mkgeo_ball(1rheolef)						    rheolef-6.1 					      mkgeo_ball(1rheolef)

NAME

       mkgeo_ball -- build an unstructured mesh of an ellipsoid, in 2d or 3d

SYNOPSIS

	       mkgeo_ball options [n]

EXAMPLE

       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 -

DESCRIPTION

       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 out-
       put.

ELEMENT TYPE OPTIONS

       -t     2d mesh using triangles.

       -q     2d mesh using quadrangles.

       -tq    2d mesh using both triangles and quadrangles.

THE MESH ORDER

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

THE GEOMETRY

       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

BOUNDARY DOMAINS

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

OTHERS OPTIONS

       -fix

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

SEE ALSO

       mkgeo_grid(1), mkgeo_ugrid(1)

rheolef-6.1							    rheolef-6.1 					      mkgeo_ball(1rheolef)