Engine directory for ticket #1

Engine/source/collision/extrudedPolyList.h

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+//-----------------------------------------------------------------------------
+// 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 _EXTRUDEDPOLYLIST_H_
+#define _EXTRUDEDPOLYLIST_H_
+
+#ifndef _MMATH_H_
+#include "math/mMath.h"
+#endif
+
+#ifndef _MPOLYHEDRON_H_
+#include "math/mPolyhedron.h"
+#endif
+
+#ifndef _TVECTOR_H_
+#include "core/util/tVector.h"
+#endif
+
+#ifndef _ABSTRACTPOLYLIST_H_
+#include "collision/abstractPolyList.h"
+#endif
+
+
+class CollisionList;
+
+
+//----------------------------------------------------------------------------
+/// Extruded Polytope PolyList
+///
+/// This class is used primarily for collision detection, by objects which need
+/// to check for obstructions along their path. You feed it a polytope to
+/// extrude along the direction of movement, and it gives you a list of collisions.
+/// 
+/// @see AbstractPolyList
+class ExtrudedPolyList: public AbstractPolyList
+{
+public:
+   struct Vertex {
+      Point3F point;
+      U32 mask;
+   };
+
+   struct Poly {
+      PlaneF plane;
+      SceneObject* object;
+      BaseMatInstance* material;
+   };
+
+   struct ExtrudedFace {
+      bool active;
+      PlaneF plane;
+      F32 maxDistance;
+      U32 planeMask;
+      F32 faceDot;
+      F32 faceShift;
+      F32 time;
+      Point3F point;
+      F32 height;
+   };
+
+   typedef Vector<ExtrudedFace> ExtrudedList;
+   typedef Vector<PlaneF> PlaneList;
+   typedef Vector<Vertex> VertexList;
+   typedef Vector<U32> IndexList;
+
+   static F32 EqualEpsilon;
+   static F32 FaceEpsilon;
+
+   // Internal data
+   VertexList   mVertexList;
+   IndexList    mIndexList;
+   ExtrudedList mExtrudedList;
+   PlaneList    mPlaneList;
+   VectorF      mVelocity;
+   VectorF      mNormalVelocity;
+   F32          mFaceShift;
+   Poly         mPoly;
+
+   // Returned info
+   CollisionList* mCollisionList;
+
+   PlaneList mPolyPlaneList;
+   
+   //
+private:
+   bool testPoly(ExtrudedFace&);
+
+public:
+   ExtrudedPolyList();
+   ~ExtrudedPolyList();
+   void extrude(const Polyhedron&, const VectorF& vec);
+   void setVelocity(const VectorF& velocity);
+   void setCollisionList(CollisionList*);
+   void adjustCollisionTime();
+
+   // Virtual methods
+   bool isEmpty() const;
+   U32  addPoint(const Point3F& p);
+   U32  addPlane(const PlaneF& plane);
+   void begin(BaseMatInstance* material, U32 surfaceKey);
+   void plane(U32 v1,U32 v2,U32 v3);
+   void plane(const PlaneF& p);
+   void plane(const U32 index);
+   void vertex(U32 vi);
+   void end();
+
+  protected:
+   const PlaneF& getIndexedPlane(const U32 index);
+};
+
+#endif