# Skeletal animation demo

articulated arm with bone-driven wave motion.

```{raw} html
<a class="example-run-button" href="../demos/features_3d_skeletal.html">▶ Run in browser</a>

```

**Tags:** `3d`

Demonstrates:
  - Skeleton with a chain of 4 bones (root, upper_arm, forearm, hand)
  - SkeletalAnimationClip with BoneTracks for rotation keyframes
  - MeshInstance3D cubes transformed by joint matrices each frame
  - Smooth sinusoidal wave animation through the bone chain

Run: uv run python examples/features/3d/skeletal.py

Controls:
    Left/Right - Orbit camera
    Up/Down    - Zoom in/out
    Space      - Pause/resume animation
    Escape     - Quit

## Source

```{literalinclude} ../../examples/features/3d/skeletal.py
:language: python
:linenos:
```