Added Quake BSP loading to the ColladaDemo example. This can become utility to transform bsp2dae

Demos/ColladaDemo/BspConverter.h

@@ -0,0 +1,40 @@
+/*
+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 BSP_CONVERTER_H
+#define BSP_CONVERTER_H
+
+class BspLoader;
+#include <vector>
+#include "SimdVector3.h"
+
+///BspConverter turns a loaded bsp level into convex parts (vertices)
+class BspConverter
+{
+	public:
+
+		void convertBsp(BspLoader& bspLoader,float scaling);
+
+		///Utility function to create vertices from a Quake Brush. Brute force but it works. 
+		///Bit overkill to use QHull package
+		void	getVerticesFromPlaneEquations(const std::vector<SimdVector3>& planeEquations , std::vector<SimdVector3>& verticesOut );
+		bool	isInside(const std::vector<SimdVector3>& planeEquations, const SimdVector3& point, float	margin);
+
+		///this callback is called for each brush that succesfully converted into vertices
+		virtual void	AddConvexVerticesCollider(std::vector<SimdVector3>& vertices, bool isEntity, const SimdVector3& entityTargetLocation) = 0;
+
+};
+
+#endif //BSP_CONVERTER_H