fc-oogmsh 0.0.6

Installation:

The fc_oogmsh Python package is available from the Python Package Index, so to install/upgrade simply type

pip install fc_oogmsh -U

Configuration:

One have to configure the package for using with gmsh. For the default configuration we run under Python:

import fc_oogmsh
fc_oogmsh.configure()

The function fc_oogmsh.configure() try to guess where is the gmsh binary. If this command failed or if we want to specify the gmsh binary location, one can use the gmsh option to specify the gmsh binary file with full path.

• For example, under Linux:

  import fc_oogmsh
  fc_oogmsh.configure(gmsh='/usr/local/GMSH/gmsh-3.0.4-Linux/bin/gmsh')

• For example, under Windows:

  import fc_oogmsh
  fc_oogmsh.configure(gmsh='C:\Users\toto\GMSH\gmsh-3.0.4-Windows/gmsh.exe')

• For example, under MacOS:

  import fc_oogmsh
  fc_oogmsh.configure(gmsh='/Users/toto/GMSH/3.0.4/Gmsh.app/Contents/MacOS/gmsh')

Now, it’s possible to run one of the demo functions

import fc_oogmsh
fc_oogmsh.demo02()

The output of the demo02() function under Linux is:

***********************
Running demo02 function
***********************
*** Build mesh file
[fc_oogmsh] Using input file: <...>/geodir/2d/condenser11.geo
[fc_oogmsh] Overwritting mesh file <...>/.local/share/fc_oogmsh/meshes/condenser11-25.msh
[fc_oogmsh] Running gmsh. Be patient... Use option verbose=3 to see gmsh output
*** Read mesh file
*** Print oGh ->
ooGmsh object
    dim : 2
  types : [1 2]
orders : [1]
    nq : 3474
      q : ndarray object[float64], size (3474, 2)
toGlobal: ndarray object[int64], size (3474,)
  sElts : list of 2 elements
*** Print oGh.sElts[0] ->
Elt object
      d : 1, type : 1, order : 1
    geo : line
    nme : 360
    me : ndarray object[int64], size (2, 360)
phys_lab: ndarray object[int64], size (360,)
geo_lab : ndarray object[int64], size (360,)
part_lab: list of 360 elements
nb_parts: ndarray object[int64], size (360,)
  nTags : list of 0 elements

Examples usage:

• We use the geometry file condenser11.geo given with the package to generate a 2D mesh file

  meshfile=fc_oogmsh.buildmesh2d('condenser11',25,force=True)

  The output of this command is:

  [fc_oogmsh] Using input file: <...>/python/fc_oogmsh/geodir/2d/condenser11.geo
  [fc_oogmsh] Overwritting mesh file /home/toto/.local/share/fc_oogmsh/meshes/condenser11-25.msh
  [fc_oogmsh] Running gmsh. Be patient... Use option verbose=3 to see gmsh output

  Thereafter one can read the mesh file by using the ooGmsh object constructor and print some informations

  oGh=fc_oogmsh.ooGmsh(meshfile)
  print('*** Print oGh ->')
  print(oGh)
  print('*** Print oGh.sElts[0] ->')
  print(oGh.sElts[0])

  The output of these commands are:

  *** Print oGh ->
  ooGmsh object
      dim : 2
    types : [1 2]
  orders : [1]
      nq : 3474
        q : ndarray object[float64], size (3474, 2)
  toGlobal: ndarray object[int64], size (3474,)
    sElts : list of 2 elements
  *** Print oGh.sElts[0] ->
  Elt object
        d : 1, type : 1, order : 1
      geo : line
      nme : 360
      me : ndarray object[int64], size (2, 360)
  phys_lab: ndarray object[int64], size (360,)
  geo_lab : ndarray object[int64], size (360,)
  part_lab: list of 360 elements
  nb_parts: ndarray object[int64], size (360,)
    nTags : list of 0 elements