IShape.h

//Copyright © 2014 SDXFramework
//[License]GNU Affero General Public License, version 3
//[Contact]http://sourceforge.jp/projects/dxframework/
#pragma once
#include <Framework/IPosition.h>
#include <vector>
#include <algorithm>

namespace SDX
{
    class Complex;
    class Point;
    class Line;
    class Circle;
    class Rect;

    class Camera;
    class Color;
    class IShape : public IPosition
    {
    protected:
        static bool RectRect(double x1, double y1, double x2, double y2, double x3, double y3, double x4, double y4)
        {
            //x座標をラフチェック
            if (x1 >= x2)
            {
                if ((x1 < x3 && x1 < x4) || (x2 > x3 && x2 > x4))
                {
                    return false;
                }
            }
            else
            {
                if ((x2 < x3 && x2 < x4) || (x1 > x3 && x1 > x4))
                {
                    return false;
                }
            }
            //y座標をラフチェック
            if (y1 >= y2)
            {
                if ((y1 < y3 && y1 < y4) || (y2 > y3 && y2 > y4))
                {
                    return false;
                }
            }
            else
            {
                if ((y2 < y3 && y2 < y4) || (y1 > y3 && y1 > y4))
                {
                    return false;
                }
            }

            return true;
        }

        static bool LineLine(double x1, double y1, double x2, double y2, double x3, double y3, double x4, double y4)
        {
            //交差判定
            if ((double(x1 - x2) * (y3 - y1) + (y1 - y2) * (x1 - x3)) *
                (double(x1 - x2) * (y4 - y1) + (y1 - y2) * (x1 - x4)) > 0)
            {
                return false;
            }

            if ((double(x3 - x4) * (y1 - y3) + (y3 - y4) * (x3 - x1)) *
                (double(x3 - x4) * (y2 - y3) + (y3 - y4) * (x3 - x2)) > 0)
            {
                return false;
            }
            return true;
        }

        static int PointPoint(double x1, double y1, double x2, double y2)
        {
            return int((x1 - x2) * (x1 - x2) + (y1 - y2) * (y1 - y2));
        }

    public:

        virtual ~IShape() = default;

        virtual IShape* Clone(double x, double y) const = 0;

        virtual bool Hit(const IShape *iShape) const = 0;
        virtual bool Hit(const Complex *complex) const = 0;
        virtual bool Hit(const Point *point) const = 0;
        virtual bool Hit(const Line *line) const = 0;
        virtual bool Hit(const Rect *rect) const = 0;
        virtual bool Hit(const Circle *circle) const = 0;

        virtual void Draw(const Color &描画色) const = 0;
    };
}