AttributeError with mesh isobands

Hi there!

I’m getting this error when I try to use the isobands() mesh method:

<vedo.plotter.Plotter object at 0x7f6a45f44590>
Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/home/jonathancorcutt/anaconda3/envs/wellplan/lib/python3.7/site-packages/vedo/mesh.py", line 1814, in isobands
    bcf.GetOutput().GetCellData().GetScalars().SetName("IsoBands")
AttributeError: 'NoneType' object has no attribute 'SetName'

I’m loading in a (n, 3) array of vertices and creating a (flat surface) mesh with:

mesh = vedo.delaunay2D(vertices)

There’s 233,358 vertices and when plotted with:

vedo.show(mesh)

They look like this:

But I’d like to shade this surface like this:

It’d also be nice to make the surface a bit smoother.

Any suggeestions? 😃

Jonny

[jonnymaserati]

Great, thank you!

I keep learning more and more stuff I can do with this excellent library!

[marcomusy]

just realized i forgot to answer this

It’s not documented in the examples how to assign the scalar since the imported shape already has that data assigned.

you can assign any number of arrays to points or cells of a mesh with mymesh.addPointArray(arr, "arrname") and/or mymesh.addCellArray(arr, "arrname")

Also mymesh.cmap("jet", arr, on="points", arrayName="arrname") will automatically add it when setting the colormap.