Engine directory for ticket #1

Engine/source/collision/polytope.h

@@ -0,0 +1,112 @@
+//-----------------------------------------------------------------------------
+// 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.
+//-----------------------------------------------------------------------------
+
+#ifndef _POLYTOPE_H_
+#define _POLYTOPE_H_
+
+#ifndef _TVECTOR_H_
+#include "core/util/tVector.h"
+#endif
+
+
+//----------------------------------------------------------------------------
+
+class SimObject;
+
+
+//----------------------------------------------------------------------------
+
+class Polytope
+{
+   // Convex Polyhedron
+public:
+   struct Vertex {
+      Point3F point;
+      /// Temp BSP clip info
+      S32 side;
+   };
+   struct Edge {
+      S32 vertex[2];
+      S32 face[2];
+      S32 next;
+   };
+   struct Face {
+      PlaneF plane;
+      S32 original;
+      /// Temp BSP clip info
+      S32 vertex;
+   };
+   struct Volume
+   {
+      S32 edgeList;
+      S32 material;
+      SimObject* object;
+   };
+   struct StackElement
+   {
+      S32 edgeList;
+      const BSPNode *node;
+   };
+   struct Collision {
+      SimObject* object;
+      S32 material;
+      PlaneF plane;
+      Point3F point;
+      F32 distance;
+
+      Collision()
+      {
+         object = NULL;
+         distance = 0.0;
+      }
+   };
+
+   typedef Vector<Edge> EdgeList;
+   typedef Vector<Face> FaceList;
+   typedef Vector<Vertex> VertexList;
+   typedef Vector<Volume> VolumeList;
+   typedef Vector<StackElement> VolumeStack;
+
+   //
+   S32 sideCount;
+   EdgeList mEdgeList;
+   FaceList mFaceList;
+   VertexList mVertexList;
+   VolumeList mVolumeList;
+
+private:
+   bool intersect(const PlaneF& plane,const Point3F& sp,const Point3F& ep);
+
+public:
+   //
+   Polytope();
+   void buildBox(const MatrixF& transform,const Box3F& box);
+   void intersect(SimObject*, const BSPNode* node);
+   inline bool didIntersect()  { return mVolumeList.size() > 1; }
+   void extrudeFace(int fi,const VectorF& vec,Polytope* out);
+   bool findCollision(const VectorF& vec,Polytope::Collision *best);
+};
+
+
+
+
+#endif