Smoke Particles

index.html

<canvas id="canvas"></canvas>
<img src="data:image/png;base64,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"/>

script.js

(function () {
  var requestAnimationFrame = window.requestAnimationFrame || window.mozRequestAnimationFrame || window.webkitRequestAnimationFrame || window.msRequestAnimationFrame;
  window.requestAnimationFrame = requestAnimationFrame;
})();

var canvas = document.getElementById("canvas"),
    ctx = canvas.getContext("2d"),
    settings = {
      color: {
        r: 255,
        g: 255,
        b: 255
      }
    },
    loading = true;

canvas.height = document.body.offsetHeight;
canvas.width = document.body.clientWidth;

var parts = [],
    minSpawnTime = 10,
    lastTime = new Date().getTime(),
    maxLifeTime = Math.min(5000, (canvas.height / (1.5 * 60) * 1000)),
    emitterX = canvas.width / 2,
    emitterY = canvas.height - 10,
    smokeImage = new Image();

function spawn() {
  if (new Date().getTime() > lastTime + minSpawnTime) {
    lastTime = new Date().getTime();
    parts.push(new smoke(emitterX, emitterY));
  }
}

function render() {
  if(loading){
    load();
    return false;
  }
  
  var len = parts.length;
  ctx.clearRect(0, 0, canvas.width, canvas.height);
  
  while (len--) {
    if (parts[len].y < 0 || parts[len].lifeTime > maxLifeTime) {
      parts.splice(len, 1);
    } else {
      parts[len].update();
      
      ctx.save();
      var offsetX = -parts[len].size / 2,
          offsetY = -parts[len].size / 2;
      
      ctx.translate(parts[len].x - offsetX, parts[len].y - offsetY);
      ctx.rotate(parts[len].angle / 180 * Math.PI);
      ctx.globalAlpha = parts[len].alpha;
      ctx.drawImage(smokeImage, offsetX, offsetY, parts[len].size, parts[len].size);
      ctx.restore();
    }
  }
  spawn();
  requestAnimationFrame(render);
}

function smoke(x, y, index) {
  this.x = x;
  this.y = y;
  
  this.size = 1;
  this.startSize = 32;
  this.endSize = 80;
  
  this.angle = Math.random() * 359;
  
  this.startLife = new Date().getTime();
  this.lifeTime = 0;
  
  this.velY = -1 - (Math.random() * 0.5);
  this.velX = Math.floor(Math.random() * (-6) + 3)/2;
}

smoke.prototype.update = function () {
  this.lifeTime = new Date().getTime() - this.startLife;
  this.angle += 0.2;
  
  var lifePerc = ((this.lifeTime / maxLifeTime) * 100);
  
  this.size = this.startSize + ((this.endSize - this.startSize) * lifePerc * .1);
  
  this.alpha = 1 - (lifePerc * .01);
  this.alpha = Math.max(this.alpha, 0);
  
  this.x += this.velX;
  this.y += this.velY;
}

smokeImage.src = document.getElementsByTagName("img")[0].src;
smokeImage.onload = function(){
  loading = false; 
}

function load(){
  if(loading){
    setTimeout(load, 100); 
  }else{
    render(); 
  }
}

render();

// save off the original image for colorizing
var origImage = smokeImage;

window.onresize = resizeMe;
window.onload = resizeMe;

function resizeMe() {
  canvas.height = document.body.offsetHeight;
}

function changeColor() {
  var tCanvas = document.createElement("canvas"),
      tCtx = tCanvas.getContext("2d"),
      color = settings.color;
  
  tCanvas.width = tCanvas.height = 32;
  tCtx.drawImage(origImage, 0, 0, 32, 32);
  
  var imgd = tCtx.getImageData(0, 0, 32, 32),
      pix = imgd.data;
  
  for (var i = 0, n = pix.length; i < n; i += 4) {
    pix[i] = color.r 
    pix[i + 1] = color.g;
    pix[i + 2] = color.b;
  }
  
  tCtx.putImageData(imgd, 0, 0);
  return tCanvas.toDataURL();
}

// Settings
var gui = new dat.GUI();
var colorController = gui.addColor(settings, 'color').onChange(function () {
  smokeImage.src = changeColor();
});

scripts

<script src="https://cdnjs.cloudflare.com/ajax/libs/dat-gui/0.5/dat.gui.min.js"></script>

smoke-particles.markdown

Smoke Particles

just a really quick demo for fun.

A Pen by Loktar on CodePen.

License.

style.css

body, html {
    background-color: #000;
    color: #fff;
    width: 100%;
    height: 100%;
    margin: 0;
    padding: 0;
    overflow: hidden;
}
canvas {
    position:absolute;
}

img{display:none;}