123 lines
3.4 KiB
C++
123 lines
3.4 KiB
C++
// Copyright (c) 2016-2018 Kiwano - 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 "Vec2.hpp"
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namespace kiwano
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{
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namespace math
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{
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// 矩形
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template <typename _Ty>
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struct RectT
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{
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public:
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using value_type = _Ty;
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Vec2T<value_type> origin; // 左上角坐标
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Vec2T<value_type> size; // 宽度和高度
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public:
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RectT() {}
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RectT(
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value_type x,
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value_type y,
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value_type width,
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value_type 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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RectT(
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const Vec2& pos,
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const Vec2& size
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)
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: origin(pos.x, pos.y)
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, size(size.x, size.y)
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{}
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RectT(
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const RectT& other
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)
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: origin(other.origin.x, other.origin.y)
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, size(other.size.x, other.size.y)
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{}
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RectT& operator= (const RectT& 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 RectT& 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 void Set(value_type x, value_type y, value_type width, value_type height) { origin = Vec2{ x, y }; size = Vec2{ width, height }; }
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inline Vec2 GetCenter() const { return Vec2{ origin.x + size.x / 2, origin.y + size.y / 2 }; }
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inline Vec2 GetLeftTop() const { return origin; }
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inline Vec2 GetRightBottom() const { return Vec2{ GetRight(), GetBottom() }; }
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inline Vec2 GetRightTop() const { return Vec2{ GetRight(), GetTop() }; }
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inline Vec2 GetLeftBottom() const { return Vec2{ GetLeft(), GetBottom() }; }
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inline value_type GetLeft() const { return origin.x; }
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inline value_type GetTop() const { return origin.y; }
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inline value_type GetRight() const { return origin.x + size.x; }
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inline value_type GetBottom() const { return origin.y + size.y; }
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inline bool IsEmpty() const { return origin.IsOrigin() && size.IsOrigin(); }
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// 判断点是否在矩形内
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inline bool ContainsPoint(const Vec2& point) const
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{
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return point.x >= origin.x && point.x <= (origin.x + size.x) &&
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point.y >= origin.y && point.y <= (origin.y + size.y);
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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 RectT& rect) const
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{
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return !((origin.x + size.x) < rect.origin.x ||
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(rect.origin.x + rect.size.x) < origin.x ||
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(origin.y + size.y) < rect.origin.y ||
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(rect.origin.y + rect.size.y) < origin.y);
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}
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};
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}
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}
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namespace kiwano
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{
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using Rect = kiwano::math::RectT<float>;
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}
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