hello.
I wish implement an mvc pattern in my application.
I see from google that there are two distinct approach :
1)a model and a view for each category of subjects
2)a model and a view for all category of subject
I have a little experience in symfony 2 in php and i see another division:
1)a controller that replies to the view ,takes data from model and next resend data to the view
2)a controller that replies to the view and the model send himself to the view with an observer pattern.

I'm creating the interface for a 3d opengl civil structural project and i wish choose a mvc model for my application.
i wish also know the difference that can break my design because i have no real experience in MVC.

thanks.