Lines Matching refs:dy
75 int x, y, t, dx, dy, incx, incy, pdx, pdy, ddx, ddy, es, el, err;
79 dy = yend - ystart;
83 incy = dy > 0 ? 1 : (dy < 0) ? -1 : 0;
86 if (dy < 0)
87 dy = -dy;
90 if (dx > dy) {
96 es = dy;
105 el = dy; /* Fehlerschritte schnell, langsam */