TetGenLink`

TetGenLink`

TetGenGetNeighbors

TetGenGetNeighbors[expr]

gets the neighbors in a TetGen expression.

Details and Options

To use TetGenGetNeigbors, you first need to load it using Needs["TetGenLink`"].
TetGenGetNeigbors returns a list of a list of integers that specify which tetrahedra are next to each other. An entry of indicates that the respective tetrahedron is on the boundary.
TetGenGetNeigbors needs the "n" switch to be set during the call to TetGenTetrahedralize.

Examples

Basic Examples (1)Summary of the most common use cases

First, load the package:

In[1]:=1

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https://wolfram.com/xid/0kwfnvyxs75jkzl8r6uc67dffrpuc-cbf55e

This creates an instance of a TetGen expression:

In[2]:=2

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https://wolfram.com/xid/0kwfnvyxs75jkzl8r6uc67dffrpuc-c6p5a4

Out[2]=2

This sets up points and facets to use:

In[3]:=3

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https://wolfram.com/xid/0kwfnvyxs75jkzl8r6uc67dffrpuc-0kep9

This sets the points and facets in the TetGen instance:

In[4]:=4

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https://wolfram.com/xid/0kwfnvyxs75jkzl8r6uc67dffrpuc-hk1sfz

This carries out the tetrahedralization, returning a new TetGen instance. The switch "n" requests TetGen to compute the neighbors:

In[5]:=5

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https://wolfram.com/xid/0kwfnvyxs75jkzl8r6uc67dffrpuc-bvezjn

Out[5]=5

This extracts the points and elements from the tetrahedralization:

In[6]:=6

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https://wolfram.com/xid/0kwfnvyxs75jkzl8r6uc67dffrpuc-fw39wj

This is a list of the neighboring elements, with indicating a boundary:

In[7]:=7

✖

https://wolfram.com/xid/0kwfnvyxs75jkzl8r6uc67dffrpuc-mpjgal

Out[7]=7

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