Smooth rotation when dragging on mobile(android)

Questions & Answers
1

Alright so this script basically rotates an object when dragging across the screen with one finger. I would like to make it more “smooth” thou. Ive been trying alot of diffrent things like lerp and slerp and so on but nothing seems to work, so I thought I might as well post the working code here before I give up. I would greatly appricate if anyone knew to to make the rotation more smooth.

#pragma strict

private var oldMousePos : float;
private var curMousePos : float;
var old : float;
var touch1 : float;
var dual : boolean;

function Update () 
{    
	if (Input.touchCount == 1)
	{
		touch1 =Input.GetTouch(0).position.x;
	
		if (Input.GetTouch(0).phase == TouchPhase.Began  )
		{
			oldMousePos = (touch1/Screen.width);
			old = 0;
		}
		if(Input.GetTouch(0).phase == TouchPhase.Moved )// This keeps running while finger is held down
		{
			curMousePos =  (touch1/Screen.width) - oldMousePos;
			
			if(!dual){
			transform.Rotate(0,((curMousePos-old)*20000)*Time.deltaTime ,0);
			}
			
			else{dual = false;}
			old = curMousePos;
		}
	}
	if(Input.touchCount == 2 )
	{
		dual = true;
	}
}

Also posted here: http://forum.unity3d.com/threads/136415-Smooth-rotation-when-dragging?p=926264#post926264

2

Have you tried sth like

float smooth = some_number; // bigger the number the faster it will rotate
Quaternion newRot = transform.Rotate(0,curMousePos-old,0);
transform.rotation = Quaternion.Lerp(transform.rotation,newRot,Time.deltaTime * smooth);

Not tested but it should work. this is c# though but It’s easy to read

3

@jeff25, just simply drag this script into your gameobject. Make sure your gameobject tag is Draggable or you could change that.

using UnityEngine;
using System.Collections;

public class Drag : MonoBehaviour 
{
	// Touch distance to the object.
	private float dist;
	// Checking condition for touching the object.
	private bool dragging = false;
	// Distance of the object and the touch.
	private Vector3 offset;
	// Drag the object.
	private Transform toDrag;
	
	void Update() 
	{
		Vector3 v3;
		
		if (Input.touchCount != 1) 
		{
			dragging = false; 
			return;
		}
		
		Touch touch = Input.touches[0];
		Vector3 pos = touch.position;

		// Started the touch.
		if(touch.phase == TouchPhase.Began) 
		{
			// Finger starts the touch.
			RaycastHit hit;
			Ray ray = Camera.main.ScreenPointToRay(pos); 
			// Finger on object.
			if(Physics.Raycast(ray, out hit) && (hit.collider.tag == "Draggable"))
			{
				Debug.Log ("Here");
				// Object to finger.
				toDrag = hit.transform;
				dist = hit.transform.position.z - Camera.main.transform.position.z;
				v3 = new Vector3(pos.x, pos.y, dist);
				v3 = Camera.main.ScreenToWorldPoint(v3);
				offset = toDrag.position - v3;
				dragging = true;
			}
		}
		// Check finger drag the object to the display.
		if (dragging && touch.phase == TouchPhase.Moved) 
		{
			v3 = new Vector3(Input.mousePosition.x, Input.mousePosition.y, dist);
			v3 = Camera.main.ScreenToWorldPoint(v3);
			// Drag object at particular distance.
			toDrag.position = v3 + offset;
		}
		// Finger release the Object/Screen.
		if (dragging && (touch.phase == TouchPhase.Ended || touch.phase == TouchPhase.Canceled)) 
		{
			dragging = false;
		}
	}
}