Calculate if Mesh Faces are touching

Hi,

I'm was wondering if it's possible to use grasshopper to calculate if meshes faces are touching and then select those faces.

I've started out by exploding the mesh into it's component faces and am looking for some way to test if they share the same space but can't find any commands or techniques. Is there some way to do that?

Replies to This Discussion

Permalink Reply by Michael Pryor on June 25, 2013 at 1:11pm

check out the collision components. There are two of them.

Permalink Reply by Matt Stewart on June 25, 2013 at 4:14pm

This doesn't seem to work if the meshes are just right up against each other. They have to actually enter each other. Any way you can think of if they just touch?

Could always scale them by a minuscule amount I guess and then do the calculation, but it would be nice if there was a clean way.

Permalink Reply by Michael Pryor on June 25, 2013 at 7:08pm

get the edges and look for lines laying on top of eachother

Permalink Reply by Roberto Carrasco on May 4, 2015 at 12:33pm

Here there is a solution for this problem. The idea is to explode the faces and get the centers, then you can compare with the "(in)equality" command the position of the center of each face, and if they match you cull them. Once it is done it seems easy and works just fine.
The only posible problem is that I take only opposite faces for the comparison, to make it faster, and sometimes the order of the faces doesn't match with the example I propose. Then just organize again the faces and problem solved.

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