How to construct tetrahedron using vessel surface?

[zhang-qiang-github]

Please have a look at following picture:

If I have a 3D vessel surface (the black), how to construct the inside tetrahedron just like the red color.

[marcomusy]

There are many tools to create a tetmesh (eg TetGen), vedo can also do it:

from vedo import Tube, Sphere, show

surf = Sphere(quads=True, res=15)
# surf = Tube([(0,0,0), (1,1,1), (2,3,4)], res=15)

tmesh = surf.tetralize(side=0.025, debug=True)
#tmesh.write('mytetmesh.vtk')  # save to disk!

show(tmesh.tomesh().alpha(1), axes=1)

check also https://github.com/marcomusy/vedo/blob/master/examples/volumetric/tetralize_surface.py

[zhang-qiang-github]

Thank you very much ~~~

[zhang-qiang-github]

For tmesh.tomesh(), how to set alpha=0 for face, but alpha=1 for all lines? In this way, I want to see only the line.

[marcomusy]

use .wireframe() instead.

[zhang-qiang-github]

thx~~~