Hello everyone
Good morning. I want to make a 3D boundary-like sphere with two plane sections. I can easily make a sphere, but I cannot make it with two plane sections, as given in the following figure. Actually, I want to make force from c_1 and c_2 boundaries in a fracture phase field model. Since I am new to freefem++, please support me if possible. I hope I will find a solution. Thanks all, dear.
