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I would like to create a "root-like mesh system" using only the Python API of Blender as I can use it in different projects and generate a large number of meshes without opening Blender.

Before this Blender part, I have created a script that generates an undirected graph and store the ID of each node, it's coordinate, parents IDs and children IDs in a JSON file.

Given that data I would like to create a mesh of the graph.

I have different ideas about how to investigate such as:

  • Create vertex at each node and vertices between them, then add a cylinder mesh around it
  • Create splines following the graph pattern then add a cylinder mesh around it

I would like some advice about how to proceed and if you have any other ideas.

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  • $\begingroup$ Also skin modifier can be used for this. The disadvantage of skin modifier is that it has a remesh-like (or boolean-like) behavior in that it creates inconsistent animations with sudden changes to topology. The advantage is that it creates (sometimes buggy) smoothed connections on intersections. $\endgroup$ Commented Jun 6, 2023 at 9:26
  • $\begingroup$ Oh nice, I did not knew about this one. Thank you very much, the roots are empty inside, does it create holes within the root at each intersections ? $\endgroup$ Commented Jun 6, 2023 at 9:29
  • $\begingroup$ The skin modifier will not create internal faces i.imgur.com/LMGD52o.png $\endgroup$ Commented Jun 6, 2023 at 10:25
  • $\begingroup$ Nice ! Have you done this example using the Blender Python API ? $\endgroup$ Commented Jun 6, 2023 at 15:16
  • $\begingroup$ No, but adding a skin modifier in Python is trivial: C.object.modifiers.new('', 'SKIN') and in my case I also added a subdivision modifier C.object.modifiers.new('', 'SUBSURF').levels = 2 $\endgroup$ Commented Jun 6, 2023 at 20:04

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