Offset crv issue - strangeness in offsetting a curve

Grasshopper
1

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

description
description1223×817 211 KB
offset_crv_issue.gh (13.4 KB)

2

Hi @nom,

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

– Dale

3

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.

4

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

Canvas at 02;49;08
Canvas at 02;49;081164×346 67.8 KB

5

Bug, replicable:

2021-04-05 19_52_31-Grasshopper - offset bug
2021-04-05 19_52_31-Grasshopper - offset bug855×607 80.5 KB

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.

6

Hi @nom,

Thanks - I’ve logged the issue.

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

– Dale