Animation and Physics - Three.js - page 300

If you check the animate box, an animation that automatically morphs this car will
start.
How to do it…
To use morphing animations, we need to take the following steps:
1. The first thing we need to do is load the model that contains morph targets.
For this recipe, we've got a JSON -based model, which we load like this:
var jsonLoader = new THREE.JSONLoader();
jsonLoader.load("../assets/models/morph/
car.js",
function(model, materials) {
...
});
Here, we use THREE.JSONLoader to load a model, and once it is loaded,
we call the provided function.
2. Before we create THREE.Mesh , there is one additional step we need to take.
We need to set the morphTargets property on the materials that are set to
true :
materials.forEach(function(mat) {
mat.morphTargets = true;
});