Grasshopper

algorithmic modeling for Rhino

Offset not working well

Hello guys.

I have a Srf on which  I've created a Hex pattern using LAN component. Now I want to offset the curves inwards accordingly to the normal of the Srf. but it looks as is the curves are not closed polylines. I've verified and each of the original cells are closed polylines.  Any suggestions
Thanks

cheers








Views: 294

Replies to This Discussion

Permalink Reply by Evert Amador on August 29, 2010 at 3:16am
Hi Claudio,

This will always happens when offsetting non-planar polylines. I would suggest you find the centroid of every cell and scale the closed polylines with a factor based on a function between the apothema of the hexagon and the required offset distance.

Cheers

Evert
Permalink Reply by Jacek Jaskólski on August 29, 2010 at 11:25am
Hi guys,

This is a good idea. Since you're probably dealing with distorted hexagons you'll need to compute an average of the six diffrent "apothemata" (distance from centroid to each segment)

You could also try a "3d offset" - see this post

Best,

JJ
Permalink Reply by Claudio on August 30, 2010 at 10:02am
Great guys. I'll try it and see what comes out of it

thank you all
Permalink Reply by Robert Beach on August 30, 2010 at 11:09am
Maybe try copying in the direction of the normal and lofting them?

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