From: Hang Nguyen Tuan on
descg(shape, sf, ns)
with shape is a csg matrix having 2 column: 2 objects of domain.
ns=[80 80; 49 50]: P1,P2
What is sf if I want set formula is P1-P2?
Is it ' - ' ? I tried but unsuccesful.
Thanks a lot for your consideration and answer.

From: Hang Nguyen Tuan on
Help me, please.
From: Walter Roberson on
Hang Nguyen Tuan wrote:
> Help me, please.

I don't have any idea what you are talking about. I would have to research
what a csg matrix is and what decsg is supposed to do, and experiment, and so
on. Since you already have a clue about what you are trying to do, you should
be able to solve this much faster than I could.