5.2.7 Disk
The syntax of the disk object is:
DISC:
disc { CENTER, NORMAL, RADIUS[, HOLE_RADIUS] [OBJECT_MODIFIERS] }
See also:
which describes a disc with center CENTER normal to the 3d-vector NORMAL
and with radius RADIUS (and a hole with radius HOLE_RADIUS)
Andreas Kriegl 2003-07-23