texture caching and geometry caching (PhysX) for much faster loading of many same objects, helps benchmarking/comparison.

add command-line args for PhysX (numCores=..., solver=tgs, )

examples/SharedMemory/PhysicsServerExample.cpp

@@ -658,6 +658,7 @@ public:
 	}
 	GUIHelperInterface* m_childGuiHelper;
 
+	btHashMap<btHashPtr, int> m_cachedTextureIds;
 	int m_uidGenerator;
 	const unsigned char* m_texels;
 	int m_textureWidth;
@@ -856,6 +857,11 @@ public:
 
 	virtual int registerTexture(const unsigned char* texels, int width, int height)
 	{
+		int* cachedTexture = m_cachedTextureIds[texels];
+		if (cachedTexture)
+		{
+			return *cachedTexture;
+		}
 		m_texels = texels;
 		m_textureWidth = width;
 		m_textureHeight = height;
@@ -864,7 +870,7 @@ public:
 		m_cs->setSharedParam(1, eGUIHelperRegisterTexture);
 
 		workerThreadWait();
-
+		m_cachedTextureIds.insert(texels, m_textureId);
 		return m_textureId;
 	}
 	virtual int registerGraphicsShape(const float* vertices, int numvertices, const int* indices, int numIndices, int primitiveType, int textureId)
@@ -918,6 +924,7 @@ public:
 
 	virtual void removeAllGraphicsInstances()
 	{
+		m_cachedTextureIds.clear();
 		m_cs->lock();
 		m_cs->setSharedParam(1, eGUIHelperRemoveAllGraphicsInstances);
 		workerThreadWait();