PRESCRIBE Command Reference
28
ARC — draw filled-in ARC
Format
ARC inner-radius, outer-radius, start-angle, end-angle;
Parameters
inner-radius:
inner radius of arc
outer-radius:
outer radius of arc
start-angle:
starting angle
end-angle:
ending angle
Function
The ARC command works in the standard graphics mode. It draws a filled-in arc-shaped
area extending from the inner radius to the outer radius, and from the starting angle to the
ending angle. The area is filled with the pattern designated by the previous PAT, FPAT, or
GPAT command. The starting and ending angles are specified in integer degrees
measured clockwise from the vertical. (Note that the PARC command measures the
angles from the positive x axis.) The cursor is located at the center of curvature of the
arc, and does not move.
If the inner radius is zero, the area has a pie-slice shape, and can be used to fill in one
sector of a pie chart.
If the inner and outer radii are nearly equal and the fill pattern is the all-black pattern
(PAT 1, for example), the result is a line arc. The line thickness is the difference between
the two radii, rather than the value designated by the SPD (set pen diameter) command.
The ARC command does not draw the boundary of the filled-in area.
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