root/juggler/branches/1.0/Kernel/vjCameraProjection.h

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 *
 * VR Juggler is (C) Copyright 1998, 1999, 2000, 2001, 2002
 *   by Iowa State University
 *
 * Original Authors:
 *   Allen Bierbaum, Christopher Just,
 *   Patrick Hartling, Kevin Meinert,
 *   Carolina Cruz-Neira, Albert Baker
 *
 * This library is free software; you can redistribute it and/or
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#ifndef _VJ_CAMERA_PROJECTION_H_
#define _VJ_CAMERA_PROJECTION_H_

#include <vjConfig.h>
#include <Kernel/vjProjection.h>
class vjMatrix;

//: Projection class that simply takes a matrix for the camera position
//
class vjCameraProjection : public vjProjection
{
public:
   vjCameraProjection()
   {
      mType = vjProjection::SIM;
   }

   virtual void config(vjConfigChunk* chunk)
   {
      vjProjection::config(chunk);

      vjASSERT((std::string)chunk->getType() == std::string("simDisplay"));

      // Set fov and make sure that it is not 0.0
      mVertFOV = chunk->getProperty("vert_fov");
      if(mVertFOV == 0.0f)
         mVertFOV = 60.0f;
      mAspectRatio = chunk->getProperty("aspect_ratio");
      if(mAspectRatio == 0.0f)
         mAspectRatio = 1.0f;
   }

   virtual void calcViewMatrix(vjMatrix& cameraPos)
   {
      mViewMat = cameraPos;
      // XXX: The frustum is not used
      mFrustum.set(-0.6f, 0.6f, -0.6f, 0.6f, mNearDist, mFarDist);
   }

   virtual std::ostream& outStream(std::ostream& out)
   {
      out << "vjCameraProjection:\n";
      return out;
   }

public:
   float mAspectRatio;     // w/h
   float mVertFOV;         // The vertical field of view
};

#endif