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Question by nuckolls · May 25, 2017 at 02:52 PM · script.gameprogramminggameobjects

Hey guys I need help with scripting a 2 player car game I'm very confused on the whole process.

Hey guys I need help with scripting a 2 player car game I'm very confused on the whole process I don't even know what script to change because there are 2 scripts so if anybody can help me with this problem that would be a great I have 2 days to turn in this project so please help me thank you

using System; using UnityEngine;

namespace UnityStandardAssets.Vehicles.Car { internal enum CarDriveType { FrontWheelDrive, RearWheelDrive, FourWheelDrive }

 internal enum SpeedType
 {
     MPH,
     KPH
 }

 public class CarController : MonoBehaviour
 {
     [SerializeField] private CarDriveType m_CarDriveType = CarDriveType.FourWheelDrive;
     [SerializeField] private WheelCollider[] m_WheelColliders = new WheelCollider[4];
     [SerializeField] private GameObject[] m_WheelMeshes = new GameObject[4];
     [SerializeField] private WheelEffects[] m_WheelEffects = new WheelEffects[4];
     [SerializeField] private Vector3 m_CentreOfMassOffset;
     [SerializeField] private float m_MaximumSteerAngle;
     [Range(0, 1)] [SerializeField] private float m_SteerHelper; // 0 is raw physics , 1 the car will grip in the direction it is facing
     [Range(0, 1)] [SerializeField] private float m_TractionControl; // 0 is no traction control, 1 is full interference
     [SerializeField] private float m_FullTorqueOverAllWheels;
     [SerializeField] private float m_ReverseTorque;
     [SerializeField] private float m_MaxHandbrakeTorque;
     [SerializeField] private float m_Downforce = 100f;
     [SerializeField] private SpeedType m_SpeedType;
     [SerializeField] private float m_Topspeed = 200;
     [SerializeField] private static int NoOfGears = 5;
     [SerializeField] private float m_RevRangeBoundary = 1f;
     [SerializeField] private float m_SlipLimit;
     [SerializeField] private float m_BrakeTorque;

     private Quaternion[] m_WheelMeshLocalRotations;
     private Vector3 m_Prevpos, m_Pos;
     private float m_SteerAngle;
     private int m_GearNum;
     private float m_GearFactor;
     private float m_OldRotation;
     private float m_CurrentTorque;
     private Rigidbody m_Rigidbody;
     private const float k_ReversingThreshold = 0.01f;

     public bool Skidding { get; private set; }
     public float BrakeInput { get; private set; }
     public float CurrentSteerAngle{ get { return m_SteerAngle; }}
     public float CurrentSpeed{ get { return m_Rigidbody.velocity.magnitude*2.23693629f; }}
     public float MaxSpeed{get { return m_Topspeed; }}
     public float Revs { get; private set; }
     public float AccelInput { get; private set; }

     // Use this for initialization
     private void Start()
     {
         m_WheelMeshLocalRotations = new Quaternion[4];
         for (int i = 0; i < 4; i++)
         {
             m_WheelMeshLocalRotations[i] = m_WheelMeshes[i].transform.localRotation;
         }
         m_WheelColliders[0].attachedRigidbody.centerOfMass = m_CentreOfMassOffset;

         m_MaxHandbrakeTorque = float.MaxValue;

         m_Rigidbody = GetComponent<Rigidbody>();
         m_CurrentTorque = m_FullTorqueOverAllWheels - (m_TractionControl*m_FullTorqueOverAllWheels);
     }


     private void GearChanging()
     {
         float f = Mathf.Abs(CurrentSpeed/MaxSpeed);
         float upgearlimit = (1/(float) NoOfGears)*(m_GearNum + 1);
         float downgearlimit = (1/(float) NoOfGears)*m_GearNum;

         if (m_GearNum > 0 && f < downgearlimit)
         {
             m_GearNum--;
         }

         if (f > upgearlimit && (m_GearNum < (NoOfGears - 1)))
         {
             m_GearNum++;
         }
     }


     // simple function to add a curved bias towards 1 for a value in the 0-1 range
     private static float CurveFactor(float factor)
     {
         return 1 - (1 - factor)*(1 - factor);
     }


     // unclamped version of Lerp, to allow value to exceed the from-to range
     private static float ULerp(float from, float to, float value)
     {
         return (1.0f - value)*from + value*to;
     }


     private void CalculateGearFactor()
     {
         float f = (1/(float) NoOfGears);
         // gear factor is a normalised representation of the current speed within the current gear's range of speeds.
         // We smooth towards the 'target' gear factor, so that revs don't instantly snap up or down when changing gear.
         var targetGearFactor = Mathf.InverseLerp(f*m_GearNum, f*(m_GearNum + 1), Mathf.Abs(CurrentSpeed/MaxSpeed));
         m_GearFactor = Mathf.Lerp(m_GearFactor, targetGearFactor, Time.deltaTime*5f);
     }


     private void CalculateRevs()
     {
         // calculate engine revs (for display / sound)
         // (this is done in retrospect - revs are not used in force/power calculations)
         CalculateGearFactor();
         var gearNumFactor = m_GearNum/(float) NoOfGears;
         var revsRangeMin = ULerp(0f, m_RevRangeBoundary, CurveFactor(gearNumFactor));
         var revsRangeMax = ULerp(m_RevRangeBoundary, 1f, gearNumFactor);
         Revs = ULerp(revsRangeMin, revsRangeMax, m_GearFactor);
     }


     public void Move(float steering, float accel, float footbrake, float handbrake)
     {
         for (int i = 0; i < 4; i++)
         {
             Quaternion quat;
             Vector3 position;
             m_WheelColliders[i].GetWorldPose(out position, out quat);
             m_WheelMeshes[i].transform.position = position;
             m_WheelMeshes[i].transform.rotation = quat;
         }

         //clamp input values
         steering = Mathf.Clamp(steering, -1, 1);
         AccelInput = accel = Mathf.Clamp(accel, 0, 1);
         BrakeInput = footbrake = -1*Mathf.Clamp(footbrake, -1, 0);
         handbrake = Mathf.Clamp(handbrake, 0, 1);

         //Set the steer on the front wheels.
         //Assuming that wheels 0 and 1 are the front wheels.
         m_SteerAngle = steering*m_MaximumSteerAngle;
         m_WheelColliders[0].steerAngle = m_SteerAngle;
         m_WheelColliders[1].steerAngle = m_SteerAngle;

         SteerHelper();
         ApplyDrive(accel, footbrake);
         CapSpeed();

         //Set the handbrake.
         //Assuming that wheels 2 and 3 are the rear wheels.
         if (handbrake > 0f)
         {
             var hbTorque = handbrake*m_MaxHandbrakeTorque;
             m_WheelColliders[2].brakeTorque = hbTorque;
             m_WheelColliders[3].brakeTorque = hbTorque;
         }


         CalculateRevs();
         GearChanging();

         AddDownForce();
         CheckForWheelSpin();
         TractionControl();
     }


     private void CapSpeed()
     {
         float speed = m_Rigidbody.velocity.magnitude;
         switch (m_SpeedType)
         {
             case SpeedType.MPH:

                 speed *= 2.23693629f;
                 if (speed > m_Topspeed)
                     m_Rigidbody.velocity = (m_Topspeed/2.23693629f) * m_Rigidbody.velocity.normalized;
                 break;

             case SpeedType.KPH:
                 speed *= 3.6f;
                 if (speed > m_Topspeed)
                     m_Rigidbody.velocity = (m_Topspeed/3.6f) * m_Rigidbody.velocity.normalized;
                 break;
         }
     }


     private void ApplyDrive(float accel, float footbrake)
     {

         float thrustTorque;
         switch (m_CarDriveType)
         {
             case CarDriveType.FourWheelDrive:
                 thrustTorque = accel * (m_CurrentTorque / 4f);
                 for (int i = 0; i < 4; i++)
                 {
                     m_WheelColliders[i].motorTorque = thrustTorque;
                 }
                 break;

             case CarDriveType.FrontWheelDrive:
                 thrustTorque = accel * (m_CurrentTorque / 2f);
                 m_WheelColliders[0].motorTorque = m_WheelColliders[1].motorTorque = thrustTorque;
                 break;

             case CarDriveType.RearWheelDrive:
                 thrustTorque = accel * (m_CurrentTorque / 2f);
                 m_WheelColliders[2].motorTorque = m_WheelColliders[3].motorTorque = thrustTorque;
                 break;

         }

         for (int i = 0; i < 4; i++)
         {
             if (CurrentSpeed > 5 && Vector3.Angle(transform.forward, m_Rigidbody.velocity) < 50f)
             {
                 m_WheelColliders[i].brakeTorque = m_BrakeTorque*footbrake;
             }
             else if (footbrake > 0)
             {
                 m_WheelColliders[i].brakeTorque = 0f;
                 m_WheelColliders[i].motorTorque = -m_ReverseTorque*footbrake;
             }
         }
     }


     private void SteerHelper()
     {
         for (int i = 0; i < 4; i++)
         {
             WheelHit wheelhit;
             m_WheelColliders[i].GetGroundHit(out wheelhit);
             if (wheelhit.normal == Vector3.zero)
                 return; // wheels arent on the ground so dont realign the rigidbody velocity
         }

         // this if is needed to avoid gimbal lock problems that will make the car suddenly shift direction
         if (Mathf.Abs(m_OldRotation - transform.eulerAngles.y) < 10f)
         {
             var turnadjust = (transform.eulerAngles.y - m_OldRotation) * m_SteerHelper;
             Quaternion velRotation = Quaternion.AngleAxis(turnadjust, Vector3.up);
             m_Rigidbody.velocity = velRotation * m_Rigidbody.velocity;
         }
         m_OldRotation = transform.eulerAngles.y;
     }


     // this is used to add more grip in relation to speed
     private void AddDownForce()
     {
         m_WheelColliders[0].attachedRigidbody.AddForce(-transform.up*m_Downforce*
                                                      m_WheelColliders[0].attachedRigidbody.velocity.magnitude);
     }


     // checks if the wheels are spinning and is so does three things
     // 1) emits particles
     // 2) plays tiure skidding sounds
     // 3) leaves skidmarks on the ground
     // these effects are controlled through the WheelEffects class
     private void CheckForWheelSpin()
     {
         // loop through all wheels
         for (int i = 0; i < 4; i++)
         {
             WheelHit wheelHit;
             m_WheelColliders[i].GetGroundHit(out wheelHit);

             // is the tire slipping above the given threshhold
             if (Mathf.Abs(wheelHit.forwardSlip) >= m_SlipLimit || Mathf.Abs(wheelHit.sidewaysSlip) >= m_SlipLimit)
             {
                 m_WheelEffects[i].EmitTyreSmoke();

                 // avoiding all four tires screeching at the same time
                 // if they do it can lead to some strange audio artefacts
                 if (!AnySkidSoundPlaying())
                 {
                     m_WheelEffects[i].PlayAudio();
                 }
                 continue;
             }

             // if it wasnt slipping stop all the audio
             if (m_WheelEffects[i].PlayingAudio)
             {
                 m_WheelEffects[i].StopAudio();
             }
             // end the trail generation
             m_WheelEffects[i].EndSkidTrail();
         }
     }

     // crude traction control that reduces the power to wheel if the car is wheel spinning too much
     private void TractionControl()
     {
         WheelHit wheelHit;
         switch (m_CarDriveType)
         {
             case CarDriveType.FourWheelDrive:
                 // loop through all wheels
                 for (int i = 0; i < 4; i++)
                 {
                     m_WheelColliders[i].GetGroundHit(out wheelHit);

                     AdjustTorque(wheelHit.forwardSlip);
                 }
                 break;

             case CarDriveType.RearWheelDrive:
                 m_WheelColliders[2].GetGroundHit(out wheelHit);
                 AdjustTorque(wheelHit.forwardSlip);

                 m_WheelColliders[3].GetGroundHit(out wheelHit);
                 AdjustTorque(wheelHit.forwardSlip);
                 break;

             case CarDriveType.FrontWheelDrive:
                 m_WheelColliders[0].GetGroundHit(out wheelHit);
                 AdjustTorque(wheelHit.forwardSlip);

                 m_WheelColliders[1].GetGroundHit(out wheelHit);
                 AdjustTorque(wheelHit.forwardSlip);
                 break;
         }
     }


     private void AdjustTorque(float forwardSlip)
     {
         if (forwardSlip >= m_SlipLimit && m_CurrentTorque >= 0)
         {
             m_CurrentTorque -= 10 * m_TractionControl;
         }
         else
         {
             m_CurrentTorque += 10 * m_TractionControl;
             if (m_CurrentTorque > m_FullTorqueOverAllWheels)
             {
                 m_CurrentTorque = m_FullTorqueOverAllWheels;
             }
         }
     }


     private bool AnySkidSoundPlaying()
     {
         for (int i = 0; i < 4; i++)
         {
             if (m_WheelEffects[i].PlayingAudio)
             {
                 return true;
             }
         }
         return false;
     }
 }

}

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avatar image nuckolls · May 22, 2017 at 07:51 PM 0
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Here is the second

using System; using UnityEngine; using UnityStandardAssets.CrossPlatformInput;

namespace UnityStandardAssets.Vehicles.Car { [RequireComponent(typeof (CarController))] public class CarUserControl : $$anonymous$$onoBehaviour { private CarController m_Car; // the car controller we want to use

     private void Awake()
     {
         // get the car controller
         m_Car = GetComponent<CarController>();
     }


     private void FixedUpdate()
     {
         // pass the input to the car!
         float h = CrossPlatformInput$$anonymous$$anager.GetAxis("Horizontal");
         float v = CrossPlatformInput$$anonymous$$anager.GetAxis("Vertical");

if !$$anonymous$$OBILE_INPUT

        float handbrake = CrossPlatformInput$$anonymous$$anager.GetAxis("Jump");
         m_Car.$$anonymous$$ove(h, v, v, handbrake);

else

        m_Car.$$anonymous$$ove(h, v, v, 0f);

endif

    }
 }

}

avatar image ShadyProductions nuckolls · May 24, 2017 at 08:23 AM 0
Share

$$anonymous$$aybe you should tell us what the problem is?

avatar image nuckolls ShadyProductions · May 24, 2017 at 02:49 PM -1
Share

I need help with scripting a 2 player car game I'm very confused on the whole process

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