Engine directory for ticket #1

Engine/source/scene/sceneCameraState.cpp

@@ -0,0 +1,65 @@
+//-----------------------------------------------------------------------------
+// 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 "scene/sceneCameraState.h"
+
+#include "gfx/gfxDevice.h"
+
+
+//-----------------------------------------------------------------------------
+
+SceneCameraState::SceneCameraState( const RectI& viewport, const Frustum& frustum, const MatrixF& worldView, const MatrixF& projection )
+   : mViewport( viewport ),
+     mFrustum( frustum ),
+     mWorldViewMatrix( worldView ),
+     mProjectionMatrix( projection )
+{
+   mViewDirection = frustum.getTransform().getForwardVector();
+}
+
+//-----------------------------------------------------------------------------
+
+SceneCameraState SceneCameraState::fromGFX()
+{
+   return fromGFXWithViewport( GFX->getViewport() );
+}
+
+//-----------------------------------------------------------------------------
+
+SceneCameraState SceneCameraState::fromGFXWithViewport( const RectI& viewport )
+{
+   const MatrixF& world = GFX->getWorldMatrix();
+   
+   MatrixF camera = world;
+   camera.inverse();
+
+   Frustum frustum = GFX->getFrustum();
+   frustum.setTransform( camera );
+
+   return SceneCameraState(
+      viewport,
+      frustum,
+      world,
+      GFX->getProjectionMatrix()
+   );
+}