CIGAL Reference Manual, Chapter 6 (RealTime): r_edraw
usage: r_edraw opflg eflag ltime Intensity Box
R_EDRAW is a REALTIME operator. It draws an unfilled ellipse on the screen. The color is determined by the INTENSITY value, which will be mapped through the active color lookup table to produce a color. The size and position of the ellipse are determined by the BOX argument, which is a short integer array specifying a screen region (4 values: left, top, right, bottom); the ellipse is drawn with its horizontal axis determined by the width and its vertical axis determined by the height of BOX.
See Also:
CIGAL Home,
CIGAL Manual,
RealTime List,
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