Pen Settings

HTML

CSS

CSS Base

Vendor Prefixing

Add External Stylesheets/Pens

Any URL's added here will be added as <link>s in order, and before the CSS in the editor. If you link to another Pen, it will include the CSS from that Pen. If the preprocessor matches, it will attempt to combine them before processing.

+ add another resource

JavaScript

Babel is required to process package imports. If you need a different preprocessor remove all packages first.

Add External Scripts/Pens

Any URL's added here will be added as <script>s in order, and run before the JavaScript in the editor. You can use the URL of any other Pen and it will include the JavaScript from that Pen.

+ add another resource

Behavior

Save Automatically?

If active, Pens will autosave every 30 seconds after being saved once.

Auto-Updating Preview

If enabled, the preview panel updates automatically as you code. If disabled, use the "Run" button to update.

Format on Save

If enabled, your code will be formatted when you actively save your Pen. Note: your code becomes un-folded during formatting.

Editor Settings

Code Indentation

Want to change your Syntax Highlighting theme, Fonts and more?

Visit your global Editor Settings.

HTML

              
                <canvas id="c"></canvas>

<footer> 
  <h3>Made with <i class='fa fa-heart' ></i> by <a href="http://www.velasquezdaniel.com" target='_blank'>Daniel Velasquez</a>
</footer>
  
<!--   No longer used controls
<div id='controls'> 
  <div id='c-mouse' class='cc'>
    <div class='header'>
      <h3 class='header-title'>Mouse</h3>
      <h3 class='header-value' id='mouse-value'>200</h3>
    </div>
    <input type="range" min="50" max="600" value="400" class="slider" id="mouse">
  </div>
  <div id='c-speed' class='cc'>
    <div class='header'>
      <h3 class='header-title'>Speed</h3>
      <h3 class='header-value' id='speed-value'>53</h3>
    </div>
    <input type="range" min="1" max="30" value="30" class="slider" id="speed">
  </div>
  <div id='c-lines' class='cc'>
    <div class='header'>
      <h3 class='header-title'>Lines</h3>
      <h3 class='header-value' id='lines-value'>53</h3>
    </div>
    <input type="range" min="2" max="20" value="6" class="slider" id="lines">
    
  </div>
  <div id='c-points' class='cc'>
    <div class='header'>
      <h3 class='header-title'>Points<i class="fa fa-question-circle info"><h4 class='info-puf'>Every line is formed by many points.<br />The more points you have, the more bents the line can have.</h4></i></h3>
      <h3 class='header-value' id='points-value'>53</h3>
    </div>
    <input type="range" min="3" max="100" value="50" class="slider" id="points">
    
  </div>
  <div id='c-padding' class='cc'>
    <div class='header'>
      <h3 class='header-title'>padding</h3>
      <h3 class='header-value' id='padding-value'>53</h3>
    </div>
    <input type="range" min="5" max="45" value="5" class="slider" id="padding">
  </div>
  <div class='debug cc'>
  <div id='debug-fps' class='debug-item'>
    <div class='header'>
      <h3 class='header-title'>FPS</h3>
    </div>
    <input type="checkbox" name="fps" value="fps" id='debug-fps' class='check'>
  </div>
  <div id='c-debug-points' class='debug-item'>
    <div class='header'>
      <h3 class='header-title'>Points</h3>
    </div>
  <input type="checkbox" name="points" value="points" id='debug-points' class='check'>
    
  </div>
  </div>
</div> -->

              
            
!

CSS

              
                * {
  box-sizing: border-box;
}
html {
  font-size: 12px;
}
body, html {
  width: 100%;
  height: 100%;
  overflow: hidden;
  padding: 0;
  margin: 0;
  position: relative;
}
footer {
  position: absolute;
  width: 100%;
  bottom: 0px;
  display: flex;
  align-items: center;
  justify-content: center;
  a, i {
    color: #ff5050;
    text-decoration: none;
  }
  a:hover {
    color: red;
  }
  h3 {
    font-size: 1.25rem;
    letter-spacing: 0.05em;
    font-weight: 400;
    color: white;
    margin: 0;
    padding: 0.75em 1.5em;
    background: rgba(10,9,14,0.8);
    border-radius: 2px;
  }
}
.cc {
  width: 100%;
  padding: 0 20px;
}
#controls {
  position: absolute;
  right: 0;
  top: 0;
  background: rgba(10,9,14,0.8);
  box-shadow: 0 2px 4px rgba(0,0,0,0.4);
  min-width: 200px;
  max-height: 100vh;
  border-radius: 2px;
  padding: 20px 0;
  & > div {
    margin-bottom: 20px;
  }
  & > div:last-of-type {
    margin-bottom: 0px;
    width: 100%;
  }
}
.slider {
  width: 100%;
  height: 25px;
  -webkit-appearance: none;
  background: #d3d3d3;
  outline: none;
  opacity: 0.7;
  -webkit-transition: .2s;
  transition: opacity .2s;
}
.slider:hover {
    opacity: 1;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 25px;
    height: 25px;
    background: #ff5050;
    cursor: pointer;
}
.slider::-moz-range-thumb {
    width: 25px;
    height: 25px;
    background: #4CAF50;
    cursor: pointer;
}
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 10px;
  &-title, &-value {
    position: relative;
    display: inline-block;
    float: left;
    margin: 0;
    color: white;
    font-weight: 400;
    letter-spacing: 0.1em;
    text-transform: capitalize;
  }
  &-value {
    font-weight: 200;
    text-align: right;
  }
}
.debug {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: row;
  &-item {
    width: 50%;
    text-align: center;
    & .header {
      margin-bottom: 10px;
      &-title {
        width: 100%;
      }
    }
  }
}
.check {
  width: 20px;
  height: 20px;
  &:hover {
    cursor: pointer;
    
  }
}

.info {
  position: relative;
  left: 5px;
  &-puf {
    opacity: 0;
    font-family: sans-serif;
    position: absolute;
    line-height: 1.6em;
    top: -30px;
    right: calc(100% + 15px);
    margin: 0;
    white-space: nowrap;
    background: #282828;
    border-radius: 2px;
    z-index: 50;
    padding: 0.5em 2em;
    text-transform: none;
    transition: all 0.2s ease-in-out;
    user-select: none;
    pointer-events: none;
    font-weight: 400;
  }
  &:hover {
    cursor: pointer;
    
  }
  &:hover &-puf {
    opacity: 1;
    user-select: none;
    pointer-events: none;
  }
}

@media screen and (min-width: 800px){
  html {
    font-size: 12px;
  }
}
@media screen and (min-width: 1200px){
}
              
            
!

JS

              
                let canvas = document.getElementById('c');
const ctx = canvas.getContext('2d');
var W = window.innerWidth;
var H = window.innerHeight;
canvas.width = W;
canvas.height = H;


// Helper Functions
// Get number in the middle
function mid(){
  const args = Array.from(arguments);
  if(args.length < 3) return args[0] || 0;
  const sorted = args.slice().sort((a,b)=> a - b);
  return sorted[Math.round((sorted.length - 1) / 2)];
}
// Phytagoshananigans theory
const PY = (x,y) => Math.sqrt(Math.pow(Math.abs(x),2) + Math.pow(Math.abs(y),2),2); 
// Fps calculator
const fpsHelper = function(onSecond){
  let lastSec = Date.now();
  let frames = 0;
  let fps = 0;
  return {
    onFrame: ()=>{
      if(((Date.now() - lastSec) / 1000) > 1) {
        lastSec = Date.now();
        fps = frames;
        frames = 0;
        if(onSecond)
        onSecond(fps);
      } else {
        frames += 1;
      }
    },
    getFPS: () => {
      return fps;
    }
  }
}
// Initialization
const mouse = {
  x: W / 2,
  y: H / 2
}
// pading is in percentage
const config = {
  nPoints: 20,
  nLines: 20,
  radius: 100,
  padding: 40,
  showFPS: false,
  showPoints: false,
  maxSpeed: 30,
}
window.onload = function(){
var gui = new dat.GUI({ closed: true, name:"config" });
gui.add(config,"nPoints",3,50).step(1).onFinishChange(function(val){
  debouncedInit();
});
gui.add(config,"nLines",3,50).step(1).onFinishChange(function(val){
  console.log('finish',val,config)
  debouncedInit();
});;
gui.add(config,"radius",50,300).step(1);
gui.add(config,"padding",5,45).step(1).onFinishChange(function(val){
  console.log(val)
  debouncedUpdateX();
});
gui.add(config,"showFPS");
gui.add(config,"showPoints");
gui.add(config,"maxSpeed", 5, 100);

  
}
let pointsPerLine = 20;
let linesInScreen = 20;
let lines = [];
let homesX = [];
let homesY = [];
let padding = 40;
let max = 30;
let radius = 200;
let fpsObj = fpsHelper();
let debug = {
  fps: false,
  dots: false,
};

let rAF = null;

// Actual Code 
// Update Line's dots Position
function updateLine(line,homeX){
  let point, desiredX, desiredY, desiredH, desiredForce, desiredAngle, hvx, hvy, mvx, mvy, x, y, homeY, vx, vy;
  let radius = config.radius;
  let maxSpeed = config.maxSpeed;
  for(var j = line.length - 1; j >= 0; j--){
    point = line[j];
    x = point.x;
    y = point.y;
    hvx = 0, hvy = 0;
    // Home forces
    homeY = homesY[j];
    if(x !== homeX || y !== homeY) {
      desiredX = homeX - x;
      desiredY = homeY - y;
      desiredH = PY(desiredX,desiredY);
      desiredForce = Math.max(desiredH * 0.2,1);
      desiredAngle = Math.atan2(desiredY,desiredX);
      hvx = desiredForce * Math.cos(desiredAngle);
      hvy = desiredForce * Math.sin(desiredAngle);
    }
    // Mouse Forces
    mvx = 0, mvy = 0;
    desiredX = x - mouse.x;
    desiredY = y - mouse.y;
    if(!(desiredX > radius || desiredY > radius || desiredY < -radius || desiredX < -radius)) {
    desiredAngle = Math.atan2(desiredY,desiredX);
    desiredH = PY(desiredX,desiredY);
    desiredForce =  Math.max(0,Math.min(radius - desiredH,radius));
    mvx = desiredForce * Math.cos(desiredAngle);
    mvy = desiredForce * Math.sin(desiredAngle);
    }
    // Combine and limit
    vx = Math.round(mid((mvx + hvx) * 0.9, maxSpeed, -maxSpeed));
    vy = Math.round(mid((mvy + hvy) * 0.9, maxSpeed, -maxSpeed));
    
    // Dont let point get too far from home
    
    if(vx != 0) {
      point.x += vx;
    }
    if(vy != 0){
      point.y += vy;
    }
    line[j] = point;
  }
  
  return line;
}
function timer(){
  ctx.clearRect(0,0,W,H);
  if(config.showFPS){
     fpsObj.onFrame();
      ctx.fillStyle = '#282828';
      ctx.textAlign="start"; 
      ctx.textBaseline="top"; 
     ctx.font="50px Helvetica";
     ctx.fillText(fpsObj.getFPS(),50,50);
  }
  let line, xc,yc, cur, curX, curY, next, dot;
  for(var i = lines.length - 1; i >= 0; i--){
    // Update before rendering
    line = updateLine(lines[i],homesX[i]);
    lines[i] = line;
    ctx.beginPath();
    ctx.strokeStyle = '#d2d2d2';
    ctx.moveTo(line[line.length - 1].x,line[line.length - 1].y);
    for(var j = line.length - 2; j > 1; j--){
      cur  = line[j];
      curX = cur.x;
      curY = cur.y;
      next = line[j - 1];
      xc = (curX + next.x) / 2;
      yc = (curY + next.y) / 2;
      // ctx.bezierCurveTo(curX,curY,xc,yc,xc,yc);
      // ctx.bezierCurveTo(xc,yc,xc,yc,next.x,next.y);
      // ctx.bezierCurveTo(curX,curY,curX,curY,next.x,next.y);
      // ctx.bezierCurveTo(curX,curY,curX,curY,xc,yc);
      // ctx.bezierCurveTo(curX,curY,xc,yc,next.x,next.y);
      // ctx.bezierCurveTo(xc,yc,xc,yc,curX,curY);
      ctx.quadraticCurveTo(curX,curY,xc,yc);
    }
    // ctx.bezierCurveTo(line[j].x,line[j].y, line[j - 1].x, line[j - 1].y, line[j - 1].x, line[j - 1].y);
    ctx.quadraticCurveTo(line[j].x,line[j].y, line[j - 1].x, line[j - 1].y);
    ctx.stroke();
    if(config.showPoints) {
      for(j = line.length - 1; j >= 0; j--){
        dot =  line[j];
        ctx.beginPath();
        ctx.fillStyle ='red';
        ctx.arc(dot.x, dot.y, 1, 0, 2 * Math.PI);
        ctx.fill();
      }
    }
  
    }
  rAF = requestAnimationFrame(timer)
  
}
function point(x,y){
  return {
    x: x,
    y: y,
    hy: y,
    hx: x,
  }
}
function updateX(){
  let line, calcPad;
  if(rAF) {
    cancelAnimationFrame(rAF);
    rAF = null;
  }
  calcPad = (W * config.padding) / 100;
  homesX = [];
  for(var i = config.nLines; i >= 0; i--){
    x = calcPad + (((W - calcPad * 2) / config.nLines) * i);
    homesX.push(x);
  }
  timer();
}
function init(){
  // Cancel if neededs
  if(rAF) {
    cancelAnimationFrame(rAF);
    rAF = null;
  }
  lines = [];
  homesX = [];
  homesY = [];
  let line = [], y = 0, x = 0;
  let calcPad = (W * config.padding) / 100;
  for(var i = config.nLines; i >= 0; i--){
    line = [];
    // Include padding in calculatio
    x = calcPad + (((W - calcPad * 2) / config.nLines) * i);
    homesX.push(x);
    for(var j = config.nPoints; j >= 0; j--){
      line.push(point(x,Math.round((H / config.nPoints )* j)));
      if(i === 0) {
        homesY.push(Math.round((H / config.nPoints ) * j));
      }
    }
    if(i == 0){
      // homesY.reverse();
    }
    lines.push(line);
  }
  timer();
}

// Input Handles

const debouncedInit = _.debounce(init, 200)
const debouncedUpdateX = _.debounce(updateX, 200)

// Events
window.addEventListener('mousemove',(e)=>{
  mouse.x = e.clientX;
  mouse.y = e.clientY;
});

window.addEventListener('resize', (e) => {
  W = window.innerWidth;
  H = window.innerHeight;
  canvas.width = W;
  canvas.height = H;
  init();
});

init();
              
            
!
999px

Console