Trouble Weaving Data to Create Mesh

I am learning data trees in grasshopper. Normally I would construct this simple mesh by the way shown at the top of the definition: taking individual points and manually sorting them to construct 8 individual meshes. But I want to do this from a rectangle and weave the point data together to construct the mesh all at once. But I can't get it to make more than one section in the rectangle definition.

Any Advice? How would you construct this mesh or surface in gh?

Attachments:

Weave-mesh.gh, 21 KB
mesh.jpg, 80 KB

Replies to This Discussion

Permalink Reply by David Stasiuk on August 6, 2014 at 2:37am

Here's a solution...in this case probably the best way to construct a new mesh is to get the vertex indices set up correctly, which uses a count of the exterior vertices to generate them...it really doesn't have to have anything to do with data trees for this example, more just with basic list management.

If you were to use data trees, then you have do a few different moves to ensure that you have the right vertices in each branch (like repeating your center vertex). You'll also end up constructing multiple meshes which you'll then have to join and weld:

Attachments:

WeavemeshTree.gh, 12 KB
WeavemeshList.gh, 10 KB

Permalink Reply by Wesley Moore on August 6, 2014 at 11:29am

Wow, thank you so much David. I didn't realize what was possible with the triangle mesh tool, that's nice that it repeats the sequence without needing the repeat tool you used on the tree version. Thank you for doing the tree version too, it really helped me with my main goal here: to learn how to weave data in the way you did with the merge, repeat, and shift tools.

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