DougDiggem/Assets/PlayerController.cs

using UnityEngine;

public class PlayerController : MonoBehaviour
{
    public GameObject DougBody;
    public float walkSpeed;

    Interactable nearestInteractable;
    
    // Start is called once before the first execution of Update after the MonoBehaviour is created
    void Start()
    {
        
    }

    // Update is called once per frame
    void Update()
    {
        RotatePlayerTowardMouse();
        Walk();
        TryInteract();
    }

    void Walk()
    {
        transform.position += DougBody.transform.forward * Input.GetAxis("Vertical") * walkSpeed * Time.deltaTime;
        transform.position += DougBody.transform.right * Input.GetAxis("Horizontal") * walkSpeed * Time.deltaTime;
    }

    void RotatePlayerTowardMouse()
    {
        Vector2 positionOnScreen = Camera.main.WorldToViewportPoint(DougBody.transform.position);
        Vector2 mouseOnScreen = (Vector2)Camera.main.ScreenToViewportPoint(Input.mousePosition);

        float angle = Mathf.Atan2(positionOnScreen.y - mouseOnScreen.y, positionOnScreen.x - mouseOnScreen.x) * Mathf.Rad2Deg;

        DougBody.transform.rotation = Quaternion.Euler(new Vector3(0f, -(angle + 90), 0f));
    }

    void TryInteract()
    {
        if (Input.GetKeyDown(KeyCode.E) && nearestInteractable != null)
        {
            nearestInteractable.Interact();
        }
    }

    private void OnTriggerEnter(Collider other)
    {
        Interactable interactable = other.GetComponent<Interactable>();

        // store nearest interactable if it exists
        if (interactable != null)
        {
            nearestInteractable = interactable;
            interactable.MoveInsideRange();
        }
    }

    private void OnTriggerExit(Collider other)
    {
        // just null out interactables when we leave an interactable trigger (we cant and shouldn't overlap interactables)
        Interactable interactable = other.GetComponent<Interactable>();

        // store nearest interactable if it exists
        if (interactable != null)
        {
            nearestInteractable.MoveOutsideRange();
            nearestInteractable = null;
        }
    }
}