How do I add a simple jump function to this script?

Questions & Answers
1

I’m trying to figure out how to add a simple jump function to this script, and am totally lost. I’m trying to learn, but this is so foreign to me that I can’t figure it out. Perhaps if I had done the code myself, I may have had a better idea about all of it, but here it is. I did not write this code. I was simply given it and it works perfectly except my little ball cannot jump. Also, when I press “A” the ball moves right and “D” moves it left. Script below:

using UnityEngine;
using System.Collections;
[RequireComponent(typeof(Rigidbody))]

public class SphereMovement : MonoBehaviour
{
    [SerializeField] float speed = 1;
    Rigidbody rigidbodyInstance;
    float movementInput = 0;


    void Start()
    {
        rigidbodyInstance = GetComponent<Rigidbody>();
    }

    void Update()
    {
        GetMovementInput();
    }

    void FixedUpdate()
    {
        Move();
    }

    void GetMovementInput()
    {
        movementInput = Input.GetAxis("Horizontal");
    }

    void Move()
    {
        Vector3 direction = new Vector3(movementInput, 0.0f, 0.0f);
        rigidbodyInstance.AddForce(direction * speed);
    }
}

As I’ve stated, I did not write this. Any help would be much appreciated, so thank you in advance

2

2D:

using UnityEngine;
 using System.Collections;
 
 public class Jump : MonoBehaviour {
     public bool grounded = true;
     public float jumpPower = 1;
     // Use this for initialization
     void Start () {
         
     }
     
     // Update is called once per frame
    void Update () {
     if(!grounded && rigidbody2D.velocity.y == 0) {
         grounded = true;
     }
     if (Input.GetButtonDown("Jump") && grounded == true) {
         rigidbody2D.AddForce(transform.up*jumpPower);
         grounded = false;
     }
 }

3D:

void FixedUpdate ()
{

if (Input.GetButton("Jump") && isFalling == false)
{
              playerRigidbody.velocity = new Vector3(0f, jump, 0f);
              isFalling = true;
}

}

//to make sure you can’t jump while in mid-air I use the following:
void OnCollisionStay ()
{
isFalling = false;
}

3

I really appreciate your help, but for the life of me, I can’t get it to work. I wanted to be able to add a line or however many into the existing code, but that’s impossible at this stage for me. I tried making news scripts to get your code to work and for some reason, it doesn’t. Keeps giving me parsing errors and such. Either way, once again, I appreciate the help