Points and Collections of Points

The points that define outlines in TrueType are numbered sequentially from zero, as illustrated in the figure below, which shows both on-line points (those that a line must pass through), and off-line points (those that determine the curvature of a line):

"Raw" TrueType instructions refer to points only by number. For example, the following code positions point 20 in the o relative to point 12:

PUSHB_1[ ]
12
SRP0[ ]
PUSHB_2[ ]
20 5
MIO