b3dBeginVehicleTrack

Begins defining a vehicle track (left or right tread) for tracked vehicles. Takes vehicleHandle (tracked vehicle from b3dCreateTrackedVehicleChassis), drivenWheelIndex (primary driven wheel index that receives engine power), inertia (track rotational inertia affecting responsiveness, typical 10-100), angularDamping (track angular damping 0-1, typical 0.3-0.7), maxBrakeTorque (maximum brake torque in Nm for track, typical 2000-5000), differentialRatio (gear ratio for track, typical 2.0-4.0). Returns track index for use with b3dAddWheelToTrack and b3dEndVehicleTrack.

Track definition workflow: call b3dBeginVehicleTrack to start track (specifies track parameters), call b3dAddWheelToTrack multiple times (add wheels to track group, all wheels in track move together), call b3dEndVehicleTrack to finalize track. Typically create 2 tracks per vehicle (left track and right track for differential steering).

Differential steering: left track speed different from right track speed causes vehicle to turn (faster left track = turn right, faster right track = turn left), both tracks same speed = straight movement.

Related: b3dCreateTrackedVehicleChassis creates tracked vehicle, b3dAddWheelToTrack adds wheels to this track, b3dEndVehicleTrack finalizes track, b3dAddVehicleWheel adds wheels before grouping into tracks.