Three.js Animation System FAQs

Question 1

How do I play animations from a GLTF model using this skill?

Accepted Answer

Use the GLTFLoader to import your model, create an AnimationMixer targeting the model, and then use mixer.clipAction() to play specific clips found in the gltf.animations array.

Question 2

Why is THREE.Timer recommended over THREE.Clock?

Accepted Answer

As of Three.js r183, THREE.Timer is the preferred utility because it automatically pauses when the browser tab is hidden and offers a more modern, cleaner API for delta and elapsed time.

Question 3

Can I blend two different animations, like walking and running?

Accepted Answer

Yes, by adjusting the weight of different AnimationActions using setEffectiveWeight(), you can smoothly blend multiple animations based on variables like movement speed.

Question 4

What are Morph Targets used for in Three.js?

Accepted Answer

Morph targets are used to deform a mesh between different predefined shapes, which is ideal for facial expressions, muscle bulges, or any shape-shifting visual effects.

Question 5

How can I achieve smooth procedural movement without keyframes?

Accepted Answer

This skill provides patterns for 'Smooth Damping' and 'Spring Physics' classes that allow objects to follow targets with natural-looking momentum and elasticity.

Three.js Animation System

Key Features

Use Cases

Three.js Animation System

Key Features

Use Cases