How to drag a GameObject without centering it on Mouse Cursor position?

Questions & Answers
1

I´m trying to make a E-reader for comics in Unity C#, but i´m having a lot of trouble creating the scroll feature for the pages. The problem is that the Page snaps to the mouse when you try to drag it, meaning that it centers on the mouse position making it less than smooth.

This is the code that activates when you start to drag, before that it checks whether it´s a swipe or a button press. I´ve been to the edges of the internet to find a solution, and i´ve tried a lot of things like adding the position of the initial mouseclickpoint. But i´m at a loss with this one.

void SwipeIndexMenu ()
	{
		RaycastHit hit;														//The RayCasting when you start to drag pages. 
		Ray ry = Camera.mainCamera.ScreenPointToRay (Input.mousePosition);
		if (Physics.Raycast (ry, out hit, 1000)) {
			
			Debug.DrawRay (ry.origin, ry.direction * 1000, Color.grey, 10);
			if (hit.collider.gameObject.tag == "IndexMenu") {				//To prevent the menu from dissapearing if you swipe the wrong place.
			} else {
				if (hit.collider.gameObject.tag == "ScrollMenuIndex") 
					{
					
					var newmousePos = Input.mousePosition;
					Vector3 currentposition = newmousePos + MouseOffsetposition;
					GameObject PageTransformerIndexMenu = GameObject.FindGameObjectWithTag ("ScrollMenuIndex");
					
					hit.transform.position = new Vector3 (
							PageTransformerIndexMenu.transform.position.x,
							Camera.main.ScreenToWorldPoint (currentposition).y,
							PageTransformerIndexMenu.transform.position.z);
2

Ok my buddy was kind enough to email it to me. Keep in mind this was designed for a horizontal slider for volume control on an android. There is code to handle mouse down and finger touch. You should be able to figure out what you need from it. Enjoy!

using UnityEngine;
using System.Collections;

public class SliderScript : MonoBehaviour 
{
	
	public float min_X;
	public float max_X;
	public string prefsString;
	private float m_Volume = 0.0f;
		
	float originalWidth = 1280.0f;  // define here the original resolution
	float originalHeight = 800.0f; // you used to create the GUI contents 
	Vector3 scale;
	private bool handleFingerInput = false;
	void Awake () 
	{
		m_Volume = PlayerPrefs.GetFloat(prefsString);
		float xpos = min_X + ((max_X - min_X) * m_Volume);
		gameObject.transform.position = new Vector3(xpos, gameObject.transform.position.y, gameObject.transform.position.z);
	}
	// Use this for initialization
	void Start () 
	{
		scale.x = Screen.width/originalWidth; // calculate hor scale
    	scale.y = Screen.height/originalHeight; // calculate vert scale
    	scale.z = 1;	
		
	}
	
	// Update is called once per frame
	void Update () 
	{
		if(gameObject.transform.position.x <= min_X)
			{
				gameObject.transform.position = new Vector3(min_X, gameObject.transform.position.y, gameObject.transform.position.z);
			}
			else if(gameObject.transform.position.x >= max_X)
			{
				gameObject.transform.position = new Vector3(max_X, gameObject.transform.position.y, gameObject.transform.position.z);
			}
		
		if(Input.touchCount > 0)
	    {
			for(int i = 0; i < Input.touchCount; i++)
			{
				Vector2 inputPosition = Input.touches*.position;*

_ if (Input.touches*.phase == TouchPhase.Began )_
_ {*_

* if(guiTexture.HitTest(inputPosition) == true)*
* {*
* handleFingerInput = true;*
* }*
* }*
else if((Input.touches_.phase == TouchPhase.Moved || Input.touches*.phase == TouchPhase.Stationary) && (handleFingerInput == true))
{
float xpos = gameObject.transform.position.x;
xpos = inputPosition.x / Screen.width;_
if(xpos <= min_X)
_ {_
xpos = min_X;
_ }_
else if(xpos >= max_X)
_ {_
xpos = max_X;
_ }*_

* gameObject.transform.position = new Vector3(xpos, gameObject.transform.position.y, gameObject.transform.position.z);*

* m_Volume = (xpos - min_X) / (max_X - min_X);*

* if(PlayerPrefs.GetFloat(prefsString) != m_Volume)
_ {_
PlayerPrefs.SetFloat(prefsString, m_Volume);
_ PlayerPrefs.Save();
}
}
else*
* {
handleFingerInput = false;
}*_

* }*
* }*

* }*

* void OnMouseDown()*
* {*
* StartCoroutine(“HandleMouseDown”);*
* }*

* IEnumerator HandleMouseDown()*
* {*
* while(Input.GetMouseButtonUp(0) == false)*
* {*
* Vector3 inputPosition = Input.mousePosition;*
* float xpos = gameObject.transform.position.x;*
* xpos = inputPosition.x / Screen.width;*
* if(xpos <= min_X)
_ {_
xpos = min_X;
_ }_
else if(xpos >= max_X)
_ {_
xpos = max_X;
_ }*_

* gameObject.transform.position = new Vector3(xpos, gameObject.transform.position.y, gameObject.transform.position.z);*
* m_Volume = (xpos - min_X) / (max_X - min_X);*

* if(PlayerPrefs.GetFloat(prefsString) != m_Volume)
_ {_
PlayerPrefs.SetFloat(prefsString, m_Volume);
_ PlayerPrefs.Save();
}*_

* yield return null;*
* }*
* }*
}