47 lines
973 B
Markdown
47 lines
973 B
Markdown
|
# RectInt::Contains
|
|||
|
|
|
|||
|
|
```cpp
|
|||
|
|
bool Contains(int32_t px, int32_t py) const;
|
|||
|
|
```
|
|||
|
|
|
|||
|
|
判断整数坐标点是否在矩形内部。
|
|||
|
|
|
|||
|
|
矩形使用左上位坐标系，内部定义为：x >= left && x < right && y >= top && y < bottom。即左边界和上边界在内部，右边界和下边界在外部。
|
|||
|
|
|
|||
|
|
**参数：**
|
|||
|
|
- `px` - 点的 x 坐标
|
|||
|
|
- `py` - 点的 y 坐标
|
|||
|
|
|
|||
|
|
**返回：** 点在矩形内部返回 true，否则返回 false
|
|||
|
|
|
|||
|
|
**线程安全：** ✅
|
|||
|
|
|
|||
|
|
**复杂度：** O(1)
|
|||
|
|
|
|||
|
|
**示例：**
|
|||
|
|
|
|||
|
|
```cpp
|
|||
|
|
#include "XCEngine/Math/Rect.h"
|
|||
|
|
#include <iostream>
|
|||
|
|
|
|||
|
|
using namespace XCEngine::Math;
|
|||
|
|
|
|||
|
|
int main() {
|
|||
|
|
RectInt rect(0, 0, 1920, 1080);
|
|||
|
|
|
|||
|
|
if (rect.Contains(960, 540)) {
|
|||
|
|
std::cout << "Point (960, 540) is inside\n";
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
if (!rect.Contains(2000, 1000)) {
|
|||
|
|
std::cout << "Point (2000, 1000) is outside\n";
|
|||
|
|
}
|
|||
|
|
|
|||
|
|
return 0;
|
|||
|
|
}
|
|||
|
|
```
|
|||
|
|
|
|||
|
|
## 相关文档
|
|||
|
|
|
|||
|
|
- [`RectInt::Intersects`](intersects.md) - 判断是否相交
|
|||
|
|
- [RectInt 总览](rectint.md)
|