import { useRef, useEffect } from 'react';
class Grad {
constructor(x, y, z) {
this.x = x;
this.y = y;
this.z = z;
}
dot2(x, y) {
return this.x * x + this.y * y;
}
}
class Noise {
constructor(seed = 0) {
this.grad3 = [
new Grad(1, 1, 0),
new Grad(-1, 1, 0),
new Grad(1, -1, 0),
new Grad(-1, -1, 0),
new Grad(1, 0, 1),
new Grad(-1, 0, 1),
new Grad(1, 0, -1),
new Grad(-1, 0, -1),
new Grad(0, 1, 1),
new Grad(0, -1, 1),
new Grad(0, 1, -1),
new Grad(0, -1, -1)
];
this.p = [
151, 160, 137, 91, 90, 15, 131, 13, 201, 95, 96, 53, 194, 233, 7, 225, 140, 36, 103, 30, 69, 142, 8, 99, 37, 240,
21, 10, 23, 190, 6, 148, 247, 120, 234, 75, 0, 26, 197, 62, 94, 252, 219, 203, 117, 35, 11, 32, 57, 177, 33, 88,
237, 149, 56, 87, 174, 20, 125, 136, 171, 168, 68, 175, 74, 165, 71, 134, 139, 48, 27, 166, 77, 146, 158, 231, 83,
111, 229, 122, 60, 211, 133, 230, 220, 105, 92, 41, 55, 46, 245, 40, 244, 102, 143, 54, 65, 25, 63, 161, 1, 216,
80, 73, 209, 76, 132, 187, 208, 89, 18, 169, 200, 196, 135, 130, 116, 188, 159, 86, 164, 100, 109, 198, 173, 186,
3, 64, 52, 217, 226, 250, 124, 123, 5, 202, 38, 147, 118, 126, 255, 82, 85, 212, 207, 206, 59, 227, 47, 16, 58,
17, 182, 189, 28, 42, 223, 183, 170, 213, 119, 248, 152, 2, 44, 154, 163, 70, 221, 153, 101, 155, 167, 43, 172, 9,
129, 22, 39, 253, 19, 98, 108, 110, 79, 113, 224, 232, 178, 185, 112, 104, 218, 246, 97, 228, 251, 34, 242, 193,
238, 210, 144, 12, 191, 179, 162, 241, 81, 51, 145, 235, 249, 14, 239, 107, 49, 192, 214, 31, 181, 199, 106, 157,
184, 84, 204, 176, 115, 121, 50, 45, 127, 4, 150, 254, 138, 236, 205, 93, 222, 114, 67, 29, 24, 72, 243, 141, 128,
195, 78, 66, 215, 61, 156, 180
];
this.perm = new Array(512);
this.gradP = new Array(512);
this.seed(seed);
}
seed(seed) {
if (seed > 0 && seed < 1) seed *= 65536;
seed = Math.floor(seed);
if (seed < 256) seed |= seed << 8;
for (let i = 0; i < 256; i++) {
let v = i & 1 ? this.p[i] ^ (seed & 255) : this.p[i] ^ ((seed >> 8) & 255);
this.perm[i] = this.perm[i + 256] = v;
this.gradP[i] = this.gradP[i + 256] = this.grad3[v % 12];
}
}
fade(t) {
return t * t * t * (t * (t * 6 - 15) + 10);
}
lerp(a, b, t) {
return (1 - t) * a + t * b;
}
perlin2(x, y) {
let X = Math.floor(x),
Y = Math.floor(y);
x -= X;
y -= Y;
X &= 255;
Y &= 255;
const n00 = this.gradP[X + this.perm[Y]].dot2(x, y);
const n01 = this.gradP[X + this.perm[Y + 1]].dot2(x, y - 1);
const n10 = this.gradP[X + 1 + this.perm[Y]].dot2(x - 1, y);
const n11 = this.gradP[X + 1 + this.perm[Y + 1]].dot2(x - 1, y - 1);
const u = this.fade(x);
return this.lerp(this.lerp(n00, n10, u), this.lerp(n01, n11, u), this.fade(y));
}
}
const Waves = ({
lineColor = 'black',
backgroundColor = 'transparent',
waveSpeedX = 0.0125,
waveSpeedY = 0.005,
waveAmpX = 32,
waveAmpY = 16,
xGap = 10,
yGap = 32,
friction = 0.925,
tension = 0.005,
maxCursorMove = 100,
style = {},
className = ''
}) => {
const containerRef = useRef(null);
const canvasRef = useRef(null);
const ctxRef = useRef(null);
const boundingRef = useRef({ width: 0, height: 0, left: 0, top: 0 });
const noiseRef = useRef(new Noise(Math.random()));
const linesRef = useRef([]);
const mouseRef = useRef({
x: -10,
y: 0,
lx: 0,
ly: 0,
sx: 0,
sy: 0,
v: 0,
vs: 0,
a: 0,
set: false
});
const configRef = useRef({
lineColor,
waveSpeedX,
waveSpeedY,
waveAmpX,
waveAmpY,
friction,
tension,
maxCursorMove,
xGap,
yGap
});
const frameIdRef = useRef(null);
useEffect(() => {
configRef.current = {
lineColor,
waveSpeedX,
waveSpeedY,
waveAmpX,
waveAmpY,
friction,
tension,
maxCursorMove,
xGap,
yGap
};
}, [lineColor, waveSpeedX, waveSpeedY, waveAmpX, waveAmpY, friction, tension, maxCursorMove, xGap, yGap]);
useEffect(() => {
const canvas = canvasRef.current;
const container = containerRef.current;
ctxRef.current = canvas.getContext('2d');
function setSize() {
boundingRef.current = container.getBoundingClientRect();
canvas.width = boundingRef.current.width;
canvas.height = boundingRef.current.height;
}
function setLines() {
const { width, height } = boundingRef.current;
linesRef.current = [];
const oWidth = width + 200,
oHeight = height + 30;
const { xGap, yGap } = configRef.current;
const totalLines = Math.ceil(oWidth / xGap);
const totalPoints = Math.ceil(oHeight / yGap);
const xStart = (width - xGap * totalLines) / 2;
const yStart = (height - yGap * totalPoints) / 2;
for (let i = 0; i <= totalLines; i++) {
const pts = [];
for (let j = 0; j <= totalPoints; j++) {
pts.push({
x: xStart + xGap * i,
y: yStart + yGap * j,
wave: { x: 0, y: 0 },
cursor: { x: 0, y: 0, vx: 0, vy: 0 }
});
}
linesRef.current.push(pts);
}
}
function movePoints(time) {
const lines = linesRef.current,
mouse = mouseRef.current,
noise = noiseRef.current;
const { waveSpeedX, waveSpeedY, waveAmpX, waveAmpY, friction, tension, maxCursorMove } = configRef.current;
lines.forEach(pts => {
pts.forEach(p => {
const move = noise.perlin2((p.x + time * waveSpeedX) * 0.002, (p.y + time * waveSpeedY) * 0.0015) * 12;
p.wave.x = Math.cos(move) * waveAmpX;
p.wave.y = Math.sin(move) * waveAmpY;
const dx = p.x - mouse.sx,
dy = p.y - mouse.sy;
const dist = Math.hypot(dx, dy),
l = Math.max(175, mouse.vs);
if (dist < l) {
const s = 1 - dist / l;
const f = Math.cos(dist * 0.001) * s;
p.cursor.vx += Math.cos(mouse.a) * f * l * mouse.vs * 0.00065;
p.cursor.vy += Math.sin(mouse.a) * f * l * mouse.vs * 0.00065;
}
p.cursor.vx += (0 - p.cursor.x) * tension;
p.cursor.vy += (0 - p.cursor.y) * tension;
p.cursor.vx *= friction;
p.cursor.vy *= friction;
p.cursor.x += p.cursor.vx * 2;
p.cursor.y += p.cursor.vy * 2;
p.cursor.x = Math.min(maxCursorMove, Math.max(-maxCursorMove, p.cursor.x));
p.cursor.y = Math.min(maxCursorMove, Math.max(-maxCursorMove, p.cursor.y));
});
});
}
function moved(point, withCursor = true) {
const x = point.x + point.wave.x + (withCursor ? point.cursor.x : 0);
const y = point.y + point.wave.y + (withCursor ? point.cursor.y : 0);
return { x: Math.round(x * 10) / 10, y: Math.round(y * 10) / 10 };
}
function drawLines() {
const { width, height } = boundingRef.current;
const ctx = ctxRef.current;
ctx.clearRect(0, 0, width, height);
ctx.beginPath();
ctx.strokeStyle = configRef.current.lineColor;
linesRef.current.forEach(points => {
let p1 = moved(points[0], false);
ctx.moveTo(p1.x, p1.y);
points.forEach((p, idx) => {
const isLast = idx === points.length - 1;
p1 = moved(p, !isLast);
const p2 = moved(points[idx + 1] || points[points.length - 1], !isLast);
ctx.lineTo(p1.x, p1.y);
if (isLast) ctx.moveTo(p2.x, p2.y);
});
});
ctx.stroke();
}
function tick(t) {
const mouse = mouseRef.current;
mouse.sx += (mouse.x - mouse.sx) * 0.1;
mouse.sy += (mouse.y - mouse.sy) * 0.1;
const dx = mouse.x - mouse.lx,
dy = mouse.y - mouse.ly;
const d = Math.hypot(dx, dy);
mouse.v = d;
mouse.vs += (d - mouse.vs) * 0.1;
mouse.vs = Math.min(100, mouse.vs);
mouse.lx = mouse.x;
mouse.ly = mouse.y;
mouse.a = Math.atan2(dy, dx);
container.style.setProperty('--x', `${mouse.sx}px`);
container.style.setProperty('--y', `${mouse.sy}px`);
movePoints(t);
drawLines();
frameIdRef.current = requestAnimationFrame(tick);
}
function onResize() {
setSize();
setLines();
}
function onMouseMove(e) {
updateMouse(e.clientX, e.clientY);
}
function onTouchMove(e) {
const touch = e.touches[0];
updateMouse(touch.clientX, touch.clientY);
}
function updateMouse(x, y) {
const mouse = mouseRef.current,
b = boundingRef.current;
mouse.x = x - b.left;
mouse.y = y - b.top;
if (!mouse.set) {
mouse.sx = mouse.x;
mouse.sy = mouse.y;
mouse.lx = mouse.x;
mouse.ly = mouse.y;
mouse.set = true;
}
}
setSize();
setLines();
frameIdRef.current = requestAnimationFrame(tick);
window.addEventListener('resize', onResize);
window.addEventListener('mousemove', onMouseMove);
window.addEventListener('touchmove', onTouchMove, { passive: false });
return () => {
window.removeEventListener('resize', onResize);
window.removeEventListener('mousemove', onMouseMove);
window.removeEventListener('touchmove', onTouchMove);
cancelAnimationFrame(frameIdRef.current);
};
}, []);
return (
<div
ref={containerRef}
style={{
backgroundColor,
...style
}}
className={`absolute top-0 left-0 w-full h-full overflow-hidden ${className}`}
>
<div
className="absolute top-0 left-0 bg-[#160000] rounded-full w-[0.5rem] h-[0.5rem]"
style={{
transform: 'translate3d(calc(var(--x) - 50%), calc(var(--y) - 50%), 0)',
willChange: 'transform'
}}
/>
<canvas ref={canvasRef} className="block w-full h-full" />
</div>
);
};
export default Waves;