Engine directory for ticket #1

Engine/source/math/mPlaneTransformer.cpp

@@ -0,0 +1,71 @@
+//-----------------------------------------------------------------------------
+// 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/mPlaneTransformer.h"
+#include "math/mMathFn.h"
+
+void PlaneTransformer::set(const MatrixF& xform, const Point3F& scale)
+{
+   mTransform = xform;
+   mScale     = scale;
+
+   MatrixF scaleMat(true);
+   F32* m = scaleMat;
+   m[MatrixF::idx(0, 0)] = scale.x;
+   m[MatrixF::idx(1, 1)] = scale.y;
+   m[MatrixF::idx(2, 2)] = scale.z;
+
+   mTransposeInverse = xform;
+   mTransposeInverse.mul(scaleMat);
+   mTransposeInverse.transpose();
+   mTransposeInverse.inverse();
+}
+
+void PlaneTransformer::transform(const PlaneF& plane, PlaneF& result)
+{
+   Point3F point = plane;
+   point *= -plane.d;
+   point.convolve(mScale);
+   mTransform.mulP(point);
+
+   Point3F normal = plane;
+   mTransposeInverse.mulV(normal);
+
+   result.set(point, normal);
+//   mTransformPlane(mTransform, mScale, plane, &result);
+}
+
+void PlaneTransformer::setIdentity()
+{
+   static struct MakeIdentity
+   {
+      PlaneTransformer  transformer;
+      MakeIdentity()
+      {
+         MatrixF  defMat(true);
+         Point3F  defScale(1.0f, 1.0f, 1.0f);
+         transformer.set(defMat, defScale);
+      }
+   } sMakeIdentity;
+
+   *this = sMakeIdentity.transformer;
+}