several noob questions

If I make a group of surfaces from a group of points is there a way that I can call on just one surface in particular?
Is there a way to simulate the Rhino tool "contour lines" using GH? And if you can, is there a way to control where the contour lines exist on the surface and their relative distance?
Is there a way to have a group of rail curves and a group of section curves to go into one sweep function?

Tags: contour, difference, inherited, line, lines, organization, solid, surfaces, sweeps

Attachments:

CMA_lost_BT.3dm, 72 KB
CMA-BT.ghx, 257 KB

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Permalink Reply by Brey Tucker on December 2, 2009 at 11:33am

Ok a little less lost on the solid difference operation but I could still use some help automating the contour lines on a surface with control on the plane the contour lines start on in GH. THanks!

Attachments:

CMA_less lost.3dm, 541 KB
CMA-BT-redifined.ghx, 110 KB

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Permalink Reply by Brey Tucker on December 3, 2009 at 8:54am

Ok, I tried to simplify my post here to make it a little simpler to answer. Sorry for having a confusing post prior. Thanks in advance.

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Permalink Reply by Manuel on December 3, 2009 at 6:28pm

I didnt open your files (sorry i like images) but anyways here we go..

1. You can use the list item with a index number to call the surface that you want.

2. You can use a intersection between you geometry and a plane... in grasshopper you can control the repetitions, position, orientation, etc..

Taz made a nice grillage definition but its a little advance to understand it for a beginner user:
http://www.grasshopper3d.com/forum/topics/grillage-fabrication-1

3. Yes, grasshopper use something like a tree data structure with paths, branchs, etc... more information in the grasshopper primer, pag. 36: http://www.liftarchitects.com/journal/2009/3/25/the-grasshopper-pri...

If you have your rails and curves in a flat list, you can use the graft component on the two list to separate the curves in different patch-branchs and then use the sweep component.

There is a param viewer component to see the data structure (so you can check the paths-branchs).