import { BubbleState } from '../models/internal/bubble-state';
/**
 * ILayoutEngine — computes and updates bubble positions.
 * Writes ONLY physics fields: x, y, radius, vx, vy.
 * Never touches render fields (renderX, renderY, etc.).
 */
export interface ILayoutEngine {
    /**
     * Initialize layout with data and canvas dimensions.
     * Computes initial positions and radii.
     */
    initialize(bubbles: BubbleState[], width: number, height: number): void;
    /**
     * Run one tick of the layout/simulation.
     * @returns true if still active (physics not settled), false if settled
     */
    tick(): boolean;
    /**
     * Called when chart.update() is invoked with new data.
     * Reconciles existing bubbles with new data, sets tweenFrom for continuity.
     */
    update(bubbles: BubbleState[], width: number, height: number): void;
    /** Release any resources (timers, etc.) */
    dispose(): void;
}