Starting to implement GOAP plan

src/physics/physics.cpp

@@ -576,7 +576,10 @@ public:
         , object_vs_object_layer_filter{}
 		, debugDraw(false)
 	{
-		// Create a factory, this class is responsible for creating instances of classes based on their name or hash and is mainly used for deserialization of saved data.
+        static int instanceCount = 0;
+        OgreAssert(instanceCount == 0, "Bad initialisation");
+        instanceCount++;
+        // Create a factory, this class is responsible for creating instances of classes based on their name or hash and is mainly used for deserialization of saved data.
 		// It is not directly used in this example but still required.
 		JPH::Factory::sInstance = new JPH::Factory();