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<html>
  <head>
    <title>Wishing Tree Playground</title>
    <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>
    <script src="http://mrdoob.github.com/three.js/build/Three.js"></script>
    <script src="lsys.js"></script>
  </head>

  <body>
    <h2>L-Systems.js Playground</h2>
    <div id="container"></div>
    <script>

      var WIDTH = 800; //window.innerWidth;
      var HEIGHT = 600; //window.innerHeight;

      var container;
      var scene, camera, renderer;

      var mouseX = 0, mouseY = 0;
      var windowHalfX = WIDTH / 2;
      var windowHalfY = HEIGHT / 2;

      init();
      draw_cube();
      animate();

      function init() {
        scene = new THREE.Scene();

        camera = new THREE.PerspectiveCamera(20, WIDTH / HEIGHT, 1, 10000);
        camera.position.z = 180;
        scene.add(camera);

        light = new THREE.DirectionalLight( 0xffffff );
        light.position.set( 0, 0, 1 );
        scene.add(light);

        renderer = new THREE.WebGLRenderer( { antialias: true } );
        renderer.setSize(WIDTH, HEIGHT);
        
        container = document.getElementById('container');
        container.appendChild(renderer.domElement);

        document.addEventListener('mousemove', onDocumentMouseMove, false);
      }

      function onDocumentMouseMove( event ) {
        mouseX = (event.clientX - windowHalfX);
        mouseY = (event.clientY - windowHalfY);
      }

      function draw_cube() {
        var materials = [];
        for (var i=0; i<6; i++) {
          materials.push(new THREE.MeshBasicMaterial({
            color : Math.random() * 0xffffff
          }));
        }

        var cube = new THREE.Mesh(new THREE.CubeGeometry(5, 5, 5, 1, 1, 1, materials), new THREE.MeshFaceMaterial());
        cube.position.x = 2.5;
        cube.position.y = 2.5;
        cube.position.z = 2.5;
        scene.add(cube);
      }

      function animate() {
        requestAnimationFrame(animate);
        render();
      }

      function render() {
        camera.position.x += (mouseX - camera.position.x) * 0.05;
        camera.position.y += (-mouseY - camera.position.y) * 0.05;
        camera.lookAt(scene.position);
        renderer.render(scene, camera);
      }

    </script>
  </body>
</html>