I am currently trying to split/trim a surface that I created with a patch - it’s a terrain resulting from a group of contour curves.
I frist tried to split the surface with a rectangle from the top view. Secondly, I tried with four longer lines that resulted from the extension of the rect’s edges, but just one of them managed to cut the surface. I also used the vertical extrusions of those lines as splitting objects, but no success again.
Could someone have a look and give me a feedback on this issue?
//if you wanna have a look at the file, you can find it here - Split not working.3dm - Google Drive