Car-Simulation/Car simulation/Car.cs

using static SFML.Window.Mouse;

namespace Car_simulation
{
    public class Car
    {
        public Vector2 Position = new Vector2(0, 0);
        public Vector2 Velocity => new Vector2(WheelSystem.CarSpeed, 0); // Now directly from wheels

        public float Speed => WheelSystem.CarSpeed;

        public float Mass { get; set; } = 1500f; // kg
        public int WheelCount = 4;
        public int DrivenWheels = 2;

        public float ThrottleInput = 0f;
        public float BrakeInput = 0f;
        public float ClutchInput = 1f; // 0 = engaged, 1 = disengaged
        public bool ForceClutch = false;
        public float SteeringInput = 0f;

        // Aerodynamics
        private const float AirDensity = 1.225f;
        public float DragCoefficient = 0.3f;
        public float FrontalArea = 2.2f; // m²
        public float RollingResistanceCoefficient = 0.015f;

        // Components
        public Engine Engine;
        public Drivetrain Drivetrain;
        public WheelSystem WheelSystem;

        private EngineSound _engineSound;
        private bool _audioEnabled = true;

        public Car()
        {
            Engine = new Engine();
            WheelSystem = new WheelSystem();

            // Set car mass in wheel system (so it's included in energy calculations)
            WheelSystem.CarMass = Mass;
            WheelSystem.WheelCount = WheelCount;
            WheelSystem.DrivenWheels = DrivenWheels;

            Drivetrain = new Drivetrain(Engine, WheelSystem);

            InitializeAudio();
        }

        public List<string> GetDisplayData()
        {
            return new List<string>
        {
            $"Engine Energy: {Engine.FlywheelEnergy,7:F0} J",
            $"Engine Torque: {Engine.GetTorqueOutput(),7:F0} Nm",
            $"Engine RPM: {Engine.RPM,7:F0}",
            $"Total Energy: {WheelSystem.TotalEnergy,7:F0} J",
            $"  (Wheel Rot: {WheelSystem.GetRotationalEnergy(),7:F0} J)",
            $"  (Car Trans: {WheelSystem.GetTranslationalEnergy(),7:F0} J)",
            $"Wheel RPM: {WheelSystem.RPM,7:F0}",
            $"Vehicle: {Speed * 3.6f,7:F1} km/h",
            $"Throttle: {Engine.GetActualThrottle() * 100,6:F1}%",
            $"Power: {Engine.CurrentPower / 1000,6:F1} kW",
            $"Transmitted: {Drivetrain.TransmittedPower / 1000,6:F1} kW",
            $"Brake: {BrakeInput * 100,6:F1}%",
            $"Speed Diff: {Drivetrain.GetSpeedDifferenceRPM(),6:F0} RPM",
            $"Clutch: {ClutchInput * 100,6:F1}% disengaged",
            $"Clutch T: {Drivetrain.ClutchTorque,6:F0} Nm",
            $"Clutch Slip: {Drivetrain.GetClutchSlipPercent(),6:F1}%",
            $"Resistance: {CalculateTotalResistanceForce(),6:F1} N",
            $"Drag: {CalculateDragForce(),6:F1} N",
            $"Rolling: {CalculateRollingResistanceForce(),6:F1} N",
            $"Gear: {Drivetrain.GetCurrentGearName(),3} (Ratio: {Drivetrain.GearRatio:F2}:1)"
        };
        }

        private void InitializeAudio()
        {
            try
            {
                _engineSound = new EngineSound();
                _engineSound.SetEngineState(Engine.IdleRPM, 0f);
                _engineSound.StartSound();
            }
            catch (Exception ex)
            {
                Console.WriteLine($"Audio initialization failed: {ex.Message}");
                _audioEnabled = false;
            }
        }

        public void Update(float deltaTime)
        {
            Engine.Throttle = ThrottleInput;
            Drivetrain.ClutchEngagement = 1f - ClutchInput;

            if (ForceClutch)
                Drivetrain.ClutchEngagement = 0f;

            // Update engine
            Engine.Update(deltaTime);

            // Update drivetrain (transfers energy between engine and wheels+car)
            Drivetrain.Update(deltaTime);

            // Calculate and apply resistance
            float resistanceForce = CalculateTotalResistanceForce();
            WheelSystem.ResistanceTorque = resistanceForce * WheelSystem.Radius;
            WheelSystem.ApplyResistance(deltaTime);

            // Apply braking
            ApplyBraking(deltaTime);

            // Update position based on velocity (which comes from WheelSystem)
            Position += Velocity * deltaTime;

            if (_audioEnabled)
                UpdateAudio();
        }

        private void UpdateAudio()
        {
            try
            {
                float throttle = Engine.GetActualThrottle();
                _engineSound.SetEngineState(Engine.RPM, throttle);
            }
            catch (Exception ex)
            {
                Console.WriteLine($"Audio update error: {ex.Message}");
            }
        }

        private void ApplyBraking(float deltaTime)
        {
            if (BrakeInput <= 0) return;

            float brakeTorque = BrakeInput * 3000f;
            WheelSystem.ApplyTorque(-brakeTorque, deltaTime);
        }

        public float CalculateTotalResistanceForce()
        {
            float dragForce = CalculateDragForce();
            float rollingForce = CalculateRollingResistanceForce();
            return dragForce + rollingForce;
        }

        public float CalculateDragForce()
        {
            float speed = Speed;
            return 0.5f * AirDensity * DragCoefficient * FrontalArea * speed * speed;
        }

        public float CalculateRollingResistanceForce()
        {
            return RollingResistanceCoefficient * Mass * 9.81f;
        }
    }
}