GLRender.h

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/* $Id: GLRenderer.h,v 1.6 2002/12/05 15:05:47 cvs Exp $ */

#ifndef __GL_RENDER_H
#define __GL_RENDER_H

#include <gra/render/Render.h>
#include <gra/framebuffer/FrameBuffer.h>
#include <esg/SceneGraphObject.h>
#include <esg/energy/PolygonalEnergy.h>
#include <gra/shader/Shader.h>
#include <esg/explorer/ObjsInAreaExplorer.h>
#include <GL/gl.h>

using namespace esg;

namespace gra {

class GRA_EXPORT GLRender : public Render {
protected:
        struct TranslucentObj {
                bool               transformed;
                Matrix4            trMat;
                SceneGraphObject * pObject;
        };
    
        GLuint _displayList;
        bool   _useDisplayList;

protected:
        virtual void _render (Shader&      shader,
                              FrameBuffer& fb,
                              Camera&      camera,
                              Scene&       scene);

public:
        GLRender (int  * stopFlag,
                  bool   useDisplayList = true)
            : Render(stopFlag),
              _displayList(0),
              _useDisplayList(useDisplayList) {}

        ~GLRender () { if (_displayList) glDeleteLists(_displayList,1); }

        virtual void clearDisplayList (void) {
            if (!_displayList) return;
            glDeleteLists(_displayList, 1);
            _displayList = 0;
        }

        virtual void useDisplayList (bool use) {
            if (!use) clearDisplayList();
            _useDisplayList = use;
        }

        virtual bool displayListUsed (void) const { return _useDisplayList; }
};

} // namespace

#endif // __GL_RENDER_H

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