# System

Systems are responsible for updating the components of entities. Each system will have an update method that will be called every frame and will handle the logic for a specific aspect of the game, such as rendering or movement.

```cpp
class System {
public:
    /**
     * @brief Virtual update method to be implemented by derived systems.
     * 
     * This method will contain the logic to update entities based on their components.
     * It is called every frame with the time elapsed since the last frame, allowing
     * systems to perform time-based updates.
     * 
     * @param dt Delta time since the last update call.
     * @param components A reference to the map storing all components associated with their entity IDs.
     */
    virtual void update(float dt, std::unordered_map<std::pair<std::type_index, int>, std::shared_ptr<Component>, PairHash>& components) = 0;
};
```


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