28 lines
569 B
Markdown
28 lines
569 B
Markdown
|
# Vector3::SqrMagnitude
|
||
|
|
|
||
|
|
```cpp
|
||
|
|
float SqrMagnitude() const
|
||
|
|
```
|
||
|
|
|
||
|
|
计算向量长度的平方。用于在不计算平方根的情况下比较长度，性能更优。
|
||
|
|
|
||
|
|
**返回：** `float` - 向量长度的平方
|
||
|
|
|
||
|
|
**线程安全：** ✅
|
||
|
|
|
||
|
|
**复杂度：** O(1)
|
||
|
|
|
||
|
|
**示例：**
|
||
|
|
|
||
|
|
```cpp
|
||
|
|
Vector3 v(3.0f, 4.0f, 0.0f);
|
||
|
|
float sqrMag = v.SqrMagnitude(); // 25.0f
|
||
|
|
```
|
||
|
|
|
||
|
|
## 相关文档
|
||
|
|
|
||
|
|
- [Vector3 总览](vector3.md)
|
||
|
|
- [`Magnitude`](magnitude-instance.md) - 向量长度
|
||
|
|
- [`Normalized`](normalized.md) - 归一化副本
|
||
|
|
- [`static SqrMagnitude`](sqrmagnitude.md) - 静态版本
|