godot/scene/2d/path_2d.h

/*************************************************************************/
/*  path_2d.h                                                            */
/*************************************************************************/
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/*                           GODOT ENGINE                                */
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/* Copyright (c) 2007-2022 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2022 Godot Engine contributors (cf. AUTHORS.md).   */
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#ifndef PATH_2D_H
#define PATH_2D_H

#include "scene/2d/node_2d.h"
#include "scene/resources/curve.h"

class Path2D : public Node2D {
	GDCLASS(Path2D, Node2D);

	Ref<Curve2D> curve;

	void _curve_changed();

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

public:
#ifdef TOOLS_ENABLED
	virtual Rect2 _edit_get_rect() const override;
	virtual bool _edit_use_rect() const override;
	virtual bool _edit_is_selected_on_click(const Point2 &p_point, double p_tolerance) const override;
#endif

	void set_curve(const Ref<Curve2D> &p_curve);
	Ref<Curve2D> get_curve() const;

	Path2D() {}
};

class PathFollow2D : public Node2D {
	GDCLASS(PathFollow2D, Node2D);

public:
private:
	Path2D *path = nullptr;
	real_t progress = 0.0;
	real_t h_offset = 0.0;
	real_t v_offset = 0.0;
	real_t lookahead = 4.0;
	bool cubic = true;
	bool loop = true;
	bool rotates = true;

	void _update_transform();

protected:
	void _validate_property(PropertyInfo &p_property) const;

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

public:
	void set_progress(real_t p_progress);
	real_t get_progress() const;

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

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

	void set_progress_ratio(real_t p_ratio);
	real_t get_progress_ratio() const;

	void set_lookahead(real_t p_lookahead);
	real_t get_lookahead() const;

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

	void set_rotates(bool p_rotates);
	bool is_rotating() const;

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

	PackedStringArray get_configuration_warnings() const override;

	PathFollow2D() {}
};

#endif // PATH_2D_H