game/level.hpp

#pragma once

#include <cmath>
#include <SFML/Graphics.hpp>

namespace Proto4 {

    class Timer {
        const sf::Time duration;
        sf::Time elapsed = sf::seconds(0.f);

    public:
        Timer() : duration(sf::seconds(10)) {}
        Timer(sf::Time duration) : duration(duration) {}
        void update(sf::Time timestep) { elapsed += timestep; }
        float getPercent() {
            return std::max(0.f, 1 - elapsed / duration);
        }
    };

    class Ground : public sf::CircleShape, Timer {
    public:
        Ground();
        Ground(sf::Vector2f pos, float size, sf::Time fadeDuration);

        void update(sf::Time timestep);
    };


    struct SpawnState {
        sf::Vector2f position;
        float size = 0;
        sf::Vector2f direction;
    };

    class Level : public sf::Drawable, public sf::Transformable {
        std::vector<Ground> groundArea;
        SpawnState lastSpawn{};

    public:
        Level();
        Level(sf::Vector2f pos);

        virtual void draw(sf::RenderTarget &target, sf::RenderStates states) const;
        void update(sf::Time timestep);
        void spawn(float size);
    };
}