How to convert keyboard controls to touch screen in Unity - unity3d

Question

Complete newbie here. Using Unity C#. I'm looking at moving my PONG game from keyboard control to touch screen. Here is my working keyboard code:
// Player 1 => Controls left bat with W/S keys
public GameObject leftBat;
// Use this for initialization
void Start () {
}
// Update is called once per frame
void Update () {
//Defualt speed of the bat to zero on every frame
leftBat.GetComponent<Rigidbody>().velocity = new Vector3(0f, 0f, 0f);
//If the player is pressing the W key...
if (Input.GetKey (KeyCode.W)) {
//Set the velocity to go up 1
leftBat.GetComponent<Rigidbody>().velocity = new Vector3(0f, 8f, 0f);
}
//If the player is pressing the S key...
else if (Input.GetKey (KeyCode.S)) {
//Set the velocity to go down 1 (up -1)
leftBat.GetComponent<Rigidbody>().velocity = new Vector3(0f, -8f, 0f);
}
}
I found this code and been playing around with it but to now avail.
using UnityEngine;
using System.Collections;
public class Player_Input_Controller : MonoBehaviour {
public GameObject leftBat;
public float paddleSpeed = 1f;
public float yU;
public float yD;
private Ray ray;
private RaycastHit rayCastHit;
private Vector3 playerPos = new Vector3(0, -9.5f, 0);
// Update is called once per frame
void Update () {
if (Input.GetMouseButton (0))
{
ray = Camera.main.ScreenPointToRay(Input.mousePosition);
if(Physics.Raycast(ray, out rayCastHit)){
Vector3 position = rayCastHit.point;
float yPos = position.y;
playerPos = new Vector3(Mathf.Clamp(yPos, yU, yD), -9.5f, 0f);
transform.position = playerPos;
}
}
}
}
Any one have a touchscreen Pong script I could use, or know how to edit this one?
Again, I'm really new and I'm sorry if I look like the Dummy in the class.
Thanks for any help provided. I REALLY appreciate it. This is the last hurdle in completing my game.

Answer 1

In my opinion, you do not need any raycasting. Because you are working in 2D and you are only concerned about the y value of Input.mousePosition. Therefore, you can calculate the extent of your screen using your camera's z value. If your camera is at (0, 0, -10) lets say your extents in the game will be -5 - BatOffset to 5+BatOffset in your world coordinates. Therefore, you somehow need a function to map Screen.height to your world coordinate extents as you can see from the image.
In conclusion you need to find Input.mousePosition.y divide it to Screen.height. This will give you the ratio where you touch or click. Then find the position in world space.
Note that: you can also use Input.touchPosition.y. Following script will work for you to do this operation:
public GameObject cam;
private Vector3 batPos;
private float minY;
private float maxY;
private int Res;
private float deltaY;
void Start () {
minY = cam.transform.position.z / 2 - gameObject.transform.localScale.y;
maxY = (-cam.transform.position.z / 2) + gameObject.transform.localScale.y;
deltaY = maxY - minY;
Debug.Log(minY + " " + maxY + " " + deltaY);
Res = Screen.height;
batPos = gameObject.transform.position;
}
void Update () {
if(Input.GetMouseButtonDown(0))
{
// we find the height we have to go up from minY
batPos.y =minY + Input.mousePosition.y / Res * deltaY;
gameObject.transform.position = batPos;
}
}
This works for me in the editor when you click on screen with mouse. You just have to change the parts Input.GetMouseButtonDown to Touch commands such as Touch.tapCount > 0. Also this script should be attached to the bat. Good luck!
Also You can use Orthographic camera and Orthographic camera size instead of cam.transformation.z

Answer 2

May be helpfull
create script. for example player.cs
public class PlayerController : MonoBehaviour
{
bool swipeRight = false;
bool swipeLeft = false;
bool touchBlock = true;
bool canTouchRight = true;
bool canTouchLeft = true;
void Update()
{
swipeLeft = Input.GetKeyDown("a") || Input.GetKeyDown(KeyCode.LeftArrow);
swipeRight = Input.GetKeyDown("d") || Input.GetKeyDown(KeyCode.RightArrow);
TouchControl();
if(swipeRight) //rightMove logic
else if(swipeLeft) //leftMove logic
}
void TouchControl()
{
if(Input.touchCount == 1 && Input.GetTouch(0).phase == TouchPhase.Began )
{
//Jump logic
}
else if (Input.touchCount > 0 && Input.GetTouch(0).phase == TouchPhase.Moved && touchBlock == true)
{
touchBlock = false;
// Get movement of the finger since last frame
var touchDeltaPosition = Input.GetTouch(0).deltaPosition;
Debug.Log("touchDeltaPosition "+touchDeltaPosition);
if(touchDeltaPosition.x > 0 && canTouchRight == true)
{
//rightMove
swipeRight = true; canTouchRight = false;
Invoke("DisableSwipeRight",0.2f);
}
else if(touchDeltaPosition.x < 0 && canTouchLeft == true)
{
//leftMove
swipeLeft = true; canTouchLeft = false;
Invoke("DisableSwipeLeft",0.2f);
}
}
}
void DisableSwipeLeft()
{
swipeLeft = false;
touchBlock = true;
canTouchLeft = true;
}
void DisableSwipeRight()
{
swipeRight = false;
touchBlock = true;
canTouchRight = true;
}
}