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/**************************************************************************/
/*  animation_blend_space_1d.h                                            */
/**************************************************************************/
/*                         This file is part of:                          */
/*                             GODOT ENGINE                               */
/*                        https://godotengine.org                         */
/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur.                  */
/*                                                                        */
/* 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.                 */
/**************************************************************************/

#ifndef ANIMATION_BLEND_SPACE_1D_H
#define ANIMATION_BLEND_SPACE_1D_H

#include "scene/animation/animation_tree.h"

class AnimationNodeBlendSpace1D : public AnimationRootNode {
	GDCLASS(AnimationNodeBlendSpace1D, AnimationRootNode);

	enum {
		MAX_BLEND_POINTS = 64
	};

	struct BlendPoint {
		StringName name;
		Ref<AnimationRootNode> node;
		float position = 0.0;
	};

	BlendPoint blend_points[MAX_BLEND_POINTS];
	int blend_points_used = 0;

	float max_space = 1.0;
	float min_space = -1.0;

	float snap = 0.1;

	String value_label = "value";

	void _add_blend_point(int p_index, const Ref<AnimationRootNode> &p_node);

	void _tree_changed();

	StringName blend_position = "blend_position";

protected:
	bool sync = false;

	void _validate_property(PropertyInfo &p_property) const;
	static void _bind_methods();

public:
	virtual void get_parameter_list(List<PropertyInfo> *r_list) const override;
	virtual Variant get_parameter_default_value(const StringName &p_parameter) const override;

	virtual void get_child_nodes(List<ChildNode> *r_child_nodes) override;

	void add_blend_point(const Ref<AnimationRootNode> &p_node, float p_position, int p_at_index = -1);
	void set_blend_point_position(int p_point, float p_position);
	void set_blend_point_node(int p_point, const Ref<AnimationRootNode> &p_node);

	float get_blend_point_position(int p_point) const;
	Ref<AnimationRootNode> get_blend_point_node(int p_point) const;
	void remove_blend_point(int p_point);
	int get_blend_point_count() const;

	void set_min_space(float p_min);
	float get_min_space() const;

	void set_max_space(float p_max);
	float get_max_space() const;

	void set_snap(float p_snap);
	float get_snap() const;

	void set_value_label(const String &p_label);
	String get_value_label() const;

	void set_use_sync(bool p_sync);
	bool is_using_sync() const;

	double process(double p_time, bool p_seek, bool p_is_external_seeking) override;
	String get_caption() const override;

	Ref<AnimationNode> get_child_by_name(const StringName &p_name) override;

	AnimationNodeBlendSpace1D();
	~AnimationNodeBlendSpace1D();
};

#endif // ANIMATION_BLEND_SPACE_1D_H