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XCEngine/docs/api/math/matrix4/get-scale.md

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# Matrix4x4::GetScale
```cpp
Vector3 GetScale() const
```
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从变换矩阵中提取缩放分量。计算各列向量的长度作为缩放因子。
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**参数:** (无)
**返回:** 缩放向量
**线程安全:** ✅
**复杂度:** O(1)
**示例:**
```cpp
#include "XCEngine/Core/Math/Matrix4.h"
#include "XCEngine/Core/Math/Vector3.h"
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using namespace XCEngine::Math;
Matrix4 transform = Matrix4::TRS(
Vector3(0.0f, 0.0f, 0.0f),
Quaternion::Identity(),
Vector3(2.0f, 3.0f, 4.0f)
);
Vector3 scale = transform.GetScale();
// scale = (2.0f, 3.0f, 4.0f)
```
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## 相关文档
- [Matrix4](matrix4.md) - 返回类总览
- [GetTranslation](get-translation.md) - 获取平移分量
- [GetRotation](get-rotation.md) - 获取旋转分量
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- [Decompose](decompose.md) - 分解矩阵