Error encountered in ThreeJS version r75: THREE.Animation is not defined as a constructor

Question

Error encountered in ThreeJS version r75: THREE.Animation is not defined as a constructor

Currently, I am utilizing the most up-to-date version of ThreeJS available. My goal is to import a Blender Model with rigged animations in ThreeJS. Despite conducting extensive research online and reviewing various tutorials, all references point to either THREE.AnimationHandler or THREE.Animation. However, I keep encountering errors indicating that no such constructor exists.

Upon further investigation within the online documentation, I did locate them:

Animation

AnimationHandler

Despite my findings, neither resource explicitly mentions that they are deprecated. Additionally, after examining the source file, I was unable to locate them there as well. Is it possible that I am overlooking something significant?

javascript animation three.js

Answer 1

Answer №1

A few days ago, I encountered a similar issue and discovered that a new animation system had been incorporated into recent updates. Fortunately, I came across an informative article titled New skinned mesh animation system in three.js which provided me with the necessary insights. It appears that the documentation has not been fully updated yet.

In my particular scenario, I needed to import a model in JSON format and initiate the animation process. Here is a snippet of the code:

 var loader = new THREE.ObjectLoader(),
     clock = new THREE.Clock(),
     mixer;

 loader.load('models.json', function (object) {
    // Extract object animation
    var sceneAnimationClip = object.animations[0];

    // Create an animation mixer and assign the object to it
    mixer = new THREE.AnimationMixer(object);

    // Set up the animation action and commence playback
    var sceneAnimation = mixer.clipAction(sceneAnimationClip);
    sceneAnimation.play();

    scene.add(object);

    render()
});

function render() {
    requestAnimationFrame(render);

    // Update the animation   
    var delta = clock.getDelta();
    if( mixer ) {
        mixer.update( delta );
    }

    renderer.render(scene, camera);
}

Answer 2

A few days ago, I encountered a similar issue and discovered that a new animation system had been incorporated into recent updates. Fortunately, I came across an informative article titled New skinned mesh animation system in three.js which provided me with the necessary insights. It appears that the documentation has not been fully updated yet.

In my particular scenario, I needed to import a model in JSON format and initiate the animation process. Here is a snippet of the code:

 var loader = new THREE.ObjectLoader(),
     clock = new THREE.Clock(),
     mixer;

 loader.load('models.json', function (object) {
    // Extract object animation
    var sceneAnimationClip = object.animations[0];

    // Create an animation mixer and assign the object to it
    mixer = new THREE.AnimationMixer(object);

    // Set up the animation action and commence playback
    var sceneAnimation = mixer.clipAction(sceneAnimationClip);
    sceneAnimation.play();

    scene.add(object);

    render()
});

function render() {
    requestAnimationFrame(render);

    // Update the animation   
    var delta = clock.getDelta();
    if( mixer ) {
        mixer.update( delta );
    }

    renderer.render(scene, camera);
}

Error encountered in ThreeJS version r75: THREE.Animation is not defined as a constructor

Answer №1

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