shadedPrim.h

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//////////////////////////////////////////////////////////////////////
// 6/12/02      Aaron Lefohn    Scientific Computing and Imaging Institute
// School of Computing          University of Utah
//
//  This library is free software; you can redistribute it and/or
//  modify it under the terms of the GNU Lesser General Public
//  License as published by the Free Software Foundation; either
//  version 2.1 of the License, or (at your option) any later version.
//
//  This library is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
//  Lesser General Public License for more details.
//
//  You should have received a copy of the GNU Lesser General Public
//  License along with this library; if not, write to the Free Software
//  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
#ifndef GLIFT_SHADED_PRIM_H__
#define GLIFT_SHADED_PRIM_H__

#include "drawableGLI.h"
#include "rawPrim.h"
#include "../state/shader.h"
#include <mathGutz.h>
#include <arrayGutz.h>

namespace glift {

/////////////////////////////////////////////////////////////////////////
///
///  ShadedPrim - The class that binds a shader and primitive together
///  
///  - If 'prim' is a 'RawPrim':
///  - Texture scale/bias and texCoordConsts get applied here.
///  - Multitexturing coordinates get created based on the number of \n
///       textures defined in the shader's texture scale/bias information
///  - If 'prim' is a 'ShadedPrim'
///  - Simply binds the 'shader' around the 'prim' w/out attempting \n
///       to generate multi- or perturbed texture coordinates.
/// 
/// ShadedPrim
////////////////////////////////
class _export_ ShadedPrim : public DrawableGLI
{
public: 
   ShadedPrim( DrawableGLI* prim, Shader* shader );

   ShadedPrim( const ShadedPrim& rhs);
   ShadedPrim& operator=(const ShadedPrim& rhs);
   virtual ~ShadedPrim();

   /// Set a new 'm_prim' and 'm_rawPrim' if 'prim' is non-NULL
   /// - Note: The texture coords are NOT altered...just the primitive.
   /// - VERY DANGEROUS. Designed to be fast, not safe
   void setPrim( DrawableGLI*  prim );

   /// Set the texture coords used if 'texCoordsPtr' is non-NULL
   /// - Note: No checks are done to ensure compatibility between vertices, texCoords, shaders, etc.
   /// - DANGEROUS. Designed to be fast, not safe
   void setTexCoordPtr( MultiPrimTexCoord* texCoordsPtr );

protected:
   virtual void drawDef();

private:
   DrawableGLI*         m_prim;                 /// The primitive
   RawPrim*                     m_rawPrim;              /// Pointer to m_prim if a 'RawPrim' was passed in. Otherwise it is NULL.
   Shader*                      m_shader;               /// The shader
   MultiPrimTexCoord*   m_texCoordsPtr; /// The generated multi- and/or perturbed texture coordinates
   GLuint                               m_dispList;

   ShadedPrim();
   void initMembers( DrawableGLI* prim, RawPrim* rawPrim, Shader* shader, MultiPrimTexCoord* texCoordsPtr );
   void initMembers( const ShadedPrim& rhs );
};

}

#endif

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