Chapter 2 Graphics Tutorial
2-28
!R! RES; UNIT C; NEWP; SPD .1;
PMZP 3, 4;
PCRP 4, 2, 5, 4, 6, 2;
STRK;
PAGE;
EXIT;
Figure 2. 28. Third PCRP Example
Setting the Flatness of Curves
When PRESCRIBE renders any curve, it actually converts the curve to a series of con-
nected straight line segments. The length of these line segments is referred to as a curve’s
flatness. You can change the degree of flatness with the FLAT (set FLATness) command.
The default flatness is 1 (dot). Setting smaller values of flatness results in smoother
curves, but more time is required for computing the larger number of line segments
involved. (The difference is not noticeable for a single curve, but can be substantial in
highly complex pages. Also, the difference is more noticeable with lower print resolu-
tions [for example, 300 dpi resolution].)
The following programs illustrate the results of setting the flatness to higher values.
!R! RES; UNIT C; NEWP; SPD .1;
FLAT 30;
PMZP 5, 5;
PCRP 4, 2, 5, 4, 4, 0;
STRK;
PAGE;
EXIT;
Figure 2. 29. Curve with Flatness 30
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