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Questions tagged [tetgenlink]

Questions on TetGenLink, a Mathematica application that links to TetGen, a quality tetrahedral mesh generator and a 3D Delaunay triangulator.

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3 votes
3 answers
1k views

How to generate 2D FEM mesh in Mathematica?

To generate 3D mesh TetGen can be easily used. Are there similar functions (or a way to use TetGen) to generate 2d mesh? I know that such functionality can be easily implemented but I would like to ...
3 votes
1 answer
197 views

What does "TetGenTetrahedralize: Tetrahedralize returned an error, 2. mean? Also error number 1,2,3...?

regioncalc5 = ToElementMesh[regioncalc4, MeshRefinementFunction -> ff] TetGenTetrahedralize: Tetrahedralize returned an error, 2.
10 votes
2 answers
1k views

Computing volume from node coordinates on the surface of a non-convex solid

I have a question regarding computation of volume of an irregular shape. I have looked around Mathematica -StackExchange but I could not find a solution which suits me the best. Problem Description: I ...
19 votes
0 answers
2k views

Using TetGen in Mathematica to get 3D Voronoi diagram

In this post, the use of TetGen for 3D Voronoi tesselation has been briefly discussed. However there is still no info about the use of TetGen to generate a 3D Voronoi diagram. The TetGen documentation ...
23 votes
3 answers
5k views

Finding a Concave Hull

I have 3D clustered data: Is there any other way to get the concave hull of 3D data points?
3 votes
1 answer
166 views

Visualizing Ten Node (Quadratic) Tetrahedron

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4 votes
1 answer
512 views

Interpolation of data on a 4D grid

I have a 4D grid ...
8 votes
2 answers
6k views

Delaunay Triangulation for 3D Surface Data

I want to do a Delaunay triangulation on scattered 3D surface data. Mathematica itself does it only for 2D through the command DelaunayTriangulation[], which gives ...
2 votes
1 answer
166 views

About TetGenTetrahedralize Mesh Size

I have used TetGenTetrahedralize to generated a cubic mesh. I want that the edge size of the triangle to be 0.2, how can realized this? And What does the word "pq1.414a1" mean? inst1 = ...
28 votes
4 answers
9k views

Efficiently determining if 3D points are within a surface composed of polygons

This is the 2nd part of a previous question which I edited to make into 2 separate questions: Extracting polygons from 3D contour plot surface As an extension of my earlier question involving simple ...
8 votes
1 answer
1k views

Meshing the surface of a non-convex object

I would like to mesh the surface of a cloud of points that may not be completely convex, for example the points in this question. Mathematica does not provide triangulation of 3D points, but there is ...
6 votes
1 answer
389 views

TetGenLink Assertion failure

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8 votes
2 answers
1k views

Finding concave hull for separated small clusters

Data : data3D = Import[file, "VertexData"]; Graphics3D[Point[data3D]] How to find concave polygon for separated small clusters.