63 lines
1.8 KiB
Markdown
63 lines
1.8 KiB
Markdown
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# RectInt
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**命名空间**: `XCEngine::Math`
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**类型**: `struct`
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**头文件**: `XCEngine/Math/Rect.h`
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**描述**: 二维整数矩形，用于表示像素级 2D 区域
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## 概述
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RectInt 结构体表示一个二维整数矩形，由整数位置 `(x, y)` 和尺寸 `(width, height)` 组成。与 Rect 不同，它使用 `int32_t` 类型，适合像素级操作和坐标计算。
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## 公共方法
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| 方法 | 描述 |
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|------|------|
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| [`GetLeft`](getleft.md) | 获取矩形左边界 |
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| [`GetRight`](getright.md) | 获取矩形右边界 |
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| [`GetTop`](gettop.md) | 获取矩形上边界 |
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| [`GetBottom`](getbottom.md) | 获取矩形下边界 |
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| [`GetPosition`](getposition.md) | 获取矩形位置 |
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| [`GetSize`](getsize.md) | 获取矩形尺寸 |
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| [`GetCenter`](getcenter.md) | 获取矩形中心点 |
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| [`Contains`](contains.md) | 判断点是否在矩形内 |
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| [`Intersects`](intersects.md) | 判断是否与另一矩形相交 |
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## 使用示例
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```cpp
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#include "XCEngine/Math/Rect.h"
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#include "XCEngine/Math/Vector2.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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RectInt rect(10, 20, 100, 50);
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std::cout << "Position: (" << rect.x << ", " << rect.y << ")\n";
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std::cout << "Size: " << rect.width << " x " << rect.height << "\n";
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std::cout << "Left: " << rect.GetLeft() << ", Right: " << rect.GetRight() << "\n";
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std::cout << "Top: " << rect.GetTop() << ", Bottom: " << rect.GetBottom() << "\n";
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if (rect.Contains(50, 30)) {
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std::cout << "Point (50, 30) is inside rect\n";
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}
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RectInt other(60, 40, 100, 50);
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if (rect.Intersects(other)) {
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std::cout << "Rects intersect\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`](../rect/rect.md) - 浮点矩形
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- [`Viewport`](../rect/viewport.md) - 视口
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- [`Vector2`](../vector2/vector2.md) - 二维向量
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