how to rotate a object on touch and stop it on next touch.

[satya144]

Hello everyone,
I am new to unity 3d and just started using javascript.I want my object to rotate when i touch it once and it should stop rotating when I touch it again.
Here is what i have written but my object rotates just once and stops,if i keep touching it it keeps rotating.
function Update () {

		if (Input.touchCount > 0){
		
		transform.Rotate(0,0,rotspeed*Time.deltaTime);
		
		switch(Input.GetTouch(0).phase)
		{
			case TouchPhase.Began:
			transform.Rotate(0,0,rotspeed*Time.deltaTime);
			
			case TouchPhase.Moved:
			// Get movement of the finger since last frame
			var touchDeltaPosition:Vector2 = Input.GetTouch(0).deltaPosition;
			
			// Move object across XY plane
			transform.Translate (touchDeltaPosition.x * speed, 
						touchDeltaPosition.y * speed, 0);
		}
		} 

Please help me out.

[AlucardJay]

FINAL EDIT : added GUI request from the comments

First, remember to separate your switch cases with a break;

The answer is to store all your rotating objects in a List. Here is a great resource on using List and Array in Unity : http://wiki.unity3d.com/index.php?title=Which_Kind_Of_Array_Or_Collection_Should_I_Use?

I don’t have any way to test this on a touch device, so I have written it to work with a mouse while running in the editor. It compiles and is tested and working, so it should (hopefully) work when built out to a device.

Again, I have left a lot of comments throughout the process, hopefully this will give you a starting point to writing your own code specific to your needs.

• create a new scene
• create some cubes at random positions

attach this script to an empty gameObject or the camera :

//------------------------------//
//  TouchDragAndRotate.js       //
//  Written by Alucard Jay      //
//  12/13/2013                  //
//------------------------------//

#pragma strict

// to use List
import System.Collections.Generic;

public var rotationSpeed : float = 180.0;
public var moveSpeed : float = 0.05;

var touchedObject : Transform; // private var, left public for testing
var rotatingObjects : List.< Transform >; // private var, left public for testing

var textToShow : String = "";


function Start() 
{
	rotatingObjects = new List.< Transform >();
}


function Update() 
{
	// to use mouse inputs in the editor
	// and device touch inputs in build
	#if UNITY_EDITOR
	UsingMouseInputs();
	#else
	UsingTouchInputs();
	#endif
}


function OnGUI() 
{
	if ( textToShow != "" )
	{
		GUI.Box( Rect( Screen.width * 0.5 - 150, 10, 300, 25), textToShow );
	}
}


function ClearTextToShow() 
{
	textToShow = "";
}


// --


function UsingTouchInputs() 
{
	// has the screen got a touch?
	if ( Input.touchCount > 0 )
	{
		// what is the current state of the touch 0?
		switch( Input.GetTouch(0).phase )
		{
			case TouchPhase.Began :
				// get the touch position on the screen
				var touchPos : Vector3 = new Vector3( Input.GetTouch(0).position.x, Input.GetTouch(0).position.y, 0 );
				
				// create a Ray from the touch position
				var ray : Ray = Camera.main.ScreenPointToRay( touchPos );
				
				// create a RaycastHit variable to gather Raycast information
				var hit : RaycastHit;
				
				// cast a ray
				// ideally this would be done using a layermask
				if ( Physics.Raycast( ray, hit, 1000 ) )
				{
					// check the hit object by name
					// ideally this would be done by checking the tag
					if ( hit.collider.gameObject.name == "Cube" )
					{
						// if the object is a cube
						// store a reference to the object 
						touchedObject = hit.transform;
					}
				}
				
				// check if there are any items in the list
				if ( rotatingObjects.Count > 0 )
				{
					// check if the touchedObject is in the rotatingObjects list
					var inList : boolean = false;
					
					for ( var i : int = 0; i < rotatingObjects.Count; i ++ )
					{
						// if it is, then remove it from the list
						if ( rotatingObjects[ i ] == touchedObject )
						{
							rotatingObjects.RemoveAt( i );
							
							inList = true;
							
							textToShow = "You just stopped the cube!";
							CancelInvoke( "ClearTextToShow" );
							Invoke( "ClearTextToShow", 1.5 );
							
							break;
						}
					}
					
					// if not, add it to the list
					if ( !inList && touchedObject )
					{
						rotatingObjects.Add( touchedObject );
						
						textToShow = "That cube is now spinning!";
						CancelInvoke( "ClearTextToShow" );
						Invoke( "ClearTextToShow", 1.5 );
					}
				}
				else if ( touchedObject ) // list is empty, so add the object as it is not rotating
				{
					rotatingObjects.Add( touchedObject );
					
					textToShow = "That cube is now spinning!";
					CancelInvoke( "ClearTextToShow" );
					Invoke( "ClearTextToShow", 1.5 );
				}
			break;
			
			case TouchPhase.Moved :
				// check if there is a gameObject stored in the variable
				if ( touchedObject )
				{
					// Get movement of the finger since last frame
					var touchDeltaPosition : Vector2 = Input.GetTouch(0).deltaPosition;
					
					// Move object across XY plane
					//touchedObject.Translate( touchDeltaPosition.x * moveSpeed, touchDeltaPosition.y * moveSpeed, 0 );
					touchedObject.position += new Vector3( touchDeltaPosition.x * moveSpeed, touchDeltaPosition.y * moveSpeed, 0 );
				}
			break;
			
			case TouchPhase.Stationary :
				
			break;
			
			case TouchPhase.Ended :
				// remove the reference to the gameObject
				touchedObject = null;
			break;
			
			default : // TouchPhase.Cancelled
				// remove the reference to the gameObject
				touchedObject = null;
			break;
		}
	}
	
	
	// check if there are any items in the list
	// if so, rotate the objects
	if ( rotatingObjects.Count > 0 )
	{
		for ( var r : int = 0; r < rotatingObjects.Count; r ++ )
		{
			rotatingObjects[ r ].Rotate( 0, 0, rotationSpeed * Time.deltaTime );
		}
	}
}


// --


// enumerator to emulate touch phases
enum MousePhase
{
	Idle,
	Began,
	Stationary,
	Moved,
	Ended,
	Cancelled
}

var mouseTouchPhase : MousePhase;

var lastMousePos : Vector3;
var currMousePos : Vector3;


function UsingMouseInputs() 
{
	// using mouse as I have no provisioning profile for my touch device
	if ( Input.GetMouseButtonDown(0) )
	{
		mouseTouchPhase = MousePhase.Began;
	}
	else if ( Input.GetMouseButton(0) )
	{
		mouseTouchPhase = MousePhase.Moved;
	}
	else if ( Input.GetMouseButtonUp(0) )
	{
		mouseTouchPhase = MousePhase.Ended;
	}
	else
	{
		mouseTouchPhase = MousePhase.Idle;
	}
	
	
	// get the touch position on the screen
	var touchPos : Vector3 = Input.mousePosition;
	
	lastMousePos = currMousePos;
	currMousePos = touchPos;
	
	
	// what is the current state of the touch 0?
	switch( mouseTouchPhase )
	{
		case MousePhase.Began :
			// create a Ray from the touch position
			var ray : Ray = Camera.main.ScreenPointToRay( touchPos );
			
			// create a RaycastHit variable to gather Raycast information
			var hit : RaycastHit;
			
			// cast a ray
			// ideally this would be done using a layermask
			if ( Physics.Raycast( ray, hit, 1000 ) )
			{
				// check the hit object by name
				// ideally this would be done by checking the tag
				if ( hit.collider.gameObject.name == "Cube" )
				{
					// if the object is a cube
					// store a reference to the object 
					touchedObject = hit.transform;
				}
			}
			
			// check if there are any items in the list
			if ( rotatingObjects.Count > 0 )
			{
				// check if the touchedObject is in the rotatingObjects list
				var inList : boolean = false;
				
				for ( var i : int = 0; i < rotatingObjects.Count; i ++ )
				{
					// if it is, then remove it from the list
					if ( rotatingObjects[ i ] == touchedObject )
					{
						rotatingObjects.RemoveAt( i );
						
						inList = true;
						
						textToShow = "You just stopped the cube!";
						CancelInvoke( "ClearTextToShow" );
						Invoke( "ClearTextToShow", 1.5 );
						
						break;
					}
				}
				
				// if not, add it to the list
				if ( !inList && touchedObject )
				{
					rotatingObjects.Add( touchedObject );
					
					textToShow = "That cube is now spinning!";
					CancelInvoke( "ClearTextToShow" );
					Invoke( "ClearTextToShow", 1.5 );
				}
			}
			else if ( touchedObject ) // list is empty, so add the object as it is not rotating
			{
				rotatingObjects.Add( touchedObject );
				
				textToShow = "That cube is now spinning!";
				CancelInvoke( "ClearTextToShow" );
				Invoke( "ClearTextToShow", 1.5 );
			}
		break;
		
		case MousePhase.Moved :
			// check if there is a gameObject stored in the variable
			if ( touchedObject )
			{
				// Get movement of the finger since last frame
				var touchDeltaPosition : Vector3 = currMousePos - lastMousePos;
				
				// Move object across XY plane
				//touchedObject.Translate( touchDeltaPosition.x * moveSpeed, touchDeltaPosition.y * moveSpeed, 0 );
				touchedObject.position += new Vector3( touchDeltaPosition.x * moveSpeed, touchDeltaPosition.y * moveSpeed, 0 );
			}
		break;
		
		case MousePhase.Ended :
			// remove the reference to the gameObject
			touchedObject = null;
		break;
		
		default :
			
		break;
	}
	
	
	// check if there are any items in the list
	// if so, rotate the objects
	if ( rotatingObjects.Count > 0 )
	{
		for ( var r : int = 0; r < rotatingObjects.Count; r ++ )
		{
			if ( rotatingObjects[ r ] )
			{
				rotatingObjects[ r ].Rotate( 0, 0, rotationSpeed * Time.deltaTime );
			}
		}
	}
}

========================================================================

Edited Answer 2 considering the OPs code and requirements :

OK, so I got a bit carried away in my last edit, thinking about what I thought it should be rather than what you wanted.

The answer is to store all your rotating objects in a List. Here is a great resource on using List and Array in Unity : http://wiki.unity3d.com/index.php?title=Which_Kind_Of_Array_Or_Collection_Should_I_Use?

• create a new scene
• create some cubes at random positions

attach this script to an empty gameObject or the camera :

#pragma strict

// to use List
import System.Collections.Generic;

public var rotationSpeed : float = 180.0;
public var moveSpeed : float = 0.05;

var touchedObject : Transform; // private var, left public for testing
var rotatingObjects : List.< Transform >; // private var, left public for testing


function Start() 
{
	rotatingObjects = new List.< Transform >();
}


function Update() 
{
	// to use mouse inputs in the editor
	// and device touch inputs in build
	#if UNITY_EDITOR
	UsingMouseInputs();
	#else
	UsingTouchInputs();
	#endif
}


// --


function UsingTouchInputs() 
{
	// has the screen got a touch?
	if ( Input.touchCount > 0 )
	{
		// what is the current state of the touch 0?
		switch( Input.GetTouch(0).phase )
		{
			case TouchPhase.Began :
				// get the touch position on the screen
				var touchPos : Vector3 = new Vector3( Input.GetTouch(0).position.x, Input.GetTouch(0).position.y, 0 );
				
				// create a Ray from the touch position
				var ray : Ray = Camera.main.ScreenPointToRay( touchPos );
				
				// create a RaycastHit variable to gather Raycast information
				var hit : RaycastHit;
				
				// cast a ray
				// ideally this would be done using a layermask
				if ( Physics.Raycast( ray, hit, 1000 ) )
				{
					// check the hit object by name
					// ideally this would be done by checking the tag
					if ( hit.collider.gameObject.name == "Cube" )
					{
						// if the object is a cube
						// store a reference to the object 
						touchedObject = hit.transform;
					}
				}
				
				// check if there are any items in the list
				if ( rotatingObjects.Count > 0 )
				{
					// check if the touchedObject is in the rotatingObjects list
					var inList : boolean = false;
					
					for ( var i : int = 0; i < rotatingObjects.Count; i ++ )
					{
						// if it is, then remove it from the list
						if ( rotatingObjects[ i ] == touchedObject )
						{
							rotatingObjects.RemoveAt( i );
							
							inList = true;
							
							break;
						}
					}
					
					// if not, add it to the list
					if ( !inList && touchedObject )
					{
						rotatingObjects.Add( touchedObject );
					}
				}
				else if ( touchedObject ) // list is empty, so add the object as it is not rotating
				{
					rotatingObjects.Add( touchedObject );
				}
			break;
			
			case TouchPhase.Moved :
				// check if there is a gameObject stored in the variable
				if ( touchedObject )
				{
					// Get movement of the finger since last frame
					var touchDeltaPosition : Vector2 = Input.GetTouch(0).deltaPosition;
					
					// Move object across XY plane
					//touchedObject.Translate( touchDeltaPosition.x * moveSpeed, touchDeltaPosition.y * moveSpeed, 0 );
					touchedObject.position += new Vector3( touchDeltaPosition.x * moveSpeed, touchDeltaPosition.y * moveSpeed, 0 );
				}
			break;
			
			case TouchPhase.Stationary :
				
			break;
			
			case TouchPhase.Ended :
				// remove the reference to the gameObject
				touchedObject = null;
			break;
			
			default : // TouchPhase.Cancelled
				// remove the reference to the gameObject
				touchedObject = null;
			break;
		}
	}
	
	
	// check if there are any items in the list
	// if so, rotate the objects
	if ( rotatingObjects.Count > 0 )
	{
		for ( var r : int = 0; r < rotatingObjects.Count; r ++ )
		{
			rotatingObjects[ r ].Rotate( 0, 0, rotationSpeed * Time.deltaTime );
		}
	}
}


// --


// enumerator to emulate touch phases
enum MousePhase
{
	Idle,
	Began,
	Stationary,
	Moved,
	Ended,
	Cancelled
}

var mouseTouchPhase : MousePhase;

var lastMousePos : Vector3;
var currMousePos : Vector3;


function UsingMouseInputs() 
{
	// using mouse as I have no provisioning profile for my touch device
	if ( Input.GetMouseButtonDown(0) )
	{
		mouseTouchPhase = MousePhase.Began;
	}
	else if ( Input.GetMouseButton(0) )
	{
		mouseTouchPhase = MousePhase.Moved;
	}
	else if ( Input.GetMouseButtonUp(0) )
	{
		mouseTouchPhase = MousePhase.Ended;
	}
	else
	{
		mouseTouchPhase = MousePhase.Idle;
	}
	
	
	// get the touch position on the screen
	var touchPos : Vector3 = Input.mousePosition;
	
	lastMousePos = currMousePos;
	currMousePos = touchPos;
	
	
	// what is the current state of the touch 0?
	switch( mouseTouchPhase )
	{
		case MousePhase.Began :
			// create a Ray from the touch position
			var ray : Ray = Camera.main.ScreenPointToRay( touchPos );
			
			// create a RaycastHit variable to gather Raycast information
			var hit : RaycastHit;
			
			// cast a ray
			// ideally this would be done using a layermask
			if ( Physics.Raycast( ray, hit, 1000 ) )
			{
				// check the hit object by name
				// ideally this would be done by checking the tag
				if ( hit.collider.gameObject.name == "Cube" )
				{
					// if the object is a cube
					// store a reference to the object 
					touchedObject = hit.transform;
				}
			}
			
			// check if there are any items in the list
			if ( rotatingObjects.Count > 0 )
			{
				// check if the touchedObject is in the rotatingObjects list
				var inList : boolean = false;
				
				for ( var i : int = 0; i < rotatingObjects.Count; i ++ )
				{
					// if it is, then remove it from the list
					if ( rotatingObjects[ i ] == touchedObject )
					{
						rotatingObjects.RemoveAt( i );
						
						inList = true;
						
						break;
					}
				}
				
				// if not, add it to the list
				if ( !inList && touchedObject )
				{
					rotatingObjects.Add( touchedObject );
				}
			}
			else if ( touchedObject ) // list is empty, so add the object as it is not rotating
			{
				rotatingObjects.Add( touchedObject );
			}
		break;
		
		case MousePhase.Moved :
			// check if there is a gameObject stored in the variable
			if ( touchedObject )
			{
				// Get movement of the finger since last frame
				var touchDeltaPosition : Vector3 = currMousePos - lastMousePos;
				
				// Move object across XY plane
				//touchedObject.Translate( touchDeltaPosition.x * moveSpeed, touchDeltaPosition.y * moveSpeed, 0 );
				touchedObject.position += new Vector3( touchDeltaPosition.x * moveSpeed, touchDeltaPosition.y * moveSpeed, 0 );
			}
		break;
		
		case MousePhase.Ended :
			// remove the reference to the gameObject
			touchedObject = null;
		break;
		
		default :
			
		break;
	}
	
	
	// check if there are any items in the list
	// if so, rotate the objects
	if ( rotatingObjects.Count > 0 )
	{
		for ( var r : int = 0; r < rotatingObjects.Count; r ++ )
		{
			if ( rotatingObjects[ r ] )
			{
				rotatingObjects[ r ].Rotate( 0, 0, rotationSpeed * Time.deltaTime );
			}
		}
	}
}

Hopefully I got it right this time. The end result here is the same as my original answer, but use a list instead of a boolean.

---

Edited Answer with an alternate method using rays :

I have made an example script of how you would move and rotate a selected object while dragging. Again, without knowing the specifics of what you are trying to achieve, I have made it for a camera with an Orthographic projection, and keeping the different objects at the same distance away from the camera.

I don’t have any way to test this on a touch device, so I have written it to work with a mouse while running in the editor. It compiles and is tested and working, so it should (hopefully) work when built out to a device.

Again, I have left a lot of comments throughout the process, hopefully this will give you a starting point to writing your own code specific to your needs.

This script will move and rotate cubes while being touched and dragged around the screen.

• Create a new scene
• set the camera projection to Orthographic
• set the camera size to 7
• create several cubes and randomly place them in the scene, leaving the position z at 0

attach this script to an empty gameObject or the camera :

#pragma strict

public var rotationSpeed : float = 180.0;
public var distanceFromCamera : float = 9.7;

var touchedObject : Transform; // private var, left public for testing


function Update() 
{
	// to use mouse inputs in the editor
	// and device touch inputs in build
	#if UNITY_EDITOR
	UsingMouseInputs();
	#else
	UsingTouchInputs();
	#endif
}


// --


function UsingTouchInputs() 
{
	// has the screen got a touch?
	if ( Input.touchCount > 0 )
	{
		// get the touch position on the screen
		var touchPos : Vector3 = new Vector3( Input.GetTouch(0).position.x, Input.GetTouch(0).position.y, 0 );
		
		// create a Ray from the touch position
		var ray : Ray = Camera.main.ScreenPointToRay( touchPos );
		
		
		// what is the current state of the touch 0?
		switch( Input.GetTouch(0).phase )
		{
			case TouchPhase.Began :
				// create a RaycastHit variable to gather Raycast information
				var hit : RaycastHit;
				
				// cast a ray
				// ideally this would be done using a layermask
				if ( Physics.Raycast( ray, hit, 1000 ) )
				{
					// check the hit object by name
					// ideally this would be done by checking the tag
					if ( hit.collider.gameObject.name == "Cube" )
					{
						// if the object is a cube
						// store a reference to the object 
						touchedObject = hit.transform;
					}
				}
			break;
			
			case TouchPhase.Moved :
				// check if there is a gameObject stored in the variable
				if ( touchedObject )
				{
					// move the object to underneath the touch position
					touchedObject.position = ray.origin + ( ray.direction * distanceFromCamera );
					
					// rotate the object
					touchedObject.Rotate( 0, 0, rotationSpeed * Time.deltaTime );
				}
			break;
			
			case TouchPhase.Stationary :
				// check if there is a gameObject stored in the variable
				if ( touchedObject )
				{
					// rotate the object
					touchedObject.Rotate( 0, 0, rotationSpeed * Time.deltaTime );
				}
			break;
			
			case TouchPhase.Ended :
				// remove the reference to the gameObject
				touchedObject = null;
			break;
			
			default : // TouchPhase.Cancelled
				// remove the reference to the gameObject
				touchedObject = null;
			break;
		}
	}
}


// --


// enumerator to emulate touch phases
enum MousePhase
{
	Idle,
	Began,
	Stationary,
	Moved,
	Ended,
	Cancelled
}

var mouseTouchPhase : MousePhase;


function UsingMouseInputs() 
{
	// using mouse as I have no provisioning profile for my touch device
	if ( Input.GetMouseButtonDown(0) )
	{
		mouseTouchPhase = MousePhase.Began;
	}
	else if ( Input.GetMouseButton(0) )
	{
		mouseTouchPhase = MousePhase.Moved;
	}
	else if ( Input.GetMouseButtonUp(0) )
	{
		mouseTouchPhase = MousePhase.Ended;
	}
	else
	{
		mouseTouchPhase = MousePhase.Idle;
		
		return;
	}
	
	
	// get the touch position on the screen
	var touchPos : Vector3 = Input.mousePosition;
	
	// create a Ray from the touch position
	var ray : Ray = Camera.main.ScreenPointToRay( touchPos );
	
	
	// what is the current state of the touch 0?
	switch( mouseTouchPhase )
	{
		case MousePhase.Began :
			// create a RaycastHit variable to gather Raycast information
			var hit : RaycastHit;
			
			// cast a ray
			// ideally this would be done using a layermask
			if ( Physics.Raycast( ray, hit, 1000 ) )
			{
				// check the hit object by name
				// ideally this would be done by checking the tag
				if ( hit.collider.gameObject.name == "Cube" )
				{
					// if the object is a cube
					// store a reference to the object 
					touchedObject = hit.transform;
				}
			}
		break;
		
		case MousePhase.Moved :
			// check if there is a gameObject stored in the variable
			if ( touchedObject )
			{
				// move the object to underneath the touch position
				touchedObject.position = ray.origin + ( ray.direction * distanceFromCamera );
				
				// rotate the object
				touchedObject.Rotate( 0, 0, rotationSpeed * Time.deltaTime );
			}
		break;
		
		case MousePhase.Ended :
			// remove the reference to the gameObject
			touchedObject = null;
		break;
		
		default :
			
		break;
	}
}

Hope this helps, Happy Coding =]

---

Original answer using the OPs code :

First, remember to separate your switch cases with a break;

Hopefully the comments in this example script will explain the steps.

Store the rotation state in a global boolean variable, then change the state of this boolean for each touch down.

If you only want the object to be moved while rotating, use an if-else conditional to check if isRotating before getting the delta and moving the object.

// move speed
var speed : float = 2.0;

// rotation speed
var rotspeed : float = 5.0;

// we want to know if the object is already rotating or not
var isRotating : boolean = false;

function Update()
{
	// has the screen got a touch?
	if ( Input.touchCount > 0 )
	{
		// what is the current state of the touch 0?
		switch ( Input.GetTouch(0).phase )
		{
			// touch down
			case TouchPhase.Began :
				/*
				// are we rotating?
				if ( isRotating ) // yes
				{
					// stop rotating
					isRotating = false;
				}
				else // no
				{
					// start rotating
					isRotating = true;
				}
				*/
				// all the above if-else can be done with one line
				isRotating = !isRotating; // the boolean is now equal to the opposite of the current boolean state
			break; // don't forget the break after each case
			
			// touch moved
			case TouchPhase.Moved :
				// If you only want the object to be moved while rotating, use an if-else conditional
				// if ( isRotating )
				// {
					// Get movement of the finger since last frame
					var touchDeltaPosition:Vector2 = Input.GetTouch(0).deltaPosition;

					// Move object across XY plane
					transform.Translate (touchDeltaPosition.x * speed,
						touchDeltaPosition.y * speed, 0);
				//}
			break;
		}
	}
	
	// if we are rotating, rotate the object!
	if ( isRotating )
	{
		transform.Rotate(0,0,rotspeed*Time.deltaTime);
	}
}

[pritxm]

Hey @AlucardJay ! Can you please help me on this?
I can make this rotate around with keyboard but I cant make it work with touch controls.
I want to make the player move along the radius to the left when i touch the left side of the screen.