source: GTP/branches/IllumWPdeliver2008dec/IlluminationWP/precompiled/include/IllumModule/RenderingRuns/ChildPSystemRenderingRun.h @ 3255

#pragma once
#include "RenderingRun.h"

/**
        @brief Base abstract class __declspec( dllexport ) that defines a rendering process of a particle system impostor image.

        This impostor can be used as a texture for ither particle systems. This rendering method is called hieararchical particle system.
*/
class __declspec( dllexport ) ChildPsystemRenderingRun : virtual public RenderingRun
{       
public:
        /**
                @brief Constructor.

                @param resolution               the resolution of the impostor image
                @param perspectiveRendering             sets if the impostor should be rendered with a perspective projection or orthogonal
                @param startFrame                               adds an offset to the current frame number to help evenly distribute updates between frames
                @param updateInterval                   update frequency
        */
        ChildPsystemRenderingRun(
                                                        unsigned int resolution,
                                                        bool perspectiveRendering,
                                                        unsigned long startFrame,
                                                        unsigned long updateInterval)
                                                        :RenderingRun(startFrame, updateInterval)
        {
                this->resolution = resolution;
                this->perspectiveRendering = perspectiveRendering;
        }

        virtual ~ChildPsystemRenderingRun(){}

protected:
        /**
                @brief the resolution of the impostor image
        */
        unsigned int resolution;
        /**
                @brief sets if the impostor should be rendered with a perspective projection or orthogonal
        */
        bool perspectiveRendering;
    //inherited
        virtual void updateFrame(unsigned long frameNum) = 0;   
        /**
                @brief Creates an impostor texture that can be used as a rendertarget during impostor rendering.
        */
        virtual inline void createImpostorTexture() = 0;        
};