ParticleEngine.h

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////////////////////////////////////////////////////////////////////////////////
//    Scorched3D (c) 2000-2009
//
//    This file is part of Scorched3D.
//
//    Scorched3D is free software; you can redistribute it and/or modify
//    it under the terms of the GNU General Public License as published by
//    the Free Software Foundation; either version 2 of the License, or
//    (at your option) any later version.
//
//    Scorched3D is distributed in the hope that it will be useful,
//    but WITHOUT ANY WARRANTY; without even the implied warranty of
//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//    GNU General Public License for more details.
//
//    You should have received a copy of the GNU General Public License
//    along with Scorched3D; if not, write to the Free Software
//    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
////////////////////////////////////////////////////////////////////////////////

#if !defined(__INCLUDE_ParticleEngineh_INCLUDE__)
#define __INCLUDE_ParticleEngineh_INCLUDE__

#include <graph/Particle.h>
#include <engine/GameStateI.h>

class GLCamera;
class ParticleEngine : public GameStateI
{
public:
        ParticleEngine(GLCamera *camera, unsigned int maxParticles);
        virtual ~ParticleEngine();

        void setMaxParticles(unsigned int maxParticles);
        unsigned int getMaxParticles();
        unsigned int getParticlesOnScreen();
        GLCamera *getCamera() { return camera_; }
        void setAllowSorting(bool sorting) { allowSorting_ = sorting; }

        void killAll();

        Particle *getNextAliveParticle();

        static void setFast(float speedMult) { speed_ = speedMult; }
        static float getFast() { return speed_; }

        // Inherited from GameStateI
        virtual void draw(const unsigned state);
        virtual void simulate(const unsigned int state, float simTime);

protected:
        Particle *particles_;
        Particle **usedParticles_;
        Particle **freeParticles_;
        GLCamera *camera_;

        float totalTime_;
        unsigned int maxParticles_;
        unsigned int particlesOnScreen_;
        bool allowSorting_;

        static float speed_;

        void normalizedSimulate(float time);

};

#endif // __INCLUDE_ParticleEngineh_INCLUDE__

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