import { Ink } from './ink';
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;
}
/** A stroked edge between two projected points (the `connecting` web). */
export interface Line {
    x1: number;
    y1: number;
    x2: number;
    y2: number;
    /** Ink value, same convention as `Dot.white`. */
    white: number;
    a?: number;
    w: number;
}
export type Projector = (x: number, y: number, z: number) => [number, number, number];
export declare function lerp(a: number, b: number, f: number): number;
export declare function frac(x: number): number;
/** Value noise on a 2D lattice — smooth, deterministic, cheap. */
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 (-π, π]. */
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;
/**
 * Painter: z-sort far→near, matte dots. On dark substrates the ink value is
 * mirrored (1 - white) so near dots read bright — the same depth language
 * on an inverted substrate. A gradient ink keeps that depth and adds hue.
 */
export declare function paint(ctx: CanvasRenderingContext2D, dots: Dot[], ink: Ink, rMin?: number): void;
/** Stroke pass for edge-based modes. Runs before `paint` so nodes sit on top. */
export declare function paintLines(ctx: CanvasRenderingContext2D, lines: Line[], ink: Ink): void;
/**
 * Dot radii were tuned for a 300pt frame; sub-linear scaling keeps small
 * spinners legible. Lower pow = radii shrink less with size.
 */
export declare function radiusScale(size: number, pow: number): number;