Problems on lofted surface, "Error from brep to surface"

Hi,

I'm trying to lay a diagrid onto a lofted surface. I set up the definitions and it works on a smooth surface successfully. However, when I plug that into a lofted surface, it comes to an error, saying "data conversion failed from brep to surface".

I've read some posts on same issue, and it's said that happens as the lofted surface does not have continuous curvature and it is splitted up into different components in grasshopper. I have tried to recreate the surface through sweep2, but the same issue came up. And I can't find other ways to create the surface. Did anyone have the same issue? And is there any possible way to solve it?

Thank you so much in advance!!

Attachments:

Replies to This Discussion

Permalink Reply by Hannes Löschke on February 24, 2014 at 3:13pm

a loft doesn't necessarily return a single NURBS surface. Sometimes there are kinks in the lofted curves or other problematic features of your curves setup. Rhino/GH decides to create multiple sublofts and then join them.

A joined collection of surfaces is called a BRep. You cannot use a BRep for surface inputs. You can explode the BRep. Then the surface operation is executed on every subsurface separately. Either you can live with that or you need to find another way to create the loft. Often switching the build direction and using sweeps can help.

RSS