/*************************************************************************/
/*  path.h                                                               */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
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/* Copyright (c) 2007-2018 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2018 Godot Engine contributors (cf. AUTHORS.md)    */
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/* 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 */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
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/* 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 PATH_H
#define PATH_H

#include "scene/3d/spatial.h"
#include "scene/resources/curve.h"

class Path : public Spatial {

	GDCLASS(Path, Spatial);

	Ref<Curve3D> curve;

	void _curve_changed();

protected:
	void _notification(int p_what);
	static void _bind_methods();

public:
	void set_curve(const Ref<Curve3D> &p_curve);
	Ref<Curve3D> get_curve() const;

	Path();
};

class PathFollow : public Spatial {

	GDCLASS(PathFollow, Spatial);

public:
	enum RotationMode {

		ROTATION_NONE,
		ROTATION_Y,
		ROTATION_XY,
		ROTATION_XYZ
	};

private:
	Path *path;
	real_t delta_offset; // change in offset since last _update_transform
	real_t offset;
	real_t h_offset;
	real_t v_offset;
	bool cubic;
	bool loop;
	RotationMode rotation_mode;

	void _update_transform();

protected:
	virtual void _validate_property(PropertyInfo &property) const;

	void _notification(int p_what);
	static void _bind_methods();

public:
	void set_offset(float p_offset);
	float get_offset() const;

	void set_h_offset(float p_h_offset);
	float get_h_offset() const;

	void set_v_offset(float p_v_offset);
	float get_v_offset() const;

	void set_unit_offset(float p_unit_offset);
	float get_unit_offset() const;

	void set_loop(bool p_loop);
	bool has_loop() const;

	void set_rotation_mode(RotationMode p_rotation_mode);
	RotationMode get_rotation_mode() const;

	void set_cubic_interpolation(bool p_enable);
	bool get_cubic_interpolation() const;

	PathFollow();
};

VARIANT_ENUM_CAST(PathFollow::RotationMode);

class OrientedPathFollow : public Spatial {

	GDCLASS(OrientedPathFollow, Spatial);

private:
	Path *path;
	real_t delta_offset; // change in offset since last _update_transform
	real_t offset;
	real_t h_offset;
	real_t v_offset;
	bool cubic;
	bool loop;

	void _update_transform();

protected:
	virtual void _validate_property(PropertyInfo &property) const;

	void _notification(int p_what);
	static void _bind_methods();

public:
	void set_offset(float p_offset);
	float get_offset() const;

	void set_h_offset(float p_h_offset);
	float get_h_offset() const;

	void set_v_offset(float p_v_offset);
	float get_v_offset() const;

	void set_unit_offset(float p_unit_offset);
	float get_unit_offset() const;

	void set_loop(bool p_loop);
	bool has_loop() const;

	void set_cubic_interpolation(bool p_enable);
	bool get_cubic_interpolation() const;

	OrientedPathFollow();
};

#endif // PATH_H
