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 includes JSX processing.

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

Packages

Add Packages

Search for and use JavaScript packages from npm here. By selecting a package, an import statement will be added to the top of the JavaScript editor for this package.

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

              
                
              
            
!

CSS

              
                body {
  background: yellowgreen;
}
              
            
!

JS

              
                // Asked by @jrf0110
// https://github.com/jonobr1/two.js/issues/120

var two = new Two({
  type: Two.Types.canvas,
  fullscreen: true,
  autostart: true
}).appendTo(document.body);

/** 
 * Create the road, this is the reference for the dashed lines
 */

var amount = 32;
var points = [];

for (var i = 0; i < amount; i++) {

  var pct = i / (amount - 1);
  var theta = Math.PI * 2 * pct;
  var x = two.width / 20 * Math.cos(theta);
  var y = pct * two.height * 2 - two.height * 0.5;

  points.push(new Two.Anchor(x, y));

}

var sidewalk = two.makeCurve(points, true);
sidewalk.translation.set(two.width / 2, two.height/ 2);
sidewalk.noFill().stroke = '#ccc';
sidewalk.linewidth = two.width / 4;

var road = two.makeCurve(points, true);
road.translation.set(two.width / 2, two.height / 2);
road.noFill().stroke = '#666';
road.linewidth = two.width / 6;

/**
 * Create an array of lines that will be our dashed line.
 */

var dashes = [];

for (var j = 0; j < 10; j++) {

  var gutter = - 10;
  var length = two.height / (amount + gutter);
  var dash = two.makeLine(0, - length, 0, length);

  dash.noFill().stroke = '#fff';
  dash.linewidth = 3;
  dash.pct = j / (10 - 1);

  dash.translation.copy(points[j]).addSelf(road.translation);
  dashes.push(dash);

}

// Cached variables to use within the animation loop.
var a = new Two.Vector(), b = new Two.Vector();
var velocity = 0.0125;

two.bind('update', function(frameCount, timeDelta) {

  if (!timeDelta) {
    return;
  }

  for (var i = 0; i < amount; i++) {

    // Animate the road.

    var v = points[i];
    var pct = i / (amount - 1)
    var offset = pct * Math.PI * 2;
    var theta = offset + frameCount / 20;
    v.x = two.width / 20 * Math.cos(theta);

    var length = dashes.length;

    if (i > length - 1) {
      continue;
    }

    // Animate the dashes.

    var dash = dashes[i];
    // Assign the calculation of the vector on the road to `a`
    road.getPointAt(dash.pct, a);
    // Get an arbitrary vector right behind `a` in order to get the
    // angle for the rotation of the dash.
    road.getPointAt(dash.pct - 0.01, b);
    dash.translation.copy(a).addSelf(road.translation);
    dash.rotation = Two.Utils.angleBetween(a, b) + Math.PI / 2;

    dash.pct = mod(dash.pct + velocity, 1);

  }

});

// Add some mouse interaction
window.addEventListener('mousemove', function(e) {

  var pct = (e.clientY / window.innerHeight - 0.5) * 2;
  velocity = pct * 0.03;

}, false);

window.addEventListener('toushmove', function(e) {
  
  var touch = e.changedTouches[1];
  
  if (!touch) {
    return;
  }
  
  var pct = (e.pageY / window.innerHeight - 0.5) * 2;
  velocity = pct * 0.03;
  
});

function mod(v, l) {
  while (v < 0) {
    v += l;
  }
  return v % l;
}
              
            
!
999px

Console