# Rect::Intersect

```cpp
static Rect Intersect(const Rect& a, const Rect& b)
```

计算两矩形的交集区域。

**参数：**
- `a` - 第一个矩形
- `b` - 第二个矩形

**返回：** `Rect` - 两矩形的交集，若无交集则返回零尺寸矩形

**复杂度：** O(1)

**示例：**

```cpp
Rect rectA(0.0f, 0.0f, 100.0f, 100.0f);
Rect rectB(50.0f, 50.0f, 100.0f, 100.0f);
Rect overlap = Rect::Intersect(rectA, rectB);  // (50, 50, 50, 50)
```