Rotating with middle mouse button issue

Unity Engine
1

Hey guys - when I use the middle mouse button the rotation gets kind of wonky after holding the button down a little too long. Is there a better way to implement the rotate around?

I want to replicate this: Screen capture - cde0185473b7a086391a8b6945fba122 - Gyazo

but this is how it currently works: Screen capture - 81fdf3b1cf94b5c0de6a492d864d6ae0 - Gyazo

   void Update()
    {
        //currentPos = transform.position + offset;
        if (Input.GetMouseButtonDown(2))
        {
            mouseOrigin = Input.mousePosition;
            isRotating = true;
        }
   
        if (!Input.GetMouseButton(2)) isRotating = false;

        if (isRotating)
        {
            Vector3 pos = Camera.main.ScreenToViewportPoint(Input.mousePosition - mouseOrigin);
            transform.RotateAround(PlayerObj.transform.position, Vector3.right, -pos.y * turnSpeed); //changed from PlayerObj.transform.right
            transform.RotateAround(PlayerObj.transform.position, Vector3.up, pos.x * turnSpeed);
        }
}

==========================================================
for anyone else who wants to reference this, here is a prefect implementation for what I wanted to achieve:

using UnityEngine;

public class CameraOrbit : MonoBehaviour
{

    public Transform camTransform;
    public Transform pivotTransform;

    protected Vector3 localRot;
    protected float cameraDist = 10f;

    public float MouseSensitivity = 40f;
    public float ScrollSensitvity = 2f;
    public float orbitSensitivity = 10f;
    public float scrollSensitivity = 6f;
    public bool pressed = false;

    void LateUpdate()
    {

        if(Input.GetMouseButtonDown(2))
        {
            pressed = true;
        }
        if (Input.GetMouseButtonUp(2))
        {
            pressed = false;
        }

        if (((Input.GetAxis("Mouse X") != 0) || (Input.GetAxis("Mouse Y") != 0)) && (pressed))
        {
            localRot.x += Input.GetAxis("Mouse X") * MouseSensitivity;
            localRot.y -= Input.GetAxis("Mouse Y") * MouseSensitivity;

            //Clamp the y Rotation to horizon and not flipping over at the top
            if (localRot.y < 0f)
                localRot.y = 0f;
            else if (localRot.y > 90f)
                localRot.y = 90f;
        }
     
        if (Input.GetAxis("Mouse ScrollWheel") != 0f)
        {
            float ScrollAmount = Input.GetAxis("Mouse ScrollWheel") * ScrollSensitvity;

            ScrollAmount *= (cameraDist * .3f);

            cameraDist += ScrollAmount * -1f;

            cameraDist = Mathf.Clamp(cameraDist, 1.5f, 100f);
        }

        //Actual Camera Rig Transformations
        Quaternion QT = Quaternion.Euler(localRot.y, localRot.x, 0);
        pivotTransform.rotation = Quaternion.Lerp(pivotTransform.rotation, QT, Time.deltaTime * orbitSensitivity);

        if (camTransform.localPosition.z != cameraDist * -1f)
        {
            camTransform.localPosition = new Vector3(0f, 0f, Mathf.Lerp(camTransform.localPosition.z, cameraDist * -1f, Time.deltaTime * scrollSensitivity));
        }
    }
}
2

Please be more specific. “wonky” doesn’t tell us much.

3

Well I want to replicate this: https://gyazo.com/cde0185473b7a086391a8b6945fba122

but this is how it currently works: https://gyazo.com/81fdf3b1cf94b5c0de6a492d864d6ae0

4

You’ve got a gimbaling problem.

The basic solution here is very similar to the solution I posted for this question. Basically: track in a variable the total amount the mouse has moved, and then start the rotation each frame from scratch, using that variable.

5

Got a beautiful implementation working now!

using UnityEngine;

public class CameraOrbit : MonoBehaviour
{

    public Transform camTransform;
    public Transform pivotTransform;

    protected Vector3 localRot;
    protected float cameraDist = 10f;

    public float MouseSensitivity = 40f;
    public float ScrollSensitvity = 2f;
    public float orbitSensitivity = 10f;
    public float scrollSensitivity = 6f;
    public bool pressed = false;

    void LateUpdate()
    {

        if(Input.GetMouseButtonDown(2))
        {
            pressed = true;
        }
        if (Input.GetMouseButtonUp(2))
        {
            pressed = false;
        }

        if (((Input.GetAxis("Mouse X") != 0) || (Input.GetAxis("Mouse Y") != 0)) && (pressed))
        {
            localRot.x += Input.GetAxis("Mouse X") * MouseSensitivity;
            localRot.y -= Input.GetAxis("Mouse Y") * MouseSensitivity;

            //Clamp the y Rotation to horizon and not flipping over at the top
            if (localRot.y < 0f)
                localRot.y = 0f;
            else if (localRot.y > 90f)
                localRot.y = 90f;
        }
       
        if (Input.GetAxis("Mouse ScrollWheel") != 0f)
        {
            float ScrollAmount = Input.GetAxis("Mouse ScrollWheel") * ScrollSensitvity;

            ScrollAmount *= (cameraDist * .3f);

            cameraDist += ScrollAmount * -1f;

            cameraDist = Mathf.Clamp(cameraDist, 1.5f, 100f);
        }

        //Actual Camera Rig Transformations
        Quaternion QT = Quaternion.Euler(localRot.y, localRot.x, 0);
        pivotTransform.rotation = Quaternion.Lerp(pivotTransform.rotation, QT, Time.deltaTime * orbitSensitivity);

        if (camTransform.localPosition.z != cameraDist * -1f)
        {
            camTransform.localPosition = new Vector3(0f, 0f, Mathf.Lerp(camTransform.localPosition.z, cameraDist * -1f, Time.deltaTime * scrollSensitivity));
        }
    }
}