Is there a plugin to add rotation to three.js self-learning project?

问题

I'm starting to play with three.js and was wondering if there's a simple plugin to add the trackball functionality so I can see how the changes I'm making in code is affecting the "underside" of the simple object.

I tried to follow:

http://mrdoob.github.com/three.js/examples/misc_controls_trackball.html

But I'm getting a lot of EventDispatcher errors.

By try, I mean I've:

added "TrackballControls.js"
added "Detector.js"

added this bit of code:

if ( ! Detector.webgl ) Detector.addGetWebGLMessage();
var controls = new THREE.TrackballControls( camera );
controls.rotateSpeed = 1.0;
controls.zoomSpeed = 1.2;
controls.panSpeed = 0.8;
controls.noZoom = false;
controls.noPan = false;
controls.staticMoving = true;
controls.dynamicDampingFactor = 0.3;
controls.keys = [ 65, 83, 68 ];
controls.addEventListener( 'change', render );

I did notice that the three.js used in the example is different than the one at (but not sure if it matters):

http://cdnjs.cloudflare.com/ajax/libs/three.js/r53/three.min.js

Any suggestions would be extremely helpful as I'm just starting out.

Thank you for your time!

Update: I tried using the latest build of Three.js from here:

https://github.com/mrdoob/three.js/blob/master/build/three.js

I couldn't find official builds of TrackballControls.js and Detector.js so I used these versions:

http://threejsdoc.appspot.com/doc/three.js/src.source/extras/controls/TrackballControls.js.html

http://mrdoob.github.com/three.js/examples/js/Detector.js

Here's the code that I could not get to work (it's a combination of http://www.aerotwist.com/tutorials/getting-started-with-three-js/ and http://mrdoob.github.com/three.js/examples/misc_controls_trackball.html and trying to make the object into a ring/torus):

<!doctype html>
<!--[if lt IE 7]> <html class="no-js ie6 oldie" lang="en"> <![endif]-->
<!--[if IE 7]>    <html class="no-js ie7 oldie" lang="en"> <![endif]-->
<!--[if IE 8]>    <html class="no-js ie8 oldie" lang="en"> <![endif]-->
<!--[if gt IE 8]><!--> <html class="no-js" lang="en"> <!--<![endif]-->
<head>
  <meta charset="utf-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
  <title>Getting Started with Three.js | Aerotwist</title>
  <meta name="description" content="The home of Creative Coder and developer Paul Lewis. Tutorial, experiments and considered opinions found here.">
  <meta name="author" content="Paul Lewis">


  <script src="http://code.jquery.com/jquery-1.9.1.min.js"></script>
    <script src="Three.js"></script>
    <script src="TrackballControls.js"></script>
    <script src="Detector.js"></script>
</head>
<style>
  #container {
    background: #000;
    width: 400px;
    height: 300px;
  }
</style>
<body>
<div id="container"></div>
</body>
<script type="text/javascript">
  function animate() {
    requestAnimationFrame( animate );
    controls.update();
  }
  function render() {
    renderer.render( scene, camera );
  }
  var WIDTH = 400,
      HEIGHT = 300;
  // set some camera attributes
  var VIEW_ANGLE = 45,
      ASPECT = WIDTH / HEIGHT,
      NEAR = 0.1,
      FAR = 10000;
  // get the DOM element to attach to
  // - assume we've got jQuery to hand
  var $container = $('#container');
  // create a WebGL renderer, camera
  // and a scene
  var renderer = new THREE.WebGLRenderer();
  var camera =
    new THREE.PerspectiveCamera(
      VIEW_ANGLE,
      ASPECT,
      NEAR,
      FAR);
  var scene = new THREE.Scene();

  // TrackBall code from http://mrdoob.github.com/three.js/examples/misc_controls_trackball.html
  var controls = new THREE.TrackballControls( camera );
  controls.rotateSpeed = 1.0;
  controls.zoomSpeed = 1.2;
  controls.panSpeed = 0.8;
  controls.noZoom = false;
  controls.noPan = false;
  controls.staticMoving = true;
  controls.dynamicDampingFactor = 0.3;
  controls.keys = [ 65, 83, 68 ];
  //controls.addEventListener( 'change', render ); // this was how it used to be at: http://mrdoob.github.com/three.js/examples/misc_controls_trackball.html
  controls.domElement.addEventListener( 'change', render ); // I changed this to fix error message: "controls.addEventListener is not a function"
  // --------------------------
  // add the camera to the scene
  scene.add(camera);
  // the camera starts at 0,0,0
  // so pull it back
  camera.position.z = 300;
  // start the renderer
  renderer.setSize(WIDTH, HEIGHT);
  // attach the render-supplied DOM element
  $container.append(renderer.domElement);
  // ------------------------
  // create the sphere's material
  var sphereMaterial =
    new THREE.MeshLambertMaterial(
      {
        color: 0xCC0000
      });
  // -------------------------------
  // ################ try torus
  var centerpiece = new THREE.TorusGeometry();
  var sphere = new THREE.Mesh(
    centerpiece,
    sphereMaterial);
  // add the sphere to the scene
  scene.add(sphere);
  // ---------------------------
  // create a point light
  var pointLight =
    new THREE.PointLight(0xFFFFFF);
  // set its position
  pointLight.position.x = 10;
  pointLight.position.y = 50;
  pointLight.position.z = 130;
  // add to the scene
  scene.add(pointLight);
  // -------------------------
  // draw!
  renderer.render(scene, camera); 
</script>

Whenever I click anywhere on the page I get this error message:

_eye.copy(...).subSelf is not a function

Any ideas?

Thank you for your time!

回答1:

Make sure you're using all the files from the same version. Ideally from the latest.

来源：https://stackoverflow.com/questions/15750532/is-there-a-plugin-to-add-rotation-to-three-js-self-learning-project

标签

three.js

trackball