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

              
                <div class="title">
    <h1>JUST DO IT.</h1>
  </div>
  <div class="more-pens">
    <a target="_blank" href="https://codepen.io/plasm/" class="white-mode">VIEW OTHER PENS</a>
    <a target="_blank" href="https://codepen.io/collection/nZpPbz/" class="white-mode">VIEW OTHER PARTICLES</a>
  </div>
              
            
!

CSS

              
                @import url('https://fonts.googleapis.com/css?family=Montserrat:200,300,400,600')
@import url('https://fonts.googleapis.com/css?family=Open+Sans+Condensed:700')

.more-pens
  position: fixed
  left: 20px
  bottom: 20px
  z-index: 10
  font-family: "Montserrat"
  font-size: 12px

a.white-mode, a.white-mode:link, a.white-mode:visited, a.white-mode:active
  font-family: "Montserrat"
  font-size: 12px
  text-decoration: none
  background: #212121
  padding: 4px 8px
  color: #f7f7f7
  &:hover
    background: #edf3f8
    color: #212121

body
  margin: 0
  padding: 0
  overflow: hidden
  width: 100%
  height: 100%
  background: #010101


.title
  z-index: 10
  position: absolute
  left: 50%
  top: 50%
  transform: translateX(-50%) translateY(-50%)
  font-family: "Montserrat"
  text-align: center
  padding-top: 260px
  width: 100%

  h1
    font-family: 'Open Sans Condensed', sans-serif
    font-size: 46px
    text-transform: uppercase
    line-height: 1.1
    font-weight: 700
    padding: 0
    margin: -120px 0 0 0
    color: #FFFFFF
    letter-spacing: -.02em

              
            
!

JS

              
                function drawCircleGrey(ctx, radius, position){
  ctx.beginPath();
  ctx.arc(position.x, position.y, radius, 0, 2 * Math.PI, false);
  ctx.fillStyle   = hexToRGB("#FFFFFF", Math.random()*0.4);
  ctx.fill()
}

function colorLuminance(hex, lum) {
  // validate hex string
  hex = String(hex).replace(/[^0-9a-f]/gi, '');
  if (hex.length < 6) {
    hex = hex[0]+hex[0]+hex[1]+hex[1]+hex[2]+hex[2];
  }
  lum = lum || 0;

  // convert to decimal and change luminosity
  let rgb = "#", c, i;
  for (i = 0; i < 3; i++) {
    c = parseInt(hex.substr(i*2,2), 16);
    c = Math.round(Math.min(Math.max(0, c + (c * lum)), 255)).toString(16);
    rgb += ("00"+c).substr(c.length);
  }
  return rgb;
}

function hexToRGB(hex, alpha) {
    let r = parseInt(hex.slice(1, 3), 16),
        g = parseInt(hex.slice(3, 5), 16),
        b = parseInt(hex.slice(5, 7), 16);

    if (alpha) {
        return "rgba(" + r + ", " + g + ", " + b + ", " + alpha + ")";
    } else {
        return "rgb(" + r + ", " + g + ", " + b + ")";
    }
}


function pointIsInPolygon(p, polygon) {
    let isInside = false;
    let minX = polygon[0].x, maxX = polygon[0].x;
    let minY = polygon[0].y, maxY = polygon[0].y;
    for (let n = 1; n < polygon.length; n++) {
        let q = polygon[n];
        minX = Math.min(q.x, minX);
        maxX = Math.max(q.x, maxX);
        minY = Math.min(q.y, minY);
        maxY = Math.max(q.y, maxY);
    }
    if (p.x < minX || p.x > maxX || p.y < minY || p.y > maxY) {
        return false;
    }
    let i = 0, j = polygon.length - 1;
    for (i, j; i < polygon.length; j = i++) {
        if ( (polygon[i].y > p.y) != (polygon[j].y > p.y) &&
                p.x < (polygon[j].x - polygon[i].x) * (p.y - polygon[i].y) / (polygon[j].y - polygon[i].y) + polygon[i].x ) {
            isInside = !isInside;
        }
    }
    return isInside;
}


function getBoundingBoxPolygon(points){
  let minX = null;
  let maxX = null;
  let minY = null;
  let maxY = null;
  for(let i = 0; i < points.length; i++) {
      let x = points[i].x;
      let y = points[i].y;
      if(minX == null){
        minX = x; maxX = x; minY = y; maxY = y;
      }
      minX = Math.min(minX, x);
      maxX = Math.max(maxX, x);
      minY = Math.min(minY, y);
      maxY = Math.max(maxY, y);
  }

  let width  = maxX - minX;
  let height = maxY - minY;

  return {
    x: minX,
    y: minY,
    width: width,
    height: height,
  }
}

function polygonScale(factor, polygon){
  return polygon.map(function(data) {
   data.x = data.x * factor
   data.y = data.y * factor
   return data;
  });
}

function addParticle(){
  // Externa points
  let vector = {
    x: Math.random()*logoBB.width,
    y: Math.random()*logoBB.height
  }

  if(pointIsInPolygon(vector, logo)){
    drawCircleGrey(canvas, Math.random()*2, {
      x: offsetX + vector.x,
      y: offsetY + vector.y - 80
    })
  }
}

//
let WIDTH  = $(window).width()
let HEIGHT = $(window).height()

let logo  = polygonScale(0.4, [{x: 120.7,y: 0}, {x: 67.3,y: 61.7}, {x: 32,y: 111.7}, {x: 12.7,y: 152.3}, {x: 4,y: 185.7}, {x: 0.7,y: 207}, {x: 4.7,y: 235}, {x: 10.7,y: 250.3}, {x: 25.3,y: 271}, {x: 46.7,y: 286.3}, {x: 72.7,y: 294.3}, {x: 98.7,y: 297.4}, {x: 130.7,y: 294.3}, {x: 176,y: 284.3}, {x: 248,y: 256.3}, {x: 834.3,y: 5.7}, {x: 218.7,y: 169}, {x: 182,y: 173.7}, {x: 150,y: 171.7}, {x: 122.7,y: 161.7}, {x: 104,y: 143.7}, {x: 94.7,y: 127.7}, {x: 90,y: 101.7}, {x: 92,y: 71.7}, {x: 102,y: 39}]);

let tela = document.createElement('canvas');
    tela.width = $(window).width();
    tela.height = $(window).height();
    $("body").append(tela);

let canvas = tela.getContext('2d');

let logoBB = getBoundingBoxPolygon(logo)

let offsetX = WIDTH/2 - (logoBB.width)/2
let offsetY = HEIGHT/2 - (logoBB.height)/2

setInterval(function(){
  for(let i=0;i<100;i++){
    addParticle()
  }
}, 5)
              
            
!
999px

Console