@[zhangpeinan123](/user/809165) dis函数不用sqrt用什么？
by Kasa_ @ 2023-07-28 00:17:15
@[Kasa_](/user/941962)
```cpp
return pow(abs(x1 - x2), 2) + pow(abs(y1 - y2), 2) + pow(abs(z1 - z2), 2) <= 4 * r * r;
```
by The_Wandering_Earth @ 2023-07-28 11:18:51
@[zhangpeinan123](/user/809165) o
by Kasa_ @ 2023-07-28 12:03:02