# Quaternion::ToMatrix4x4

```cpp
Matrix4x4 ToMatrix4x4() const
```

将四元数转换为 4x4 旋转矩阵。

**返回：** `Matrix4x4` - 旋转矩阵

**复杂度：** O(1)

**示例：**

```cpp
Quaternion rot = ...;
Matrix4 mat = rot.ToMatrix4x4();
```