concave(3G) concave(3G)
NAME
concave - allows the system to draw concave polygons
SPECIFICATION
C concave(b)
Boolean b;
FORTRAN subroutine concav(b)
logical b
DESCRIPTION
concave allows the system to draw concave polygons. When
concave is TRUE (1), the system accurately draws concave
polygons. When concave is FALSE (0), the results of drawing
a concave polygon are unpredictable. The default is FALSE
(0). If you know all your polygons are convex, set concave
to FALSE (0). You get better system performance when
concave is false because the system does not need to check
the convexity of each polygon.
SEE ALSO
poly, polf, pmv, pdr, rpmv, rpdr, pclos
Programming Guide, Section 3.6, Polygons
Page 1 (printed 8/20/87)