mkgeo_ball (1rheolef)

        mkgeo_ball options [n]

The following command build a triangle based 2d unstructured mesh of the unit ball

        mkgeo_ball -t 10 > ball-10.geo
        geo -mayavi ball-10.geo

or in one comand line:

        mkgeo_ball -t 10 | geo -mayavi -

This command is usefull when testing programs on simple geometries. Invocation is similar to mkgeo_grid (see mkgeo_grid(1), mkgeo_ugrid(1)). It calls gmsh as unstructured mesh generator. It avoid the preparation of an input file for a mesh generator. The optional n argument is an integer that specifies the subdivision in each direction. By default n=10. The mesh files goes on standard output.

-t

2d mesh using triangles.

-q

2d mesh using quadrangles.

-tq

2d mesh using both triangles and quadrangles.

-order int

The polynomial pproximation mesh order, for the curved boundary, as defined by gmsh. Defualt is order=1.

The geometry can be ellipse/ellipsoid inscribted in the [a,b]x[c,d] rectangle or the [a,b]x[c,d]x[f,g] parallelotope. By default a=c=f=-1 and b=d=g=1, thus, the unit balls are considered.

-s

Only a surface mesh is generated: a curved line in 2d or a curved surface mesh in 3d. In 3d, supports both '-t' and '-q' options.

-a float

-b float

-c float

-d float

-f float

-g float

The meshes defines a domain named boundary that groups all boundary sides.

-fix

-nofix

By default, internal face and volume node from gmsh are recomputed, since they have incorrect coordinate that destroy the convergence properties of isoparametric high order elements (order >= 3). The -nofix option skip this correction: this option is available for test purpose.

-clean

clear temporary files (this is the default).

-noclean

does not clear temporary files.

-verbose

-noverbose

print intermediate commands and information messages.

mkgeo_grid(1), mkgeo_ugrid(1)