triangulate mesh

Is there a straightforward way to triangulate and quadrangulate meshes with grasshopper?

I want to emulate the command behavior from rhino. In particulate, pass a mesh to a triangulate mesh function and either triangulate or do nothing if already triangulated.

Replies to This Discussion

Permalink Reply by taz on December 14, 2010 at 2:39pm

Join the "[uto] tools Plug-ins" group and check out their mesh tools. Very useful!

Permalink Reply by Matthew Gilbride on December 14, 2010 at 3:28pm

Many Thanks. I have tried to install the MeshEdit.gha plugin but the drag and drop procedure fails with "I don't know what you want me to do". I have tried both Gh 8.0003 and 8.0004. I do not have a copy of revision 8.0001 to try it with. SCRATCH THAT. IT DID LOAD. I am trying it now.

Permalink Reply by Matthew Gilbride on December 14, 2010 at 3:54pm

Close but still not there. The triangulate function under analysis only functions on non planar meshes? Trying to go from an exploded mesh to triangle primitives to a re-welded mesh. Can't figure out how to use the triangle primitive?

Permalink Reply by taz on December 14, 2010 at 7:51pm

Does "exploded mesh" = "individual quad faces"?

It would be helpful to show what your trying to do with a few screengrabs.

Permalink Reply by Matthew Gilbride on December 14, 2010 at 8:42pm

Got It. Definition and screenshot enclosed. triangulates quad, triangular, and quad-triangular mixed meshes with stock GH components.

Attachments:

triangulate_mesh.ghx, 100 KB
def.jpg, 238 KB

Permalink Reply by taz on December 14, 2010 at 10:14pm

You were close... This should work for you.

You can ignore the warning messages because welding cleans up the mesh later.

Cheers,

taz

Permalink Reply by Matthew Gilbride on December 14, 2010 at 11:06pm

Thanks Taz,

Quick question...Is your change to produce a water tight mesh? While I am not producing a closed mesh the vertices all appear to be welded into one mesh in the def I posted.

Permalink Reply by taz on December 15, 2010 at 10:20am

Well it depends... Are you starting with a polygon mesh (mesh made of multiple meshes) and you want to maintain and triangulate each original mesh?

That can also be done with data tree type manipulation.

Permalink Reply by Matthew Gilbride on December 15, 2010 at 11:59am

Can you show me a simple example of what you are talking about with 2 or 3 simple meshes as example inputs?

Permalink Reply by Matthew Gilbride on December 22, 2010 at 11:27pm

taz,

a question going back to this definition. Are you able to mesh the resulting surface? Looking through other threads it seems that you would need to construct your own mesh coordinates? A little lost here.

matt

Permalink Reply by Matthew Gilbride on December 16, 2010 at 7:32am

Taz

Actually, got into data tree stuff a little further down the road. Think I understand what you were talking about. Thanks for your help.

Matt

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