export interface Dot {
    x: number;
    y: number;
    z: number;
    r: number;
    /** Ink value: 0 = darkest ink on paper. Mirrored on dark themes. */
    white: number;
    a?: number;
}
export interface Line {
    x1: number;
    y1: number;
    x2: number;
    y2: number;
    white: number;
    a?: number;
    w: number;
}
export type InkColor = readonly [number, number, number];
export type Projector = (x: number, y: number, z: number) => [number, number, number];
export declare function lerp(a: number, b: number, amount: number): number;
export declare function frac(value: number): number;
export declare function vnoise(x: number, y: number): number;
/** Deterministic hash in [0, 1). */
export declare function hashD(a: number, b: number): number;
/** Stable directions on a unit sphere (Fibonacci lattice). */
export declare function fibDir(i: number, n: number): [number, number, number];
/** Shortest signed angular distance, wrapped to (-pi, pi]. */
export declare function angleDelta(a: number, b: number): number;
/** Shared spin + tilt + orthographic projection. */
export declare function makeProj(yaw: number, tilt: number, cx: number, cy: number, scale: number): Projector;
/** Paint dots far-to-near with theme-aware grayscale or a custom ink color. */
export declare function paint(ctx: CanvasRenderingContext2D, dots: Dot[], dark: boolean, rMin?: number, ink?: InkColor): void;
export declare function paintLines(ctx: CanvasRenderingContext2D, lines: Line[], dark: boolean, ink?: InkColor): void;
export declare function radiusScale(size: number, pow: number): number;