# 3D Navigation

<a href="/demos/3d_navigation.html">Play Demo</a>

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 packages/graphics/examples/3d_navigation.py

## Source Code

```{literalinclude} ../../packages/graphics/examples/3d_navigation.py
:language: python
:linenos:
```