godot/scene/3d/velocity_tracker_3d.h

/*************************************************************************/
/*  velocity_tracker_3d.h                                                */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                      https://godotengine.org                          */
/*************************************************************************/
/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur.                 */
/* Copyright (c) 2014-2021 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   */
/* 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 SPATIAL_VELOCITY_TRACKER_H
#define SPATIAL_VELOCITY_TRACKER_H

#include "scene/3d/node_3d.h"

class VelocityTracker3D : public Reference {
	GDCLASS(VelocityTracker3D, Reference);

	struct PositionHistory {
		uint64_t frame;
		Vector3 position;
	};

	bool physics_step;
	Vector<PositionHistory> position_history;
	int position_history_len;

protected:
	static void _bind_methods();

public:
	void reset(const Vector3 &p_new_pos);
	void set_track_physics_step(bool p_track_physics_step);
	bool is_tracking_physics_step() const;
	void update_position(const Vector3 &p_position);
	Vector3 get_tracked_linear_velocity() const;

	VelocityTracker3D();
};

#endif // SPATIAL_VELOCITY_TRACKER_H