Brtdku

I'm creating an Android game with Unity. There are only three ways to control the movement of the character:

• Tap in the right half of the screen: jump to the right


• Tap in the left half of the screen: jump to the left


• Swipe upwards: character dashes forward

In theory, I know that I can differentiate the touches with the TouchPhases (began, moved, stationary and ended). When only detecting the taps without caring for swipes, I just checked if the phase of the touch began and made the player jump. That felt fast on my device.

However, because I have to consider that a swipe may follow, I can not initiate the jump action until I detected ThouchPhase.Ended. This leads to a very slow responding character, which doesnt jump until the user rises his finger of the screen.

I tried to use ThouchPhase.Moved and ThouchPhase.Stationary instead to simulate a immediate response but my solution is pretty bad in terms of detecting the difference between a tap and a swipe:

Vector2 startTouchPosition;

Vector2 endTouchPosition;

Vector2 currentSwipe;



void Update()

{

    if (Input.touches.Length > 0)

    {

        for (int i = 0; i < Input.touchCount; i++)

        {

            Touch touch = Input.GetTouch(i);



            if (touch.phase == TouchPhase.Began)

            {

                //save began touch 2d point

                startTouchPosition = new Vector2(touch.position.x, touch.position.y);

            }



            if (touch.phase == TouchPhase.Moved || touch.phase == TouchPhase.Stationary)

            {

                //save ended touch 2d point

                endTouchPosition = new Vector2(touch.position.x, touch.position.y);



                if (endTouchPosition.y - startTouchPosition.y < 5)

                {

                    if (touch.position.x > (Screen.width / 2))

                    {

                        JumpToRight();

                    }

                    else if (touch.position.x < (Screen.width / 2))

                    {

                        JumpToLeft();

                    }

                }

                else

                {

                    //create vector from the two points

                    currentSwipe = new Vector2(endTouchPosition.x - startTouchPosition.x, endTouchPosition.y - startTouchPosition.y);



                    //normalize the 2d vector

                    currentSwipe.Normalize();



                    //swipe upwards

                    if (currentSwipe.y > 0 && currentSwipe.x > -0.5f && currentSwipe.x < 0.5f)

                    {

                        DashForward();

                    }

                }

            }

        }

    }

}

Here is the code I used. I tested and it works but sometimes, I noted a delay. Let me know if it is good enough for you. Basically you dont need to go through all touches if you dont need multi-touch. And you just need Begin and End touch phases.

using System.Collections;

using System.Collections.Generic;

using UnityEngine.UI;

using UnityEngine;



public class touch : MonoBehaviour {

private Vector2 startTouchPosition;

private Vector2 endTouchPosition;

private Vector2 currentSwipe;

public Text textbox;

// Use this for initialization

void Start () {



}



// Update is called once per frame

void Update () {

    if (Input.touches.Length > 0)

    {



        Touch touch = Input.GetTouch(0);



        if (touch.phase == TouchPhase.Began)

        {

            //save began touch 2d point

            startTouchPosition = new Vector2(touch.position.x, touch.position.y);

        }



        if (touch.phase == TouchPhase.Ended)

        {

            //save ended touch 2d point

            endTouchPosition = new Vector2(touch.position.x, touch.position.y);

            //create vector from the two points

            currentSwipe = new Vector2(endTouchPosition.x - startTouchPosition.x, endTouchPosition.y - startTouchPosition.y);



                //normalize the 2d vector

            currentSwipe.Normalize();

            if(Mathf.Abs(currentSwipe.y) < 0.1f && Mathf.Abs(currentSwipe.x) < 0.1f)

            {

                if (touch.position.x > (Screen.width / 2))

                {

                    textbox.text= "jump right";

                }

                else if (touch.position.x < (Screen.width / 2))

                {

                    textbox.text= "jump left";



                }

            }

            if (currentSwipe.y > 0 && currentSwipe.x > -0.5f && currentSwipe.x < 0.5f)

            {

                textbox.text= "Dash forward";



            }

        }

    }

  }

}