Lines Matching defs:dy
300 register int dx = x0 - x1, dy = y0 - y1;302 if (dy < 0) dy = -dy;306 return (dx < dy) ? dy : dx;313 register int dx = x0 - x1, dy = y0 - y1;314 return dx * dx + dy * dy;321 int dx = x0 - x1, dy = y0 - y1;325 return((boolean)(!dy || !dx || (dy == dx) || (dy + dx == 0))); /* (dy == -dx) */