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- """Controlling the color and transparency
- of a Mesh with various color map definitions"""
- from vedo import Mesh, dataurl, printc, show
- import numpy as np
- man = Mesh(dataurl + "man.vtk")
- # let the scalar be the z coordinate of the mesh vertices
- scals = man.vertices[:, 2]
- # assign color map with specified opacities
- try:
- import colorcet
- # https://colorcet.holoviz.org
- mycmap = colorcet.bmy
- alphas = np.linspace(0.8, 0.2, num=len(mycmap))
- except ModuleNotFoundError:
- printc("colorcet is not available, use custom cmap", c='y')
- printc("pip install colorcet", c='y')
- mycmap = ["darkblue", "magenta", (1, 1, 0)]
- alphas = [0.8, 0.6, 0.2]
- man.cmap(mycmap, scals, alpha=alphas).add_scalarbar()
- show(man, __doc__, viewup="z", axes=7).close()
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