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A polygon uses the same vertex twice error in animation nodes

Blender Asked by Richard Bruno on September 29, 2021

I am trying to recreate the animation nodes example from the online documentation that is here.
https://animation-nodes-manual.readthedocs.io/en/latest/user_guide/nodes/mesh/operators/create_polygon_indices.html

I get an error at the combine mesh node (Which used to be the Combine Mesh Data Node) "A polygon uses the same Vertex twice"

I have tried fix it but couldn’t. I would like to know why. Thanks. I am using animation nodes 2.1.7
and Blender 2.83.1

I have attached the Blend file.

2 Answers

In the documentation it shows earlier version of animation nodes which didn’t require you to add the edges to create a mesh. In v2.1, if you want to remove any errors make sure you add the vertices then edge indices then polygon. I don’t think you need a maths node, you just need to connect your edge indices from the original mesh info straight to your Combine Mesh Node and everything should work.

Answered by Ebube Onyema on September 29, 2021

I fixed it by connecting the math add node to index instead of iterations and added the edges of polygons node.

enter image description here

Answered by Richard Bruno on September 29, 2021

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