holesome/src/game/camera/tracking_view.h

#ifndef HOLESOME_TRACKING_VIEW_H
#define HOLESOME_TRACKING_VIEW_H


#include "../game_object.h"
#include "../game.h"
#include "ITrackable.h"
#include "../../primitives/circle_object.h"

class TrackingView : public GameObject
{
public:
    explicit TrackingView(ITrackable *trackable = nullptr,
                          sf::Vector2f freeMoveArea = {200, 200},
                          sf::Vector2f dynamicFollowArea = {500, 500});

    ~TrackingView();


    void draw(sf::RenderWindow *window) const override;
    void lateUpdate(Game *game) override;

    sf::Vector2f getSize() const;
    sf::Vector2f getCenter() const;

private:
    sf::View *view{};
    bool hasViewChanged{};
    sf::Vector2f freeMoveArea;
    sf::Vector2f dynamicFollowArea;
    ITrackable *target;

    CircleObject *marker;

    void initializeView(Game *game);

    void setSize(sf::Vector2u windowSize);

    void followTarget();

    bool isTargetInArea(sf::Vector2f areaSize);

    sf::Vector2f getClosestPositionInArea(sf::Vector2f areaSize) const;

    /// Calculates the hardDirection the target should be pulled back in.
    /// \return Normalized vector, pointing from center to target.
    sf::Vector2f getRubber() const;

    void performHardFollow();

    void moveCenter(sf::Vector2<float> delta);

    void performDynamicFollow();
};


#endif //HOLESOME_TRACKING_VIEW_H