Engine directory for ticket #1

Engine/source/math/mQuadPatch.cpp

@@ -0,0 +1,76 @@
+//-----------------------------------------------------------------------------
+// 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.
+//-----------------------------------------------------------------------------
+
+#include "math/mQuadPatch.h"
+
+
+//******************************************************************************
+// Quadratic spline patch
+//******************************************************************************
+QuadPatch::QuadPatch()
+{
+   setNumReqControlPoints(3);
+}
+
+//------------------------------------------------------------------------------
+//------------------------------------------------------------------------------
+void QuadPatch::calcABC( const Point3F *points )
+{
+   a = points[2] - points[1];
+   b = points[1] - points[0];
+   c = points[0];
+}
+
+
+//------------------------------------------------------------------------------
+//------------------------------------------------------------------------------
+void QuadPatch::submitControlPoints( SplCtrlPts &points )
+{
+   Parent::submitControlPoints( points );
+   calcABC( points.getPoint(0) );
+};
+
+
+//------------------------------------------------------------------------------
+//------------------------------------------------------------------------------
+void QuadPatch::setControlPoint( Point3F &point, int index )
+{
+   ( (SplCtrlPts*) getControlPoints() )->setPoint( point, index );
+   calcABC( getControlPoint(0) );
+}
+
+//------------------------------------------------------------------------------
+//------------------------------------------------------------------------------
+void QuadPatch::calc( F32 t, Point3F &result )
+{
+   F32 t2 = t*t;
+   result = a*t2 + b*t + c;
+}
+
+
+//------------------------------------------------------------------------------
+//------------------------------------------------------------------------------
+void QuadPatch::calc( Point3F *points, F32 t, Point3F &result )
+{
+   calcABC( points );
+   calc( t, result );
+}