Offset crv issue - strangeness in offsetting a curve

Hello Everyone,

I often have a problem with offset of curves. I made a small sample where the problem is shown. The crv offset is unpredictable. Why are some values indented correctly and some not? Can someone please tell me where I am making a mistake? Please help, thanks a lot

offset_crv_issue.gh (13.4 KB)

Hi @nom,

What if you just use Grasshopper’s Offset Curve component, instead of your cluster?

– Dale

I’m sorry (it’s not my cluster), I tried more ways to offset and forgot to return the standard gh component to the sample. I have the same problem with the native gh offset_crv_issue_v_02.gh (8.8 KB) component.

Have no idea why the error occur at 23.28, anyway in this case, you could use Offset Curve Loose.

Bug, replicable:


offset bug.gh (15.4 KB)

Nom, you can consider use “Offset curve loose” which just move the control points of your curve, but is a good solution if you work with polylines.
… but, due to another old bug, you’ll need to explode and join the polygon before that.

Hi @nom,

Thanks - I’ve logged the issue.

https://mcneel.myjetbrains.com/youtrack/issue/RH-63654

– Dale