import type { Momentum, DegenOptions } from '../types';
interface Particle {
    x: number;
    y: number;
    vx: number;
    vy: number;
    life: number;
    size: number;
    color: string;
}
export interface ParticleState {
    particles: Particle[];
    cooldown: number;
    burstCount: number;
}
export declare function createParticleState(): ParticleState;
/**
 * Spawn particles on large upward swings. Returns the burst intensity
 * (0 = didn't fire, 0-1 = falloff) so the caller can scale shake.
 *
 * Small, fast-moving dots that disperse widely from the live dot position.
 * Accent-colored with alpha fade.
 */
export declare function spawnOnSwing(state: ParticleState, momentum: Momentum, dotX: number, dotY: number, swingMagnitude: number, accentColor: string, dt: number, options?: DegenOptions): number;
/**
 * Update and draw particles.
 */
export declare function drawParticles(ctx: CanvasRenderingContext2D, state: ParticleState, dt: number): void;
export {};
//# sourceMappingURL=particles.d.ts.map