VTPLOT plots an array of connected vectors to terminal. Terminal\ must be in graphics mode prior to call. VTPLOT is called by PLOTVT\ and by CURLOCATE and CURMOTION., et. al. An erase flag is used to indicate whether vector string should be visible, erased, or XOR'ed. Since not all terminal support XOR, two flags for XOR are provided--one which if XOR is not supported writes visible vectors with the other which erases (if supported). Line width is simulated by replotting adjacent lines.
CALL VTPLOT (n,m,ie,iw)
n (I): number of point pairs in m
m (I): array of points to be connected with line
m(1)=x1,m(2)=y1,m(3)=x2,...
ie (I): erase flag (0=normal, 1=XOR (on), 2=erase, 3=XOR (off))
iw (I): width