NAME¶

gmk_m2, gmk_m3 - create 2D and 3D grid source graphs

SYNOPSIS¶

gmk_m2 [options] [-b?bval] [-g?cfile] [-t] [-y] dimX dimY [ofile]
gmk_m3 [options] [-b?bval] [-g?cfile] [-t] [-y] dimX dimY dimZ [ofile]

DESCRIPTION¶

The gmk_* programs create source graph files for some common, regular topologies.

gmk_m2 creates a 2D regular grid graph of dimX times dimY vertices, such that vertex (i,j) is connected to vertices (i,j-1), (i-1,j), (i+1,j) and (i,j+1), if they exist. If the -e option is set, it is additionally connected to vertices (i-1,j-1), (i+1,j-1), (i-1,j+1) and (i+1,j+1), if they exist.

gmk_m3 creates a 3D regular grid graph of dimX times dimY times dimZ vertices, such that vertex (i,j,k) is connected to vertices (i,j,k-1), (i,j-1,k), (i-1,j,k), (i+1,j,k), (i,j+1,k) and (i,j,k+1), if they exist.

OPTIONS¶

-b?bval

Set the base value of the graph to bval. Default base value is 0.

-e

Build a 8-neighbor grid rather than a 4-neighbor one (for gmk_m2 only).

-g?cfile

Output graph vertex coordinates (that is, geometry data to be used by gout) in file cfile.

-h

Display some help.

-t

Builds a torus rather than a grid.

-V

Display program version and copyright.

-y

Invert y coordinate in geometry.

EXAMPLE¶

Create a 2D graph of 5x7 vertices, of base 1, along with its geometry:

    $ gmk_m2 5 7 -b1 -g/tmp/m5x7.xyz /tmp/m5x7.grf

SEE ALSO¶

gtst(1), gout(1), gmap(1), gord(1), gpart(1).

Scotch user's manual.

AUTHOR¶

Francois Pellegrini <francois.pellegrini@labri.fr>