# 2D Joints

<a href="/demos/2d_joints.html">Play Demo</a>

Demonstrates:
  - RigidBody2D physics bodies with automatic gravity
  - StaticBody2D as a fixed anchor point
  - PinJoint2D connecting bodies with Baumgarte-stabilized distance constraints
  - PhysicsServer handles all constraint solving automatically
  - Click-to-apply-force interaction on the bottom ball

Controls:
  LMB   - Apply impulse to the bottom ball
  R     - Reset the chain
  ESC   - Quit

Run: uv run python packages/graphics/examples/2d_joints.py

## Source Code

```{literalinclude} ../../packages/graphics/examples/2d_joints.py
:language: python
:linenos:
```