不知道.建议先把W有理化.
w=(1-zi)^2/(1+z^2)
=(1+z^2-2zi)/(1+z^2)
设圆为(x-1)^2+(y-i)^2=1
则z的坐标为:
x=1+sinO
y=i+cos0
代入就应该差不多了.