Grasshopper

algorithmic modeling for Rhino

offset on surface failure

A simple curve mounted on a simple surface, fails to offset if the offset distance is less than 0.1. Any clues or work around methods out there? This only happens with the offset curve on surface command. The simple curve offset command works fine under any distance. This is for the most recent built -8.

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Permalink Reply by David Rutten on June 24, 2011 at 5:20am

Hi anastasios,

 

I can repeat that but cannot find where the problem is. It must be deep in the Rhino SDK, because the _OffsetCrvOnSrf command also fails with distances smaller than 0.1.

 

It appears the cut-off point for offsetting is 10 times the Document Absolute tolerance. I have no idea why that is. I think I fixed the problem though by adjusting the tolerance for the offset based on the offset distance. Let's hope it works fine come the next release.

 

--

David Rutten

david@mcneel.com

Poprad, Slovakia

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