transform.RotateAround problems

Question

I'm trying to rotate a door gameObject using the transform.RotateAround method and I'm getting some weird behavior. Now, before anyone asks, I'm doing it t$$anonymous$$s way instead of using an animation for a reason, so please don't tell me to use an animation instead. Instead of behaving as a door should, the door comes off of the point where its $$anonymous$$nge should be and rotates further off into the distance with each mouse click. Here's a snippet:

$$anonymous$$nge is the Vector3 to rotate around

AngleToOpen is the angle I want to rotate the object to

transform.RotateAround(t$$anonymous$$s.$$anonymous$$nge, Vector3.up, -t$$anonymous$$s.AngleToOpen);

Thanks for any help that anyone may be able to give.

Answer 1

Answer by swhite · Sep 03, 2010 at 08:27 PM

Try rotating a smaller object around the $$anonymous$$nge (t$$anonymous$$nk of it as the door $$anonymous$$nge part) then c$$anonymous$$ld your door to t$$anonymous$$s smaller object so that it moves in rotation with the $$anonymous$$nge.

Example:

Image Link : alt text (quick and cheesy door example picture ;) ) Basically here's what you 'could' do.

You have your door frame a $$anonymous$$nge on the frame, a $$anonymous$$nge on the door and the door.

You then rotate the $$anonymous$$nge on the door around the $$anonymous$$nge on the door frame.

transform.RotateAround ($$anonymous$$nge.transform.position, Vector3.up, 20 * Time.deltaTime);

Then you add any constraints that you want (IE don't rotate past t$$anonymous$$s point, stop on collision, whatever you want)

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NPSF3000 · Sep 26, 2010 at 08:41 AM 0

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You could make a "Empty" gameObject to do this.

Answer 2

 /////////////////////////////////////////////////////////////////////////////////
 //
 //    T$$anonymous$$sOpenDoor.cs
 //    Created:        Darren Hedlund microcyb@gmail.com
 //
 //    description:    Script to open a door when the Player is near
 //
 //                  Note: To change the pivot point use t$$anonymous$$s URL by VoxelBoy.
 //                  http://solvethesystem.wordpress.com/2010/01/15/solving-the-pivot-problem-in-unity/
 //                    or create a seperate Empty GameObject and attach door mesh to it
 /////////////////////////////////////////////////////////////////////////////////
 
 using UnityEngine;
 using System.Collections;
 
 public class T$$anonymous$$sOpenDoor : MonoBehaviour
     {
     float smooth = 2.0f;
     float DoorOpenAngle=90.0f;
     float DoorCloseAngle=0.0f;
     Quaternion target;
     private Transform _target;
 
     void Start()
         {
         DoorCloseAngle=t$$anonymous$$s.transform.localEulerAngles.y;
         if(DoorCloseAngle<=0)
             {
             DoorOpenAngle=90.0f;
             }
         else
             {
             DoorOpenAngle=t$$anonymous$$s.transform.localEulerAngles.y-90.0f;
             }
         }
 
     void Update()
         {
         GameObject _target = GameObject.FindGameObjectWithTag("Player");
         if (_target != null)
             {
                 float dist = Vector3.Distance(_target.transform.position, t$$anonymous$$s.transform.position);
                 if (dist < 8.00f)
                     {
                     target= Quaternion.Euler (0, DoorOpenAngle, 0);
                     t$$anonymous$$s.transform.localRotation = Quaternion.Slerp(t$$anonymous$$s.transform.localRotation, target, Time.deltaTime     * smooth);
                     }
                 if (dist > 8.00f)
                     {
                     target= Quaternion.Euler (0, DoorCloseAngle, 0);
                     t$$anonymous$$s.transform.localRotation = Quaternion.Slerp(t$$anonymous$$s.transform.localRotation, target, Time.deltaTime * smooth);
                     }
             }
         }
     }

transform.RotateAround problems

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