh);
  	void add_unscaled_billboard(const Ref<Material> &p_material, float p_scale = 1, const Color &p_modulate = Color(1, 1, 1));
  	void add_handles(const Vector<Vector3> &p_handles, const Ref<Material> &p_material, bool p_billboard = false, bool p_secondary = false);
  	void add_solid_box(Ref<Material> &p_material, Vector3 p_size, Vector3 p_position = Vector3());
  
  	virtual bool is_handle_highlighted(int p_idx) const;
  	virtual String get_handle_name(int p_idx) const;
  	virtual Variant get_handle_value(int p_idx);
  	virtual void set_handle(int p_idx, Camera *p_camera, const Point2 &p_point);
  	virtual void commit_handle(int p_idx, const Variant &p_restore, bool p_cancel = false);
  
  	void set_spatial_node(Spatial *p_node);
  	Spatial *get_spatial_node() const { return spatial_node; }
  	Ref<EditorSpatialGizmoPlugin> get_plugin() const { return gizmo_plugin; }
  	Vector3 get_handle_pos(int p_idx) const;
  	bool intersect_frustum(const Camera *p_camera, const Vector<Plane> &p_frustum);
  	bool intersect_ray(Camera *p_camera, const Point2 &p_point, Vector3 &r_pos, Vector3 &r_normal, int *r_gizmo_handle = NULL, bool p_sec_first = false);
  
  	virtual void clear();
  	virtual void create();
  	virtual void transform();
  	virtual void redraw();
  	virtual void free();
  
  	virtual bool is_editable() const;
  
  	void set_hidden(bool p_hidden);
  	void set_plugin(EditorSpatialGizmoPlugin *p_plugin);
  
  	EditorSpatialGizmo();
  	~EditorSpatialGizmo();
  };
  
  class SpatialEditorViewport : public Control {
  
  	GDCLASS(SpatialEditorViewport, Control);
  	friend class SpatialEditor;
  	enum {
  
  		VIEW_TOP,
  		VIEW_BOTTOM,
  		VIEW_LEFT,
  		VIEW_RIGHT,
  		VIEW_FRONT,
  		VIEW_REAR,
  		VIEW_CENTER_TO_ORIGIN,
  		VIEW_CENTER_TO_SELECTION,
  		VIEW_ALIGN_TRANSFORM_WITH_VIEW,
  		VIEW_ALIGN_ROTATION_WITH_VIEW,
  		VIEW_PERSPECTIVE,
  		VIEW_ENVIRONMENT,
  		VIEW_ORTHOGONAL,
  		VIEW_HALF_RESOLUTION,
  		VIEW_AUDIO_LISTENER,
  		VIEW_AUDIO_DOPPLER,
  		VIEW_GIZMOS,
  		VIEW_INFORMATION,
  		VIEW_FPS,
  		VIEW_DISPLAY_NORMAL,
  		VIEW_DISPLAY_WIREFRAME,
  		VIEW_DISPLAY_OVERDRAW,
  		VIEW_DISPLAY_SHADELESS,
  		VIEW_LOCK_ROTATION,
  		VIEW_CINEMATIC_PREVIEW
  	};
  
  public:
  	enum {
  		GIZMO_BASE_LAYER = 27,
  		GIZMO_EDIT_LAYER = 26,
  		GIZMO_GRID_LAYER = 25
  	};
  
  	enum NavigationScheme {
  		NAVIGATION_GODOT,
  		NAVIGATION_MAYA,
  		NAVIGATION_MODO,
  	};
  
  private:
  	int index;
  	String name;
  	void _menu_option(int p_option);
  	Spatial *preview_node;
  	AABB *preview_bounds;
  	Vector<String> selected_files;
  	AcceptDialog *accept;
  
  	Node *target_node;
  	Point2 drop_pos;
  
  	EditorNode *editor;
  	EditorData *editor_data;
  	EditorSelection *editor_selection;
  	UndoRedo *undo_redo;
  
  	CheckBox *preview_camera;
  	ViewportContainer *viewport_container;
  
  	MenuButton *view_menu;
  
  	Control *surface;
  	Viewport *viewport;
  	Camera *camera;
  	bool transforming;
  	bool orthogonal;
  	bool lock_rotation;
  	float gizmo_scale;
  
  	bool freelook_active;
  	real_t freelook_speed;
  
  	Label *info_label;
  	Label *fps_label;
  	Label *cinema_label;
  	Label *locked_label;
  
  	struct _RayResult {
  
  		Spatial *item;
  		float depth;
  		int handle;
  		_FORCE_INLINE_ bool operator<(const _RayResult &p_rr) const { return depth < p_rr.depth; }
  	};
  
  	void _update_name();
  	void _compute_edit(const Point2 &p_point);
  	void _clear_selected();
  	void _select_clicked(bool p_append, bool p_single);
  	void _select(Node *p_node, bool p_append, bool p_single);
  	ObjectID _select_ray(const Point2 &p_pos, bool p_append, bool &r_includes_current, int *r_gizmo_handle = NULL, bool p_alt_select = false);
  	void _find_items_at_pos(const Point2 &p_pos, bool &r_includes_current, Vector<_RayResult> &results, bool p_alt_select = false);
  	Vector3 _get_ray_pos(const Vector2 &p_pos) const;
  	Vector3 _get_ray(const Vector2 &p_pos) const;
  	Point2 _point_to_screen(const Vector3 &p_point);
  	Transform _get_camera_transform() const;
  	int get_selected_count() const;
  
  	Vector3 _get_camera_position() const;
  	Vector3 _get_camera_normal() const;
  	Vector3 _get_screen_to_space(const Vector3 &p_vector3);
  
  	void _select_region();
  	bool _gizmo_select(const Vector2 &p_screenpos, bool p_highlight_only = false);
  
  	void _nav_pan(Ref<InputEventWithModifiers> p_event, const Vector2 &p_relative);
  	void _nav_zoom(Ref<InputEventWithModifiers> p_event, const Vector2 &p_relative);
  	void _nav_orbit(Ref<InputEventWithModifiers> p_event, const Vector2 &p_relative);
  	void _nav_look(Ref<InputEventWithModifiers> p_event, const Vector2 &p_relative);
  
  	float get_znear() const;
  	float get_zfar() const;
  	float get_fov() const;
  
  	ObjectID clicked;
  	Vector<_RayResult> selection_results;
  	bool clicked_includes_current;
  	bool clicked_wants_append;
  
  	PopupMenu *selection_menu;
  
  	enum NavigationZoomStyle {
  		NAVIGATION_ZOOM_VERTICAL,
  		NAVIGATION_ZOOM_HORIZONTAL
  	};
  
  	enum NavigationMode {
  		NAVIGATION_NONE,
  		NAVIGATION_PAN,
  		NAVIGATION_ZOOM,
  		NAVIGATION_ORBIT,
  		NAVIGATION_LOOK
  	};
  	enum TransformMode {
  		TRANSFORM_NONE,
  		TRANSFORM_ROTATE,
  		TRANSFORM_TRANSLATE,
  		TRANSFORM_SCALE
  
  	};
  	enum TransformPlane {
  		TRANSFORM_VIEW,
  		TRANSFORM_X_AXIS,
  		TRANSFORM_Y_AXIS,
  		TRANSFORM_Z_AXIS,
  		TRANSFORM_YZ,
  		TRANSFORM_XZ,
  		TRANSFORM_XY,
  	};
  
  	struct EditData {
  		TransformMode mode;
  		TransformPlane plane;
  		Transform original;
  		Vector3 click_ray;
  		Vector3 click_ray_pos;
  		Vector3 center;
  		Vector3 orig_gizmo_pos;
  		int edited_gizmo;
  		Point2 mouse_pos;
  		bool snap;
  		Ref<EditorSpatialGizmo> gizmo;
  		int gizmo_handle;
  		Variant gizmo_initial_value;
  		Vector3 gizmo_initial_pos;
  	} _edit;
  
  	struct Cursor {
  
  		Vector3 pos;
  		float x_rot, y_rot, distance;
  		Vector3 eye_pos; // Used in freelook mode
  		bool region_select;
  		Point2 region_begin, region_end;
  
  		Cursor() {
  			x_rot = y_rot = 0.5;
  			distance = 4;
  			region_select = false;
  		}
  	};
  	// Viewport camera supports movement smoothing,
  	// so one cursor is the real cursor, while the other can be an interpolated version.
  	Cursor cursor; // Immediate cursor
  	Cursor camera_cursor; // That one may be interpolated (don't modify this one except for smoothing purposes)
  
  	void scale_cursor_distance(real_t scale);
  
  	void set_freelook_active(bool active_now);
  	void scale_freelook_speed(real_t scale);
  
  	real_t zoom_indicator_delay;
  
  	RID move_gizmo_instance[3], move_plane_gizmo_instance[3], rotate_gizmo_instance[3], scale_gizmo_instance[3], scale_plane_gizmo_instance[3];
  
  	String last_message;
  	String message;
  	float message_time;
  
  	void set_message(String p_message, float p_time = 5);
  
  	//
  	void _update_camera(float p_interp_delta);
  	Transform to_camera_transform(const Cursor &p_cursor) const;
  	void _draw();
  
  	void _surface_mouse_enter();
  	void _surface_mouse_exit();
  	void _surface_focus_enter();
  	void _surface_focus_exit();
  
  	void _sinput(const Ref<InputEvent> &p_event);
  	void _update_freelook(real_t delta);
  	SpatialEditor *spatial_editor;
  
  	Camera *previewing;
  	Camera *preview;
  
  	bool previewing_cinema;
  	bool _is_node_locked(const Node *p_node);
  	void _preview_exited_scene();
  	void _toggle_camera_preview(bool);
  	void _toggle_cinema_preview(bool);
  	void _init_gizmo_instance(int p_idx);
  	void _finish_gizmo_instances();
  	void _selection_result_pressed(int);
  	void _selection_menu_hide();
  	void _list_select(Ref<InputEventMouseButton> b);
  	Point2i _get_warped_mouse_motion(const Ref<InputEventMouseMotion> &p_ev_mouse_motion) const;
  
  	Vector3 _get_instance_position(const Point2 &p_pos) const;
  	static AABB _calculate_spatial_bounds(const Spatial *p_parent, bool p_exclude_toplevel_transform = true);
  	void _create_preview(const Vector<String> &files) const;
  	void _remove_preview();
  	bool _cyclical_dependency_exists(const String &p_target_scene_path, Node *p_desired_node);
  	bool _create_instance(Node *parent, String &path, const Point2 &p_point);
  	void _perform_drop_data();
  
  	bool can_drop_data_fw(const Point2 &p_point, const Variant &p_data, Control *p_from) const;
  	void drop_data_fw(const Point2 &p_point, const Variant &p_data, Control *p_from);
  
  protected:
  	void _notification(int p_what);
  	static void _bind_methods();
  
  public:
  	void update_surface() { surface->update(); }
  	void update_transform_gizmo_view();
  
  	void set_can_preview(Camera *p_preview);
  	void set_state(const Dictionary &p_state);
  	Dictionary get_state() const;
  	void reset();
  	bool is_freelook_active() const { return freelook_active; }
  
  	void focus_selection();
  
  	void assign_pending_data_pointers(
  			Spatial *p_preview_node,
  			AABB *p_preview_bounds,
  			AcceptDialog *p_accept);
  
  	Viewport *get_viewport_node() { return viewport; }
  	Camera *get_camera() { return camera; } // return the default camera object.
  
  	SpatialEditorViewport(SpatialEditor *p_spatial_editor, EditorNode *p_editor, int p_index);
  };
  
  class SpatialEditorSelectedItem : public Object {
  
  	GDCLASS(SpatialEditorSelectedItem, Object);
  
  public:
  	AABB aabb;
  	Transform original; // original location when moving
  	Transform original_local;
  	Transform last_xform; // last transform
  	Spatial *sp;
  	RID sbox_instance;
  
  	SpatialEditorSelectedItem() { sp = NULL; }
  	~SpatialEditorSelectedItem();
  };
  
  class SpatialEditorViewportContainer : public Container {
  
  	GDCLASS(SpatialEditorViewportContainer, Container);
  
  public:
  	enum View {
  		VIEW_USE_1_VIEWPORT,
  		VIEW_USE_2_VIEWPORTS,
  		VIEW_USE_2_VIEWPORTS_ALT,
  		VIEW_USE_3_VIEWPORTS,
  		VIEW_USE_3_VIEWPORTS_ALT,
  		VIEW_USE_4_VIEWPORTS,
  	};
  
  private:
  	View view;
  	bool mouseover;
  	float ratio_h;
  	float ratio_v;
  
  	bool hovering_v;
  	bool hovering_h;
  
  	bool dragging_v;
  	bool dragging_h;
  	Vector2 drag_begin_pos;
  	Vector2 drag_begin_ratio;
  
  	void _gui_input(const Ref<InputEvent> &p_event);
  
  protected:
  	void _notification(int p_what);
  	static void _bind_methods();
  
  public:
  	void set_view(View p_view);
  	View get_view();
  
  	SpatialEditorViewportContainer();
  };
  
  class SpatialEditor : public VBoxContainer {
  
  	GDCLASS(SpatialEditor, VBoxContainer);
  
  public:
  	static const unsigned int VIEWPORTS_COUNT = 4;
  
  	enum ToolMode {
  
  		TOOL_MODE_SELECT,
  		TOOL_MODE_MOVE,
  		TOOL_MODE_ROTATE,
  		TOOL_MODE_SCALE,
  		TOOL_MODE_LIST_SELECT,
  		TOOL_LOCK_SELECTED,
  		TOOL_UNLOCK_SELECTED,
  		TOOL_GROUP_SELECTED,
  		TOOL_UNGROUP_SELECTED,
  		TOOL_MAX
  	};
  
  	enum ToolOptions {
  
  		TOOL_OPT_LOCAL_COORDS,
  		TOOL_OPT_USE_SNAP,
  		TOOL_OPT_OVERRIDE_CAMERA,
  		TOOL_OPT_MAX
  
  	};
  
  private:
  	EditorNode *editor;
  	EditorSelection *editor_selection;
  
  	SpatialEditorViewportContainer *viewport_base;
  	SpatialEditorViewport *viewports[VIEWPORTS_COUNT];
  	VSplitContainer *shader_split;
  	HSplitContainer *palette_split;
  
  	/////
  
  	ToolMode tool_mode;
  	bool orthogonal;
  
  	VisualServer::ScenarioDebugMode scenario_debug;
  
  	RID origin;
  	RID origin_instance;
  	bool origin_enabled;
  	RID grid[3];
  	RID grid_instance[3];
  	bool grid_visible[3]; //currently visible
  	bool grid_enable[3]; //should be always visible if true
  	bool grid_enabled;
  
  	Ref<ArrayMesh> move_gizmo[3], move_plane_gizmo[3], rotate_gizmo[3], scale_gizmo[3], scale_plane_gizmo[3];
  	Ref<SpatialMaterial> gizmo_color[3];
  	Ref<SpatialMaterial> plane_gizmo_color[3];
  	Ref<SpatialMaterial> gizmo_color_hl[3];
  	Ref<SpatialMaterial> plane_gizmo_color_hl[3];
  
  	int over_gizmo_handle;
  
  	Ref<ArrayMesh> selection_box;
  	RID indicators;
  	RID indicators_instance;
  	RID cursor_mesh;
  	RID cursor_instance;
  	Ref<SpatialMaterial> indicator_mat;
  	Ref<SpatialMaterial> cursor_material;
  
  	// Scene drag and drop support
  	Spatial *preview_node;
  	AABB preview_bounds;
  
  	struct Gizmo {
  
  		bool visible;
  		float scale;
  		Transform transform;
  	} gizmo;
  
  	enum MenuOption {
  
  		MENU_TOOL_SELECT,
  		MENU_TOOL_MOVE,
  		MENU_TOOL_ROTATE,
  		MENU_TOOL_SCALE,
  		MENU_TOOL_LIST_SELECT,
  		MENU_TOOL_LOCAL_COORDS,
  		MENU_TOOL_USE_SNAP,
  		MENU_TOOL_OVERRIDE_CAMERA,
  		MENU_TRANSFORM_CONFIGURE_SNAP,
  		MENU_TRANSFORM_DIALOG,
  		MENU_VIEW_USE_1_VIEWPORT,
  		MENU_VIEW_USE_2_VIEWPORTS,
  		MENU_VIEW_USE_2_VIEWPORTS_ALT,
  		MENU_VIEW_USE_3_VIEWPORTS,
  		MENU_VIEW_USE_3_VIEWPORTS_ALT,
  		MENU_VIEW_USE_4_VIEWPORTS,
  		MENU_VIEW_ORIGIN,
  		MENU_VIEW_GRID,
  		MENU_VIEW_GIZMOS_3D_ICONS,
  		MENU_VIEW_CAMERA_SETTINGS,
  		MENU_LOCK_SELECTED,
  		MENU_UNLOCK_SELECTED,
  		MENU_GROUP_SELECTED,
  		MENU_UNGROUP_SELECTED,
  		MENU_SNAP_TO_FLOOR
  	};
  
  	Button *tool_button[TOOL_MAX];
  	Button *tool_option_button[TOOL_OPT_MAX];
  
  	MenuButton *transform_menu;
  	PopupMenu *gizmos_menu;
  	MenuButton *view_menu;
  
  	AcceptDialog *accept;
  
  	ConfirmationDialog *snap_dialog;
  	ConfirmationDialog *xform_dialog;
  	ConfirmationDialog *settings_dialog;
  
  	bool snap_enabled;
  	bool snap_key_enabled;
  	LineEdit *snap_translate;
  	LineEdit *snap_rotate;
  	LineEdit *snap_scale;
  	PanelContainer *menu_panel;
  
  	LineEdit *xform_translate[3];
  	LineEdit *xform_rotate[3];
  	LineEdit *xform_scale[3];
  	OptionButton *xform_type;
  
  	VBoxContainer *settings_vbc;
  	SpinBox *settings_fov;
  	SpinBox *settings_znear;
  	SpinBox *settings_zfar;
  
  	void _xform_dialog_action();
  	void _menu_item_pressed(int p_option);
  	void _menu_item_toggled(bool pressed, int p_option);
  	void _menu_gizmo_toggled(int p_option);
  	void _update_camera_override_button(bool p_game_running);
  	void _update_camera_override_viewport(Object *p_viewport);
  
  	HBoxContainer *hbc_menu;
  
  	void _generate_selection_box();
  	UndoRedo *undo_redo;
  
  	int camera_override_viewport_id;
  
  	void _init_indicators();
  	void _update_gizmos_menu();
  	void _update_gizmos_menu_theme();
  	void _init_grid();
  	void _finish_indicators();
  	void _finish_grid();
  
  	void _toggle_maximize_view(Object *p_viewport);
  
  	Node *custom_camera;
  
  	Object *_get_editor_data(Object *p_what);
  
  	Ref<Environment> viewport_environment;
  
  	Spatial *selected;
  
  	void _request_gizmo(Object *p_obj);
  
  	static SpatialEditor *singleton;
  
  	void _node_removed(Node *p_node);
  	Vector<Ref<EditorSpatialGizmoPlugin> > gizmo_plugins_by_priority;
  	Vector<Ref<EditorSpatialGizmoPlugin> > gizmo_plugins_by_name;
  
  	void _register_all_gizmos();
  
  	SpatialEditor();
  
  	bool is_any_freelook_active() const;
  
  	void _refresh_menu_icons();
  
  protected:
  	void _notification(int p_what);
  	//void _gui_input(InputEvent p_event);
  	void _unhandled_key_input(Ref<InputEvent> p_event);
  
  	static void _bind_methods();
  
  public:
  	static SpatialEditor *get_singleton() { return singleton; }
  	void snap_cursor_to_plane(const Plane &p_plane);
  
  	Vector3 snap_point(Vector3 p_target, Vector3 p_start = Vector3(0, 0, 0)) const;
  
  	float get_znear() const { return settings_znear->get_value(); }
  	float get_zfar() const { return settings_zfar->get_value(); }
  	float get_fov() const { return settings_fov->get_value(); }
  
  	Transform get_gizmo_transform() const { return gizmo.transform; }
  	bool is_gizmo_visible() const { return gizmo.visible; }
  
  	ToolMode get_tool_mode() const { return tool_mode; }
  	bool are_local_coords_enabled() const { return tool_option_button[SpatialEditor::TOOL_OPT_LOCAL_COORDS]->is_pressed(); }
  	bool is_snap_enabled() const { return snap_enabled ^ snap_key_enabled; }
  	float get_translate_snap() const;
  	float get_rotate_snap() const;
  	float get_scale_snap() const;
  
  	Ref<ArrayMesh> get_move_gizmo(int idx) const { return move_gizmo[idx]; }
  	Ref<ArrayMesh> get_move_plane_gizmo(int idx) const { return move_plane_gizmo[idx]; }
  	Ref<ArrayMesh> get_rotate_gizmo(int idx) const { return rotate_gizmo[idx]; }
  	Ref<ArrayMesh> get_scale_gizmo(int idx) const { return scale_gizmo[idx]; }
  	Ref<ArrayMesh> get_scale_plane_gizmo(int idx) const { return scale_plane_gizmo[idx]; }
  
  	void update_transform_gizmo();
  	void update_all_gizmos(Node *p_node = NULL);
  	void snap_selected_nodes_to_floor();
  	void select_gizmo_highlight_axis(int p_axis);
  	void set_custom_camera(Node *p_camera) { custom_camera = p_camera; }
  
  	void set_undo_redo(UndoRedo *p_undo_redo) { undo_redo = p_undo_redo; }
  	Dictionary get_state() const;
  	void set_state(const Dictionary &p_state);
  
  	Ref<Environment> get_viewport_environment() { return viewport_environment; }
  
  	UndoRedo *get_undo_redo() { return undo_redo; }
  
  	void add_control_to_menu_panel(Control *p_control);
  	void remove_control_from_menu_panel(Control *p_control);
  
  	VSplitContainer *get_shader_split();
  	HSplitContainer *get_palette_split();
  
  	Spatial *get_selected() { return selected; }
  
  	int get_over_gizmo_handle() const { return over_gizmo_handle; }
  	void set_over_gizmo_handle(int idx) { over_gizmo_handle = idx; }
  
  	void set_can_preview(Camera *p_preview);
  
  	SpatialEditorViewport *get_editor_viewport(int p_idx) {
  		ERR_FAIL_INDEX_V(p_idx, static_cast<int>(VIEWPORTS_COUNT), NULL);
  		return viewports[p_idx];
  	}
  
  	void add_gizmo_plugin(Ref<EditorSpatialGizmoPlugin> p_plugin);
  	void remove_gizmo_plugin(Ref<EditorSpatialGizmoPlugin> p_plugin);
  
  	void edit(Spatial *p_spatial);
  	void clear();
  
  	SpatialEditor(EditorNode *p_editor);
  	~SpatialEditor();
  };
  
  class SpatialEditorPlugin : public EditorPlugin {
  
  	GDCLASS(SpatialEditorPlugin, EditorPlugin);
  
  	SpatialEditor *spatial_editor;
  	EditorNode *editor;
  
  protected:
  	static void _bind_methods();
  
  public:
  	void snap_cursor_to_plane(const Plane &p_plane);
  
  	SpatialEditor *get_spatial_editor() { return spatial_editor; }
  	virtual String get_name() const { return "3D"; }
  	bool has_main_screen() const { return true; }
  	virtual void make_visible(bool p_visible);
  	virtual void edit(Object *p_object);
  	virtual bool handles(Object *p_object) const;
  
  	virtual Dictionary get_state() const;
  	virtual void set_state(const Dictionary &p_state);
  	virtual void clear() { spatial_editor->clear(); }
  
  	virtual void edited_scene_changed();
  
  	SpatialEditorPlugin(EditorNode *p_node);
  	~SpatialEditorPlugin();
  };
  
  class EditorSpatialGizmoPlugin : public Resource {
  
  	GDCLASS(EditorSpatialGizmoPlugin, Resource);
  
  public:
  	static const int VISIBLE = 0;
  	static const int HIDDEN = 1;
  	static const int ON_TOP = 2;
  
  private:
  	int current_state;
  	List<EditorSpatialGizmo *> current_gizmos;
  	HashMap<String, Vector<Ref<SpatialMaterial> > > materials;
  
  protected:
  	static void _bind_methods();
  	virtual bool has_gizmo(Spatial *p_spatial);
  	virtual Ref<EditorSpatialGizmo> create_gizmo(Spatial *p_spatial);
  
  public:
  	void create_material(const String &p_name, const Color &p_color, bool p_billboard = false, bool p_on_top = false, bool p_use_vertex_color = false);
  	void create_icon_material(const String &p_name, const Ref<Texture> &p_texture, bool p_on_top = false, const Color &p_albedo = Color(1, 1, 1, 1));
  	void create_handle_material(const String &p_name, bool p_billboard = false);
  	void add_material(const String &p_name, Ref<SpatialMaterial> p_material);
  
  	Ref<SpatialMaterial> get_material(const String &p_name, const Ref<EditorSpatialGizmo> &p_gizmo = Ref<EditorSpatialGizmo>());
  
  	virtual String get_name() const;
  	virtual int get_priority() const;
  	virtual bool can_be_hidden() const;
  	virtual bool is_selectable_when_hidden() const;
  
  	virtual void redraw(EditorSpatialGizmo *p_gizmo);
  	virtual String get_handle_name(const EditorSpatialGizmo *p_gizmo, int p_idx) const;
  	virtual Variant get_handle_value(EditorSpatialGizmo *p_gizmo, int p_idx) const;
  	virtual void set_handle(EditorSpatialGizmo *p_gizmo, int p_idx, Camera *p_camera, const Point2 &p_point);
  	virtual void commit_handle(EditorSpatialGizmo *p_gizmo, int p_idx, const Variant &p_restore, bool p_cancel = false);
  	virtual bool is_handle_highlighted(const EditorSpatialGizmo *p_gizmo, int p_idx) const;
  
  	Ref<EditorSpatialGizmo> get_gizmo(Spatial *p_spatial);
  	void set_state(int p_state);
  	int get_state() const;
  	void unregister_gizmo(EditorSpatialGizmo *p_gizmo);
  
  	EditorSpatialGizmoPlugin();
  	virtual ~EditorSpatialGizmoPlugin();
  };
  
  #endif
  