refactoring of TriangleMeshShape, introduced ConcaveShape, which allows for StaticPlaneShape and future landscape/heightfield shape

Bullet/CollisionShapes/StaticPlaneShape.h

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+/*
+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 STATIC_PLANE_SHAPE_H
+#define STATIC_PLANE_SHAPE_H
+
+#include "CollisionShapes/ConcaveShape.h"
+
+
+///StaticPlaneShape simulates an 'infinite' plane by dynamically reporting triangles approximated by intersection of the plane with the AABB.
+///Assumed is that the other objects is not also infinite, so a reasonable sized AABB.
+class StaticPlaneShape : public ConcaveShape
+{
+protected:
+	SimdVector3	m_localAabbMin;
+	SimdVector3	m_localAabbMax;
+	
+	SimdVector3	m_planeNormal;
+	SimdVector3	m_localScaling;
+	SimdScalar m_planeConstant;
+
+public:
+	StaticPlaneShape(const SimdVector3& planeNormal,SimdScalar planeConstant);
+
+	virtual ~StaticPlaneShape();
+
+
+	virtual int	GetShapeType() const
+	{
+		return STATIC_PLANE_PROXYTYPE;
+	}
+
+	virtual void GetAabb(const SimdTransform& t,SimdVector3& aabbMin,SimdVector3& aabbMax) const;
+
+	virtual void	ProcessAllTriangles(TriangleCallback* callback,const SimdVector3& aabbMin,const SimdVector3& aabbMax) const;
+
+	virtual void	CalculateLocalInertia(SimdScalar mass,SimdVector3& inertia);
+
+	virtual void	setLocalScaling(const SimdVector3& scaling);
+	virtual const SimdVector3& getLocalScaling() const;
+	
+
+	//debugging
+	virtual char*	GetName()const {return "STATICPLANE";}
+
+
+};
+
+#endif //STATIC_PLANE_SHAPE_H