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

Bullet/CollisionShapes/ConcaveShape.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 CONCAVE_SHAPE_H
+#define CONCAVE_SHAPE_H
+
+#include "CollisionShapes/CollisionShape.h"
+#include "BroadphaseCollision/BroadphaseProxy.h" // for the types
+
+#include "TriangleCallback.h"
+
+
+///Concave shape proves an interface concave shapes that can produce triangles that overlapping a given AABB.
+///Static triangle mesh, infinite plane, height field/landscapes are example that implement this interface.
+class ConcaveShape : public CollisionShape
+{
+protected:
+	float m_collisionMargin;
+
+public:
+	ConcaveShape();
+
+	virtual ~ConcaveShape();
+
+	virtual void	ProcessAllTriangles(TriangleCallback* callback,const SimdVector3& aabbMin,const SimdVector3& aabbMax) const = 0;
+
+	virtual float GetMargin() const {
+		return m_collisionMargin;
+	}
+	virtual void SetMargin(float collisionMargin)
+	{
+		m_collisionMargin = collisionMargin;
+	}
+
+
+
+};
+
+#endif //CONCAVE_SHAPE_H