Magic_Game/src/kiwano/math/Rect.hpp

// Copyright (c) 2016-2018 Kiwano - Nomango
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is
// furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
// THE SOFTWARE.

#pragma once
#include <kiwano/math/Vec2.hpp>

namespace kiwano
{
namespace math
{
template <typename _Ty>
struct RectT
{
public:
    using value_type = _Ty;

    Vec2T<value_type> left_top;
    Vec2T<value_type> right_bottom;

public:
    RectT() {}

    RectT(value_type left, value_type top, value_type right, value_type bottom)
        : left_top(left, top)
        , right_bottom(right, bottom)
    {
    }

    RectT(const Vec2T<value_type>& left_top, const Vec2T<value_type>& right_bottom)
        : left_top(left_top)
        , right_bottom(right_bottom)
    {
    }

    RectT(const RectT& other)
        : left_top(other.left_top)
        , right_bottom(other.right_bottom)
    {
    }

    RectT& operator=(const RectT& other)
    {
        left_top     = other.left_top;
        right_bottom = other.right_bottom;
        return *this;
    }

    inline bool operator==(const RectT& rect) const
    {
        return (left_top == rect.left_top) && (right_bottom == rect.right_bottom);
    }

    inline void Set(value_type left, value_type top, value_type right, value_type bottom)
    {
        left_top     = Vec2T<value_type>{ left, top };
        right_bottom = Vec2T<value_type>{ right, bottom };
    }

    inline Vec2T<value_type> GetCenter() const
    {
        return Vec2T<value_type>{ (left_top.x + right_bottom.x) / 2, (left_top.y + right_bottom.y) / 2 };
    }

    inline Vec2T<value_type> GetLeftTop() const
    {
        return left_top;
    }

    inline Vec2T<value_type> GetRightBottom() const
    {
        return right_bottom;
    }

    inline Vec2T<value_type> GetRightTop() const
    {
        return Vec2T<value_type>{ right_bottom.x, left_top.y };
    }

    inline Vec2T<value_type> GetLeftBottom() const
    {
        return Vec2T<value_type>{ left_top.x, right_bottom.y };
    }

    inline value_type GetLeft() const
    {
        return left_top.x;
    }

    inline value_type GetTop() const
    {
        return left_top.y;
    }

    inline value_type GetRight() const
    {
        return right_bottom.x;
    }

    inline value_type GetBottom() const
    {
        return right_bottom.y;
    }

    inline value_type GetWidth() const
    {
        return right_bottom.x - left_top.x;
    }

    inline value_type GetHeight() const
    {
        return right_bottom.y - left_top.y;
    }

    inline Vec2T<value_type> GetSize() const
    {
        return Vec2T<value_type>{ GetWidth(), GetHeight() };
    }

    inline bool IsEmpty() const
    {
        return left_top.IsOrigin() && right_bottom.IsOrigin();
    }

    inline bool ContainsPoint(const Vec2T<value_type>& point) const
    {
        return point.x >= left_top.x && point.x <= right_bottom.x && point.y >= left_top.y && point.y <= right_bottom.y;
    }

    inline bool Intersects(const RectT& rect) const
    {
        return !(right_bottom.x < rect.left_top.x || rect.right_bottom.x < left_top.x
                 || right_bottom.y < rect.left_top.y || rect.right_bottom.y < left_top.y);
    }

    static inline RectT Infinite()
    {
        return RectT{ -math::FLOAT_MAX, -math::FLOAT_MAX, math::FLOAT_MAX, math::FLOAT_MAX };
    }
};
}  // namespace math
}  // namespace kiwano