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XCSDD/docs/api/math/quaternion/quaternion-multiply.md
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# Quaternion * Vector3
```cpp
Vector3 operator*(const Quaternion& q, const Vector3& v)
```
用四元数旋转向量。
**参数:**
- `q` - 旋转四元数
- `v` - 要旋转的向量
**返回:** `Vector3` - 旋转后的向量
**复杂度:** O(1)
**示例:**
```cpp
Quaternion rot = Quaternion::FromEulerAngles(0.0f, 90.0f * DEG_TO_RAD, 0.0f);
Vector3 forward = Vector3::Forward();
Vector3 rotated = rot * forward;
```