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

Question

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

Answer 1

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; }

Answer 2

Answer by Buliaras · Apr 19, 2016 at 02:39 AM

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

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

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