These files describe to LGD how to draw points on the IRIS.
They each describe little boxes of various sizes.

Each line in the file consists of
	m	x	y	z
where m=0 means move, m=1 means draw, and (x,y,z) are rel
coords in the screen coordinate system.

LGD is not very smart about the way it does this.  If you write a new
point def file, you must make sure that the current point ends at the
same place it starts.

To use one of these point files when using Heisenberg
on an IRIS, put it in your home dir and name it
	.lgdiris4point
