Simple Drift Physics Controller – Camber ,Vehicle Axle Suspension, Effects

Stop fighting WheelColliders for drift cars. Get camber, clutch kicks, and actual drift scoring.

Simple Drift Controller replaces Unity's WheelCollider with a raycast-based suspension system purpose-built for drift. Every axle has independent left and right suspension travel, true camber dynamics, a three-region tire model, and a fully tunable drivetrain, from the engine torque curve and gear ratios to differential bias ratios and anti-roll bar stiffness.

Use the Auto-Configure wizard to go from meshes to a sliding vehicle in under a minute, or build your hierarchy manually for full control.

Camber System

• Static camber from -12 to +5 degrees
• Dynamic camber driven by body roll with configurable factor (0-5x) and clamping
• Left and right wheels use mirrored camber angles automatically
• Camber thrust generates lateral force toward the lean direction for sharper turn-in
• Grip penalty at excessive camber angles, reduces peak lateral force proportionally

Drivetrain

• Engine simulation: multi-keyframe torque curve, rotational inertia, kinematic RPM coupling, 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
• Clutch kick: brief torque spike (1-5x multiplier, 0.1-1s duration) to break traction on demand

Tire Model

• Three-region lateral force curve: linear climb to peak, gradual falloff, residual grip in full slide
• 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
• Speed-scaled force response for progressive turn-in at low speed

Steering

• Max steer angle up to 70 degrees for angle kit builds
• Sensitivity, smooth speed, and auto-return per axle
• High-speed reduction for forgiving arcade feel at speed
• Invert steer per axle

Drift Scoring

• Chassis slip angle detection with configurable minimum angle and speed thresholds
• Score accumulation: angle over time with multiplier
• Countersteering detection with bonus points
• Drift count, max angle tracking, and cooldown between drifts
• Public API for reset and live score access

Camera

• Drift-aware chase camera with lateral swing-out proportional to drift angle
• Velocity-based look direction blending (0-1)
• Speed pushback and ground-height avoidance
• Mouse freelook with auto-recenter when driving
• Spin yaw threshold prevents camera whip during lost control
• Multi-camera manager for switching views

Effects and Feedback

• Per-wheel skid marks via TrailRenderer prefabs, spawned and driven by slip
• Per-wheel smoke via ParticleSystem prefabs, spawned and driven by slip
• Both prefab slots are optional and independent
• Exclude steering axles checkbox for rear-only effects
• Tire screech audio with auto-created AudioSource, smooth fade in/out, and configurable volume/pitch curves
• No start/stop artifacts, audio loops continuously and fades volume only

Audio

• Dual AudioSource system for engine sound, auto-created if none exists
• RPM-blended pitch and volume between idle and running clips
• Always-audible engine floor at idle (minimum 0.15 volume)
• Shift sound support with one-shot clip on gear change

Presets, One-Click Setup

• Vehicle presets: Street, Tuner, Pro Drift, Formula D, set weight, engine, transmission, suspension, differentials, and traction control
• Surface presets: Asphalt, Polished Concrete, Wet, Low Grip, set tire curve per axle
• Engine presets: I4 NA, I4 Turbo, I6 NA, V6 NA, V6 Turbo, I6 TD, V8 NA, V8 S/C
• Transmission presets: 4, 5, or 6-speed gearboxes

Input

• New Input System via DriftInputSystem, auto-added with no manual wiring
• DriftInputDelegate for code-driven control (AI, testing, networked vehicles)
• Default .inputactions asset included with full action map
• Dedicated clutch kick and handbrake toggle bindings

Lights

• 4-state cycle: Off, Main, HighBeam, Accessories
• Automatic brake and reverse lights
• Configurable light lists per channel

Telemetry

• DriftInfo with live runtime data in the custom editor
• Speed, throttle, steering, engine RPM, gear, torque, and drive torque
• Per-axle articulation, compression, ground contact, steer angle, camber, and lateral force
• Drift angle, drifting status, and score
• 0-60 and 0-100 timers
• F12 logging and clipboard export

Editor

• Full custom inspector for DriftVehicle with preset buttons, sliders, and real-time gauges
• Auto-Configure wizard with interactive body and wheel setup
• SceneGUI handles for Center of Mass and camber visualization
• Live DriftInfoEditor for Play Mode telemetry

What's Included

• 15 C# scripts (runtime + editor)
• Custom inspectors with preset buttons, sliders, and real-time gauges
• Auto-Configure editor wizard (body + wheel setup)
• Full documentation with setup guide, component reference, and tuning tips
• Image stub list for documentation screenshots