Moving FPS/TPS camera to look at a target and resuming player control

Question

I am having trouble with aligning my player controlled camera (I use the same class for FPS and TPS) to look at a target (when ResetCamera() is called by another script) and then getting the player to resume control. The main reason I am doing this is so I can switch between FPS and TPS cameras and remain looking at the same target.

I can look at the target fine, but ONLY if I stop setting the rotation based on yaw and pitch (from "Mouse X" and "Mouse Y" inputs) in LateUpdate() after I set the lookAtTarget in ResetCamera(), but that means the player can no longer look around. However, I cannot figure out how to get the correct yaw and pitch values after this so the player can continue looking around from the new look at target. How could I do this so the player could continue looking around?

 public class PlayerCamera : MonoBehaviour {
 
     public float mouseSensitivity = 10f;
     public Transform target;
     public float dstFromTarget = 2f;
     public Vector2 pitchConstraints = new Vector2(-20f, 85f);
 
     public float rotSmoothTime = .12f;
     Vector3 rotSmoothVel;
     Vector3 currRot;
 
     float yaw;
     float pitch;
     
     void LateUpdate() {
         yaw += Input.GetAxis("Mouse X") * mouseSensitivity;
         pitch -= Input.GetAxis("Mouse Y") * mouseSensitivity;
         pitch = Mathf.Clamp(pitch, pitchConstraints.x, pitchConstraints.y);
 
         currRot = Vector3.SmoothDamp(currRot, new Vector3(pitch, yaw), ref rotSmoothVel, rotSmoothTime);
         transform.eulerAngles = currRot;
 
         transform.position = target.position - transform.forward * dstFromTarget;
     }
 
     public void ResetCamera(Transform lookAtTarget) {
         transform.LookAt(lookAtTarget);
 
         // below gets yaw and pitch values that move the camera to look at the
         // wrong location
         // yaw = transform.eulerAngles.x;
         // pitch = transform.eulerAngles.y;
         // pitch = Mathf.Clamp(pitch, pitchConstraints.x, pitchConstraints.y);
         // currRot = new Vector3(pitch, yaw);
     }
 }

Answer 1

So, I figured out how to do what I wanted. Below is a script for a third or first person (just adjust the dstFromTarget variable to zero) camera that can be rotated to look at a target by another script with ResetCamera() and the player can resume moving around from that point.

 public class PlayerCamera : MonoBehaviour {

 public bool isFirstPerson = false;
 public float mouseSensitivity = 10f;
 public Transform target;
 public float dstFromTarget = 2f;
 public bool invertedPitch = false;
 public float smoothTime = .12f;

 public float minimumX = -85f;
 public float maximumX = 85f;

 // LateUpdate, so the Camera Target will definitely have been set
 void LateUpdate () {
     // first person updating is handled by Inverse kinematics stuff in my case
     if (isFirstPerson) return;
     UpdateStuff();
 }
 
 public void UpdateStuff() {
     float yaw = Input.GetAxisRaw("Mouse X");
     float pitch = -Input.GetAxisRaw("Mouse Y");
     if (invertedPitch) {
         pitch *= -1f;
     }

     Vector3 yRot = new Vector3(0f, yaw, 0f) * mouseSensitivity;
     Vector3 xRot = new Vector3(pitch, 0f, 0f) * mouseSensitivity;

     xRot = ClampRotationAroundXAxis(transform.rotation, xRot);

     Transform newTrans = transform;
     newTrans.Rotate(xRot);
     newTrans.Rotate(yRot, Space.World);

     transform.rotation = Quaternion.Slerp(transform.rotation, newTrans.rotation, smoothTime * Time.deltaTime);

     transform.position = target.position - transform.forward * dstFromTarget;
 }

 public void ResetCamera(Transform lookAtTarget) {
     transform.LookAt(lookAtTarget);
 }
 
 Vector3 ClampRotationAroundXAxis(Quaternion q, Vector3 xrot) {
     q.x /= q.w;
     q.y /= q.w;
     q.z /= q.w;
     q.w = 1.0f;

     float angleX = 2.0f * Mathf.Rad2Deg * Mathf.Atan (q.x);

     if (angleX < minimumX && xrot.x < 0f) {
         xrot = Vector3.zero;
     }
     if (angleX > maximumX && xrot.x > 0f) {
         xrot = Vector3.zero;
     }

     return xrot;
 }

}

Moving FPS/TPS camera to look at a target and resuming player control

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