1 /*- 2 * Copyright (c) 1980, 1986, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * %sccs.include.proprietary.c% 6 */ 7 8 #ifndef lint 9 static char sccsid[] = "@(#)arc.c 8.1 (Berkeley) 06/04/93"; 10 #endif /* not lint */ 11 12 #include "grnplot.h" 13 14 arc(x,y,x0,y0,x1,y1) 15 { 16 extern double atan2(); 17 18 if (!ingrnfile) erase(); 19 endvector(); 20 printf("ARC\n"); 21 outxy(x,y); 22 outxy(x0,y0); 23 outxy(x1,y1); 24 printf("*\n%d %d\n0\n", 25 linestyle,(int) (atan2(x1-x,y1-y)-atan2(x0-x,y0-y))); 26 curx =x; 27 cury =y; 28 } 29