Learn THREEJS-ANIMATION with Real Code Examples
Updated Nov 26, 2025
Architecture
AnimationMixer controls actions
AnimationClips hold timeline data
Tracks define timed keyframes
Interpolants compute in-between values
Render loop updates mixer.tick to animate
Rendering Model
Mixer updates animation values
Interpolants compute transition values
Renderer draws updated transforms
GLTF animations baked for GPU efficiency
Animation independent of render cycle
Architectural Patterns
Clip-based animation pipelines
Modular track architecture
Mixer as central playback hub
GLTF-first animation workflows
Timeline + property binding model
Real World Architectures
Interactive 3D product configurators
Real-time online character viewers
Architectural flythrough animations
Three.js cinematic web landing pages
3D brand storytelling experiences
Design Principles
Flexible timeline architecture
Reusable clip-based system
Separation of animation data & playback
Interpolation-first design
Lightweight runtime overhead
Scalability Guide
Limit active mixers
Use clip caching
Reduce bone counts
Compress animations via GLTF
Profile animation cost in devtools
Migration Guide
Move from manual JS animations to AnimationMixer
Replace FBX with GLTF
Use mixers instead of per-frame manual updates
Adopt GLTF tracks for consistent interpolation
Use action.crossFade for transitions