tetgen python wrapper for points, PLCs and tetmesh inputs

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License: GNU Affero General Public License v3

Author: Jaewook Lee

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Project description

tetgenpy

main PyPI version

tetgenpy is a python wrapper for Hang Si's TetGen - A Quality Tetrahedral Mesh Generator and a 3D Delaunay Triangulator. It helps to prepare various types of inputs - points, piecewise linear complexes (PLCs), and tetmesh - for tetrahedron mesh generation based on simple python types, such as list and numpy.ndarray.

Install

pip install tetgenpy

For current development version,

pip install git+https://github.com/tataratat/tetgenpy.git@main

Quick Start

Following is an example for tetrahedralization of a unit cube defined as PLCs. Alternatively, you could also use tetgenpy.PLC class to prepare TetgenIO.

import tetgenpy
import numpy as np

# tetrahedralize unit cube
# define points
points=[
    [0.0, 0.0, 0.0],
    [1.0, 0.0, 0.0],
    [0.0, 1.0, 0.0],
    [1.0, 1.0, 0.0],
    [0.0, 0.0, 1.0],
    [1.0, 0.0, 1.0],
    [0.0, 1.0, 1.0],
    [1.0, 1.0, 1.0],
]

# define facets - it can be list of polygons.
# here, they are hexa faces
facets = [
    [1, 0, 2, 3],
    [0, 1, 5, 4],
    [2, 0, 4, 6],
    [1, 3, 7, 5],
    [3, 2, 6, 7],
    [4, 5, 7, 6],
]

# prepare TetgenIO - input for tetgen
tetgen_in = tetgenpy.TetgenIO()

# set points, facets, and facet_markers.
# facet_markers can be useful for setting boundary conditions
tetgen_in.setup_plc(
    points=points,
    facets=facets,
    facet_markers=[[i] for i in range(1, len(facets) + 1)],
)

# tetgen's tetraheralize function with switches
tetgen_out = tetgenpy.tetrahedralize("qa.05", tetgen_in)

# unpack output
print(tetgen_out.points())
print(tetgen_out.tetrahedra())
print(tetgen_out.trifaces())
print(tetgen_out.trifacemarkers())

This package also provides access to tetgen's binary executable. Try:

$ tetgen -h

Dependencies

c++

python

build

Project details

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License: GNU Affero General Public License v3

Author: Jaewook Lee

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This version

0.0.1

0.0.0

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