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line

NAME

line


SYNOPSIS

          line x1 y1 x2 y2 [-optional link arguments]


DESCRIPTION

line creates a straight line entity of immersed boundary points. line requires four arguments. line allows for optional link arguments by interpreting the following options.

If the x1 = xmin, x2 = xmax and y1 = y2, the line is assumed to be periodic. In this case, forces are calculated between the endpoints of the line after it has been wrapped periodically. If this is not desired, the add a small amount to x1 and the net effect will be minimal. Lines in the ``y'' direction cannot be periodic.


SEE ALSO

tube, itube, polygon-ray


EXAMPLE

          line 0 0 1 2 -t 10000.0
Sets a line running from (0,0) to (1,2) and tethers the the line with springs whose stiffness is 10000.

next up previous
Next: link Up: Reference guide: Previous: grid
David Eyre
6/19/1998