ParallaxSystem.hpp

Go to the documentation of this file.

#pragma once
 
#include "RType/ECS/ISystem.hpp"
#include "RType/ECS/Registry.hpp"
#include "RType/ECS/Components/Transform.hpp"
#include "RType/ECS/Components/ParallaxLayer.hpp"
 
namespace rtp::client {
 
class ParallaxSystem : public ecs::ISystem {
    public:
        explicit ParallaxSystem(ecs::Registry& r) : _r(r) {}
 
        void update(float dt) override {
        auto view = _r.zipView<ecs::components::Transform, ecs::components::ParallaxLayer>();
 
        for (auto&& [transform, parallax] : view) {
            transform.position.x -= parallax.speed * dt;
 
            float scaledWidth = parallax.textureWidth * transform.scale.x;
            if (transform.position.x <= -scaledWidth) {
                transform.position.x += scaledWidth * 2.0f;
            }
        }
    }
 
    private:
        ecs::Registry& _r;
    };
} // namespace rtp::client