Create captivating particle animations using HTML, CSS, and JavaScript with this free source code.
Enhance your web projects with mesmerizing visual effects by easily customizing and integrating the particle animations into your websites or applications.
Engage your audience with dynamic and interactive visuals, adding a touch of magic to your online presence.
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HTML
<!DOCTYPE html> <html lang="en" > <head> <meta charset="UTF-8"> <title>CodeAtNow | Shaping particles</title> <link rel="stylesheet" href="./style.css"> </head> <body> <!-- partial:index.partial.html --> <!-- partial --> <script src='https://cdnjs.cloudflare.com/ajax/libs/three.js/0.154.0/three.min.js'></script><script src="./script.js"></script> </body> </html>
CSS
body {
background-color: #11131e;
overflow: hidden;
}
JS
const canvas = document.createElement('canvas'),
context = canvas.getContext('2d'),
particles = []
let width = canvas.width = window.innerWidth,
height = canvas.height = window.innerHeight,
halfWidth = width / 2,
halfHeight = height / 2,
scale = Math.min(width, height),
startTime = new Date().getTime(),
now = new Date().getTime(),
shape = null,
lastShape = null
document.body.appendChild(canvas)
const shapes = {
square: {
size: .25,
points: [[-1,1],[1,1],[1,-1],[-1,-1]]
},
rhombus: {
size: .25,
points: [[0,-1],[.5,0],[0,1],[-.5,0]]
},
star: {
size: .35,
points: [[0,-1],[-0.224,-0.309],[-0.951,-0.309],[-0.361,0.118],[-0.588,0.809],[0,0.382],[0.588,0.809],[0.361,0.118],[0.951,-0.309],[0.224,-0.309]]
},
cross: {
size: .25,
points: [[-.3, -1],[.3,-1],[.3,-.3],[1,-.3],[1,.3],[.3,.3],[.3,1],[-.3,1],[-.3,.3],[-1,.3],[-1,-.3],[-.3,-.3]]
}
}
function buildShape(name, sides = 3, size = .25){
let points = []
let r = (Math.PI * 2 / sides)
let r2;
for(let i = 0; i < sides; i++){
r2 = r * i
points.push([Math.cos(r2), Math.sin(r2)])
}
shapes[name] = { size, points}
}
buildShape('diamond',4, .35)
buildShape('triangle',3)
buildShape('hexagon',6)
buildShape('circle',100)
const updateShape = () => {
let newShape = shapes[Object.keys(shapes)[Math.floor(Math.random() * Object.keys(shapes).length)]]
if(newShape == lastShape) return updateShape()
shape = newShape
}
class particle {
position = { x: 0, y: 0 }
velocity = { x: 0, y: 0 }
friction = .96
constructor(){
let avgShapeSize = Math.min(width, height) * .25
this.position = {
x: Math.random() * avgShapeSize - avgShapeSize / 2,
y: Math.random() * avgShapeSize - avgShapeSize / 2
}
particles.push(this)
this.nudge()
}
nudge = (amount) => {
if(!amount) {
amount = 4 + Math.random() * 3
}
let angle;
let random = Math.random();
if(random < .2) { angle = Math.atan2(-this.position.x, -this.position.y); amount *= .8; }
else if(random < .4) { angle = Math.atan2(this.position.x, this.position.y); amount *= .8; }
else angle = Math.random() * Math.PI * 2
angle += Math.random() * 2 - 1
this.velocity = {
x: this.velocity.x + Math.sin(angle) * amount,
y: this.velocity.y + Math.cos(angle) * amount,
}
}
update = () => {
let { x, y } = this.position;
if(shape){
const shapePoints = shape.points;
// Find the nearest line segment on the shape to the current point
let nearestSegmentStart = [shapePoints[0][0] * shape.size * scale, shapePoints[0][1] * shape.size * scale];
let nearestSegmentEnd = [shapePoints[shapePoints.length - 1][0] * shape.size * scale, shapePoints[shapePoints.length - 1][1] * shape.size * scale];
let minDistanceToSegment = this.distanceToSegment(x, y, nearestSegmentStart[0], nearestSegmentStart[1], nearestSegmentEnd[0], nearestSegmentEnd[1]);
for (let i = 1; i < shapePoints.length; i++) {
const segmentStart = [shapePoints[i - 1][0] * shape.size * scale, shapePoints[i - 1][1] * shape.size * scale];
const segmentEnd = [shapePoints[i][0] * shape.size * scale, shapePoints[i][1] * shape.size * scale];
const distanceToSegment = this.distanceToSegment(x, y, segmentStart[0], segmentStart[1], segmentEnd[0], segmentEnd[1]);
if (distanceToSegment < minDistanceToSegment) {
minDistanceToSegment = distanceToSegment;
nearestSegmentStart = segmentStart;
nearestSegmentEnd = segmentEnd;
}
}
// Calculate the projection of the current position onto the nearest line segment
const projectedPoint = this.projectPointOntoSegment(x, y, nearestSegmentStart[0], nearestSegmentStart[1], nearestSegmentEnd[0], nearestSegmentEnd[1]);
// Move the current position towards the projected point
const moveAmount = 0.038; // Adjust this value to control the speed of movement
x = x + (projectedPoint[0] - x) * moveAmount;
y = y + (projectedPoint[1] - y) * moveAmount;
}
x += this.velocity.x;
y += this.velocity.y;
this.velocity.x *= this.friction;
this.velocity.y *= this.friction;
this.position = { x, y };
}
distanceToSegment = (x, y, x1, y1, x2, y2) => {
const A = x - x1;
const B = y - y1;
const C = x2 - x1;
const D = y2 - y1;
const dot = A * C + B * D;
const lenSq = C * C + D * D;
let param = -1;
if (lenSq !== 0) // to avoid division by 0
param = dot / lenSq;
let xx, yy;
if (param < 0) {
xx = x1;
yy = y1;
} else if (param > 1) {
xx = x2;
yy = y2;
} else {
xx = x1 + param * C;
yy = y1 + param * D;
}
const dx = x - xx;
const dy = y - yy;
return Math.sqrt(dx * dx + dy * dy);
}
projectPointOntoSegment = (x, y, x1, y1, x2, y2) => {
const A = x - x1;
const B = y - y1;
const C = x2 - x1;
const D = y2 - y1;
const dot = A * C + B * D;
const lenSq = C * C + D * D;
let param = -1;
if (lenSq !== 0) // to avoid division by 0
param = dot / lenSq;
let xx, yy;
if (param < 0) {
xx = x1;
yy = y1;
} else if (param > 1) {
xx = x2;
yy = y2;
} else {
xx = x1 + param * C;
yy = y1 + param * D;
}
return [xx, yy];
}
distance = (x1, y1, x2, y2) => {
const dx = x2 - x1;
const dy = y2 - y1;
return Math.sqrt(dx * dx + dy * dy);
}
draw = () => {
let { x, y } = this.position
context.fillStyle = 'rgba(255,255,255,0.5)'
context.fillRect(x + width / 2, y + height / 2, 1, 1)
}
render = () => {
this.update()
this.draw()
}
}
const render = () => {
context.clearRect(0,0,width,height)
particles.map(p => p.render())
window.requestAnimationFrame(render)
}
updateShape()
setInterval(() => {
lastShape = shape
shape = null
particles.map(p => p.nudge())
//setTimeout(() => {
updateShape()
//}, 800)
}, 3400)
for(let i = 0; i < 3000; i++){
let p = new particle()
}
render()
window.addEventListener('resize', () => {
width = canvas.width = window.innerWidth
height = canvas.height = window.innerHeight
halfWidth = width / 2
halfHeight = height / 2
scale = Math.min(width, height)
})
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