Sun

Hi everybody,

I'm trying to create a roof which can evolve with the sun.

So step 1 : I create starting point of th sun an of the roof.

Step 2 : I draw the sun lines and the roof

Step 3 : I find the intersection between sun and roof

Step 4 : (Where I'm block) The sun lines are stop if they touch the roof.

I attached the ghfiles, I tried to use the cull but I didn't sucess.

If someone have an idea to solve that, he is welcome. 

Thanks!