Grasshopper

algorithmic modeling for Rhino

Clean an inward offset

I am struggling to clean an inward offset.

Unfortunately, my starting curves have filets which produce self-crossing curves after the inward offset.

I used Systemiq's trick with the MCX component to trim the curves , but now it's a pain to remove the unwanted segments and get a clean closed curve.

Is there a better / more simple way to do a clean offset ?

Cheers,

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Permalink Reply by ng5 Alex on July 15, 2016 at 7:23am

Hello Olivier,

in case you are open to plugins use,this is a great plugin, working with polylines.

the following is the offset result of a referenced interpolated curve. It outputs both offsets to work with.

best

alex

Permalink Reply by ng5 Alex on July 15, 2016 at 7:30am

Permalink Reply by Olivier Suire on July 15, 2016 at 7:58am

Thank you so much Alex, this will save me alot of headaches !

I can't figure out why Rhino doesn't produce a clean result like this already.

In case there is someone somewhere who still likes the crappy offsets, then there could be an extra Rhino command called "Clean Offset" ...

Cheers,

Permalink Reply by ng5 Alex on July 15, 2016 at 8:19am

you re welcome.

here is the library this plugin uses. in case you want to fiddle further.

best

alex

Permalink Reply by Olivier Suire on July 15, 2016 at 7:39am

SolidWorks, on the other hand, produces clean offsets directly. 

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