/*=========================================================================
                                                                                
  Program:   Insight Segmentation & Registration Toolkit
  Module:    $RCSfile: SNAPOpenGL.h,v $
  Language:  C++
  Date:      $Date: 2005/12/19 03:43:11 $
  Version:   $Revision: 1.6 $
  Copyright (c) 2003 Insight Consortium. All rights reserved.
  See ITKCopyright.txt or http://www.itk.org/HTML/Copyright.htm for details.
                                                                                
     This software is distributed WITHOUT ANY WARRANTY; without even
     the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
     PURPOSE.  See the above copyright notices for more information.
=========================================================================*/
#ifndef __SNAPOpenGL_h_
#define __SNAPOpenGL_h_


#include "IRISVectorTypes.h"

// Include OpenGL headers according to the platform
#ifdef __APPLE__
  #include <GL/glu.h>
  #include <FL/gl.h>
#else
  #include <FL/gl.h>
  #include <GL/glu.h>
#endif

#ifndef _WIN32
  #ifndef GLU_VERSION_1_2
    #define GLU_VERSION_1_2
  #endif
#endif

// Inline functions for use with vector classes
inline void glVertex( const Vector3f &x ) { glVertex3fv(x.data_block()); }
inline void glVertex( const Vector3d &x ) { glVertex3dv(x.data_block()); }

inline void glVertex( const Vector3i &x )
{
#if defined(__APPLE__)
    const GLint CastConvertTemp[3]={static_cast<GLint>(x[0]),static_cast<GLint>(x[1]),static_cast<GLint>(x[2])};
    glVertex3iv(CastConvertTemp);//NOTE:  On Mac GLint is a long integer, so we must create a long integer vector to send to glVertex3iv.
    //A more elegant solution could be made if partial template specialization were allowed.
    //Perhaps Vector3i could be defined in terms of GLint instead of int
#else
    glVertex3iv(x.data_block());
#endif
}
inline void glVertex( const Vector2f &x ) { glVertex2fv(x.data_block()); }
inline void glVertex( const Vector2d &x ) { glVertex2dv(x.data_block()); }

inline void glVertex( const Vector2i &x )
{
#if defined(__APPLE__)
    const GLint CastConvertTemp[2]={static_cast<GLint>(x[0]),static_cast<GLint>(x[1])};
    glVertex2iv(CastConvertTemp);//NOTE:  On Mac GLint is a long integer, so we must create a long integer vector to send to glVertex3iv.
    //A more elegant solution could be made if partial template specialization were allowed.
    //Perhaps Vector2i could be defined in terms of GLint instead of int
#else
    glVertex2iv(x.data_block());
#endif
}

inline void glTranslate( const Vector3f &x ) { glTranslatef(x[0],x[1],x[2]); }
inline void glTranslate( const Vector3d &x ) { glTranslated(x[0],x[1],x[2]); }

inline void glScale( const Vector3f &x ) { glScalef(x[0],x[1],x[2]); }
inline void glScale( const Vector3d &x ) { glScaled(x[0],x[1],x[2]); }


#endif // __SNAPOpenGL_h_