Godot Box2D v3 is a high-performance physics extension for Godot 4.3+ that implements Box2D v3. It can be considered a successor to the Godot Box2D extension.

Features

• Improved stability and performance, especially for large piles of bodies
• Faster, more accurate queries (e.g. cast_motion, intersect_ray)
• Continuous collision detection (CCD) enabled by default for dynamic vs static collisions
• Additional APIs to make the physics server easier and faster to use (docs coming soon)

Unsupported Features / Limitations

Most of the Physics API has been implemented, but the following features do not have parity with Godot Physics:

• WorldBoundaryShape2D unsupported (planned for a future version of Box2D)
• SeparationRayShape2D unsupported
• Space parameters (space_set_param) unsupported because Box2D v3 uses a different solver
• "Cast Ray" CCD mode (CCDMode::CCD_MODE_CAST_RAY) unsupported
• Contacts are not visible when Visible Collision Shapes is enabled
• Convex polygons cannot have more than 8 vertices (does not affect CollisionPolygon2D)
• constant_linear_velocity and constant_angular_velocity unsupported on static bodies
• CharacterBody2D: unstable movement on moving platforms

Planned Features

• Cross-platform determinism
• Serialization + Rollback