shadbuf.h

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/**********************************************************************
 *<
    FILE: shadbuf.h : Shadow buffer renderer.

    DESCRIPTION:

    CREATED BY: Dan Silva

    HISTORY:

 *> Copyright (c) 1994, All Rights Reserved.
 **********************************************************************/

#pragma once
#include <WTypes.h>
#include "maxheap.h"
#include "matrix3.h"

// forward declarations
class RendContext;
class RenderGlobalContext;
class ObjLightDesc;

class ShadBufRenderer: public MaxHeapOperators {
    public:
        virtual int Render(
            RendContext &rc, 
            RenderGlobalContext *RGC, 
            float *buf,         // preallocated (shadsize*shadsize)  floats 
            BOOL parallel,      // parallel or perspective projection
            int shadsize,      // size of the buffer (shadsize by shadsize pixels)
            float param,       // persp:field-of-view (radians) -- parallel : width in world coords
            float aspect,      // aspect ration of the buffer projection 
            float clipDist,    // don't consider objects farther than this from light
            ObjLightDesc *ltDesc, // descriptor for light that was passed in to CreateShadowGenerator
            Matrix3 worldToLight  // world to light transfor for light
            )=0;
        virtual float Furthest()=0; // after render, this gives the farthest Z in the buffer
        virtual float Closest()=0;  // after render, this gives the closest Z in the buffer.
        virtual void DeleteThis()=0;
    };

CoreExport ShadBufRenderer *NewDefaultShadBufRenderer();