Dotted Grid

1// Built using Hyperiux Vault: https://vault.hyperiux.com
2 
3"use client";
4 
5import { useEffect, useRef, useSyncExternalStore } from "react";
6import { createSuspendedRaf } from "./createSuspendedRaf";
7 
8const REDUCED_MOTION_QUERY = "(prefers-reduced-motion: reduce)";
9 
10function subscribeToReducedMotion(callback: () => void) {
11  if (typeof window === "undefined") return () => {};
12  const mediaQueryList = window.matchMedia(REDUCED_MOTION_QUERY);
13  mediaQueryList.addEventListener("change", callback);
14  return () => mediaQueryList.removeEventListener("change", callback);
15}
16 
17function getReducedMotionSnapshot(): boolean {
18  return window.matchMedia?.(REDUCED_MOTION_QUERY)?.matches ?? false;
19}
20 
21function getServerReducedMotionSnapshot(): boolean {
22  return false;
23}
24 
25// React hook form, for JSX output that depends on the preference (not just
26// the imperative reduceMotion flag already used inside the draw loop below).
27// Safe to call during render - returns false on the server.
28function usePrefersReducedMotion() {
29  return useSyncExternalStore(
30    subscribeToReducedMotion,
31    getReducedMotionSnapshot,
32    getServerReducedMotionSnapshot
33  );
34}
35 
36 
37const DEFAULT_SPACING = 24;
38const DEFAULT_BASE_RADIUS = 7.2;
39const DEFAULT_MOUSE_RADIUS = 380;
40const DEFAULT_TRAIL_LENGTH = 456;
41const DEFAULT_TRAIL_RADIUS = 230;
42const DEFAULT_TRAIL_FADE_MS = 1200;
43 
44const RANDOM_TIME = 0.6;
45const COLLECT_TIME = 1.1;
46const SHAPE_HOLD_TIME = 1.2;
47const GRAY_DISPERSE_TIME = 0.9; // trail lingers ~2s
48 
49const TOTAL_CYCLE_TIME = RANDOM_TIME + COLLECT_TIME + SHAPE_HOLD_TIME + GRAY_DISPERSE_TIME;
50const TOTAL_SHAPES = 5;
51 
52 
53const lerp = (a: number, b: number, t: number): number => a + (b - a) * t;
54const clamp01 = (v: number): number => Math.max(0, Math.min(1, v));
55const smoothstep = (e0: number, e1: number, v: number): number => {
56  const t = clamp01((v - e0) / (e1 - e0));
57  return t * t * (3 - 2 * t);
58};
59 
60const getStarStrength = (x: number, y: number, time: number, width: number, height: number): number => {
61  const cx = width / 2;
62  const cy = height / 2;
63  const scale = Math.min(width, height) * 0.28;
64 
65  const nx = (x - cx) / scale;
66  const ny = (y - cy) / scale;
67 
68  const r = Math.sqrt(nx * nx + ny * ny);
69  const angle = Math.atan2(ny, nx);
70 
71  const spikes = 5;
72  const star = Math.cos(spikes * angle);
73  const radius = 0.55 + 0.25 * star;
74 
75  return clamp01(1 - smoothstep(radius - 0.05, radius + 0.05, r));
76};
77 
78const getSquareStrength = (x: number, y: number, width: number, height: number): number => {
79// … truncated