50 lines
1.0 KiB
Markdown
50 lines
1.0 KiB
Markdown
# Rect::Contains
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判断点是否在矩形内部。
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```cpp
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bool Contains(float px, float py) const;
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bool Contains(const Vector2& point) const;
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```
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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。
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**参数：**
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- `px` - 点的 x 坐标
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- `py` - 点的 y 坐标
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- `point` - 要判断的点（Vector2 类型）
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**返回：** 点在矩形内部返回 true，否则返回 false
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**线程安全：** ✅
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**复杂度：** O(1)
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**示例：**
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```cpp
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#include "XCEngine/Math/Rect.h"
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#include <iostream>
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using namespace XCEngine::Math;
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int main() {
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Rect rect(10.0f, 20.0f, 100.0f, 50.0f);
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if (rect.Contains(50.0f, 30.0f)) {
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std::cout << "Point (50, 30) is inside\n";
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}
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Vector2 point(150.0f, 100.0f);
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if (!rect.Contains(point)) {
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std::cout << "Point (150, 100) is outside\n";
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}
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return 0;
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}
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```
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## 相关文档
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- [`Rect::Intersects`](intersects.md) - 判断是否相交
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- [Rect 总览](rect.md) |