4 **topIIvol** meshing tool provides sequential and parallel tools for creating volumetric tetrahedral meshes from a given terrain topology via digital elevation model (DEM point-cloud `*.xyz`). Via this plugin one could produce distributed meshes suitable for domain-decomposition based solvers or simply non distributed meshes (single mesh) suitable for a sequential/parallel solver.
6 Running topIIvol Plug-in
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9 **topIIVolMesh** plug-in can be invoked via SMESH Plugin item in Mesh menu bar
11 .. image:: images/callTopIIVolMesh.png
15 **topIIVolMesh** Options
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18 Users have option of performing meshing via:
20 - *Sequential* mode: mesh computation in sequential and outputs a single mesh.
21 - *Parallel* mode: mesh computation in parallel and outputs a single mesh.
22 - *Parallel distributed* mode: mesh computation in parallel and outputs partitioned meshes.
26 By default sequential meshing mode is activated. **topIIvol_Mesher** sequential tool is called for creating volumetric tetrahedral mesh for the given DEM point-cloud. The volumetric mesh can be displayed in SALOME by ticking the "Display mesh" check-box.
28 The list of input parameters are:
30 - DEM input file: input point cloud file in .xyz format;
31 - Number of X points present in the input point cloud;
32 - Number of Y points present in the input point cloud;
33 - Number of Z points intended in the Z direction;
34 - Depth of the mesh needed;
35 - temporary directory for calculation.
39 For larger meshes the parallel meshing mode can be activated via the check-box **Parallel**. Additionally, this requires the user to provide the number of processors to be used for parallel meshing. Then, **topIIvol_ParMesher** parallel computing tool is called for creating volumetric tetrahedral mesh for the given DEM point-cloud. The volumetric mesh can be displayed in SALOME by ticking the "Display mesh" check-box.
41 The list of input parameters are:
43 - DEM input file: input point cloud file in .xyz format;
44 - Number of X points present in the input point cloud;
45 - Number of Y points present in the input point cloud;
46 - Number of Z points intended in the Z direction;
47 - Depth of the mesh needed;
49 - temporary directory for calculation.
52 Parallel distributed mode
54 For larger meshes suitable for distributed-memory solvers (domain-decomposition) the distributed parallel meshing mode can be activated via the check-box **Parallel distributed**. This requires the user to provide the number of processors to be used for parallel meshing and how to partition the mesh in each direction (X, Y, Z). Then, **topIIvol_DistMesher** computing tool is called for creating embarassingly parallel distributed meshes for the given DEM point-cloud. These volumetric mesh partitions can be displayed in SALOME by ticking the "Display mesh" check-box.
56 The list of input parameters are:
58 - DEM input file: input point cloud file in .xyz format;
59 - Number of X points present in the input point cloud;
60 - Number of Y points present in the input point cloud;
61 - Number of Z points intended in the Z direction;
62 - Depth of the mesh needed;
63 - Number of partitions in X direction;
64 - Number of partitions in Y direction;
65 - Number of partitions in Z direction;
67 - temporary directory for calculation.