godot/servers/visual/particle_system_sw.h

/*************************************************************************/
/*  particle_system_sw.h                                                 */
/*************************************************************************/
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/*                           GODOT ENGINE                                */
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/* Copyright (c) 2007-2016 Juan Linietsky, Ariel Manzur.                 */
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#ifndef PARTICLE_SYSTEM_SW_H
#define PARTICLE_SYSTEM_SW_H

/**
	@author Juan Linietsky <reduzio@gmail.com>
*/

#include "servers/visual_server.h"

struct ParticleSystemSW {
	enum {

		MAX_PARTICLES=1024
	};

	float particle_vars[VS::PARTICLE_VAR_MAX];
	float particle_randomness[VS::PARTICLE_VAR_MAX];

	Vector3 emission_half_extents;
	DVector<Vector3> emission_points;
	Vector3 gravity_normal;
	Vector3 emission_base_velocity;
	int amount;
	bool emitting;
	bool height_from_velocity;
	AABB visibility_aabb;
	bool sort;
	bool local_coordinates;

	struct ColorPhase {

		float pos;
		Color color;
		ColorPhase() { pos=1.0; color=Color(0.0,0.0,1.0,1.0); }
	};

	int color_phase_count;
	ColorPhase color_phases[VS::MAX_PARTICLE_COLOR_PHASES];


	struct Attractor {

		Vector3 pos;
		float force;
	};

	int attractor_count;
	Attractor attractors[VS::MAX_PARTICLE_ATTRACTORS];


	ParticleSystemSW();
	~ParticleSystemSW();

};


struct ParticleSystemProcessSW {

	enum {
		PARTICLE_RANDOM_NUMBERS = 8,
	};

	struct ParticleData {

		Vector3 pos;
		Vector3 vel;
		float rot;
		bool active;
		float random[PARTICLE_RANDOM_NUMBERS];

		ParticleData() { active=0; rot=0; }
	};


	bool valid;
	float particle_system_time;
	uint32_t rand_seed;
	Vector<ParticleData> particle_data;

	void process(const ParticleSystemSW *p_system,const Transform& p_transform,float p_time);

	ParticleSystemProcessSW();
};

struct ParticleSystemDrawInfoSW {

	struct ParticleDrawInfo {

		const ParticleSystemProcessSW::ParticleData *data;
		float d;
		Transform transform;
		Color color;

	};

	ParticleDrawInfo draw_info[ParticleSystemSW::MAX_PARTICLES];
	ParticleDrawInfo *draw_info_order[ParticleSystemSW::MAX_PARTICLES];

	void prepare(const ParticleSystemSW *p_system,const ParticleSystemProcessSW *p_process,const Transform& p_system_transform,const Transform& p_camera_transform);

};

#endif