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"""Map an array which is defined on
the vertices of a mesh to its cells"""
from vedo import *
doc = Text2D(__doc__, pos="top-center")
mesh1 = Mesh(dataurl+'icosahedron.vtk').linewidth(0.1).flat()
# let the scalar be the z coordinate of the mesh vertices
msg1 = Text2D("Scalars originally defined on points..", pos="bottom-center")
mesh1.pointdata["myzscalars"] = mesh1.vertices[:, 2]
mesh1.cmap("jet", "myzscalars", on="points")
msg2 = Text2D("..are interpolated to cells.", pos="bottom-center")
mesh2 = mesh1.clone(deep=False).map_points_to_cells()
plt = Plotter(N=2, axes=11)
plt.at(0).show(mesh1, msg1, doc, viewup="z")
plt.at(1).show(mesh2, msg2)
plt.interactive().close()
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