Creating line thickness in grasshopper: roads, walls, etc. - help please!

Hi! I am trying to take a number of intersecting curves, generating in rhino, and create outlines of the shape that would be created if those lines had a thickness. See first jpeg, that should explain it.

This seems to have a number of applications, ie you can draw many single lines that represent walls, roads, or paths and give them widths without offsetting and trimming a hundred times in rhino/acad.

My initial method was to offset the curve in two directions, loft them, and somehow join/boolean those surfaces so I can take only the outline (brep edge).

I can't find a way to join the surfaces (coplanar, overlapping faces) so it becomes one single surface, any ideas? Or maybe there is a better way to do this? Thanks!

Attachments:

ThickLines_q1.jpg, 143 KB
Gh1.jpg, 145 KB

Replies to This Discussion

Permalink Reply by Chris Tietjen on December 15, 2011 at 9:37pm

Chris

Attachments:

CenterlineWalls.gh, 4 KB

Permalink Reply by MMiller on December 15, 2011 at 9:56pm

Join, Region union the curves, perfect! thanks a lot.

Permalink Reply by Fajer Wennerberg on January 16, 2012 at 2:25am

Please upload the CentterlineWalls.gh again, I get a error message when opening.

Permalink Reply by Chris Tietjen on January 16, 2012 at 5:41am

What kind of error message?

Attachments:

CenterlineWalls.gh, 4 KB

Permalink Reply by djordje on August 15, 2012 at 3:48pm

Thank you for the solution Chris.

Brilliant yet simple, as always!

Permalink Reply by JorgeAndres on April 14, 2016 at 4:36pm

You can use less commands!

Permalink Reply by Roman on March 10, 2018 at 12:31pm

How to make it work with Roundabouts and add corner radiuses like roads?

Cheers

Permalink Reply by Philipp on January 16, 2012 at 4:15am

Btw is there any possibility to customise line thikness (stroke) for layer/object ?

Permalink Reply by David Rutten on January 16, 2012 at 8:41am

It is possible to draw lines and curves using custom thickness (thickness measured in screen pixels, not document units) but Grasshopper does not use this anywhere yet.

David Rutten

david@mcneel.com

Poprad, Slovakia

Permalink Reply by Marc Syp on January 16, 2012 at 11:30am

That would be nice to see in GH...

Permalink Reply by Adam Laskowitz on August 15, 2012 at 2:42pm

+1 for this. Please?

Permalink Reply by Kristoffer Negendahl on November 19, 2012 at 3:08am

More control of line geometry is a very welcome feature. Could this be a way to create custom "drawing styles" with GH!? If so, it's even more interesting.

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