cssAudio - Activefile-genericCSS - ActiveGeneric - ActiveHTML - ActiveImage - ActiveJS - ActiveSVG - ActiveText - Activefile-genericVideo - ActiveLovehtmlicon-new-collectionicon-personicon-teamlog-outoctocatpop-outspinnerstartv

Pen Settings

CSS Base

Vendor Prefixing

Add External CSS

These stylesheets will be added in this order and before the code you write in the CSS editor. You can also add another Pen here, and it will pull the CSS from it. Try typing "font" or "ribbon" below.

Quick-add: + add another resource

Add External JavaScript

These scripts will run in this order and before the code in the JavaScript editor. You can also link to another Pen here, and it will run the JavaScript from it. Also try typing the name of any popular library.

Quick-add: + add another resource

Code Indentation

     

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.

            
                <head><meta charset="utf-8">
    <title>Virus</title>
  </head>

  <body>
    <div class="wrapper">
      <canvas id="mycanvas"></canvas>
    </div>

    <script src="https://d28qoto45d39ov.cloudfront.net/datastorm/visualisations/virus/js/d3.min.js"></script>
    <script src="https://d28qoto45d39ov.cloudfront.net/datastorm/visualisations/virus/js/lodash.min.js"></script>
    <script src="https://d28qoto45d39ov.cloudfront.net/datastorm/visualisations/virus/js/requestanimframe.js"></script>
    <script src="https://d28qoto45d39ov.cloudfront.net/datastorm/visualisations/virus/js/datastorm-canvas.js"></script>

  </body>
            
          
!
            
              html, body, .wrapper, svg {
  width: 100%;
  height: 100%;
  background-color: black;
}

            
          
!
            
              "use strict";
var datastorm = datastorm || {};

datastorm.virus = (function(){
  var my = {};

  var elements = {};

  var width, height;
  var active = true;

  var config = {};

  var nodes = [], links = [];

  var force = d3.layout.force()
    .charge(-800)
    .linkDistance(50)
    .linkStrength(function(d) {
      return d.strength;
    })
    .gravity(0.01)
    .friction(0.1);

  var timer;

  var ctx = datastorm.canvas.ctx;

  function init() {

    d3.select('canvas')
      .attr('width', config.width)
      .attr('height', config.height);

    force.size([config.width, config.height]);
  }




  function forceEnd() {
    // updatePositions();
    // updateNetwork();
  }

  function updateNetwork() {

    // Clone, otherwise adding nodes whilst iterating is not clever :)
    nodes = _.clone(datastorm.virus.sim.getUsers());
    links = _.clone(datastorm.virus.sim.getLinks());

    force.nodes(nodes)
      .links(links)
      .start();
  }

  function render() {
    ctx.globalAlpha = 1;

    ctx.fillStyle = "rgba(0, 0, 0, 0.6)";
    ctx.fillRect(0, 0, config.width, config.height);



    ctx.globalAlpha = 0.5;

    // Links
    ctx.strokeStyle = 'rgba(200, 200, 255, 0.7)';
    ctx.lineWidth = 0.5;

    _.each(links, function(d) {
      datastorm.canvas.drawLine(d.source.x, d.source.y, d.target.x, d.target.y);
    });

    // // Nodes
    // console.log('render', nodes.length);
    ctx.fillStyle = 'rgba(200,200,255,1)';
    _.each(nodes, function(d) {
      // console.log(d);
      // ctx.fillStyle = colorScale(d.subject * 2);

      var activeMessages = _.filter(d.messages, function(dd) {
        return dd.active;
      });

      var fill = '#ddd';

      var radius = 3;
      if(activeMessages.length > 0) {
        fill = activeMessages[0].color;
        radius = 6;
      }

      ctx.fillStyle = fill;

      datastorm.canvas.drawCircle(d.x, d.y, radius);
    });
  }

  function showMessages() {
    elements.svg
      .select('.nodes')
      .selectAll('circle')
      .each(function(d) {
        var activeMessages = _.filter(d.messages, function(dd) {
          return dd.active;
        });

        var fill = '#ddd';

        if(activeMessages.length > 0)
          fill = activeMessages[0].color;

        d3.select(this)
          .style('fill', fill)
          .attr('r', activeMessages.length > 0 ? 6 : 3);

      });
  }


  my.init = function(conf) {
    _.assign(config, conf);

    init();

  };

  my.start = function() {
    datastorm.virus.sim.start();
    setInterval(render, 100);
  }

  my.stop = function() {
    datastorm.virus.sim.stop();
  };

  my.networkUpdate = function() {
    updateNetwork();
  }

  return my;
}());

"use strict";
var datastorm = datastorm || {};

datastorm.virus.sim = (function(){
  var my = {};

  var timer;
  var users = [], /*messages = [],*/ links = [];
  var messageId = -1;

  var config = {
    addUserProbability: 0.2,
    addMessageProbability: 0.6,
    addFriendProbability: 1,
    repeatMessageProbability: 0.9,
    repeatMessageTimespan: 2000, // timespan (milliseconds) in which a message can be repeated
    maxUsers: 120
  };


  /*-----
  HELPERS
  -----*/
  function shouldDo(probability) {
    // Decide, based on the given probability, whether event should occur
    return Math.random() < probability;
  }

  function randomColor() {
    var color = d3.rgb(Math.random() * 255, Math.random() * 255, Math.random() * 255);
    color = color.toString();
    // console.log(color);
    return color;
  }

  /*----
  EVENTS
  ----*/
  function addUser() {
    if(!shouldDo(config.addUserProbability))
      return;

    if(users.length > config.maxUsers)
      return;

    var newUser = {
      id: users.length,
      chatty: 0.01 + 0.02 * Math.random(), // how often user messages
      friendly: 0.8 + 0.2 * Math.random(), // how likely user is to friend another user
      interesting: Math.random(), // how interesting the user's messages are
      subject: Math.floor(Math.random() * 10), // the user's interest area,
      friends: [],
      messages: [],
      // isMessaging: false,
      // isRepeatedMessage: false,
      // messageTime: null,
      // isRepeatingMessage: false,
      x: 0.5 * config.width + 10 * Math.random(), //TODO
      y: 0.5 * config.height + 10 * Math.random()//TODO
    };

    // console.log(newUser);
    users.push(newUser);
    datastorm.virus.networkUpdate();
  }

  function purgeMessages() {
    var now = Date.now();
    // messages = _.filter(messages, function(message) {
    //   return now - message.time < config.repeatMessageTimespan;
    // });

    _.each(users, function(user) {
      _.each(user.messages, function(m) {
        if(now - m.time > config.repeatMessageTimespan)
          m.active = false;
      });
      // user.messages = _.filter(user.messages, function(m) {
      //   return now - m.time < config.repeatMessageTimespan;
      // });
    });
  }

  function addMessage() {
    // Iterate through each user and make a message

    if(!shouldDo(config.addMessageProbability))
      return;

    _.each(users, function(user) {
      // console.log(user);

      // Throttle message creation (w/out changing globals)
      if(!shouldDo(0.05))
        return;

      if(!shouldDo(user.chatty))
        return;

      var now = Date.now();

      messageId++;

      var message = {
        id: messageId,
        originator: user.id,
        time: now,
        active: true,
        color: randomColor()
      };

      user.messages.push(message);
    });
  }

  function repeatMessage() {
    if(!shouldDo(config.repeatMessageProbability))
      return;

    var now = Date.now();

    _.each(users, function(user) {

      if(!shouldDo(4 * user.chatty))  // 4 times more likely to repeat a message?
        return;

      // console.log("looking at friends")

      // Go through each friend
      _.each(user.friends, function(friend) {

        // console.log('checking friend')

        if(!shouldDo(friend.interesting))
          return;

        // Go through each of friend's messages
        _.each(friend.messages, function(m) {

          if(!m.active)
            return;

          // console.log('checking messages')

          // check user hasn't already sent this one!
          var hasAlreadySent = false;
          _.each(user.messages, function(mm) {
            if(mm.id === m.id)
              hasAlreadySent = true;
          });
          if(hasAlreadySent)
            return;

          var reMessage = {
            id: m.id,
            originator: m.originator,
            time: now,
            color: m.color,
            active: true
          }
          user.messages.push(reMessage);

          // console.log('remessage!')
        });

      })
    });    
  }

  function addFriend() {
    if(!shouldDo(config.addFriendProbability))
      return;

    _.each(users, function(thisUser) {
      _.each(users, function(otherUser) {
        if(thisUser === otherUser)
          return;

        var probability = otherUser.chatty * thisUser.friendly * otherUser.interesting;

        // if(!shouldDo(otherUser.chatty))
        //   return;

        // if(!shouldDo(thisUser.friendly))
        //   return;

        // if(!shouldDo(otherUser.interesting))
        //   return;

        if(thisUser.subject !== otherUser.subject)
          probability *= 0.002;

        if(!shouldDo(probability))
          return;

        var alreadyFriends = _.find(thisUser.friends, function(friend) {
          return friend.id === otherUser.id;
        });
        if(alreadyFriends)
          return;

        // I don't think we have to do this reverse check...
        alreadyFriends = _.find(otherUser.friends, function(friend) {
          return friend.id === thisUser.id;
        });
        if(alreadyFriends)
          return;

        var strength = thisUser.subject === otherUser.subject ? 0.05 : 0.03;

        links.push({
          source: thisUser.id,
          target: otherUser.id,
          strength: strength
        });

        thisUser.friends.push(otherUser);
        otherUser.friends.push(thisUser);

        datastorm.virus.networkUpdate();


      });
    });
  }


  function update() {
    addUser();
    purgeMessages();
    addMessage();
    repeatMessage();
    addFriend();

    // console.log(users, messages, links);
  }

  my.init = function(conf) {
    _.assign(config, conf);
  };

  my.start = function() {
    timer = setInterval(update, 100);
  }

  my.stop = function() {
    clearInterval(timer);
  }

  my.getUsers = function() {
    return users;
  }

  my.getMessages = function() {
    return messages;
  }

  my.getLinks = function() {
    return links;
  }

  return my;
}());

(function(){

  var wrapper = d3.select('.wrapper');
  var width = wrapper.node().clientWidth;
  var height = wrapper.node().clientHeight;

  datastorm.virus.sim.init({
    width: width,
    height: height
  });
  datastorm.virus.init({
    width: width,
    height: height
  });

  datastorm.virus.start();

})();
            
          
!
999px
Loading ..................

Console