(Help) How To Rotate Object Based Off The Orientation Of The Main Camera

Here's My Code:

Code (CSharp):

1. using System.Collections;
2. using System.Collections.Generic;
3. using UnityEngine;
4.  
5. public class Pickup : MonoBehaviour
6. {
7.     float throwForce = 600;
8.     Vector3 objectPos;
9.     float distance;
10.     public float maxDistance = 3;
11.  
12.     public bool canHold = true;
13.     public GameObject item;
14.     public GameObject tempParent;
15.     public bool isHolding = false;
16.  
17.     // Update is called once per frame
18.     void Update()
19.      
20.     {
21.      
22.  
23.         distance = Vector3.Distance(item.transform.position, tempParent.transform.position);
24.      
25.         if (distance >= maxDistance)
26.         {
27.             isHolding = false;
28.         }
29.         if (isHolding == true)
30.         {
31.             item.GetComponent<Rigidbody>().velocity = Vector3.zero;
32.             item.GetComponent<Rigidbody>().angularVelocity = Vector3.zero;
33.             item.transform.SetParent(tempParent.transform);
34.  
35.             if (Input.GetMouseButtonDown(1))
36.             {
37.                 item.GetComponent<Rigidbody>().AddForce(tempParent.transform.forward * throwForce);
38.                 isHolding = false;
39.             }
40.             if (Input.GetAxis("Mouse ScrollWheel") > 0)
41.             {
42.                 transform.Rotate(Vector3.left * 3f, Space.Self);
43.             }
44.             if (Input.GetAxis("Mouse ScrollWheel") < 0)
45.             {
46.                 transform.Rotate(Vector3.right * 3f, Space.Self);
47.             }
48.         }
49.         else
50.         {
51.             objectPos = item.transform.position;
52.             item.transform.SetParent(null);
53.             item.GetComponent<Rigidbody>().useGravity = true;
54.             item.transform.position = objectPos;
55.         }
56.      
57.     }
58.     void OnMouseOver()
59.     {
60.         if (distance <= maxDistance && Input.GetMouseButtonDown(0))
61.         {
62.  
63.  
64.         isHolding = true;
65.         item.GetComponent<Rigidbody>().useGravity = false;
66.         item.GetComponent<Rigidbody>().detectCollisions = true;
67.  
68.         }
69.     }
70.     void OnMouseUp()
71.     {
72.         isHolding = false;
73.    
74.     }
75. }

As the title says, I want the gameobject "item" to rotate from the main camera's orientation instead of it's own. (excuse my incompetence if the answer is really simple, this is my 1st week learning how to program in general).

 

You could try saving the rotation the camera did in the frame and apply that rotation to your item? This will rotate your item by the same rotation the camera experiences. Is this what u wanted?

 

This is an object that I want to pick up and rotate. My problem is that I want it to rotate based on the orientation of the player camera (main camera) so that no matter what side I rotate it from, it rotates in the same direction

 

take a directional vector from the camera, its forward or up vector for example, and rotate around that axis.

 

Could you write me the script that would apply to my circumstance here? As I said in my post, this is my first week programming, I don't know how to do that, if it's not too much to ask for of course.

 

addforce(maincam.transform.forward);

 

This made the object fly out of my hands, I want it to rotate in the same orientation no matter which side im looking at.

 

You probably want something along the lines of

Code (CSharp):

1. transform.RotateAround(transform.position, Camera.main.forward, 3f);

Although there is a chance that

Camera.main.forward

is not what you actually want, but perhaps

Camera.main.up

or even just a world vector like

Vector3.up

.

 

I guess I'm a bit confused becuase if you were rotating the camera to rotate the object, but the object wasnt moving, eventually the object would go off the screen (if you rotate the camera far enough). Is that what u want?

Or were you trying to make the pickup stay infront of the players camera as they rotate the camera around? Because that's more common behaviour.

Code (CSharp):

1. Quaternion RotationDelta;
2. Transform cameraTransform;
3. Quaternion previousCameraRotation;
4. Transform pickupTransform;
5.  
6. void Start()
7. {
8.     previousCameraRotation = cameraTransform.rotation;
9. }
10.  
11. void Update()
12. {
13.      // Get the amount the camera rotated from the last frame
14.      RotationDelta = cameraTransform.rotation - previousCameraRotation
15.      
16.      // Save the rotation this frame to compare with next frame
17.      previousCameraRotation = cameraTransform.rotation
18.  
19.      // Apply the rotation to your pickup
20.      pickupTransform.rotation *= RotationDelta;
21.  
22. }

This should rotate the object the same amount that the camera rotates... though you probably only want it to rotate on the y axis..

 

A lot of confusion in this thread. Would you mind providing some pictures to illustrate the behavior you're actually looking for?

 

Like This:

 

Seems like you want to rotate the object in the transforms directions. So instead of Vector3.up, .down. right, try the rotating on the up, down and right of the objects transform that you are rotating.

 

And how would that look like in the context of my code? (Again I've been learning for 9 days now)

 

pls tell us by making mockup what you want to do??