Engine directory for ticket #1

Engine/source/math/util/quadTransforms.h

@@ -0,0 +1,82 @@
+//-----------------------------------------------------------------------------
+// Copyright (c) 2012 GarageGames, LLC
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to
+// deal in the Software without restriction, including without limitation the
+// rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+// sell copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+// IN THE SOFTWARE.
+//-----------------------------------------------------------------------------
+
+#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_