Simple Offroad Physics Controller - 4x4 Vehicle, Axle Suspension, Crawler

Stop fighting Wheel Colliders. Get real solid-axle articulation. Simple Offroad Controller replaces Unity's WheelCollider with a raycast-based solid-axle system that gives you independent left/right wheel travel per axle, true differential locking, and a full tunable drivetrain, from the engine torque curve and gear ratios to spring rates, damper curves, and differential bias ratios. Use the Auto-Configure wizard to go from meshes to a driving vehicle in under a minute, or build your hierarchy manually for full control. Solid-Axle Physics - Real articulation with independent left/right suspension travel per axle - 4-ray wheel cast: center, left edge, right edge + forward-down step detection at 30° - No WheelCollider, every ground interaction is custom raycast - Spring-damper suspension with adjustable ride height, bump travel, droop, spring rate, and damping - Anti-roll bar per axle with tunable stiffness Drivetrain - Engine simulation: multi-keyframe torque curve, rotational inertia, kinematic RPM coupling (engine speed driven by wheel speed through gear ratios), stall detection - Automatic transmission: configurable gear ratios (4/5/6-speed presets), shift-up/down RPM thresholds, shift duration - Differential models: Open, Locked, and Limited-Slip with configurable torque bias ratio - Low range (4LO): torque-multiplying transfer case gear - Toggleable 4WD: switch between 2WD and 4WD per axle on the fly Tire Model - Three-region lateral force curve (linear climb → gradual falloff → residual grip) - Peak slip angle, max slip angle, and slide grip ratio, fully tunable per axle - Friction circle coupling — throttle and brake forces interact with lateral grip - Relaxation length, lateral force builds based on tire rolling distance, not a fixed timer, for realistic weight feel - Speed-scaled force response (progressive turn-in at low speed, responsive at high speed) Steering - Max steer angle, sensitivity, smooth speed, and auto-return per axle - High-speed reduction, reduces effective steering angle at speed for a forgiving arcade feel - Reference speed control for reduction curve - Invert steer per axle Presets (One-Click Setup) - Vehicle presets: Rock Crawler, Trail Rig, Overlander, Baja Racer — set weight, engine, transmission, suspension, differentials, and aerodynamics in one click - Engine presets: V8 (diesel torque), V6 (balanced), I4 (high-RPM), I6 (broad flat curve) - Transmission presets: 4, 5, or 6-speed gearboxes Input - New Input System (PlayerInput / .inputactions asset) via OffroadInputSystem — auto-added, no manual wiring - OffroadInputDelegate for code-driven control: AI, testing, networked vehicles - Max throttle slider for keyboard demos - Auto reverse hold brake at standstill AI Driver (BETA) - Pure pursuit steering on a smooth Catmull-Rom spline path - Curvature-based speed planning with approach braking and recovery zones - Speed-adaptive lookahead distance - Obstacle avoidance (optional, 5-ray fan) - 4WD, low range, and e-brake support - Auto-rebuilds path when waypoints move in the editor Camera - Forza-style follow camera with velocity look-ahead - Mouse freelook with auto-recenter when driving - Speed-based pushback and ground-height avoidance - Multi-camera manager for switching (interior, chase, bumper, etc.) Effects & Feedback - Tire noise, velocity-based lateral slip with configurable volume/pitch curves and cooldown - Dust particles on slip - OffroadAudio, dual AudioSource with RPM-blended pitch/volume crossfade (idle + running), shift sounds, stall muting - OffroadLightManager, 4-state cycle (Off → Main → HighBeam → Accessories) with automatic brake and reverse lights - OffroadInfo (telemetry), real-time HUD overlay showing RPM, gear, speed, torque, compression, articulation, differential mode, and more - Rich gizmo visualization, axle center, suspension travel, bump/droop stops, steer cone, spring zigzag Vehicle Features - Traction control (strength 0–1