68 	int xd, yd;  in drawline()  local
81 	xd = dx / DX;  in drawline()
83 	if (xd == 0) {  in drawline()
96 		numdots = abs (xd);  in drawline()
97 		motincr = DX * sgn (xd);  in drawline()
106 	if (abs (xd) > abs (yd)) {  in drawline()
107 		val = slope = (float) xd/yd;  in drawline()
108 		numdots = abs (xd);  in drawline()
112 		motincr = DX * sgn (xd);  in drawline()
116 		val = slope = (float) yd/xd;  in drawline()
122 		perpincr = DX * sgn (xd);  in drawline()