|y|=(R^2-x^2-C) / sqrt(R^2-x^2) , |x| C=(R-1)*(R+2)
改错：C=（R+1)*(R-1)
Right,but if x>1 your function,...
回复：Right,but if x greater 1 your function,...
15少
2010-04-24 13:38:00改错：C=（R+1)*(R-1)