Algorithme

Pick a [e.g. -3 to 3] B = SIN(a) c = COS(a) x0 = 0 y0 = 0 x = x0 y = y0 do skip first 100 iterations Plot x, y IF x >= 0 THEN sign = 1 ELSE sign = -1 xx = y - sign * (ABS(B * x - c) ^ .5) yy = a - x x = xx y = yy loop