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Pen Settings

CSS Base

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Add External Stylesheets/Pens

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

            
              <canvas></canvas>
<nav>
  <p>blue</p>
  <p>green</p>
  <p>orange</p>
  <p>pink</p>
</nav>
<footer>eeottati.com</footer>
            
          
!
            
              @import url('https://fonts.googleapis.com/css?family=Montserrat');

body {
  background: #212121;
  font-family: 'montserrat'
}

canvas {
  position: fixed;
  top: 0px;
  left: 0px;
  width: 100%;
  height: 100%;
}

nav {
  position: absolute;
  font-size: 20px;
  color: #999999;
  top: 48%;
  left: 50%;
  transform: translate(-50%, -50%);
  
  p {
    display: inline-block;
    margin: 0 10px 0 10px;
    cursor: pointer;
    
    &:nth-child(1) { color: #49FDFE; }
    &:nth-child(2) { color: #C7F202; }
    &:nth-child(3) { color: #FFAB00; }
    &:nth-child(4) { color: #FF6699; }
    
    &:hover {
      text-decoration: underline;
    }
  }
}

footer {
  position: fixed;
  color: #999999;
  font-size: 13px;
  bottom: 0px;
  right: 0px;
  margin: 15px;
  cursor: pointer;
  
  &:hover {
    color: #FFFFFF;
  }
}
            
          
!
            
              var EEO = EEO || {};

// --------------------------------
// --------------------------------

EEO.Event = function() { this._observers = []; };
EEO.Event.prototype = {

	/*---------------------------------------
    Attach the supplied observer to this Event
  ---------------------------------------*/
  attach: function(argObserver) { this._observers.push(argObserver); },

	/*---------------------------------------
    Notify all observers of this Event
  ---------------------------------------*/
  notify: function(args) {
		for(var i = 0, l = this._observers.length; i < l; i++) {
			this._observers[i](args);
		}
	}
	
};

// --------------------------------
// --------------------------------

EEO.Particle = function(argNext, argX, argY, argSX, argSY, argMovX, argMovY, argAlpha) {
  this.nxt = argNext;
	this.x = argX;
	this.y = argY;
	this.sX = argSX;
	this.sY = argSY;
	this.movX = argMovX;
	this.movY = argMovY;
	this.alpha = argAlpha;
};

// --------------------------------
// --------------------------------

EEO.ParticleController = (function(argParticle) {
  
  // Objects
  var _Particle = argParticle;
  
  // Elements
  var _canvas, _ctx;
  
  // Other vars
  var _nodeListStart, _nodeListEnd, _intWindowWidth, _intWindowHeight, _strColor;
  
  /*---------------------------------------
    Initialize ParticleController
  ---------------------------------------*/
  function init(argCanvas, argParticleCount, argUpdateInterval, argStartColor, argWindowWidth, argWindowHeight) {
    
    // Elements
    _canvas = argCanvas;
    _ctx = _canvas.getContext('2d');
    
    // Node pointers
    _nodeListStart = undefined;
    _nodeListEnd = undefined;
    
    // Initial settings
    _strColor = argStartColor;
    _intWindowWidth = argWindowWidth;
    _intWindowHeight = argWindowHeight;
    
    // Populate, and start
    _populate(argParticleCount);
    setInterval(_update, argUpdateInterval);
  }
  
  /*---------------------------------------
    Populate particles
  ---------------------------------------*/
  function _populate(argParticleCount) {
    
    for(var i = 0; i < argParticleCount; i++) {
      
      var tmpX = _rand(0, _intWindowWidth);
      var tmpY = _rand(0, _intWindowHeight);
      var angle = _rand(0, 360);
      var velocity = _rand(1, 3);
      
      var pNode = new _Particle(undefined, tmpX, tmpY, tmpX, tmpY, 0, 0, velocity * 0.1);
      
      if (_nodeListStart === undefined) _nodeListStart = pNode;
      if (_nodeListEnd === undefined) _nodeListEnd = pNode;
      
      pNode.movX = Math.cos(Math.PI / 180 * angle) * velocity;
      pNode.movY = Math.sin(Math.PI / 180 * angle) * velocity;
      
      _nodeListEnd.nxt = pNode;
      _nodeListEnd = pNode;
      
    }
    
  }
  
  /*---------------------------------------
    Update/run particles
  ---------------------------------------*/
  function _update() {
    
    _ctx.clearRect(0, 0, _intWindowWidth, _intWindowHeight);
    _ctx.fillStyle = _strColor;
    
    var node = _nodeListStart;
    while(node !== undefined) {
      
      if ((node.x < 0) || (node.x > _intWindowWidth) || (node.y < 0) || (node.y > _intWindowHeight)) {
        node.x = node.sX;
        node.y = node.sY;
      }else {
        node.x += node.movX;
        node.y += node.movY;
      }
      
      _ctx.globalAlpha = node.alpha;
      _ctx.fillRect(node.x, node.y, 2, 2);
      
      node = node.nxt;
      
    }

  }
  
  /*---------------------------------------
    Resize canvas
  ---------------------------------------*/
  function resize(argCanvasUpdate, argWindowWidth, argWindowHeight) {
    
    _canvas = argCanvasUpdate;
    _ctx = _canvas.getContext('2d');
    
    _intWindowWidth = _canvas.width = argWindowWidth;
    _intWindowHeight = _canvas.height = argWindowHeight;
    
  }
  
  /*---------------------------------------
    Update particle color
  ---------------------------------------*/
  function updateColor(argColor) {
    _strColor = argColor;
	}
  
  /*---------------------------------------
		Return random integer between argMin & argMax
	---------------------------------------*/
	function _rand(argMin, argMax) {
		return Math.round(Math.random() * (argMax - argMin) + argMin);
	}
  
  return {
    init: init,
    resize: resize,
    updateColor: updateColor
  }
})(EEO.Particle);

// --------------------------------
// --------------------------------

EEO.CanvasView = (function($, argParticleController) {
  
  // Refs
  var _particleController = argParticleController;
  
  // Elements
  var _canvas;
  
  /*---------------------------------------
    Initialize CanvasView
  ---------------------------------------*/
  function init(args) {
    
    // Elements
    _canvas = $('canvas')[0];
    
    // Initialize particle controller
    _particleController.init(
      _canvas,
      args.count,
      args.updateInterval,
      args.startColor,
      $(window).width(),
      $(window).height()
    );
    
    // Initial resize
    resize();
  }
  
  /*---------------------------------------
    Resize canvas
  ---------------------------------------*/
  function resize() {
    _particleController.resize(
      _canvas,
      $(window).width(),
      $(window).height()
    );
  }
  
  /*---------------------------------------
    Update color
  ---------------------------------------*/
  function updateColor(args) {
    _particleController.updateColor(args.color);
	}
  
  return {
    init: init,
    resize: resize,
    updateColor: updateColor
  }
})(jQuery, EEO.ParticleController);

// --------------------------------
// --------------------------------

EEO.NavView = (function($, argEvent) {
  
  // Elements
  var _nav;
  
  // Events
  var e_colorChoice = new argEvent();
  
  /*---------------------------------------
    Initialize NavView
  ---------------------------------------*/
  function init() {
    
    // Elements
    _nav = $('nav p');
    _nav.click(_navClick);
    
  }
  
  /*---------------------------------------
    Nav mouse-click
  ---------------------------------------*/
  function _navClick() {
    e_colorChoice.notify({
      color: $(this).css('color')
    });
  }
  
  return {
    init: init,
    e_colorChoice: e_colorChoice
  }
})(jQuery, EEO.Event);

// --------------------------------
// --------------------------------

EEO.FooterView = (function($) {
  
  // Elements
  var _footer;
  
  /*---------------------------------------
    Initialize FooterView
  ---------------------------------------*/
  function init() {
    
    // Elements
    _footer = $('footer');
    _footer.click(_footerClicked);
  }
  
  /*---------------------------------------
    Footer clicked
  ---------------------------------------*/
  function _footerClicked() {
    window.open("http://www.eeottati.com/");
  }
  
  return {
    init: init
  }
})(jQuery);

// --------------------------------
// --------------------------------

EEO.PenController = (function($, argCanvasView, argNavView, argFooterView) {
  
  // Views
  var _CanvasView = argCanvasView;
  var _NavView = argNavView;
  var _FooterView = argFooterView;
  
  /*---------------------------------------
    Initialize PenController
  ---------------------------------------*/
  function init(args) {
    
    // Initialize views
    _CanvasView.init({
      count:            args.canvasView.particleCount,
      updateInterval:   args.canvasView.updateInterval,
      startColor:       args.canvasView.startColor
    });
    _NavView.init();
    _FooterView.init();
    
    // Bind resize events
    $(window).resize(_CanvasView.resize);
    
    // Bind color change events
    _NavView.e_colorChoice.attach(_CanvasView.updateColor);
    
  }
  
  return {
    init: init
  }
})(jQuery, EEO.CanvasView, EEO.NavView, EEO.FooterView);

// --------------------------------
// --------------------------------

$(function() {
  EEO.PenController.init({
    canvasView: {
      particleCount:    10000,
      updateInterval:   35,
      startColor:       "#49FDFE"
    }
  });
});
            
          
!
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