planarQuad.h

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//////////////////////////////////////////////////////////////////////
// 6/7/02       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

#if !defined(AFX_PLANARQUAD_H__B5C3452B_60A0_4F40_BB84_19268F764CCC__INCLUDED_)
#define AFX_PLANARQUAD_H__B5C3452B_60A0_4F40_BB84_19268F764CCC__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

#include "planarQuadZ.h"
#include "../texCoordGen/quadTexGen.h"

namespace glift {

//////////////////////////////////////////////////////////////////////////
///
/// planarQuad.h: interface for the PlanarQuad class.
/// 
/// - Defines the vertices and texture coordinates for a planar quad.
/// - All members/methods are handled by 'SinglePrim' base class
/// - Lowerleft and upperRight are assumed to be in the XY plane (only the x,y components are read). 
///   The quad is therefore always orthogonal to the Z axis. 
/// - If 'genTexCoords' is true, but no 'altTexGen' is given, the 'QuadTexGen' texCoord
///   generator is used. The 'altTexGen' parameter is used for alternate tex coord generation.
///
///////////////////////////////////////////////////////////////////////

class _export_ PlanarQuad : public PlanarQuadZ
{
public:
   PlanarQuad( const gutz::vec2f& lowerLeft, const gutz::vec2f& upperRight, /// z=0.0
      bool genTexCoords=false, bool genNorms=false, TexCoordGen* altTexGen=NULL);

   PlanarQuad( const gutz::vec2f& lowerLeft, const gutz::vec2f& upperRight, float z,
      bool genTexCoords=false, bool genNorms=false, TexCoordGen* altTexGen=NULL);

   virtual gutz::vec2f  lowerLeft()     const {return m_lowerLeft;}
   virtual gutz::vec2f  upperRight()    const {return m_upperRight;}
   virtual float                        z()                             const {return m_z;}
   virtual int                          numActivePatches() const {return 1;}
   virtual gutz::vec2i  subDiv()                const {return gutz::vec2i(1,1);}

private:
   gutz::vec2f m_lowerLeft;
   float m_z;
   gutz::vec2f m_upperRight;

   PlanarQuad(); /// Disallow default construction
   gutz::arrayo2f setQuadVertPos( const gutz::vec2f& lowerLeft, const gutz::vec2f& upperRight, float z );
   gutz::arrayo2f setNorm();

   void init( const gutz::vec2f lowerLeft, const gutz::vec2f upperRight, float z,
      bool genTexCoords, bool genNorms, TexCoordGen* texGen );
};

} /// End of namespace glift

#endif /// !defined(AFX_PLANARQUAD_H__B5C3452B_60A0_4F40_BB84_19268F764CCC__INCLUDED_)

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