Voxel coloring

User Support
1

Hi,

I am making a voxel plot, and I’m trying to color the elements by their material.

When I produce the hdf file of the 3D-plot, I get a warning:

“WARNING: Color specifications ignored in voxel plot 2”

When I open the converted VTK file in ParaView, the colormap refers to cell id.

Is there a way to:

  1. Refer the colormap to material id instead?
  2. Export the colormap from OpenMC to the hdf file?

Thanks,
Shai

2

If you set:

p = openmc.Plot()
p.color_by = ‘material’
…

that will change it to color the plot by materials rather than cells.

Best,
Paul

3

Hi Paul,

Thanks for your reply.
The color_by function works fine in 2D plotting.
However, in 3D plotting this doesn’t seem to work.

Thanks,
Shai

4

Yes, it appears you’re correct. Unfortunately that means there’s nothing you can do to get the material IDs at present. However, I’ve just submitted a bugfix that will allow the color_by option to work for voxel plots, so that should be part of the next version.

Best,
Paul

1 Like
5

Thank you very much!