my car isn't moving

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1

hi, i’m just trying to learn how to use WheelCollider.motorTorque , and i saw this script somewhere around

    public WheelCollider fr;
public WheelCollider fl;
public WheelCollider br;
public WheelCollider bl;

public float speed = 10.0f;
public float steerSpeed = 10.0f;

public GameObject COM;

int gear = 4;

void Start ()
{
    rigidbody.centerOfMass = COM.transform.localPosition;
    rigidbody.angularDrag = 10;

    br.motorTorque = 30;
    bl.motorTorque = 30;
}

void Update ()
{
    if (Input.GetKeyDown("1"))
    {
        gear = 1;
    }

    if (Input.GetKeyDown ("2")) 
    {
        gear = 2;
    }

    if (Input.GetKeyDown ("3"))
    {
        gear = 3;
    }

    if (Input.GetKeyDown("4"))
    {
        gear = 4;
    }
}

void FixedUpdate()
{
    fr.steerAngle = Input.GetAxis("Horizontal") * steerSpeed;
    fl.steerAngle = Input.GetAxis("Horizontal") * steerSpeed;

    br.motorTorque = Input.GetAxis("Vertical") * speed * gear;
    bl.motorTorque = Input.GetAxis("Vertical") * speed * gear;

    
}

so i made a box and some clyinders to make them a car and an empety GameObject to be the COM and centered it to all the wheels to test this script(i didn’t parent any thing)

and i tested it but the wheels doesn’t move, the front wheel’s WheelCollider is rotating well but it never moves, sorry for being so stupid >,< :slight_smile:

You may be better off starting with the Car Tutorial, it's free on the Asset Store.

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Sorry, but for me at least, it's easier to help people after they have learned something from a book. I'm lazy see. Best of luck.

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1 Answer

1
2

It is because you are not updating the motorTorque on the fixed update… I imagine your car moving a bit after a torque of 30 is applied but I also think that your car is heavy to be moved by a torque of 30… try something like 1000.0f… just imagining, not sure if it’ll work