Движущиеся частицы на JS

Пример:

Курсором мышки можно
расталкивать частицы

HTML:

<div class="particles">	
	<canvas></canvas>
	<div>Текст в центре блока</div>
</div>

<div>Текст в центре блока</div>

</div>

CSS:

.particles {
	position: relative;
	display: flex;
	justify-content: center;
	align-items: center;
}
.particles div {
	position: absolute;
	text-align: center;
    font-size: 30px;
    font-weight: bold;
    line-height: 40px;
    color: #FFF;
    text-transform: uppercase;
    animation: neon-1 .1s ease-in-out infinite alternate;
}
@keyframes neon-1 {
    from {
        text-shadow: 0 0 6px rgba(202, 228, 225, 0.92), 0 0 30px rgba(202, 228, 225, 0.34), 0 0 12px rgba(191, 226, 255, 0.52), 0 0 21px rgba(191, 226, 255, 0.92), 0 0 34px rgba(191, 226, 255, 0.78), 0 0 54px rgba(191, 226, 255, 0.92);
	}
    to {
        text-shadow: 0 0 6px rgba(202, 228, 225, 0.98), 0 0 30px rgba(202, 228, 225, 0.42), 0 0 12px rgba(191, 226, 255, 0.58), 0 0 22px rgba(191, 226, 255, 0.84), 0 0 38px rgba(191, 226, 255, 0.88), 0 0 60px #FFF;
	}
}
.particles canvas {
	width: 100%;
	height: 500px;
	background-image: url('background.jpg');
	background-position: center center;
	background-size: cover;
}

.particles {

position: relative;

display: flex;

justify-content: center;

align-items: center;

}

.particles div {

position: absolute;

text-align: center;

font-size: 30px;

font-weight: bold;

line-height: 40px;

color: #FFF;

text-transform: uppercase;

animation: neon-1 .1s ease-in-out infinite alternate;

}

@keyframes neon-1 {

from {

text-shadow: 0 0 6px rgba(202, 228, 225, 0.92), 0 0 30px rgba(202, 228, 225, 0.34), 0 0 12px rgba(191, 226, 255, 0.52), 0 0 21px rgba(191, 226, 255, 0.92), 0 0 34px rgba(191, 226, 255, 0.78), 0 0 54px rgba(191, 226, 255, 0.92);

}

to {

text-shadow: 0 0 6px rgba(202, 228, 225, 0.98), 0 0 30px rgba(202, 228, 225, 0.42), 0 0 12px rgba(191, 226, 255, 0.58), 0 0 22px rgba(191, 226, 255, 0.84), 0 0 38px rgba(191, 226, 255, 0.88), 0 0 60px #FFF;

}

.particles canvas {

width: 100%;

height: 500px;

background-image: url('background.jpg');

background-position: center center;

background-size: cover;

}

JS:

const canvas = document.querySelector('canvas');
const ctx = canvas.getContext('2d');
const RESOLUTION = 1;
let w = canvas.width = canvas.offsetWidth * RESOLUTION;
let h = canvas.height = canvas.offsetHeight * RESOLUTION;
const PARTICLE_COUNT = 400;
const CONNECT_DISTANCE = w * 0.06;
const FORCE_DISTANCE = w * 0.2;
const r = (n = 1) => Math.random() * n;
const PI = Math.PI;
const TAU = PI * 2;
let time = new Date;
const lerp = (start, end, amt) => {
	return (1-amt)*start+amt*end
};
const distance = (x1, y1, x2, y2) => {
	const a = x1 - x2;
	const b = y1 - y2;
	return Math.sqrt( a*a + b*b );
};
const angle = (cx, cy, ex, ey) => {
	return Math.atan2(ey - cy, ex - cx);
};
const particlePrototype = () => ({
	x: w * 0.5 + (Math.cos(r(TAU)) * r(w* 0.5)),
	y: h * 0.5 + (Math.sin(r(TAU)) * r(h* 0.5)),
	angle: r(TAU),
	speed: r(0.15),
	normalSpeed: r(0.15),
	oscAmplitudeX: r(2),
	oscSpeedX: 0.001 + r(0.008),
	oscAmplitudeY: r(2),
	oscSpeedY: 0.001 + (r(0.008)),
	connectDistance: r(CONNECT_DISTANCE),
	color: {
		r: Math.round(200 + r(55)),
		g: Math.round(150 + r(105)),
		b: Math.round(200 + r(55))
	}
});
const particles = (new Array(PARTICLE_COUNT))
.fill({})
.map(particlePrototype);
const update = () => {
	particles.forEach(p1 => {
		p1.x += (Math.cos(p1.angle) + (Math.cos(time * p1.oscSpeedX) * p1.oscAmplitudeX)) * p1.speed;
		p1.y += (Math.sin(p1.angle) + (Math.cos(time * p1.oscSpeedY) * p1.oscAmplitudeY)) * p1.speed; 
		p1.speed = lerp(p1.speed, p1.normalSpeed * RESOLUTION, 0.1);   
		if (p1.x > w || p1.x < 0) {
			p1.angle = PI - p1.angle;
		}
		if (p1.y > h || p1.y < 0) {
			p1.angle = -p1.angle;
		}		
		if (r() < 0.005) 
		p1.oscAmplitudeX = r(2);
		if (r() < 0.005) 
		p1.oscSpeedX = 0.001 + (r(0.008));
		if (r() < 0.005) 
		p1.oscAmplitudeY = r(2);
		if (r() < 0.005) 
		p1.oscSpeedY = 0.001 + r(0.008);
		
		p1.x = Math.max(-0.01,Math.min(p1.x, w + 0.01));
		p1.y = Math.max(-0.01,Math.min(p1.y, h + 0.01));
	});
};
const render = () => { 
	ctx.clearRect(0,0,w,h);	
	particles.map(p1 => {
		particles
		.filter(p2 => {
			if (p1 == p2)
			return false;
			if (distance(p1.x, p1.y, p2.x, p2.y) > p1.connectDistance)
			return false;
			return true;
		})
		.map(p2 => {
			const dist = distance(p1.x, p1.y, p2.x, p2.y);
			p1.speed = lerp(p1.speed, p1.speed + (0.05 / p1.connectDistance * dist), 0.2);
			return {
				p1,
				p2,
				color: p1.color,
				opacity: Math.floor(100 / p1.connectDistance * (p1.connectDistance - dist)) / 100
			};
		})
		.forEach((line, i) => {
			const colorSwing = Math.sin(time * (line.p1.oscSpeedX));
			ctx.beginPath();
			ctx.globalAlpha = line.opacity;
			ctx.moveTo(line.p1.x, line.p1.y);
			ctx.lineTo(line.p2.x, line.p2.y);
			ctx.strokeStyle = `rgb(
			${Math.floor(line.color.r * colorSwing)},
			${Math.floor((line.color.g * 0.5) + ((line.color.g * 0.5) * colorSwing))},
			${line.color.b}
			)`
			ctx.lineWidth = (line.opacity * 4);
			ctx.stroke();
			ctx.closePath();
		});
	});
};
const loop = () => {
	time = new Date;
	update();
	render();
	window.requestAnimationFrame(loop);
};
loop();
window.addEventListener('mousemove', e => {
  const mouseX = (e.clientX - canvas.getBoundingClientRect().left) * RESOLUTION;
  const mouseY = (e.clientY - canvas.getBoundingClientRect().top) * RESOLUTION;
  particles.forEach(p => {
    const dist = distance(mouseX, mouseY, p.x, p.y);  
    if (dist < FORCE_DISTANCE && dist > 0) {
      p.angle = angle(mouseX, mouseY, p.x, p.y)
      const force = (FORCE_DISTANCE - dist) * 0.1;
      p.speed = lerp(p.speed, force, 0.2);
    }
  });	
});

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const canvas = document.querySelector('canvas');

const ctx = canvas.getContext('2d');

const RESOLUTION = 1;

let w = canvas.width = canvas.offsetWidth * RESOLUTION;

let h = canvas.height = canvas.offsetHeight * RESOLUTION;

const PARTICLE_COUNT = 400;

const CONNECT_DISTANCE = w * 0.06;

const FORCE_DISTANCE = w * 0.2;

const r = (n = 1) => Math.random() * n;

const PI = Math.PI;

const TAU = PI * 2;

let time = new Date;

const lerp = (start, end, amt) => {

return (1-amt)*start+amt*end

};

const distance = (x1, y1, x2, y2) => {

const a = x1 - x2;

const b = y1 - y2;

return Math.sqrt( a*a + b*b );

};

const angle = (cx, cy, ex, ey) => {

return Math.atan2(ey - cy, ex - cx);

};

const particlePrototype = () => ({

x: w * 0.5 + (Math.cos(r(TAU)) * r(w* 0.5)),

y: h * 0.5 + (Math.sin(r(TAU)) * r(h* 0.5)),

angle: r(TAU),

speed: r(0.15),

normalSpeed: r(0.15),

oscAmplitudeX: r(2),

oscSpeedX: 0.001 + r(0.008),

oscAmplitudeY: r(2),

oscSpeedY: 0.001 + (r(0.008)),

connectDistance: r(CONNECT_DISTANCE),

color: {

r: Math.round(200 + r(55)),

g: Math.round(150 + r(105)),

b: Math.round(200 + r(55))

}

});

const particles = (new Array(PARTICLE_COUNT))

.fill({})

.map(particlePrototype);

const update = () => {

particles.forEach(p1 => {

p1.x += (Math.cos(p1.angle) + (Math.cos(time * p1.oscSpeedX) * p1.oscAmplitudeX)) * p1.speed;

p1.y += (Math.sin(p1.angle) + (Math.cos(time * p1.oscSpeedY) * p1.oscAmplitudeY)) * p1.speed;

p1.speed = lerp(p1.speed, p1.normalSpeed * RESOLUTION, 0.1);

if (p1.x > w || p1.x < 0) {

p1.angle = PI - p1.angle;

}

if (p1.y > h || p1.y < 0) {

p1.angle = -p1.angle;

}

if (r() < 0.005)

p1.oscAmplitudeX = r(2);

if (r() < 0.005)

p1.oscSpeedX = 0.001 + (r(0.008));

if (r() < 0.005)

p1.oscAmplitudeY = r(2);

if (r() < 0.005)

p1.oscSpeedY = 0.001 + r(0.008);

p1.x = Math.max(-0.01,Math.min(p1.x, w + 0.01));

p1.y = Math.max(-0.01,Math.min(p1.y, h + 0.01));

});

};

const render = () => {

ctx.clearRect(0,0,w,h);

particles.map(p1 => {

particles

.filter(p2 => {

if (p1 == p2)

return false;

if (distance(p1.x, p1.y, p2.x, p2.y) > p1.connectDistance)

return false;

return true;

})

.map(p2 => {

const dist = distance(p1.x, p1.y, p2.x, p2.y);

p1.speed = lerp(p1.speed, p1.speed + (0.05 / p1.connectDistance * dist), 0.2);

return {

p1,

p2,

color: p1.color,

opacity: Math.floor(100 / p1.connectDistance * (p1.connectDistance - dist)) / 100

};

})

.forEach((line, i) => {

const colorSwing = Math.sin(time * (line.p1.oscSpeedX));

ctx.beginPath();

ctx.globalAlpha = line.opacity;

ctx.moveTo(line.p1.x, line.p1.y);

ctx.lineTo(line.p2.x, line.p2.y);

ctx.strokeStyle = `rgb(

${Math.floor(line.color.r * colorSwing)},

${Math.floor((line.color.g * 0.5) + ((line.color.g * 0.5) * colorSwing))},

${line.color.b}

ctx.lineWidth = (line.opacity * 4);

ctx.stroke();

ctx.closePath();

});

};

const loop = () => {

time = new Date;

update();

render();

window.requestAnimationFrame(loop);

};

loop();

window.addEventListener('mousemove', e => {

const mouseX = (e.clientX - canvas.getBoundingClientRect().left) * RESOLUTION;

const mouseY = (e.clientY - canvas.getBoundingClientRect().top) * RESOLUTION;

particles.forEach(p => {

const dist = distance(mouseX, mouseY, p.x, p.y);

if (dist < FORCE_DISTANCE && dist > 0) {

p.angle = angle(mouseX, mouseY, p.x, p.y)

const force = (FORCE_DISTANCE - dist) * 0.1;

p.speed = lerp(p.speed, force, 0.2);

}

});

За основу взят скрипт, найденный на codepen.io у пользователя Per Byhring

Александр: 19.01.2023 в 18:44

Вот всё хорошо, поставил и работает, как цвета менять? я выставляю цвета, но они какие хочешь, но не те))) можно как то проще сделать?)) а так спасибо, всё работает)

Ответить
Вэл: 10.01.2021 в 00:49

Спасибо бро! Сделал на своем сайте аналог!

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