weihuayi/gmsh

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gmsh's Issues

Meet error when using gmsh to convert triangular mesh to tetrahedral mesh

I need your help to look at this problem, the detailed error information as below:
$ gmsh -3 -o hcp_tha-lh_thr25.tetra.vtk hcp_tha-lh_thr25.geo
Info : Running 'gmsh -3 -o data/hcp_tha-lh_thr25.tetra.vtk data/hcp_tha-lh_thr25.geo' [Gmsh 4.8.4, 1 node, max. 1 thread]
Info : Started on Wed Dec 6 19:00:28 2023
Info : Reading 'data/hcp_tha-lh_thr25.geo'...
Info : Reading 'data/hcp_tha-lh_thr25.vtk'...
Info : Reading 1054 points
Info : Reading 2104 polygons
Info : Done reading 'data/hcp_tha-lh_thr25.vtk'
Info : Done reading 'data/hcp_tha-lh_thr25.geo'
Info : Meshing 1D...
Info : Done meshing 1D (Wall 1.1591e-05s, CPU 1e-05s)
Info : Meshing 2D...
Info : Done meshing 2D (Wall 1.9455e-05s, CPU 1.3e-05s)
Info : Meshing 3D...
Error : Frontal algorithm requires Netgen
Error : No elements in volume 1
Info : Done meshing 3D (Wall 7.6586e-05s, CPU 5.1e-05s)
Info : 1054 nodes 2104 elements
Error : ------------------------------
Error : Mesh generation error summary
Error : 0 warnings
Error : 2 errors
Error : Check the full log for details
Error : ------------------------------
Info : Writing 'data/hcp_tha-lh_thr25.tetra.vtk'...
Info : Done writing 'data/hcp_tha-lh_thr25.tetra.vtk'
Info : Stopped on Wed Dec 6 19:00:28 2023 (From start: Wall 0.0321755s, CPU 0.023129s)

The content of "hcp_tha-lh_thr25.geo" is listed here:
$ cat hcp_tha-lh_thr25.geo
Mesh.Algorithm3D=4;
Mesh.Optimize=1;
Mesh.OptimizeNetgen=1;
Merge "hcp_tha-lh_thr25.vtk";
Surface Loop(1) = {1};
Volume(1) = {1};
Physical Volume(1) = {1};