Mesh aspect ratio not used when meshing on extrusion

menno · August 22, 2013, 6:49am

When I try to create a mesh on an extrusion, the required aspect ratio is not used. This leads to an undesired mesh with mesh faces of high aspect ratio.

Mesh on extrusion (Cylinder 0 10 10)

Mesh on surface created from extrusion

John_Brock · August 22, 2013, 4:04pm

Actually, it’s not a bug. It is intentional behavior. I can’t currently recall why it was special cased to act that way, but it was to fix or avoid some other problem.

Is it important enough for you that I go find out so you understand why?
I’m pretty sure the unique behavior will not be changed.

menno · August 22, 2013, 4:19pm

If it is not a bug, but a feature then maybe could you tell me how to convert an extrusion to a surface? I really had to struggle by first trimming the extrusion, which turns it into a surface, followed by untrimming the trim to get the surface of the extrusion.

pascal · August 22, 2013, 4:23pm

Hi Menno- use ConvertExtrusion (or Explode/Join) to convert extrusion to polysurfaces. Also, if you do not want Rhino to create extrusions, set this with the UseExtrusions command.

-Pascal

menno · August 22, 2013, 4:33pm

@pascal thanks for the name of the command, that is really helpful.

brian · September 19, 2013, 4:18am

@dalelear, is this difficult to fix? @bobmcneel, is this a “paper cut”?

bobmcneel · September 19, 2013, 8:39pm

Yes. This is a paper cut.

I already reported this.
http://mcneel.myjetbrains.com/youtrack/issue/RH-19619

Watch the training video link to see how we screw up the user/salesperson.

wim · September 20, 2013, 5:05am

I guess we had to be there…
[don’t you guys eat lunch around the same table? :∙]