246 	int x0, y0, x2, y2, r;  in drawarc()  local
248 	x0 = hpos + dx1;	/* center */  in drawarc()
250 	x2 = x0 + dx2;	/* "to" */  in drawarc()
253 	conicarc(x0, -y0, hpos, -vpos, x2, -y2, r, r);  in drawarc()
275 conicarc(x, y, x0, y0, x1, y1, a, b)  in conicarc()  argument
307 		radius = sqrt((float)(sqr(x0 - x) + sqr(y0 - y)));  in conicarc()
311 	xc = x0;  in conicarc()
318 	slope = atan2((double)(y0 - y), (double)(x0 - x) );  in conicarc()
319 	if (slope == 0.0 && x0 < x)  in conicarc()
321 	x0 = x + radius * cos(slope) + 0.5;  in conicarc()
329 	xs = x0 - x;  in conicarc()