Torque3D/Engine/source/math/util/quadTransforms.h

//-----------------------------------------------------------------------------
// Copyright (c) 2012 GarageGames, LLC
//
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// deal in the Software without restriction, including without limitation the
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//-----------------------------------------------------------------------------

#ifndef _QUADTOQUADTRANSFORMS_H_
#define _QUADTOQUADTRANSFORMS_H_

#ifndef _MPOINT2_H_
#include "math/mPoint2.h"
#endif
#ifndef _MPOINT3_H_
#include "math/mPoint3.h"
#endif
#ifndef _MMATRIX_H_
#include "math/mMatrix.h"
#endif

// NOTE: The code in these classes originate from the Wild Magic Source Code
// library by David Eberly and is used with permission.


/// This class does bilinear mapping of quadrilateral to a square.
class BiQuadToSqr
{
public:

   /// Constructs the transform class from the quadrilateral
   /// points in counter clockwise order.
   BiQuadToSqr(   const Point2F &p00, 
                  const Point2F &p10,
                  const Point2F &p11, 
                  const Point2F &p01 );

   /// Transforms the point.
   Point2F transform( const Point2F &p ) const;

protected:

   static F32 deviation( const Point2F &sp );

   Point2F m_kP00, m_kB, m_kC, m_kD;

   F32 m_fBC, m_fBD, m_fCD;

};


class BiSqrToQuad3D
{
public:

   BiSqrToQuad3D( const Point3F &pnt00, 
                  const Point3F &pnt10,
                  const Point3F &pnt11, 
                  const Point3F &pnt01 );

   Point3F transform( const Point2F &pnt ) const;

protected:

   Point3F p00, p01, p10, p11;
};

#endif // _QUADTOQUADTRANSFORMS_H_