122 lines
3.5 KiB
C++
122 lines
3.5 KiB
C++
// Copyright (c) 2016-2018 Easy2D - Nomango
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in
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// all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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// THE SOFTWARE.
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#pragma once
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#include "Point.hpp"
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#include "Size.hpp"
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#include <d2d1.h>
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namespace easy2d
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{
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// 矩形
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//
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// Usage:
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// 表示一个二维矩形: Rect rect = Rect(10, 20, 30, 40); // 左上角坐标为 (10, 20), 宽为 30, 高为 40
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// 矩形可以通过 Point + Size 定义, Point 表示矩形左上角坐标, Size 表示矩形宽高
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// 判断一个点是否在矩形内: bool contains = rect.ContainsPoint(p);
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// 判断两矩形是否相交: bool intersects = rect1.Intersects(rect2);
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//
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class Rect
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{
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public:
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Point origin; // 左上角坐标
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Size size; // 宽度和高度
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public:
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Rect() {}
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Rect(
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float x,
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float y,
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float width,
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float height
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)
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: origin(x, y)
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, size(width, height)
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{}
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Rect(
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const Point& pos,
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const Size& size
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)
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: origin(pos.x, pos.y)
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, size(size.width, size.height)
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{}
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Rect(
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const Rect& other
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)
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: origin(other.origin.x, other.origin.y)
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, size(other.size.width, other.size.height)
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{}
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Rect& operator= (const Rect& other)
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{
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origin = other.origin;
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size = other.size;
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return *this;
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}
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inline bool operator== (const Rect& rect) const
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{
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return (origin == rect.origin) && (size == rect.size);
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}
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inline Point GetCenter() const { return Point{ origin.x + size.width / 2, origin.y + size.height / 2 }; }
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inline Point GetLeftTop() const { return origin; }
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inline Point GetRightBottom() const { return Point{ GetRight(), GetBottom() }; }
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inline Point GetRightTop() const { return Point{ GetRight(), GetTop() }; }
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inline Point GetLeftBottom() const { return Point{ GetLeft(), GetBottom() }; }
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inline float GetLeft() const { return origin.x; }
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inline float GetTop() const { return origin.y; }
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inline float GetRight() const { return origin.x + size.width; }
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inline float GetBottom() const { return origin.y + size.height; }
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// 判断点是否在矩形内
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inline bool ContainsPoint(const Point& point) const
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{
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return point.x >= origin.x && point.x <= (origin.y + size.height) &&
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point.y >= origin.y && point.y <= (origin.y + size.height);
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}
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// 判断两矩形是否相交
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inline bool Intersects(const Rect& rect) const
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{
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return !((origin.x + size.width) < rect.origin.x ||
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(rect.origin.x + rect.size.width) < origin.x ||
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(origin.y + size.height) < rect.origin.y ||
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(rect.origin.y + rect.size.height) < origin.y);
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}
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inline operator D2D1_RECT_F () const
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{
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return D2D1_RECT_F{ origin.x, origin.y, origin.x + size.width, origin.y + size.height };
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}
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};
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}
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