Drag to Rotate Game Object with Mouse

Questions & Answers
1

Hi all,

This code works nice in my work but i just want a spin circular rotation with mouse drag like this picture. Anyone can help me ? Thanks.

91544-circlerotate.jpg

using UnityEngine;
 using System.Collections;
 
 [RequireComponent(typeof(MeshRenderer))]
 
 public class rotateController : MonoBehaviour
 {
 
     #region ROTATE
     private float _sensitivity = 0.5f;
     private Vector3 _mouseReference;
     private Vector3 _mouseOffset;
     private Vector3 _rotation = Vector3.zero;
     private bool _isRotating;
 
 
     #endregion
 
     void Update()
     {
         if (_isRotating)
         {
             // offset
             _mouseOffset = (Input.mousePosition - _mouseReference);
             // apply rotation
             //_rotation.y = -(_mouseOffset.x + _mouseOffset.y) * _sensitivity;
  
             _rotation.z = -(_mouseOffset.x + _mouseOffset.y) * _sensitivity; // rotate
             gameObject.transform.Rotate(_rotation); // store new mouse position
             _mouseReference = Input.mousePosition;
             // rotate
             //transform.Rotate(_rotation);
             transform.eulerAngles += _rotation;
             // store mouse
         }
     }
 
     void OnMouseDown()
     {
         // rotating flag
         _isRotating = true;
 
         // store mouse position
         _mouseReference = Input.mousePosition;
     }
 
     void OnMouseUp()
     {
         // rotating flag
         _isRotating = false;
     }
 
 }
2

give a tag name to sphere then the ray cast will be recognize that one only ,it will rotate in only right and left direction ,if u want to move x,y,z means give
transform.Rotate (0,(Input .GetAxis(“Mouse X”)*speed *-Time .deltaTime),0,Space .World);
in place of zeros give (Input .GetAxis(“Mouse Y”)*speed *Time .deltaTime),(Input .GetAxis(“Mouse Z”)*speed *Time .deltaTime)

using System.Collections;
using System.Collections.Generic;
using UnityEngine;

public class newrotation : MonoBehaviour {
public float speed = 5.0f;
Ray r;
RaycastHit rh;
// Use this for initialization
void Start () {

}

// Update is called once per frame
void Update () {
	r = Camera.main.ScreenPointToRay (Input .mousePosition);
	if(Physics .Raycast (r,out rh,1000))
		{
		if(rh.collider .gameObject .tag=="rot")
		{
			if(Input .GetMouseButton (0) )
			{
	 transform.Rotate (0,(Input .GetAxis("Mouse X")*speed *-Time .deltaTime),0,Space .World);
			}
		}
		}
}

}