Touch Input Script

I was following the tutorial by Mr. Buckner on moving the space shooter game to mobile. I copied the scripts and followed the video exactly. I am making a pong game and used the scripts for moving the pong paddle with my finger. The problem I am having is the paddle does not follow my finger exactly. It just moves in the direction I move my finger. My question is did I do something wrong or is there a better way to go about using the touch input.

Thank you

 

Code (CSharp):

1. using UnityEngine;
2. using UnityEngine.UI;
3. using UnityEngine.EventSystems;
4. using System.Collections;
5.  
6. public class TouchScreenControls : MonoBehaviour, IPointerDownHandler, IDragHandler, IPointerUpHandler {
7.  
8.     public float smoothing;
9.  
10.     private Vector2 origin;
11.     private Vector2 direction;
12.     private Vector2 smoothDirection;
13.     private bool touched;
14.     private int pointerID;
15.  
16.     void Awake () {
17.         direction = Vector2.zero;
18.         touched = false;
19.     }
20.  
21.     public void OnPointerDown (PointerEventData data) {
22.         if (!touched) {
23.             touched = true;
24.             pointerID = data.pointerId;
25.             origin = data.position;
26.         }
27.     }
28.  
29.     public void OnDrag (PointerEventData data) {
30.         if (data.pointerId == pointerID) {
31.             Vector2 currentPosition = data.position;
32.             Vector2 directionRaw = currentPosition - origin;
33.             direction = directionRaw.normalized;
34.         }
35.     }
36.  
37.     public void OnPointerUp (PointerEventData data) {
38.         if (data.pointerId == pointerID) {
39.             direction = Vector3.zero;
40.             touched = false;
41.         }
42.     }
43.  
44.     public Vector2 GetDirection () {
45.         smoothDirection = Vector2.MoveTowards (smoothDirection, direction, smoothing);
46.         return smoothDirection;
47.     }
48. }

Code (CSharp):

1. using UnityEngine;
2. using System.Collections;
3. using UnityEngine.EventSystems;
4. using UnityEngine.UI;
5.  
6. public class PlayerControls : MonoBehaviour {
7.  
8. //    public KeyCode moveUp = KeyCode.UpArrow;
9. //    public KeyCode moveDown = KeyCode.DownArrow;
10.  
11.     public float speed = 10.0f;
12.  
13.     public TouchScreenControls pad;
14.  
15.     void FixedUpdate()
16.     {
17.  
18.         Vector2 direction = pad.GetDirection ();
19.         Vector3 movement = new Vector3 (0.0f, direction.y, 0.0f);
20.         GetComponent<Rigidbody2D>().velocity = movement * speed;
21.     }
22. }    

 

Ok, the other one is being moderated for some reason

 

It wouldnt let me put the code in the original post. It says its inappropriate. I posted the second script under the first one

 

maybe it is because your smoothing

Code (CSharp):

1. public float smoothing;

is to small give it a higher value in the Inspector.

http://docs.unity3d.com/ScriptReference/Vector2.MoveTowards.html

 

I tried that already. Didn't fix the issue. Just made the paddle jump faster or slower once it responded. It didn't follow my finger any better.

 

if you want the padle to follow exatly your finger you need to transform the toucharea (your display pixel resulution) to the gameworld position

Code (CSharp):

1.         GameObject padle;
2.  
3.  
4.         void Update()
5.         {
6.             if(Input.touchCount > 0)
7.             {
8.                 Vector2 touchPos = Input.touches[0].position;
9.                 Vector3 touchPosinWorldSpace = Camera.main.ScreenToWorldPoint(new Vector3(touchPos.x, touchPos.y, Camera.main.nearClipPlane));
10.                 padle.transform.position = touchPosinWorldSpace;
11.             }
12.         }

 

That works. Thank you, It does bring up a few other problems though. Is there a way to keep it from moving across the x axis. I only want it to move up and down and keep the touches in the touch pad area I designate? Is this possible?

 

yes, transform.position and touchPosinWorldSpace are a Vector3 so they have x, y and z axis.

in the above Scipt you just need to fix the x value. For the left padle different than the right paddle of course.

Code (CSharp):

1.             GameObject padle;
2.  
3. public float padlePosX = 2f;
4.  
5.             void Update()
6.             {
7.                 if(Input.touchCount > 0)
8.                 {
9.                     Vector2 touchPos = Input.touches[0].position;
10.                     Vector3 touchPosinWorldSpace = Camera.main.ScreenToWorldPoint(new Vector3(touchPos.x, touchPos.y, Camera.main.nearClipPlane));
11.  
12.                     touchPosinWorldSpace.x = padlePosX ;
13.                     padle.transform.position = touchPosinWorldSpace;
14.                 }
15.             }
16.  

 

Thank you so much for your help. Everything works perfectly now!!