# Quaternion::ToMatrix4x4

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

将四元数转换为 4x4 旋转矩阵。

**返回：** 4x4 旋转矩阵

**线程安全：** ✅

**复杂度：** O(1)

**示例：**

```cpp
#include <XCEngine/Core/Math/Quaternion.h>
#include <XCEngine/Core/Math/Matrix4.h>

using namespace XCEngine::Math;

Quaternion q = Quaternion::FromAxisAngle(Vector3::Up(), Math::Radians(90.0f));
Matrix4 m = q.ToMatrix4x4();
```

## 相关文档

- [Quaternion](quaternion.md) - 返回类总览
- [FromRotationMatrix](from-rotation-matrix.md) - 从矩阵创建