Offset error: “Offset plane must be provided if the curve is not planar”

Rhino
, ,
1

Hi,

I’m working in Grasshopper and trying to offset curves generated from a TriGrid + PLine workflow.

I’m getting the following error:

“Offset plane must be provided if the curve is not planar itself”

From my understanding, this means the curves are not planar, but I’m not sure why this is happening since the pattern is supposed to be 2D.

What I tried:

  • Connected an XY Plane to the P input of the Offset component

  • Still getting issues / unexpected behavior

My workflow:

  • Input curve → TriGrid

  • TriGrid output → vertices → PLine

  • PLine → Offset

What I want:

I want to offset these pattern curves to generate thickness for fabrication.

Questions:

Pa For Aysha.gh (4.4 KB)

  1. Are my curves actually non-planar?

  2. Should I project them before offsetting?

  3. Is Offset the wrong component for this workflow?

I’ve attached:

  • Screenshot of the definition

  • (.gh file if allowed)

Any guidance would be appreciated.

2

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