import * as THREE from 'three';
export type Rgb = readonly [number, number, number];
type PolylineOptions = {
    color1: Rgb;
    color2: Rgb;
    points: THREE.Vector3[];
    uvdx: number;
    uvx: number;
};
export declare const samplePalette: (palette: readonly Rgb[], amount: number) => Rgb;
export declare class CurtainPolyline {
    color1: Rgb;
    color2: Rgb;
    count: number;
    geometry: THREE.BufferGeometry;
    points: THREE.Vector3[];
    private color;
    private next;
    private position;
    private prev;
    private readonly tmp;
    private uvdx;
    private uvx;
    constructor({ color1, color2, points, uvdx, uvx }: PolylineOptions);
    dispose(): void;
    updateColors(color1: Rgb, color2: Rgb): void;
    updateGeometry(): void;
    private init;
}
declare class CurtainParticle {
    pinned: THREE.Vector2 | null;
    pos: THREE.Vector2;
    previous: THREE.Vector2;
    constructor(position: THREE.Vector2);
    integrate(gravity: number): void;
    pin(): void;
}
declare class DistanceConstraint {
    private readonly a;
    private readonly b;
    private restLength;
    constructor(a: CurtainParticle, b: CurtainParticle);
    solve(): void;
}
export declare class CurtainSegment {
    constraints: DistanceConstraint[];
    particles: CurtainParticle[];
    constructor(points: THREE.Vector2[]);
    frame(gravity: number, iterations: number): void;
    pin(index: number): void;
}
export {};