To identify the different rigid bodies we are going to be adding to the scene, we will add a property to the MeshRenderer class that will specify each object being rendered. Let's look at how to do this:

1. In the MeshRenderer.h class, which can be found within the MeshRenderer class, change the constructor of the class to take in a string as the name for the object, as follows:

MeshRenderer(MeshType modelType, std::string _name, Camera *  
   _camera, btRigidBody* _rigidBody) 

2. Add a new public property called name of the std::string type and initialize it, as follows:

         std::string name = ""; 

3. Next, in the MeshRenderer.cpp file, modify the constructor implementation, as follows:

MeshRenderer::MeshRenderer(MeshType modelType, std::string _name,  
   Camera* _camera, btRigidBody* _rigidBody){ 
    
   name = _name; 
... 
... 
 
}