Curve - Start, End, Radius, Plane

Replies to This Discussion

Permalink Reply by brancoates on October 20, 2011 at 10:51am

Another helpful solution would be to find the tangent vector at a specified "point" along a curve, rather than at a point defined by the distance from start of curve.

Permalink Reply by Michael Pryor on October 20, 2011 at 11:42am

Try this I just put it together hope it can help. Just download the .ghuser file and drop it on your GH canvas, it will instal in curve, primitive as "arc SERP." the expression I have in A is rad(a) to make it read degrees.

Attachments:

• Arc SERP.ghuser, 15 KB

Permalink Reply by brancoates on October 20, 2011 at 11:53am

Thank you so much for helping!  When i try to drop the ArcSERP file into gH canvas i get this meesage...

Permalink Reply by Michael Pryor on October 20, 2011 at 12:03pm

you need the newest grasshopper, are you updated? http://www.grasshopper3d.com/page/next-build

Permalink Reply by Michael Pryor on October 20, 2011 at 12:19pm

also you can go to file, special folders, user object. and copy it into that folder.

Permalink Reply by Michael Pryor on October 20, 2011 at 12:39pm

my approach is a tad off anyway, Ill fix it later.

Permalink Reply by Pieter Segeren on October 22, 2011 at 3:32pm

Hi brancoates,
since the chord from StartPt to EndPt already determins one direction of the plane the arc will be in, I thought it would be smarter to use a third point to create the plane for the arc.
The UserObject I made (in GH 08.00052) will appear in the user > curve tab. (the A output is the resulting Arc, the m shows a message if something went wrong). Can you test it for me, and maybe give me some feedback? Hope this helps.

Attachments:

• Arc SEPR.ghuser, 18 KB

Permalink Reply by Michael Pryor on October 22, 2011 at 3:51pm

thanks Pieter