Engine directory for ticket #1

Engine/source/scene/zones/scenePolyhedralZone.cpp

@@ -0,0 +1,102 @@
+//-----------------------------------------------------------------------------
+// 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/zones/scenePolyhedralZone.h"
+
+#include "scene/mixin/scenePolyhedralObject.impl.h"
+
+
+//-----------------------------------------------------------------------------
+
+ScenePolyhedralZone::ScenePolyhedralZone( const PolyhedronType& polyhedron )
+   : Parent( polyhedron )
+{
+}
+
+//-----------------------------------------------------------------------------
+
+bool ScenePolyhedralZone::onAdd()
+{
+   if( !Parent::onAdd() )
+      return false;
+
+   // Precompute polyhedron/AABB intersection data, if not
+   // a trivial box polyhedron.
+
+   if( !mIsBox )
+   {
+      _updateIntersector();
+
+      // Also need to update OBB.
+      _updateOrientedWorldBox();
+   }
+      
+   return true;
+}
+
+//-----------------------------------------------------------------------------
+
+void ScenePolyhedralZone::setTransform( const MatrixF& mat )
+{
+   Parent::setTransform( mat );
+
+   // Recompute intersection data.
+
+   if( !mIsBox )
+      _updateIntersector();
+}
+
+//-----------------------------------------------------------------------------
+
+void ScenePolyhedralZone::_updateOrientedWorldBox()
+{
+   if( mIsBox )
+      Parent::_updateOrientedWorldBox();
+   else
+      mOrientedWorldBox.set( getTransform(), Point3F( mObjBox.len_x(), mObjBox.len_y(), mObjBox.len_z() ) );
+}
+
+//-----------------------------------------------------------------------------
+
+bool ScenePolyhedralZone::getOverlappingZones( const Box3F& aabb, U32* outZones, U32& outNumZones )
+{
+   // If a trivial box, let parent handle this.
+
+   if( mIsBox )
+      return Parent::getOverlappingZones( aabb, outZones, outNumZones );
+
+   // Otherwise, use the intersector.
+
+   OverlapTestResult overlap = mIntersector.test( aabb );
+   
+   if( overlap == GeometryOutside )
+   {
+      outNumZones = 0;
+      return true;
+   }
+
+   outZones[ 0 ] = getZoneRangeStart();
+   outNumZones = 1;
+
+   return ( overlap != GeometryInside );
+}