2d offset - controlled output

It seems that the offset component sometimes produces unpredictable results, so I decided to create a workaround.
The definition is far from perfect (no kinks allowed yet, for example) but produces a fast and accurate result for many curves. In addition it will produce multiple resulting offset curves in cases like this:

You can't achieve this result with the standard offset component nor the offset command in Rhino.

Made with GH 0.7.0052

Attachments:

2d_offset_controlled.ghx, 460 KB

Replies to This Discussion

Permalink Reply by Benjamin Golder on September 10, 2010 at 9:54pm

Thanks!

Permalink Reply by kleerkoat on September 12, 2010 at 11:00am

beautiful! thank you so much for sharing!

Permalink Reply by Tomasz Gancarczyk on September 12, 2010 at 12:25pm

ładnie!

Permalink Reply by qwesxqe on October 1, 2010 at 12:56am

very good

Permalink Reply by ibrahim çağrı uslu on November 19, 2010 at 8:45am

nice and effective. thank you for sharing.

Permalink Reply by David Wood on November 23, 2010 at 11:26am

Great!

Thanks for sharing.

Permalink Reply by Arie-Willem de Jongh on December 19, 2011 at 11:30am

Dude, your definition is really clever! The part where you check the intersection of every curve but not itself is really usefull. I figured it out to, but not as elegant and effective as this! Thanks for sharing and keep up the great work! Cheers!

Permalink Reply by Yasser Hafizs on February 27, 2012 at 11:29am

awesome.. thanks!!

Permalink Reply by Morten Ydefeldt on January 21, 2016 at 7:52am

Is it possible to feed it a series instead of just a single number? (Not as it is right now I can tell) but how would that be possible? I need to 'fill' a shape with offsets like this is order to make a 'pocket' for a CAM definition..

Permalink Reply by Morten Ydefeldt on January 21, 2016 at 3:11pm

I have modified this definition a bit.. It also supports multiple curves.

Attachments:

new.png, 199 KB
Screenshot 2016-01-21 23.06.31.png, 27 KB
offsetMultiple.gh, 10 KB

Permalink Reply by kwanphil cho on March 3, 2016 at 4:49am

Hi. Morten. Your definition is really interesting. It has been a while that I am trying to achieve something similar. Could you please explain your definition a bit? Thanks in advance.

Permalink Reply by Nik Willmore on March 6, 2016 at 12:32am

If you turn on preview for some of his intermediate components, you see wild curve overshoot overlaps that I guess are then manually split and junk is culled. Both Grasshopper and lesser so Rhino are terrible at offsets. They don't have good robust *algorithms* made to just work. Edge concavities for instance, such a simple thing, can blow up offset, returning fragments or the wrong object, like just the hole instead of deleting the resulting hole and giving the desired overall object offset. Here I've removed the negative number modifier to give an outside offset: