SmoothCameraScript.cs

using UnityEngine;

/// <summary>
/// Smooth camera script class
/// </summary>
public class SmoothCameraScript : MonoBehaviour
{
    /// <summary>
    /// Spherical interpolation time multiplier
    /// </summary>
    [SerializeField]
    private float slerpTimeMultiplier = 4.0f;

    /// <summary>
    /// Third person offset
    /// </summary>
    [SerializeField]
    private Vector3 thirdPersonOffset = new Vector3(0.0f, 5.0f, -5.0f);

    /// <summary>
    /// First person offset
    /// </summary>
    [SerializeField]
    private Vector3 firstPersonOffset = new Vector3(0.0f, 0.0f, 0.0f);

    /// <summary>
    /// Camera state
    /// </summary>
    [SerializeField]
    private ECameraState cameraState = ECameraState.ThirdPerson;

    /// <summary>
    /// Follow anti gravity vehicle
    /// </summary>
    private AGVControllerScript followAGV;

    /// <summary>
    /// Follow anti gravity vehicle
    /// </summary>
    public AGVControllerScript FollowAGV
    {
        get
        {
            return followAGV;
        }
        set
        {
            if (value != null)
            {
                followAGV = value;
            }
        }
    }

    /// <summary>
    /// Update
    /// </summary>
    private void Update()
    {
        if (followAGV != null)
        {
            if (Input.GetButtonDown("Camera"))
            {
                switch (cameraState)
                {
                    case ECameraState.ThirdPerson:
                        cameraState = ECameraState.FirstPerson;
                        break;
                    case ECameraState.FirstPerson:
                        cameraState = ECameraState.ThirdPerson;
                        break;
                }
            }
            if (cameraState == ECameraState.FirstPerson)
            {
                Transform t = followAGV.transform;
                transform.position = t.position + (t.right * firstPersonOffset.x) + (t.up * firstPersonOffset.y) + (t.forward * firstPersonOffset.z);
                transform.rotation = t.rotation;
            }
        }
    }

    /// <summary>
    /// Fixed update
    /// </summary>
    private void FixedUpdate()
    {
        if (followAGV != null)
        {
            Transform t = followAGV.transform;
            if (cameraState == ECameraState.ThirdPerson)
            {
                transform.position = Vector3.Slerp(transform.position, t.position + (t.right * thirdPersonOffset.x) + (t.up * thirdPersonOffset.y) + (t.forward * (followAGV.IsLookingBehind ? -thirdPersonOffset.z : thirdPersonOffset.z)), slerpTimeMultiplier * Time.fixedDeltaTime);
                if (followAGV.IsOnAntiGravity)
                {
                    transform.rotation = Quaternion.Slerp(transform.rotation, followAGV.transform.rotation, slerpTimeMultiplier * Time.fixedDeltaTime);
                }
                else
                {
                    transform.LookAt(Vector3.Slerp(transform.position + transform.forward, t.position, slerpTimeMultiplier * Time.fixedDeltaTime));
                }
            }
        }
    }
}