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 * Copyright (c) 2005 Erwin Coumans http://continuousphysics.com/Bullet/
 * Permission to use, copy, modify, distribute and sell this software
 * and its documentation for any purpose is hereby granted without fee,
 * provided that the above copyright notice appear in all copies.
 * Erwin Coumans makes no representations about the suitability 
 * of this software for any purpose.  
 * It is provided "as is" without express or implied warranty.

#include <CollisionShapes/PolyhedralConvexShape.h>
#include "BroadphaseCollision/BroadphaseProxy.h"

///BU_Simplex1to4 implements feature based and implicit simplex of up to 4 vertices (tetrahedron, triangle, line, vertex).
00020 class BU_Simplex1to4 : public PolyhedralConvexShape

      int   m_numVertices;
      SimdPoint3  m_vertices[4];


      BU_Simplex1to4(const SimdPoint3& pt0);
      BU_Simplex1to4(const SimdPoint3& pt0,const SimdPoint3& pt1);
      BU_Simplex1to4(const SimdPoint3& pt0,const SimdPoint3& pt1,const SimdPoint3& pt2);
      BU_Simplex1to4(const SimdPoint3& pt0,const SimdPoint3& pt1,const SimdPoint3& pt2,const SimdPoint3& pt3);

      void  Reset()
            m_numVertices = 0;

      virtual int GetShapeType() const{ return TETRAHEDRAL_SHAPE_PROXYTYPE; }

      void AddVertex(const SimdPoint3& pt);

      //PolyhedralConvexShape interface

      virtual int GetNumVertices() const;

      virtual int GetNumEdges() const;

      virtual void GetEdge(int i,SimdPoint3& pa,SimdPoint3& pb) const;
      virtual void GetVertex(int i,SimdPoint3& vtx) const;

      virtual int GetNumPlanes() const;

      virtual void GetPlane(SimdVector3& planeNormal,SimdPoint3& planeSupport,int i) const;

      virtual int GetIndex(int i) const;

      virtual     bool IsInside(const SimdPoint3& pt,SimdScalar tolerance) const;

      ///GetName is for debugging
00066       virtual  char*    GetName()const { return "BU_Simplex1to4";}



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