Волнистые линии

Пример:

Выбрать другой фон для примера:

HTML:

<a-waves>
	<svg class="js-svg"></svg>
</a-waves>

<a-waves>

</a-waves>

CSS:

a-waves {
	--x: -5px;
	--y: 50%;
	background-image: url(photo.jpg);
	background-size: cover;
	background-position: center top;
	background-repeat: no-repeat;  
	margin: 20px 0;
	padding: 0;
	height: 600px;
	overflow: hidden;
	display: block;
	position: relative;
}
a-waves:before {
	position: absolute;
	top: 0;
	left: 0;
	width: 10px;
	height: 10px;
	background: #fff;
	border-radius: 50%;
	transform: translate3d(calc(var(--x) - 50%), calc(var(--y) - 50%), 0);
	will-change: transform;
	content: "";
}
a-waves svg {
	display: block;
	width: 100%;
	height: 100%;
}
a-waves svg path {
	fill: none;
	stroke: #fff;
	stroke-width: 1px;
}

a-waves {

--x: -5px;

--y: 50%;

background-image: url(photo.jpg);

background-size: cover;

background-position: center top;

background-repeat: no-repeat;

margin: 20px 0;

padding: 0;

height: 600px;

overflow: hidden;

display: block;

position: relative;

}

a-waves:before {

position: absolute;

top: 0;

left: 0;

width: 10px;

height: 10px;

background: #fff;

border-radius: 50%;

transform: translate3d(calc(var(--x) - 50%), calc(var(--y) - 50%), 0);

will-change: transform;

content: "";

}

a-waves svg {

display: block;

width: 100%;

height: 100%;

}

a-waves svg path {

fill: none;

stroke: #fff;

stroke-width: 1px;

}

Класс a-waves:before задает вид точки, которая движется за курсором, а a-waves svg path цвет и толщину линий

JS:

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;
			if(i & 1) {
				v = this.p[i] ^ (seed & 255);
				} else {
				v = 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);
		let Y = Math.floor(y);
		x -= X;
		y -= Y;
		X = X & 255;
		Y = 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));
	}
}
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;
	}
	dot3(x, y, z) {
		return this.x * x + this.y * y + this.z * z;
	}
}	
class AWaves extends HTMLElement {
	connectedCallback() {
		this.svg = this.querySelector('.js-svg')
		this.mouse = {
			x: -10,
			y: 0,
			lx: 0,
			ly: 0,
			sx: 0,
			sy: 0,
			v: 0,
			vs: 0,
			a: 0,
			set: false,
		}
		this.lines = []
		this.paths = []
		this.noise = new Noise(Math.random())
		this.setSize()
		this.setLines()
		this.bindEvents()
		requestAnimationFrame(this.tick.bind(this))
	}
	bindEvents() {
		window.addEventListener('resize', this.onResize.bind(this))   
		this.addEventListener('mousemove', this.onMouseMove.bind(this))
		this.addEventListener('touchmove', this.onTouchMove.bind(this))
	}
	onResize() {
		this.setSize()
		this.setLines()
	}
	onMouseMove(e) {
		this.updateMousePosition(e.clientX, e.clientY)
	}
	onTouchMove(e) {
		const touch = e.touches[0]
		this.updateMousePosition(touch.clientX, touch.clientY)
	}
	updateMousePosition(x, y) {
		const { mouse } = this
		mouse.x = x - this.getBoundingClientRect().left
		mouse.y = y - this.getBoundingClientRect().top
		if (!mouse.set) {
			mouse.sx = mouse.x
			mouse.sy = mouse.y
			mouse.lx = mouse.x
			mouse.ly = mouse.y
			mouse.set = true
		}
	}
	setSize() {
		this.bounding = this.getBoundingClientRect()
		this.svg.style.width = `${this.bounding.width}px`
		this.svg.style.height = `${this.bounding.height}px`
	}
	setLines() {
		const { width, height } = this.bounding   
		this.lines = []
		this.paths.forEach((path) => {
			path.remove()
		})
		this.paths = []
		const xGap = 10
		const yGap = 32
		const oWidth = width + 200
		const oHeight = height + 30
		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 points = []
			for (let j = 0; j <= totalPoints; j++) {
				const point = {
					x: xStart + xGap * i,
					y: yStart + yGap * j,
					wave: { x: 0, y: 0 },
					cursor: { x: 0, y: 0, vx: 0, vy: 0 },
				}
				points.push(point)
			}
			const path = document.createElementNS(
				'http://www.w3.org/2000/svg',
				'path'
			)
			path.classList.add('a__line')
			path.classList.add('js-line')
			this.svg.appendChild(path)
			this.paths.push(path)
			this.lines.push(points)
		}
	}
	movePoints(time) {
		const { lines, mouse, noise } = this
		lines.forEach((points) => {
			points.forEach((p) => {
				const move =
				noise.perlin2(
					(p.x + time * 0.0125) * 0.002,
					(p.y + time * 0.005) * 0.0015
				) * 12
				p.wave.x = Math.cos(move) * 32
				p.wave.y = Math.sin(move) * 16
				const dx = p.x - mouse.sx
				const dy = p.y - mouse.sy
				const d = Math.hypot(dx, dy)
				const l = Math.max(175, mouse.vs)
				if (d < l) {
					const s = 1 - d / l
					const f = Math.cos(d * 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) * 0.005 // String tension
				p.cursor.vy += (0 - p.cursor.y) * 0.005
				p.cursor.vx *= 0.925 // Friction/duration
				p.cursor.vy *= 0.925
				p.cursor.x += p.cursor.vx * 2 // Strength
				p.cursor.y += p.cursor.vy * 2
				p.cursor.x = Math.min(100, Math.max(-100, p.cursor.x)) // Clamp movement
				p.cursor.y = Math.min(100, Math.max(-100, p.cursor.y))
			})
		})
	}
	moved(point, withCursorForce = true) {
		const coords = {
			x: point.x + point.wave.x + (withCursorForce ? point.cursor.x : 0),
			y: point.y + point.wave.y + (withCursorForce ? point.cursor.y : 0),
		}
		coords.x = Math.round(coords.x * 10) / 10
		coords.y = Math.round(coords.y * 10) / 10
		return coords
	}
	drawLines() {
		const { lines, moved, paths } = this   
		lines.forEach((points, lIndex) => {
			let p1 = moved(points[0], false)
			let d = `M ${p1.x} ${p1.y}`
			points.forEach((p1, pIndex) => {
				const isLast = pIndex === points.length - 1
				p1 = moved(p1, !isLast)
				const p2 = moved(
					points[pIndex + 1] || points[points.length - 1],
					!isLast
				)
				d += `L ${p1.x} ${p1.y}`
			})
			paths[lIndex].setAttribute('d', d)
		})
	}
	tick(time) {
		const { mouse } = this
		mouse.sx += (mouse.x - mouse.sx) * 0.1
		mouse.sy += (mouse.y - mouse.sy) * 0.1
		const dx = mouse.x - mouse.lx
		const dy = mouse.y - mouse.ly
		const d = Math.hypot(dx, dy)
		mouse.v = d
		mouse.vs += (d - mouse.vs) * 0.1
		mouse.vs = Math.min(100, mouse.vs)
		mouse.lx = mouse.x
		mouse.ly = mouse.y
		mouse.a = Math.atan2(dy, dx)
		this.style.setProperty('--x', `${mouse.sx}px`)
		this.style.setProperty('--y', `${mouse.sy}px`)
		this.movePoints(time)
		this.drawLines()   
		requestAnimationFrame(this.tick.bind(this))
	}
}
customElements.define('a-waves', AWaves)

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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;

if(i & 1) {

v = this.p[i] ^ (seed & 255);

} else {

v = 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);

let Y = Math.floor(y);

x -= X;

y -= Y;

X = X & 255;

Y = 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));

}

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;

}

dot3(x, y, z) {

return this.x * x + this.y * y + this.z * z;

}

class AWaves extends HTMLElement {

connectedCallback() {

this.svg = this.querySelector('.js-svg')

this.mouse = {

x: -10,

y: 0,

lx: 0,

ly: 0,

sx: 0,

sy: 0,

v: 0,

vs: 0,

a: 0,

set: false,

}

this.lines = []

this.paths = []

this.noise = new Noise(Math.random())

this.setSize()

this.setLines()

this.bindEvents()

requestAnimationFrame(this.tick.bind(this))

}

bindEvents() {

window.addEventListener('resize', this.onResize.bind(this))

this.addEventListener('mousemove', this.onMouseMove.bind(this))

this.addEventListener('touchmove', this.onTouchMove.bind(this))

}

onResize() {

this.setSize()

this.setLines()

}

onMouseMove(e) {

this.updateMousePosition(e.clientX, e.clientY)

}

onTouchMove(e) {

const touch = e.touches[0]

this.updateMousePosition(touch.clientX, touch.clientY)

}

updateMousePosition(x, y) {

const { mouse } = this

mouse.x = x - this.getBoundingClientRect().left

mouse.y = y - this.getBoundingClientRect().top

if (!mouse.set) {

mouse.sx = mouse.x

mouse.sy = mouse.y

mouse.lx = mouse.x

mouse.ly = mouse.y

mouse.set = true

}

setSize() {

this.bounding = this.getBoundingClientRect()

this.svg.style.width = `${this.bounding.width}px`

this.svg.style.height = `${this.bounding.height}px`

}

setLines() {

const { width, height } = this.bounding

this.lines = []

this.paths.forEach((path) => {

path.remove()

})

this.paths = []

const xGap = 10

const yGap = 32

const oWidth = width + 200

const oHeight = height + 30

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 points = []

for (let j = 0; j <= totalPoints; j++) {

const point = {

x: xStart + xGap * i,

y: yStart + yGap * j,

wave: { x: 0, y: 0 },

cursor: { x: 0, y: 0, vx: 0, vy: 0 },

}

points.push(point)

}

const path = document.createElementNS(

'http://www.w3.org/2000/svg',

'path'

)

path.classList.add('a__line')

path.classList.add('js-line')

this.svg.appendChild(path)

this.paths.push(path)

this.lines.push(points)

}

movePoints(time) {

const { lines, mouse, noise } = this

lines.forEach((points) => {

points.forEach((p) => {

const move =

noise.perlin2(

(p.x + time * 0.0125) * 0.002,

(p.y + time * 0.005) * 0.0015

) * 12

p.wave.x = Math.cos(move) * 32

p.wave.y = Math.sin(move) * 16

const dx = p.x - mouse.sx

const dy = p.y - mouse.sy

const d = Math.hypot(dx, dy)

const l = Math.max(175, mouse.vs)

if (d < l) {

const s = 1 - d / l

const f = Math.cos(d * 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) * 0.005 // String tension

p.cursor.vy += (0 - p.cursor.y) * 0.005

p.cursor.vx *= 0.925 // Friction/duration

p.cursor.vy *= 0.925

p.cursor.x += p.cursor.vx * 2 // Strength

p.cursor.y += p.cursor.vy * 2

p.cursor.x = Math.min(100, Math.max(-100, p.cursor.x)) // Clamp movement

p.cursor.y = Math.min(100, Math.max(-100, p.cursor.y))

})

}

moved(point, withCursorForce = true) {

const coords = {

x: point.x + point.wave.x + (withCursorForce ? point.cursor.x : 0),

y: point.y + point.wave.y + (withCursorForce ? point.cursor.y : 0),

}

coords.x = Math.round(coords.x * 10) / 10

coords.y = Math.round(coords.y * 10) / 10

return coords

}

drawLines() {

const { lines, moved, paths } = this

lines.forEach((points, lIndex) => {

let p1 = moved(points[0], false)

let d = `M ${p1.x} ${p1.y}`

points.forEach((p1, pIndex) => {

const isLast = pIndex === points.length - 1

p1 = moved(p1, !isLast)

const p2 = moved(

points[pIndex + 1] || points[points.length - 1],

!isLast

)

d += `L ${p1.x} ${p1.y}`

})

paths[lIndex].setAttribute('d', d)

})

}

tick(time) {

const { mouse } = this

mouse.sx += (mouse.x - mouse.sx) * 0.1

mouse.sy += (mouse.y - mouse.sy) * 0.1

const dx = mouse.x - mouse.lx

const 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)

this.style.setProperty('--x', `${mouse.sx}px`)

this.style.setProperty('--y', `${mouse.sy}px`)

this.movePoints(time)

this.drawLines()

requestAnimationFrame(this.tick.bind(this))

}

customElements.define('a-waves', AWaves)

Найдено на codepen.io у пользователя Antoine Wodniack

Пример:

HTML:

CSS:

JS:

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