Engine directory for ticket #1

Engine/source/ts/collada/colladaExtensions.cpp

@@ -0,0 +1,62 @@
+//-----------------------------------------------------------------------------
+// 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 "platform/platform.h"
+
+#include "math/mRandom.h"
+#include "ts/collada/colladaExtensions.h"
+
+/// Check if any of the MAYA texture transform elements are animated within
+/// the interval
+bool ColladaExtension_effect::animatesTextureTransform(F32 start, F32 end)
+{
+   return repeatU.isAnimated(start, end)           || repeatV.isAnimated(start, end)         ||
+          offsetU.isAnimated(start, end)           || offsetV.isAnimated(start, end)         ||
+          rotateUV.isAnimated(start, end)          || noiseU.isAnimated(start, end)          ||
+          noiseV.isAnimated(start, end);
+}
+
+/// Apply the MAYA texture transform to the given UV coordinates
+void ColladaExtension_effect::applyTextureTransform(Point2F& uv, F32 time)
+{
+   // This function will be called for every tvert, every frame. So cache the
+   // texture transform parameters to avoid interpolating them every call (since
+   // they are constant for all tverts for a given 't')
+   if (time != lastAnimTime) {
+      // Update texture transform
+      textureTransform.set(EulerF(0, 0, rotateUV.getValue(time)));
+      textureTransform.setPosition(Point3F(
+         offsetU.getValue(time) + noiseU.getValue(time)*gRandGen.randF(),
+         offsetV.getValue(time) + noiseV.getValue(time)*gRandGen.randF(),
+         0));
+      textureTransform.scale(Point3F(repeatU.getValue(time), repeatV.getValue(time), 1.0f));
+
+      lastAnimTime = time;
+   }
+
+   // Apply texture transform
+   Point3F result;
+   textureTransform.mulP(Point3F(uv.x, uv.y, 0), &result);
+
+   uv.x = result.x;
+   uv.y = result.y;
+}