Movement Script

Unity Engine
1

First off I do not know if this is the right forum for this thread, what I am trying to do is make a script that test for a key pressed and add force to the object, I am very new to C# and Unity. The a and d key being pressed works, but when I press w and s it moves the object in the same way as the a and d keys. I took the code from a different project and tried to make it work for this, but I was not sure if I changed the right things.

using UnityEngine;

public class PlayerMovement : MonoBehaviour
{

    // This is a refference to the Rigidbody component and it is called "rb"
    public Rigidbody rb;

    public float forwardForce = 500f;
    public float sidewarsForce = 500f;

    // Marked as FixedUpdate because unity likes that when messing around with physics
    void FixedUpdate()
    {
        if (Input.GetKey("w"))
        {
            rb.AddForce(forwardForce * Time.deltaTime, 0, 0, ForceMode.VelocityChange);
        }                                                    // If statement only executed if condition is met
        if (Input.GetKey("d"))
        {
            rb.AddForce(sidewarsForce * Time.deltaTime, 0, 0, ForceMode.VelocityChange);
        }

        if (Input.GetKey("a"))
        {
            rb.AddForce(-sidewarsForce * Time.deltaTime, 0, 0, ForceMode.VelocityChange);
        }
        if (Input.GetKey("s"))
        {
            rb.AddForce(-forwardForce * Time.deltaTime, 0, 0, ForceMode.VelocityChange);
        }
    }
}

-Mango

2

You are adding the force to the same part of the vector3. In the first one, you are adding it to the xposition, the first part of the vector.
forwardForce * Time,0,0

for sideways, you want the z portion of the vector
0,0,sidewarsForce*Time…

I’m surprised it works like that without an actual vector3, but if it’s working in one direction, it must be all right.

3

It’s just an overloaded version of AddForce that takes discrete axes values:

public void AddForce(float x, float y, float z, ForceMode mode = ForceMode.Force);

But your answer is absolutely the correct thing to fix OP’s original problem.

4

thanks