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# Box
带变换的包围盒结构体(支持 OBB 语义,取决于方法)。
**头文件:** `#include <XCEngine/Math/Box.h>`
**命名空间:** `XCEngine::Math`
## 结构体定义
```cpp
struct Box {
Vector3 center = Vector3::Zero();
Vector3 extents = Vector3::Zero();
Matrix4x4 transform = Matrix4x4::Identity();
};
```
**成员:**
- `center` - 包围盒中心点
- `extents` - 包围盒半长(各轴向的半径)
- `transform` - 变换矩阵(用于 OBB 检测)
**注意:** `Contains` 方法会使用 `transform` 进行真正的 OBB 检测。`Intersects(Box)` 目前使用 AABB 简化算法,未考虑旋转。
## 构造函数
- `Box()` - 默认构造
- `Box(const Vector3& center, const Vector3& extents)` - 从中心和半长构造
## 实例方法
| 方法 | 返回值 | 描述 |
|------|--------|------|
| [GetMin()](getmin.md) | `Vector3` | 局部空间最小点 |
| [GetMax()](getmax.md) | `Vector3` | 局部空间最大点 |
| [Contains(point)](contains.md) | `bool` | 点是否在盒内(使用 transform |
| [Intersects(Sphere)](intersects.md) | `bool` | 与球体相交 |
| [Intersects(Box)](intersects-box.md) | `bool` | 与另一个盒相交AABB 检测) |
| [Intersects(Ray, t)](intersects-ray.md) | `bool` | 与射线相交 |
## 相关文档
- [Math 模块总览](../math.md) - 返回 Math 模块总览