Grasshopper offset curve, some curves fail

[cncduck (Derek)]

When offsetting a series of closed polylines it seems that a select number of them knot up. I tried to rebuild the curves but that didnt do anything. Is there a way to mitigate this problem ?

Thanks!`

[laurent_delrieu]

Welcome to the club

We need to talk about Offset

Dear Rhino/Grasshopper developers thanks for Rhino 6, many useful improvements, render, Rhinocommon functions … but there is an old subject Polyline Offset see this thread : Are there some news about Polyline offset ? I know Clipper is a good solution for Grasshopper and Rhino. Update : @pascal it is not a Grasshopper question more a Rhino core function. There is a reliability problem with offset Polyline. It doesn’t work on some the cells which are simple polygon (see the picture). The sa…

But last Rhino WIP is said to be better.

[cncduck (Derek)]

Ok good to know it has been brought up before.

Thanks !