PLTARC plots a circular arc segment through three specified points using the routine CIRCLE. The plotted arc will start at (x1,y1) and pass through (x2,y2) before ending at (x3,y3). In the event that any two points are coincident or all three points are colinear, a line segment from (x1,y1) to (x3,y3) will be drawn.
CALL PLTARC (x1,y1,x2,y2,x3,y3) x1 (R): x coordinate of first (start) point y1 (R): y coordinate of first (second) point x2 (R): x coordinate of second point y2 (R): y coordinate of second point x3 (R): x coordinate of last (end) point y3 (R): y coordinate of last (end) point