smartfoxserver 2x 解决 Math NAN

//y轴对应 unity 的z轴
                    //必须要重新赋取，不然 用三角函数===============NAN
                    float x1=u.position.x-mu.position.x;
                    float y1=u.position.z-mu.position.z;
                    float c1=mu.position.Distance(u);
                    double a=new Double(x1);
                    double b=new Double(y1);
                    double c=new Double(c1);
                    double ang = 0;
                    if (a == 0) {
                        ang = 90;
                    }else {
                        ang =Math.abs(Math.toDegrees(Math.atan(b/a)));
                    }

在网上都搜不到。。。自己反反复复打印测试

要重新 new 个出来才行，真是恶心，，，折腾得烦死了