tetgen
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the input of pytetgen
Now I only have some point saved by a .ply file, and I want to use the pytetgen to generate the tetrahedra and visualize.Is it possible?
Now I only have some point saved by a .ply file
I'm assuming you have a surface. If so, I'd follow the steps in the README to load and tetrahedralize the surface. See the sphere example, but substitute your mesh for the sphere by first loading your mesh with pyvista.read
.
To be extra clear, try this:
import pyvista as pv
import tetgen
surface = pv.read('mysurface.ply')
tet = tetgen.TetGen(surface)
tet.tetrahedralize()
grid = tet.grid
grid.plot(show_edges=True)
grid.clip().plot(show_edges=True)
Once you tetrahedralize it, then you should head over to PyVista's documentation to learn how to do all the visualization: https://docs.pyvista.org/examples/index.html
Hi, is it possible for this interface to generates the Delaunay tetrahedralization from points only, instead of a surface?
With C++ tetgen this functionality is there (Figure 12 of http://wias-berlin.de/software/tetgen/1.5/doc/manual/manual005.html).
To be extra clear, try this:
import pyvista as pv import tetgen surface = pv.read('mysurface.ply') tet = tetgen.TetGen(surface) tet.tetrahedralize() grid = tet.grid grid.plot(show_edges=True) grid.clip().plot(show_edges=True)
Tried loading a ply file using this example with point coordinates only (no face record) but failed:
RuntimeError: Failed to tetrahedralize.
May need to repair surface by making it manifold
Hi, is it possible for this interface to generates the Delaunay tetrahedralization from points only, instead of a surface?
Nope, the input must be a manifold, triangular surface
Hi, is it possible for this interface to generates the Delaunay tetrahedralization from points only, instead of a surface?
With C++ tetgen this functionality is there (Figure 12 of http://wias-berlin.de/software/tetgen/1.5/doc/manual/manual005.html).
Thanks @banesullivan. For others looking for this, scipy.spatial.Delaunay supports Delaunay tessellation in N dimensions.