How to make brake car ?

Question

Hi ! Its me again :D. I have a problem with my car script. I want make when I press arrow down my car slow down but when i press Space my car 'simulate handbraking' but I dont know how to make this.

In this script my car slow down but veeeery slow. Someone want to help me? Thank you for any help.

I using script from this video: https://www.youtube.com/watch?v=xQcJAa6Ooa4

Script C#:

 using UnityEngine;
 using System.Collections;
 
 public class RearWheelDriveXp : MonoBehaviour
 {
 
     private WheelCollider[] wheels;
 
     public float maxAngle = 30;
     public float maxTorque = 300;
 
     public float topSpeed = 100; // km per hour
     public float currentSpeed = 0;
     private float pitch = 4f;
 
     public Transform visualCar;
 
     public GameObject CarEngine;
 
     // here we find all the WheelColliders down in the hierarchy
     public void Start()
     {
         wheels = GetComponentsInChildren<WheelCollider>();
         GetComponent<Rigidbody>().centerOfMass = visualCar.localPosition;
     }
 
     // this is a really simple approach to updating wheels
     // here we simulate a rear wheel drive car and assume that the car is perfectly symmetric at local zero
     // this helps us to figure our which wheels are front ones and which are rear
     public void Update()
     {
 
 
         float angle = maxAngle * Input.GetAxis("Horizontal");
         float torque = maxTorque * Input.GetAxis("Vertical");
 
         foreach (WheelCollider wheel in wheels)
         {
             // a simple car where front wheels steer while rear ones drive
             if (wheel.transform.localPosition.z > 0)
                 wheel.steerAngle = angle;
 
             if (wheel.transform.localPosition.z < 0)
                 wheel.motorTorque = torque;
 
             // update visual wheels if any
             {
                 Quaternion q;
                 Vector3 p;
                 wheel.GetWorldPose(out p, out q);
 
                 // assume that the only child of the wheelcollider is the wheel shape
                 Transform shapeTransform = visualCar.FindChild(wheel.name);
                 shapeTransform.position = p;
                 shapeTransform.rotation = q;
             }
 
         }
 
         // CURRENT SPEED
         currentSpeed = GetComponent<Rigidbody>().velocity.magnitude;
 
         pitch = currentSpeed / topSpeed;
         CarEngine.GetComponent<AudioSource>().pitch = pitch + 0.5f;
     }
 
     public void FixedUpdate()
     {
         if (currentSpeed > topSpeed)
         {
             GetComponent<Rigidbody>().velocity = GetComponent<Rigidbody>().velocity.normalized * topSpeed;
         }
     }
 }

Answer 1

Best Answer

Answer by DevsGoingViral · Jan 08, 2017 at 10:50 PM

Hi,you can do something like this for stopping the car:

 var Brakes : float;
 
 function Update(){
 Brakes = 0;
          if (Input.GetKey(KeyCode.Space) == true){
              Brakes = 300;
          }
        for(var WC:WheelCollider in wheelcolliders){
          WC.brakeTorque = Brakes;
         }
 }

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DevsGoingViral · Jan 08, 2017 at 10:59 PM 0

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This whole code will work.You just needed to specify in what case "brakeTourque" is 300,in this code example it is when space bar is pressed like you wanted :).In function update "Brakes = 0" will make sure you don't apply any braking power until you hit spacebar.

Mativve DevsGoingViral · Jan 09, 2017 at 02:25 PM 0

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@mika123 Thank you soooooooo much! You're awesome! :D

DevsGoingViral Mativve · Jan 11, 2017 at 11:36 PM 0

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No problem man,thank you. \e/

Answer 2

@mika123 I use http://www.m2h.nl/files/js_to_c.php to convert :D but i have next problem. My car don't want go. Nothing happens. What I do wrong ?

I paste your script in Update() function. Script look that:

     // here we find all the WheelColliders down in the hierarchy
     public void Start()
     {
         wheels = GetComponentsInChildren<WheelCollider>();
         GetComponent<Rigidbody>().centerOfMass = visualCar.localPosition;
     }
 
     // this is a really simple approach to updating wheels
     // here we simulate a rear wheel drive car and assume that the car is perfectly symmetric at local zero
     // this helps us to figure our which wheels are front ones and which are rear
     public void Update()
     {
 
 
         float angle = maxAngle * Input.GetAxis("Horizontal");
         float torque = maxTorque * Input.GetAxis("Vertical");
 
         foreach (WheelCollider WC in wheels)
         {
             WC.brakeTorque = 300; // anything of high value will do,low value will make car      //gradually slow down
         }
 
         foreach (WheelCollider wheel in wheels)
         {
             // a simple car where front wheels steer while rear ones drive
             if (wheel.transform.localPosition.z > 0)
                 wheel.steerAngle = angle;
 
             if (wheel.transform.localPosition.z < 0)
                 wheel.motorTorque = torque;
 
             // update visual wheels if any
             {
                 Quaternion q;
                 Vector3 p;
                 wheel.GetWorldPose(out p, out q);
 
                 // assume that the only child of the wheelcollider is the wheel shape
                 Transform shapeTransform = visualCar.FindChild(wheel.name);
                 shapeTransform.position = p;
                 shapeTransform.rotation = q;
             }
 
         }

How to make brake car ?

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