Creating Windows on a non-planar surface


In the attached file I have a profile of a window I am trying to create in a surface. The “frame” is the projection of a planar window shape on the surface.

My thought was to create the window opening by using the shape to create a surface, extrude the surface, then subtract the extrusion (offsetsrf).

Problem Windows.3dm (3.0 MB)

The problem that when i try to use edgesrf or notworksrf then offsetsrf, I get a weird shape (note surfaces at the side)

It does work if I use Patch but patch is very slow.

I am not wondering if I am approaching this in the wrong way and, if so, how to go about doing this.

(David Cockey) #2

Create a “rectangular” window with sharp corners on the surface, then trim the corners.

(Pascal Golay) #3

Hard to say without the surface, but Split on the surface with the window curves seems like it might be what you want.


(Brian James) #4

The curve is so close to planar that I have to ask… why not just use SetPt to flatten it and then PlanarSrf?


There is a large number of these windows that vary in shape. I must not have picked one that is far from planar—but many are.