Rotate game object on swipe

I've got a game object in my scene that when I move my finger across the screen, I want the object to rotate in that direction. It's a cube on screen, and sliding my finger around on the screen should rotate the cube about the center point, but not move the cube's position. It should only rotate as long as they are actively swiping.

I'm basically trying to replicate 3D minesweeper.

I'm very familiar with C# development but I have almost no experience with unity or 3d development.

 

You need something like this:
http://touchscript.github.io/

And this:
https://unity3d.com/learn/tutorials/modules/beginner/scripting/translate-and-rotate

Good luck. This is not very easy to get right.

 

Code (CSharp):

1. using UnityEngine;
2. using System.Collections;
3. using UnityEngine.EventSystems;
4.  
5. public class CharacterRotating : MonoBehaviour
6. {
7.     [SerializeField]
8.     private Camera cam;
9.  
10.     [SerializeField]
11.     private Quaternion defaultAvatarRotation;
12.  
13.     [SerializeField]
14.     private float slowSpeedRotation = 0.03f;
15.     [SerializeField]
16.     private float speedRotation = 0.03f;
17.  
18.     private const string AVATAR_TAG = "avatar_model";
19.  
20.     private bool isRotating = false;
21.  
22.     private RaycastHit hit;
23.  
24.     void Awake()
25.     {
26.         Camera[] cameraList = FindObjectsOfType(typeof(Camera)) as Camera[];
27.         foreach (Camera camObj in cameraList)
28.         {
29.             if(camObj && camObj.tag == "Untagged")
30.             {
31.                 cam = camObj;
32.             }
33.         }
34.         defaultAvatarRotation.y = 180.0f;
35.     }
36.  
37.     // Update is called once per frame
38.     void Update()
39.     {
40.         MouseButtonDown();
41.         MouseButotnUp();
42.         if (Input.GetMouseButton(0) && isRotating)
43.         {
44.             RaycastHit dragingHit;
45.  
46. #if UNITY_EDITOR
47.             Ray ray = cam.ScreenPointToRay(Input.mousePosition);
48. #elif UNITY_ANDROID
49.  
50.             Ray ray = cam.ScreenPointToRay(Input.touches[0].position);
51. #endif
52.             if(Physics.Raycast(ray, out dragingHit) && dragingHit.collider.gameObject == hit.collider.gameObject)
53.             {
54.                 if(hit.collider.tag == AVATAR_TAG && transform == hit.collider.transform)
55.                 {
56.  
57. #if UNITY_EDITOR
58.                     float x = -Input.GetAxis("Mouse X");
59. #elif UNITY_ANDROID
60.  
61.                     float x = -Input.touches[0].deltaPosition.x;
62. #endif
63.                     transform.rotation *= Quaternion.AngleAxis(x * speedRotation, Vector3.up);
64.                 }
65.             }
66.         }
67.         else
68.         {
69.             if(transform.rotation.y != defaultAvatarRotation.y)
70.             {
71.                 SlowRotation();
72.             }
73.         }
74.     }
75.  
76.     private void MouseButtonDown()
77.     {
78.         if(Input.GetMouseButtonDown(0))
79.         {
80.  
81. #if UNITY_EDITOR
82.         Ray ray = cam.ScreenPointToRay(Input.mousePosition);
83. #elif UNITY_ANDROID
84.         Ray ray = cam.ScreenPointToRay(Input.touches[0].position);
85. #endif
86.             if(Physics.Raycast(ray, out hit))
87.             {
88.                 if(hit.collider.tag == AVATAR_TAG && transform == hit.collider.transform)
89.                 {
90.                     isRotating = true;
91.                 }
92.             }
93.         }
94.     }
95.  
96.     private void MouseButotnUp()
97.     {
98.         if(Input.GetMouseButtonUp(0))
99.         {
100.             isRotating = false;
101.             hit = new RaycastHit();
102.         }
103.     }
104.  
105.     private void SlowRotation()
106.     {
107.         transform.rotation = Quaternion.Slerp(transform.rotation,
108.                                               defaultAvatarRotation,
109.                                               slowSpeedRotation * Time.deltaTime);
110.     }
111. }

If you need I can make a small test project for more understanding of this code.

 

Simple way:

Code (CSharp):

1.     public Transform cube;
2.  
3.     void Update()
4.     {
5.         if (Input.touchCount == 1)
6.         {
7.             // GET TOUCH 0
8.             Touch touch0 = Input.GetTouch(0);
9.  
10.             // APPLY ROTATION
11.             if (touch0.phase == TouchPhase.Moved)
12.             {
13.                 cube.transform.Rotate(0f, touch0.deltaPosition.x, 0f);
14.             }
15.  
16.         }
17.     }

 

Hey Byelik, I know this was posted a while ago but I'm interested in doing the same thing, is your offer to make a sample project still on the table?

 

tha

nks bro

 

Code (CSharp):

1. private Vector2 startPos,direction;
2.     private float multiplierY=0.02f;
3.     private float multiplierX=0.02f;
4.  
5.     void Awake()
6.     {
7.         instance=this;
8.     }
9.     void Update()
10.     {
11.         if(Input.touchCount>0)
12.         {
13.             Touch touch = Input.GetTouch(0);
14.  
15.             switch (touch.phase)
16.             {
17.                 case TouchPhase.Began:
18.                     startPos = touch.position;
19.                     direction=Vector3.zero;
20.                     break;
21.  
22.                 case TouchPhase.Moved:
23.                     direction = touch.position - startPos;
24.                     if(direction.magnitude>0.05f)
25.                     {
26.                         // var localAngles=this.transform.localEulerAngles;
27.                         // localAngles.y+=direction.y*multiplierY;
28.                         // this.transform.localEulerAngles=localAngles;
29.      
30.                         var globalAngles=this.transform.eulerAngles;
31.                         globalAngles.y+=-direction.x*multiplierX;
32.                         this.transform.eulerAngles=globalAngles;
33.  
34.                         var dotVal1= Vector3.Dot(Camera.main.transform.forward,this.transform.right);
35.                         var dotVal2= Vector3.Dot(Camera.main.transform.forward,this.transform.up);
36.                         var dotVal3= Vector3.Dot(Camera.main.transform.right,this.transform.up);
37.                      
38.  
39.                         // Debug.Log("Value"+(dotVal>0?true:false));
40.                         // MyDebug.Log("Value"+(dotVal>0?true:false));
41.  
42.                         this.transform.localRotation*=Quaternion.Euler(0,-direction.y*multiplierY*(dotVal1>0?-1:1)*(dotVal1>0?-1:1)*(dotVal3>0?-1:1),0);
43.                     }
44.                     break;
45.  
46.                 case TouchPhase.Ended:
47.                 case TouchPhase.Canceled:
48.                     break;
49.             }
50.         }
51.     }

Try out this. It will work properly just like swipe to rotate on phones. Just drag this object on the gameobject you want to rotate using swipe

 

Here's my contribution from a few years back, full package, scripts, scenes, setup, etc.