# 3D Navigation

NavigationMesh3D pathfinding with obstacle carving.

```{raw} html
<a class="example-run-button" href="../demos/features_3d_navigation.html">▶ Run in browser</a>

```

**Tags:** `3d`

Demonstrates:
  - NavigationMesh3D with subdivided walkable polygon (cell_size)
  - Obstacle carving via add_obstacle() to cut holes in the navmesh
  - NavigationRegion3D registering the navmesh with the server
  - NavigationAgent3D following a path that routes around obstacles
  - NavigationObstacle3D for dynamic (runtime) avoidance
  - HUD showing agent state (idle / navigating / arrived)

Controls: Left-click set destination, R reset agent
Run: uv run python examples/features/3d/navigation.py

## Source

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