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              body {
  background-color: #1D1F20;
  overflow: hidden;
  margin: 0
}

#canvas {
  position: absolute;
}
            
          
!
            
              // Click to reset the image with new random variables.
// You can vary the number of circles, vertices, spread, or other basic variables here.
var numberOfCircles = 4;
var numberOfVertices = 40;
var vertexSpread = 3;
var radialVariance = 30;
var radialSpeed = 1;
var angularSpeed = 0.008;
var phiVariance = Math.PI / 6;
var time = 0;

const mainColors = ['#B200A9', '#FF19F2', '#40003C', '#630063'];
const highlightColors = ['#4FFF00', '#37B200', '#184F00', '#184F00', '#103300'];
const canvas = document.createElement('canvas');
const context = canvas.getContext('2d');
canvas.width = window.innerWidth;
canvas.height = window.innerHeight;
document.body.appendChild(canvas);
canvas.addEventListener('click', reset);

class Circle {
  // Phi controls the angle of the circles that are created. Color is currently not used.
  constructor(x, y, radius, color, phi) {
    this.x = x;
    this.y = y;
    this.radius = radius;
    this.initialRadius = radius;
    this.radialVelocity = radialSpeed * Math.random();
    this.maxRadialSpeed = this.radialVelocity;
    this.radialAcceleration = 0;
    this.angularVelocity = angularSpeed * Math.random();
    this.maxAngularSpeed = this.angularVelocity;
    this.angularAcceleration = 0;
    this.color = color;
    this.phi = phi;
    this.initialPhi = phi;
    this.vertices = this.generateVertices();
  }
  
  generateVertices() {
    let vertices = [];
    for(var i = 0; i < numberOfVertices; i++) {
      vertices.push(new Vertex(
        this.x + this.radius * Math.cos(this.phi + i * 2 * Math.PI / numberOfVertices),
        this.y + this.radius * Math.sin(this.phi + i * 2 * Math.PI / numberOfVertices),
        this.phi
      ));
    }
    return vertices;
  }
  
  updateVertices() {
    for(var i = 0; i < numberOfVertices; i++) {
      this.vertices[i].x = this.x + this.radius * Math.cos(this.phi + i * 2 * Math.PI / numberOfVertices);
      this.vertices[i].y = this.y + this.radius * Math.sin(this.phi + i * 2 * Math.PI / numberOfVertices);
      this.vertices[i].phi = this.phi;
    }
  }
  
  updateCircle() {
    if (this.radius > this.initialRadius + radialVariance) {
      this.radialAcceleration = -.02;
      this.radialVelocity += this.radialAcceleration;
    } else if (this.radius < this.initialRadius) {
      this.radialAcceleration = .02;
      this.radialVelocity += this.radialAcceleration;
    }
    if (this.phi > this.initialPhi + phiVariance) {
      this.angularAcceleration = -.0001;
      this.angularVelocity += this.angularAcceleration;
    } else if (this.phi < this.initialPhi) {
      this.angularAcceleration = .0001;
      this.angularVelocity += this.angularAcceleration;
    }
    if (Math.abs(this.radialVelocity) < this.maxRadialSpeed) {
      this.radialVelocity += this.radialAcceleration;
    }
    if (Math.abs(this.AngularVelocity) < this.maxAngularSpeed) {
      this.angularVelocity += this.angularAcceleration;
    }
    this.radius += this.radialVelocity;
    this.phi += this.angularVelocity;
    // this.vertices = this.generateVertices();
    this.updateVertices();
    this.drawCircle();
  }
  
  drawCircle() {
    for (var i = 0; i < numberOfVertices; i++) {
      var v1 = this.vertices[i];
      var v2 = this.vertices[(i + 1) % numberOfVertices];
          
      const gradient = context.createLinearGradient(v1.x, v1.y, v2.x, v2.y);
      gradient.addColorStop(0, mainColors[2]);
      gradient.addColorStop(0.5, mainColors[0]);
      gradient.addColorStop(1, mainColors[2]);
      
      context.beginPath();
      context.lineWidth = .25;
      context.strokeStyle = gradient;
      context.moveTo(v1.x, v1.y);
      context.lineTo(v2.x, v2.y);
      context.stroke();
      context.closePath();
    }
  }
}

class Vertex {
  constructor(x, y, phi) {
    this.x = x;
    this.y = y;
    this.phi = phi;
  }
}

let circles = [];

function start() {
  context.translate(0.5, 0.5);
  addCircles();
  
  window.requestAnimationFrame(draw);
}

function addCircles() {
  var radius = 30 + 80 * Math.random();
  for(var i = 0; i < numberOfCircles; i++) {
    circles.push(new Circle(canvas.width/2, canvas.height/2, radius, mainColors[i % mainColors.length], 0));
    radius += 40 + 80 * Math.random();
  }
}

function draw() {
  context.clearRect(0, 0, canvas.width, canvas.height);
  for (var i = 0; i < numberOfCircles; i++) {
    circles[i].drawCircle();
    circles[i].updateCircle();
    
    if (i != numberOfCircles - 1) {
      drawConnections(circles[i], circles[i+1]);
    }
  }
  
  time++;
  window.requestAnimationFrame(draw);
}

function drawConnections(c1, c2) {
  for (var i = 0; i < numberOfVertices; i++) {
    var v1 = c1.vertices[i];
    
    for (var j = -vertexSpread; j <= vertexSpread; j++) {
      var k = i + j;
      if (k < 0) { k += numberOfVertices; }
      var v2 = c2.vertices[k % numberOfVertices];
      const gradient = context.createLinearGradient(v1.x, v1.y, v2.x, v2.y);
      gradient.addColorStop(0, highlightColors[4]);
      gradient.addColorStop(0.5, highlightColors[1]);
      gradient.addColorStop(1, highlightColors[4]);
      
      context.beginPath();
      context.lineWidth = .5;
      context.strokeStyle = gradient;
      context.moveTo(v1.x, v1.y);
      context.lineTo(v2.x, v2.y);
      context.stroke();
      context.closePath();
    }
  }
}

start();

window.onresize = function() {
  canvas.width = window.innerWidth;
  canvas.height = window.innerHeight;
}

function reset() {
  time = 0;
  circles = [];
  addCircles();
}
            
          
!
999px
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