perm filename PAGE8[00,BGB] blob
sn#046240 filedate 1973-06-05 generic text, type T, neo UTF8
~F8DATA STRUCTURE: LINK AND DATUM NAMES.
Nodes contain either numerical data or pointers to other
nodes; such node pointers are actual machine addresses and are
called links. The positions within a node where a link is stored are
named and are reserved for particular uses. In the table below the
11 link names and 13 datum names are introduced. The link names
will always appear capitalized.
11 LINK NAMES:
CW clockwise
CCW counter clockwise
DAD parent of node up a tree structure.
SON descendent of a node down a tree structure.
ENDO Greek for inside, polygon within.
EXO Greek for outside, surrounding polygon.
ALT alternate.
NGON negative polygon.
PGON positive polygon.
NTIME negative in real time, into the past.
PTIME positive in real time, into the future.
13 DATUM NAMES:
Boolean datums.
type type of node bits.
reloc rellocation of node bits.
Fixed point datums.
row row of image locus.
col column of image locus.
cntrst contrast of an edge, vector and arc.
ncnt number count, various uses.
Floating point datums.
zdepth z depth from camera lens center.
perm length of perimeter.
area area in pixel units.
mxx moment of inertia about X axis.
myy moment of inertia about Y axis.
mzz moment of inertia about Z axis.
pxy product of inertia with respect
to the X and Y axes.
~I1973,800;F8- 8 -