renamed ConcaveShape to btConcaveShape

added btHeightfieldTerrainShape (not done yet)

src/BulletCollision/CollisionShapes/btHeightfieldTerrainShape.h

@@ -0,0 +1,58 @@
+/*
+Bullet Continuous Collision Detection and Physics Library
+Copyright (c) 2003-2006 Erwin Coumans  http://continuousphysics.com/Bullet/
+
+This software is provided 'as-is', without any express or implied warranty.
+In no event will the authors be held liable for any damages arising from the use of this software.
+Permission is granted to anyone to use this software for any purpose, 
+including commercial applications, and to alter it and redistribute it freely, 
+subject to the following restrictions:
+
+1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required.
+2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
+3. This notice may not be removed or altered from any source distribution.
+*/
+
+#ifndef HEIGHTFIELD_TERRAIN_SHAPE_H
+#define HEIGHTFIELD_TERRAIN_SHAPE_H
+
+#include "BulletCollision/CollisionShapes/btConcaveShape.h"
+
+///btHeightfieldTerrainShape simulates a 2D heightfield terrain 
+class btHeightfieldTerrainShape : public btConcaveShape
+{
+protected:
+	btVector3	m_localAabbMin;
+	btVector3	m_localAabbMax;
+	
+	//todo: terrain data
+
+	btVector3	m_localScaling;
+
+public:
+	btHeightfieldTerrainShape();
+
+	virtual ~btHeightfieldTerrainShape();
+
+
+	virtual int	getShapeType() const
+	{
+		return TERRAIN_SHAPE_PROXYTYPE;
+	}
+
+	virtual void getAabb(const btTransform& t,btVector3& aabbMin,btVector3& aabbMax) const;
+
+	virtual void	processAllTriangles(btTriangleCallback* callback,const btVector3& aabbMin,const btVector3& aabbMax) const;
+
+	virtual void	calculateLocalInertia(btScalar mass,btVector3& inertia);
+
+	virtual void	setLocalScaling(const btVector3& scaling);
+	
+	virtual const btVector3& getLocalScaling() const;
+	
+	//debugging
+	virtual char*	getName()const {return "HEIGHTFIELD";}
+
+};
+
+#endif //HEIGHTFIELD_TERRAIN_SHAPE_H