export interface Dot {
    x: number;
    y: number;
    /** Pre-computed spatial noise phase: x * NOISE_FREQ_X + y * NOISE_FREQ_Y */
    noiseSpatial: number;
}
export interface GridResult {
    dots: Dot[];
    cols: number;
    sp: number;
}
export declare function buildGrid(w: number, h: number, sp: number): GridResult;
export declare function sweepX(t: number, w: number, period: number): number;