import type GameObject from './GameObject.js';
/**
 * Base class for all systems in the Entity Component System.
 * Systems contain the logic that processes entities with specific components.
 */
export default abstract class System {
    /**
     * Called every frame during the main update loop.
     * @param entities The set of entities to process.
     * @param deltaTime Time passed since the last frame in seconds.
     * @param debug Whether to draw debug information.
     */
    update?(entities: Set<GameObject>, deltaTime?: number, debug?: boolean): void;
    /**
     * Called at a fixed interval for physics and consistent logic.
     * @param entities The set of entities to process.
     * @param fixedDelta The fixed time step in seconds.
     */
    fixedUpdate?(entities: Set<GameObject>, fixedDelta: number): void;
}