c# SwipeController (for mobile)

hi there!
I created a script that hopefully will help alot of people with their project.
with this script you can create your own 2d paper toss like game.
with a few simple steps every one can use this.

the script:

Spoiler: SwipeControllerV1

Code (CSharp):

1. using UnityEngine;
2.  
3. public class SwipeControllerV1 : MonoBehaviour
4. {
5.     public GameObject PrefabObj; //The object that will be spawned
6.     public float calcSpeed; //A var to calculate the speed
7.     public bool isSpawned = false;
8.  
9.     private float angle; //Calculate angle of the shot
10.     private float dist; //Distance of the swipe (to calculate speed)
11.     private Vector3 fp;   //First touch position
12.     private Vector3 lp;   //Last touch position
13.     private float dragDistance;  //minimum distance for a swipe to be registered
14.  
15.     void Start()
16.     {
17.         dragDistance = Screen.height * 15 / 100; //dragDistance is 15% height of the screen
18.     }
19.  
20.     void Update()
21.     {
22.         if (Input.touchCount == 1) // user is touching the screen with a single touch
23.         {
24.             Touch touch = Input.GetTouch(0); // get the touch
25.             if (touch.phase == TouchPhase.Began) //check for the first touch
26.             {
27.                 fp = touch.position;
28.                 lp = touch.position;
29.             }
30.             else if (touch.phase == TouchPhase.Moved) // update the last position based on where they moved
31.             {
32.                 lp = touch.position;
33.             }
34.             else if (touch.phase == TouchPhase.Ended) //check if the finger is removed from the screen
35.             {
36.                 lp = touch.position;  //last touch position. Ommitted if you use list
37.  
38.                 //Check if drag distance is greater than 20% of the screen height
39.                 if (Mathf.Abs(lp.x - fp.x) > dragDistance || Mathf.Abs(lp.y - fp.y) > dragDistance)
40.                 {//It's a drag
41.                     dist = Vector3.Distance(fp, lp); //Calculate distance
42.                     dist = dist * calcSpeed; //Calculate speed based on distance
43.                     Vector3 pos = lp - fp; //Calculate difference between the 2 locations
44.                     angle = Mathf.Atan2(pos.y, pos.x) * Mathf.Rad2Deg; //Use the difference to calculate the angle
45.                     //Debug.Log("angle: " + angle);
46.                     //Debug.Log("dist: " + dist);
47.                     SpawnObject(); //Spawning the object
48.                 }
49.                 else
50.                 {   //It's a tap as the drag distance is less than 20% of the screen height
51.                     Debug.Log("Tap");
52.                 }
53.  
54.                 if (isSpawned == true)
55.                 {   //If there already is a ball in the game
56.                     GameObject Obj = GameObject.FindGameObjectWithTag("Projectile"); //Find the GameObject
57.                     Destroy(Obj); //Destroying the GameObject
58.                     isSpawned = false; //Now another one can be spawned
59.                 }
60.             }
61.         }
62.     }
63.     void SpawnObject()
64.     {
65.         if (isSpawned == false)
66.         {
67.             GameObject Obj = Instantiate(PrefabObj, this.transform.position, Quaternion.identity) as GameObject; //Instantiate a gameObject on the location of the gameobject where this script is connected to.
68.             if (Obj.tag != null)
69.             {   //Check if the Object Prefab doesn't has a tag
70.                 Obj.tag = "Projectile"; //Giving the Object the Tag
71.             }
72.             Vector3 dir = Quaternion.AngleAxis(angle, Vector3.forward) * Vector3.right; //Calculate the direction of where it is going to shoot
73.             Obj.GetComponent<Rigidbody>().AddForce(dir * dist); //Give force to the Object to shoot it
74.         }
75.     }
76. }

to use this you need to place this script onto your game object which will shoot (example: a canon)
make a prefab out of the projectile and "drag&drop" it in the "prefab Obj" slot.
give the object which holds this script the tag "SwipeController".
set the calc speed to whatever you like and just play.

now you can shoot infinite projectiles they wont go away.
to fix this (and also to give them gravity) add this script to the projectile.

the script:

Spoiler: PrefabObj

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. public class PrefabObj : MonoBehaviour {
6.     public float gravPower = 0.0f;
7.  
8.     private void Start()
9.     {
10.         GameObject theObject = GameObject.FindGameObjectWithTag("SwipeController"); //find the object with the SwipeController script
11.         SwipeController sc = theObject.GetComponent<SwipeController>();//Connect with the SwipeController script
12.         sc.isSpawned = true; //Setting the Bool of the SwipeController script
13.    
14.     }
15.     void Update () {
16.         Physics.gravity = new Vector3(0, gravPower, 0); //Give gravity to the object
17.     }
18. }
19.  

now the projectile will disapear before a new one can be instantiated. (they disapear when you click or swipe on your screen)
give the object which holds this script the tag "Projectile".

dont forget the add the tags to the tag list!!
if there are any mistakes, problems or bugs please let me know!

enjoy your game!
PS: this can only be tested on a smartphone!

thanks alot for reading,
kelvin-w

 

Nice thanks for posting.

 

no problem