# Quaternion::ToEulerAngles

```cpp
Vector3 ToEulerAngles() const
```

将四元数转换为欧拉角（弧度）。

**返回：** `Vector3` - 欧拉角 (pitch, yaw, roll)

**复杂度：** O(1)

**示例：**

```cpp
Quaternion rot = ...;
Vector3 euler = rot.ToEulerAngles();
```