cssAudio - Activefile-genericCSS - ActiveGeneric - ActiveHTML - ActiveImage - ActiveJS - ActiveSVG - ActiveText - Activefile-genericVideo - Activehtmlicon-personicon-teamoctocatpop-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.

            
              <svg viewBox="0 0 550 400" preserveAspectRatio="xMidYMax meet">
  <g id="stems" fill="none" stroke="green"></g>
  <g id="leaves"></g>
</svg>
<br />
<button id="create">Create</button>

            
          
!
            
              body {
  background: #eee;
}

* {
  box-sizing: border-box;
}

svg {
  width: 100%;
  height: 100%;  
  position: absolute;
}

button {
  position: absolute;
  top: 15px;
  left: 15px;
  
  background: yellowgreen;
  border: 1px solid rgba(0,0,0,0.2);
  padding: 10px 16px;
  font-weight: bold;  
  color: #222;
  transition: all 0.1s;
  box-shadow: 0 1px 4px 0 rgba(0, 0, 0, 0.37);
  
  &:focus {
    outline: none;
  }
  
  &:hover {
    border: 1px solid rgba(0,0,0,0.5);
    color: black;
  }
}
            
          
!
            
              // Based on the stem generator in Flash Math Creativity

class EventManager {

  constructor() {      
    this.eventLookup = {};
  }

  off(event, callback) {
    var listeners = this.eventLookup[event];                
    if (event === "*") this.eventLookup = {}; 
    else if(!callback) this.eventLookup[event] = []; 
    else _.remove(listeners, { callback });
  }

  on(event, callback, scope) {
    var listeners = this.eventLookup[event];
    if (!listeners) this.eventLookup[event] = listeners = [];  
    listeners.push({ callback, scope });      
    return () => _.remove(listeners, { callback });
  }

  once(event, callback, scope) {      
    var on = (...data) => {
      this.off(event, on);
      callback.apply(scope, data);
    };
    return this.on(event, on);
  }

  fire(event, ...data) {
    var listeners = this.eventLookup[event];
    if (!listeners) return;
    listeners.forEach(list => {
      try {
        return list.callback.apply(list.scope, data);
      } catch(e) {
        return _.isError(e) ? e : new Error(e);
      }
    });      
  }
}

var events = new EventManager();

var ns = "http://www.w3.org/2000/svg";
var d  = "M0,0 Q5,-5 10,0 5,5 0,0z";

var stems  = $("#stems");
var leaves = $("#leaves");
var svg    = $("svg");

var leafCount = 30;
var plants    = 10;
var centerX   = 275;
var offsetX   = 175;

$("#create").on("click", generate);

generate();

function generate() {
  
  leaves.empty();
  stems.empty();
      
  _.times(plants, createPlant);
    
  stems.children().each(function() {
    
    var tween = TweenMax.to(this, _.random(2, 4, true), {
      drawSVG: true,    
      delay: _.random(2, true),
      onStart: () => TweenLite.set(this, { opacity: 1 }),
      onUpdate: () => events.fire(this.id, tween.progress())      
    });
  });  
}

function createPlant() {
    
  var points = createPoints();
  var stem   = createPath(stems);
  var length = points.length;  
  var values = points.map(point => `${point.x},${point.y}`);
  var height = points[length - 1].y;   
  var id     = _.uniqueId("grow");   
  var coords = [];
  
  for (var i = 0; i < length; i++) {
    var point = points[i];
    coords.push(point.x, point.y);
  }
  
  TweenLite.set(stem, {     
    opacity: 0,
    drawSVG: 0,
    //attr: { id, d: `M${values.join(" ")}` }
    attr: { id, d: solve(coords) }
  });
  
  for (var i = 0; i < leafCount; i++) {
    var point = points[length - 1 - i];    
    var scale = {
      x: 1 + 0.1  * i,
      y: 1 + 0.05 * i
    };
    createLeaf(point, scale, height, id);
  }    
}

function createLeaf(point, scale, height, grow) {
  
  var leaf  = createPath(leaves);   
  var start = height / point.y;  
  var off   = events.on(grow, growLeaf);
  
  function growLeaf(growth) {
    
    if (growth >= start) {
      
      // Remove listener
      off();
      
      TweenLite.set(leaf, {
        x: point.x,
        y: point.y,
        scaleX: scale.x,
        scaleY: scale.y,
        rotation: _.random(180) - 180,
        fill: `rgb(0,${_.random(110, 160)},0)`,
        attr: { d }        
      });
      
      TweenLite.from(leaf, 1, { scale: 0 });
    }
  }              
}

function createPoints() {
  
  var x = _.random(centerX - offsetX, centerX + offsetX);
  var y = 400;
  var dy = 5;  
  var offset = 0.007;
  var count  = _.random(30, 55);
  var points = [{ x, y }];
    
  for (var i = 1; i <= count; i++) {
    points.push({
      x: points[i - 1].x + i * offset * (_.random(21) - 10),
      y: 395 - dy * i
    });
  }
  return points;
}

function createPath(parent) {
  return $(document.createElementNS(ns, "path")).appendTo(parent);
}

function solve(data) {

  var size = data.length;
  var last = size - 4;    

  var path = "M" + [data[0], data[1]];

  for (var i = 0; i < size - 2; i +=2) {

    var x0 = i ? data[i - 2] : data[0];
    var y0 = i ? data[i - 1] : data[1];

    var x1 = data[i + 0];
    var y1 = data[i + 1];

    var x2 = data[i + 2];
    var y2 = data[i + 3];

    var x3 = i !== last ? data[i + 4] : x2;
    var y3 = i !== last ? data[i + 5] : y2;

    var cp1x = (-x0 + 6 * x1 + x2) / 6;
    var cp1y = (-y0 + 6 * y1 + y2) / 6;

    var cp2x = (x1 + 6 * x2 - x3) / 6;
    var cp2y = (y1 + 6 * y2 - y3) / 6;
   
    path += "C" + [cp1x, cp1y, cp2x, cp2y, x2, y2];
  } 

  return path;
}




            
          
!
999px
Close

Asset uploading is a PRO feature.

As a PRO member, you can drag-and-drop upload files here to use as resources. Images, Libraries, JSON data... anything you want. You can even edit them anytime, like any other code on CodePen.

Go PRO

Loading ..................

Console