shooter/engine/animation/Animation.h

//
// Created by Иван Ильин on 26.01.2021.
//

#ifndef ENGINE_ANIMATION_H
#define ENGINE_ANIMATION_H

#include "../utils/Time.h"
#include "../Triangle.h"
#include "Interpolation.h"
#include "../Vec2D.h"

class Animation {
public:
    enum class InterpolationType {
        linear,
        cos,
        bezier,
        bouncing
    };
    enum class LoopOut {
        None,
        Cycle,
        Continue
    };
protected:
    double _time = 0; // normalized time (from 0 to 1)
    double _dtime = 0;

    double _duration = 0;
    bool _started = false;
    LoopOut _looped = LoopOut::None;
    // _p - animation progress
    double _p = 0;
    double _dp = 0;

    InterpolationType _intType = InterpolationType::bezier;
    std::unique_ptr<Vec2D> _bezier[2] = {std::make_unique<Vec2D>(Vec2D{0.8, 0}),
                                         std::make_unique<Vec2D>(Vec2D{0.2, 1})};

    // If '_waitFor' == true then we need to finish all animation before starting this one. (for example for a_wait() or a_scale())
    bool _waitFor = false;

    bool updateState();
public:
    Animation() = default;
    virtual ~Animation() = default;

    void setBezierPoints(const Vec2D& p1, const Vec2D& p2) {
        _bezier[0] = std::make_unique<Vec2D>(p1);
        _bezier[1] = std::make_unique<Vec2D>(p2);
    }
    [[nodiscard]] bool waitFor() const { return _waitFor; }


    // You should override this method for your particular animation
    virtual bool update() = 0;
};

#endif //INC_3DZAVR_ANIMATION_H