DtPlanarReflection.h

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/******************************************************************************
** Copyright (c) 2013 MAK Technologies, Inc.
** All rights reserved.
******************************************************************************/


#pragma once

#include <vrvUtil/DtSignalConnectionManager.h>

#include <osg/Camera>
#include <osg/ClipNode>
#include <osg/Texture2D>

// Whether to use an oblique frustum plane or an OpenGL clip plane
// for reflection clipping at the waterline.
// Remember to also uncomment assignment of gl_ClipVertex in uber_vs.glsl if
// you use OpenGL clip planes.
#define USE_OBLIQUE_CLIP_PLANE

namespace makVrv
{
   class DtDe;
   class DtOsgCullVisitor;
   class DtPlanarReflection : public osg::Camera
   {
   public:
      DtPlanarReflection( osg::Camera * mainCamera, DtDe& de );

      osg::Texture2D * getTexture();

      osg::RefMatrix * getTextureProjectionMatrix();

      // Override Node::accept to intercept cull visitor traversal
      virtual void accept(osg::NodeVisitor& nv);

      // Enable / disable this reflection camera at runtime.
      virtual void enable(bool enabled);

      virtual void releaseGLObjects(osg::State* state = 0);

#ifdef USE_OBLIQUE_CLIP_PLANE
      void setClipPlane(const osg::Vec4d& v) {myClipPlane = v;}
#endif
      bool isRenderToTextureValid();

      void setMirrorMatrix(const osg::Matrix& mirror) { myMirrorMatrix = mirror; }

   protected:
      virtual void lodScaleChanged( float lodScale );

      osg::Matrixd modifyProjectionMatrix(const osg::Matrix& sceneProjection, const osg::Vec4d& clipPlane) const;

      virtual ~DtPlanarReflection();

      void setupColorBufferTexture(int format, int sourceFormat, int sourceType);

   protected:
      DtDe& myDe;
      DtSignalConnectionManager myConnections;

      osg::ref_ptr< osg::Texture2D > myTexture, myDepthTexture;
      osg::ref_ptr< osg::RefMatrix > myTextureProjectionMatrix;
      osg::ref_ptr< osg::Camera >    mySceneCamera;

      osg::Matrix myMirrorMatrix;

      int myTexFormat;
      int mySourceFormat;
      int mySourceType;
     

#ifdef USE_OBLIQUE_CLIP_PLANE
      osg::Vec4d myClipPlane;
#endif
   };
}