add initial examples, replacing the 'Demos/Demos3'. Will make it work cross-platform, OpenGL3/OpenGL2 and add more examples to it.

examples/CommonInterfaces/ExampleInterface.h

@@ -0,0 +1,28 @@
+#ifndef EXAMPLE_INTERFACE_H
+#define EXAMPLE_INTERFACE_H
+
+
+class ExampleInterface
+{
+public:
+
+	typedef class ExampleInterface* (CreateFunc)(struct PhysicsInterface* pint, struct GUIHelperInterface* helper, int option);
+
+	virtual ~ExampleInterface()
+	{
+	}
+
+	virtual void    initPhysics()=0;
+	virtual void    exitPhysics()=0;
+	virtual void	stepSimulation(float deltaTime)=0;
+	virtual void	renderScene()=0;
+	virtual void	physicsDebugDraw(int debugFlags)=0;//for now we reuse the flags in Bullet/src/LinearMath/btIDebugDraw.h
+	virtual bool	mouseMoveCallback(float x,float y)=0;
+	virtual bool	mouseButtonCallback(int button, int state, float x, float y)=0;
+	virtual bool	keyboardCallback(int key, int state)=0;
+
+};
+
+
+
+#endif //EXAMPLE_INTERFACE_H