import { Game2D } from '../../core/2d';
import { System2D } from './system.2d';
/**
 * Built-in concrete 2D Physics System, handling the movement of two dimensional Entities which are capable of moving
 *
 * To be eligible for movement, an Entity must have a Transform2D
 */
export declare class Physics2D extends System2D {
    /** Provide the System's name */
    readonly name = "Physics2D";
    /**
     * Concrete tick lifecycle methid implementing the Physics System's per-frame functionality
     *
     * Move every eligible Entity by their velocity, normalized using the frameDelta
     *
     * @param game the Game2D the System is running within
     * @param frameDelta the time between the last frame and the current, for normalizing time-dependent operations
     */
    tick(game: Game2D, frameDelta: number): void;
}