Vehicle Physics Kit
Released
Raycast-wheel vehicle physics for s&box: slip-curve tires, full drivetrain, assists and a chase camera. No art required.
by sbox Field Guide library
updated one month ago
1.2MB
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Vehicle Physics Kit
Changes
Bring your own body
Bring your own body
A changelist for Vehicle Physics Kit.

Bring your own body

0.2.0
19 July 2026
11 changes in this update

Added

7 changes

  • First public release of the Vehicle Physics Kit, the raycast-wheel stack that powers Vehicle Prototyping.

  • Contact-normal suspension, slip-curve tires with a friction ellipse, and a full drivetrain with auto-clutch plus auto and sequential shifting.

  • Per-car assist levels (Casual, Sport, Sim), spring-arm chase camera with orbit and scroll zoom, and placeholder engine and skid audio.

  • Four ready-to-drive roster cars (hatch, coupe, kart, pickup) on primitive blockout bodies, no art needed to start driving.

  • A bundled demo scene: install the kit, open vehiclephysics_demo, press play.

  • Seams for making it yours: CustomBodyBuilder swaps in your own car models, InputOverride lets an AI or replay drive, CursorModalOpen plays nice with your UI.

  • Full README with quickstart, API tour, seam list and required input actions.

Fixed

2 changes

  • Kart stuck-turn fix ported from upstream Vehicle Prototyping: cap-aware drive torque rolloff plus a Casual traction control floor relaxation, so turning hard under power no longer locks you into the turn.

  • Demo quality of life: only the car the camera follows listens to your keys (one W press no longer launches the whole row), and cars driven off the pad edge respawn on their marks instead of falling forever.

Known Issues

2 changes

  • The cars are ugly boxes on purpose. This is a physics library, your game brings the art.

  • First generation release: the core physics is proven in a shipped game, but the API surface may still move.