Question: Input mesh does not have texture coordinates to support the texture

[Changwan-planet]

Hi, @banesullivan

Thank you for making this nice open-source!
I found the nice example for my work.
The example handled just a fence diagram, but in my case I have to deal with multiple fence diagrams, not connected with each other.

In the issue, I found two codes that you and your coworker made.

When I execute those programs, I keep having this message.

ValueError: Input mesh does not have texture coordinates to support the texture.

I tried to track what the problem was.

surface.plot(texture=texture, notebook=0, show_edges=True)

This part reported same error in both scripts.

My program environment
python : 3.9.16
pyvista : 0.39.1
vtk : 9.0.3

Please help me out to address this issue.

[banesullivan]

You'll need to create a texture mapping on the mesh. Perhaps the following examples will help you to generate these for your mesh:

• https://docs.pyvista.org/version/stable/examples/02-plot/texture.html#sphx-glr-examples-02-plot-texture-py
• https://docs.pyvista.org/version/stable/api/core/_autosummary/pyvista.DataSetFilters.texture_map_to_plane.html#pyvista.DataSetFilters.texture_map_to_plane
• https://docs.pyvista.org/version/stable/api/core/_autosummary/pyvista.DataSetFilters.texture_map_to_sphere.html#pyvista.DataSetFilters.texture_map_to_sphere
• https://docs.pyvista.org/version/stable/examples/02-plot/topo-map.html

[Changwan-planet]

Thank you for you r reply!

[AlexanderJuestel]

@banesullivan, found this discussion here xref to: cgre-aachen/gemgis#316

The tutorial is about plotting the image data of a geological profile onto a mesh as shown here: https://gemgis.readthedocs.io/en/latest/getting_started/tutorial/12_visualizing_cross_sections_in_pyvista.html

This seems to have stopped working and the error above mentioned by @Changwan-planet appears. Using mesh.texture_map_to_plane(use_bounds=False,inplace=True) will produce the following turned-around texture. Any idea how to solve that?

tex = pv.read_texture(file_path + 'profile1.png')

mesh.texture_map_to_plane(use_bounds=False,inplace=True)

p = pv.Plotter()
p.add_mesh(mesh)
p.add_mesh(mesh, texture=tex)


p.show_grid(color='black')
p.set_background(color='white')
p.show()```

[banesullivan]

@AlexanderJuestel, I'm not sure I follow the exact issue... do you see a difference in behavior across PyVista versions? If so, please open a new issue and try to nail down which version is causing the issues. Further, it would help us a lot if you could share a simple, reproducible example for us to debug

[banesullivan]

I see the issue of the texture being flipped, but I want to nail down whether something changed in PyVista that broke this

[AlexanderJuestel]

Sure, will further investigate that and open an issue then 👍