convex-hull-visualizer/Game.h

#ifndef GAME_H
#define GAME_H

#include <vector>
#include <deque>

#include "input/Keys.h"
#include "rendering/Renderer.h"

class Game final {
public:
    Game(Keys& control);

    void tick();
    void render(float lag, Renderer& renderer) const;
    bool isRunning() const;

private:
    struct Point {
        bool operator<(const Point& other);

        float x;
        float y;
    };
    
    bool isLowerTangent(const Point& a, const Point& b, const std::vector<Point>& hull) const;
    bool isUpperTangent(const Point& a, const Point& b, const std::vector<Point>& hull) const;
    
    void findLowerTangent(const std::vector<Point>& hullA, const std::vector<Point>& hullB, int& a, int& b) const;
    void findUpperTangent(const std::vector<Point>& hullA, const std::vector<Point>& hullB, int& a, int& b) const;
    
    int findMaxX(const std::vector<Point>& hull) const;
    int findMinX(const std::vector<Point>& hull) const;
    
    void split();
    
    float det(const Point& a, const Point& b, const Point& c) const;
    void merge();

    Keys& keys;
    int keyNext;
    
    std::vector<Point> data;
    std::vector<Point> convexHull;
    
    int active;
    std::deque<std::vector<Point>> groups[2];
};

#endif