Divide surfaces

Replies to This Discussion

Permalink Reply by David Rutten on January 31, 2014 at 2:51am

Moved from FAQ into discussion.

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David Rutten

david@mcneel.com

Permalink Reply by David Rutten on January 31, 2014 at 2:55am

It's do-able and fairly easy for patches with 4 corners, but patches with fewer or more corners need additional logic. Basically if there's more than 4 corners you need to decide which ones should be ignored and for patches with 3 corners you need to decide how to extend the surface and make it 4-cornered.

Do you have an algorithm written or drawn somewhere that unambiguously makes these decisions?

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David Rutten

david@mcneel.com

Permalink Reply by David Rutten on January 31, 2014 at 3:42am

I attached a file with a VB script which iteratively merges adjacent brep edges that have the lowest angle between them until only 4 edges are left. It then creates a nurbssurface from these 4 edges which can be divided.

It doesn't work on triangular patches, that requires a totally different approach.

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David Rutten

david@mcneel.com

Attachments:

• Patcher.gh, 6 KB

Permalink Reply by Pedram Mazaheri on January 31, 2014 at 9:43am

Wow, Very Tnx David for your reply.

First i'm sorry that i cant write English well. ;D

For answer your question , yes, i write definition in GH. Because i'm not pro in GH , my definition is too Long and Complex.

Attachments:

• Tarh5.gh, 85 KB
• Site Plan T5 P.3dm, 118 KB

Permalink Reply by to] on January 31, 2014 at 9:11am

reminds me of an intermediate step during a reserach project from 2009

Permalink Reply by Pedram Mazaheri on January 31, 2014 at 9:59am

Wow, this is awesome. how can i create form like this...??