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XCEngine/docs/api/math/matrix4/lookat.md

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# Matrix4x4::LookAt
```cpp
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static Matrix4x4 LookAt(const Vector3& eye, const Vector3& target, const Vector3& up)
```
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创建视图矩阵(观察矩阵)。用于将世界空间中的点转换到摄像机视角。
**参数:**
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- `eye` - 摄像机位置
- `target` - 观察目标点
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- `up` - 摄像机上方向向量
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**返回:** 视图矩阵
**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 view = Matrix4::LookAt(
Vector3(0.0f, 1.0f, 5.0f),
Vector3(0.0f, 0.0f, 0.0f),
Vector3(0.0f, 1.0f, 0.0f)
);
```
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## 相关文档
- [Matrix4](matrix4.md) - 返回类总览
- [Perspective](perspective.md) - 透视投影
- [Orthographic](orthographic.md) - 正交投影