source: GTP/trunk/Lib/Illum/IllumModule/IllumModule/include/RenderTechniques/HierarchicalParticleSystemTechnique.h @ 1062

#pragma once
#include "RenderTechnique.h"

/**
        @brief Base abstract class of rendering a particle system with the spherical billboard method.  
*/
class HierarchicalParticleSystemTechnique : virtual public RenderTechnique
{
public:
        /**
                @brief Constructor.

                @param parentRenderable the object to operate on
                @param parentTechniqueGroup the TechniqueGroup this RenderedTechnique is attached to
        */
        HierarchicalParticleSystemTechnique(
                                                        unsigned long startFrame,
                                                        unsigned long impostorUpdateInterval,
                                                        unsigned int impostorResolution,
                                                        bool useDistCalc,
                                                        bool perspectiveRendering,
                                                        ElementaryRenderable* parentRenderable,
                                                        TechniqueGroup* parentTechniqueGroup
                                                        );
        ~HierarchicalParticleSystemTechnique();

        void update(unsigned long frameNum);

        //inherited
        void runChanged(RenderingRunType runType, RenderingRun* run);

protected:
        unsigned long impostorUpdateInterval;
        unsigned int impostorResolution;
        /**
                        @brief offset in frame number used during update
        */
        unsigned long startFrame;       
        bool useDistCalc;
        bool perspectiveRendering;

        virtual RenderingRun* createChildPSysRenderingRun()=0;
        virtual void impostorChanged(RenderingRun* run) = 0;
        
};