incorrect color to display vtu file

[zhang-qiang-github]

I have a vtu file, and vedo show it as:

In this figure, the red color indicate lower value than blue color, which is non-instinctive. Is it possible to make red color indicate the higher value?

The test data is:

flow.zip

[zhang-qiang-github]

In addition, when I set the color map to rainbow, the colorbar is weird.

mesh = Mesh('flow.vtu').add_scalarbar('pressure').cmap('rainbow')

show(mesh)

The result is:

The colorbar is not continuous. Why?

[marcomusy]

that's because you added the scalar bar before the cmap call (so you are actually building the scalarbar for some other vector data), try instead:

from vedo import * 
tmsh = TetMesh("flow.vtu")
msh = tmsh.tomesh(fill=False)
msh.cmap("rainbow", "Pressure").add_scalarbar()
show(msh, axes=1)

you can invert any colormap name by adding _r, e.g. "rainbow_r"