81 lines
2.6 KiB
Markdown
81 lines
2.6 KiB
Markdown
# Rect
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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**: 二维矩形，用于表示平面上的矩形区域
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## 概述
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Rect 结构体表示一个二维矩形，由位置 `(x, y)` 和尺寸 `(width, height)` 组成。矩形使用左上位坐标系，x 向右增加，y 向下增加。
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## 结构体成员
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| 成员 | 类型 | 描述 | 默认值 |
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|------|------|------|--------|
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| `x` | `float` | 矩形左上角 X 坐标 | `0.0f` |
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| `y` | `float` | 矩形左上角 Y 坐标 | `0.0f` |
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| `width` | `float` | 矩形宽度 | `0.0f` |
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| `height` | `float` | 矩形高度 | `0.0f` |
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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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| [`Intersect`](intersect.md) | 计算两矩形交集（静态方法） |
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| [`Union`](union.md) | 计算两矩形并集（静态方法） |
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| [`Set`](set.md) | 设置矩形所有属性 |
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| [`SetPosition`](setposition.md) | 设置矩形位置 |
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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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Rect rect(10.0f, 20.0f, 100.0f, 50.0f);
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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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std::cout << "Center: (" << rect.GetCenter().x << ", " << rect.GetCenter().y << ")\n";
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Vector2 point(50.0f, 30.0f);
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if (rect.Contains(point)) {
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std::cout << "Point is inside rect\n";
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}
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Rect other(60.0f, 40.0f, 100.0f, 50.0f);
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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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Rect intersection = Rect::Intersect(rect, other);
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std::cout << "Intersection: " << intersection.width << " x " << intersection.height << "\n";
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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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- [`RectInt`](rectint.md) - 整数矩形
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- [`Viewport`](viewport.md) - 视口
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- [`Vector2`](../vector2/vector2.md) - 二维向量 |