# Vector4::ToVector3

将 Vector4 转换为 Vector3，丢弃 w 分量。

```cpp
Vector3 ToVector3() const
```

**返回：** `Vector3` - 转换后的 Vector3 (x, y, z)

**复杂度：** O(1)

**示例：**

```cpp
Vector4 pos4(1.0f, 2.0f, 3.0f, 1.0f);
Vector3 pos3 = pos4.ToVector3();  // (1, 2, 3)
```

## 相关文档

- [Vector4 总览](vector4.md)
- [Vector3 总览](../vector3/vector3.md)