manpages

mmg3d(1)

MMG3D(1) General Commands Manual MMG3D(1)

NAME

mmg3d — Adaptation and optimization of a tetrahedral mesh and implicit domain meshing.

SYNOPSIS

mmg3d ⟨mesh_file⟩ [output_file] [-sol ⟨solution_file⟩] [-met ⟨metric_file⟩] [-h] [-v] [-m ⟨n⟩] [-d] [-val] [-default] [-A] [-ar ⟨x⟩ | -nr] [-hmin ⟨x⟩] [-hmax ⟨x⟩] [-hsiz ⟨x⟩] [-hausd ⟨x⟩] [-hgrad ⟨x⟩] [-hgradreq ⟨x⟩] [-rmc x] [-opnbdy] [-lag ⟨n⟩] [-ls x] [-lssurf x] [-nofem] [-noinsert] [-nomove] [-noswap] [-nosurf] [-nosizreq] [-nreg] [-xreg] [-nsd] [-optim] [-optimLES] [-octree ⟨n⟩] [-rn ⟨n⟩]

DESCRIPTION

The mmg3d application is dedicated to tetrahedral remeshing. Both surface and volume mesh are modified.

By defaults it performs mesh modifications in order to control the surface approximation.
Providing a metric file, it adapts the mesh to the prescribed sizes at nodes.
Without metric file, the -optim option allows to improve the mesh quality with respect to the initial mesh size. -optimLES option allows to improve strongly the isotropic mesh quality for LES simulations.
Providing a level-set file containing the values of the level-set function at the mesh nodes, the -ls option allows to explicitly mesh an implicit domain and the -lssurf option splits mesh boundaries on a provided isovalue.
Providing a displacement file -lag option applies a lagrangian displacement to boundary mesh nodes.

COMMAND LINE ARGUMENTS

  1. Generic options:
    -h
    Print help.
    -v ⟨n⟩
    Tune level of verbosity.
    Takes values between -1 and 10.
    -m ⟨n⟩
    Set maximal memory size to n MBytes.
    -d
    Turn on debug mode.
    -default
    Write a local parameter file (with extension .mmg3d) with setted values.
    -val
    Print the default parameters values.
  2. File specifications:
    -in ⟨mesh_file⟩
    Input triangulation.
    -out ⟨output_file⟩
    Output triangulation.
    -sol ⟨solution_file⟩
    Load metric, displacement or level-set file.
    -met ⟨metric_file⟩
    Load metric file in level-set mode.
  3. Mode specifications (default is mesh adaptation):
    -lag ⟨n⟩
    Lagrangian mesh displacement according to mode 0 ( n=0 ), 1 ( n=1 ) or 2 ( n=2 ). This option is only available with the USE_ELAS compilation flag. The LinearElasticity library must be founded to activate this flag.
    -ls x
    Create mesh of isovalue x (0.0 if x is not provided).
    -lssurf x
    Split boundary mesh on isovalue x (0.0 if x is not provided).
  4. Parameters:
    -A
    Enable anisotropy (without metric file).
    -ar ⟨x⟩ | -nr
    Threshold for angle detection or sharp features detection disabling.
    -hmin ⟨x⟩
    Minimal mesh size.
    -hmax ⟨x⟩
    Maximal mesh size.
    -hsiz ⟨x⟩
    Constant mesh size.
    -hausd ⟨x⟩
    Control the Hausdorff distance between the surface mesh and the underlying surface geometry.
    -hgrad ⟨x⟩
    Control the gradation.
    -hgradreq ⟨x⟩
    Control the gradation from required entities toward others.
    -rmc x
    Remove componants whose volumic fraction is less than x (1.e-5 if x is not provided) of the whole mesh volume (level-set mode).
    -opnbdy
    Preserve input triangles at the interface of two domains of the same reference.
    -nofem
    Do not force Mmg to create a finite element mesh.
    -noinsert
    No point insertion/deletion.
    -nomove
    No point relocation
    -nosurf
    No surface modifications.
    -noswap
    No edge or face flipping.
    -nosizreq
    No imposition of the size of required edges over required vertices.
    -nreg
    Normal regularization using laplacian - antilaplacian smoothing.
    -xreg
    Vertex coordinates regularization using laplacian - antilaplacian smoothing.
    -nsd ⟨n⟩
    Save the subdomain of index n (default is n=0 which save all subdomains).
    -octree ⟨n⟩
    Specify the maximal number of point per octree cell (only available without the PATTERN compilation flag).
    -optim
    Mesh improvement with respect to the initial mesh size.
    -optimLES
    Strong isotropic mesh optimization for LES computations.
    -rn ⟨n⟩
    Turn on ( n=1 ) or off ( n=0 ) the renumbering using the SCOTCH library (only available with the USE_SCOTCH compilation flag and if the scotch library is founded).

RETURN VALUES

mmg3d returns:

  • the 0 value if successful;
  • the 1 value if the process fail but can save a conform mesh;
  • the 2 value if the process fail and can't save a comform mesh.

SEE ALSO

mmgs(1) mmg2d(1)

May 4, 2015 mmg3d