MotrixSim now runs simulations directly in the browser, with no software to install. Drag and drop an MJCF model folder to load a custom scene, or browse built-in models in the online asset library. This feature is in early beta — try it at motrix.motphys.com.

The full vehicle model comprises dozens of joints and links, spanning ball, slide, hinge, and fixed joint types. The front wheels use independent MacPherson suspension, the rear wheels use a non-independent torsion-beam suspension, and a Fixed Tendon models the power split of an open differential. The example implements complete keyboard driving control (W/A/S/D), including speed-adaptive steering, brake-priority logic, and heading hold. Run with uv run examples/car.py.