source: GTP/trunk/App/Demos/Vis/FriendlyCulling/src/ShadowMapping.h @ 2891

#ifndef _ShadowMapping_H__
#define _ShadowMapping_H__

#include "common.h"
#include "glInterface.h"
#include "AxisAlignedBox3.h"
#include "Matrix4x4.h"
#include <Cg/cg.h>
#include <Cg/cgGL.h>



namespace CHCDemoEngine 
{ 

class FrameBufferObject;
class RenderTraverser;
class Vector3;
class Camera;
class Light;

/** This class implements a shadow mapping algorithm
*/
class ShadowMapping
{
public:
        /** constructor for a deferred shader taking the requested shadow size
        */
        ShadowMapping(const AxisAlignedBox3 &sceneBox, int size);

        ~ShadowMapping();
        /** Renders the shadowed scene
        */
        void Render(RenderTraverser *traverser, Camera *cam);
        /** Initialises shadow mapping and loads the required shaders:
                This function has to be called only once.
        */
        static void Init(CGcontext context);

//protected:

        void ComputeShadowMap(Light *light, RenderTraverser *traverser);

protected:

        FrameBufferObject *mFbo;

        int mSize;

        AxisAlignedBox3 mSceneBox;

        Camera *mShadowCam;

        Matrix4x4 mShadowMatrix;

        Light *mLight;
};

} // namespace 
#endif // _DeferredShader_H__