refactor NPCController script, make it abstract, extendable; separate AlienNPC and CafeWaiterNPC

Assets/_PROJECT/Scripts/ModeGeneration/NPCs/NPCController.cs

@@ -0,0 +1,99 @@
+using DG.Tweening;
+using UnityEngine;
+
+public abstract class NPCController : MonoBehaviour
+{
+    private Vector3 mouthClosedScale;
+    private Vector3 mouthOpenScale;
+    private bool isTalking;
+    protected Transform playerTransform;
+
+    public Transform mouthTransform;
+    public float mouthScalingMultiplier = 2.5f;
+    public float mouthMovementDuration = 0.25f;
+
+    public string[] voiceLineKeys;
+
+    // Start is called before the first frame update
+    void Awake()
+    {
+        mouthClosedScale = mouthTransform.localScale;
+        mouthOpenScale = new Vector3(mouthClosedScale.x, mouthClosedScale.y * mouthScalingMultiplier, mouthClosedScale.z);
+
+        isTalking = false;
+    }
+
+    void Start()
+    {
+       
+    }
+
+    // Update is called once per frame
+    void Update()
+    {
+        if (playerTransform != null)
+        {
+            // As if player is on same Y coordinate as this object, to not rotate around Y axis.
+            Vector3 lookTargetPos = new Vector3(playerTransform.position.x, transform.position.y, playerTransform.position.z);
+            transform.LookAt(lookTargetPos);
+        }
+    }
+
+    private void OnTriggerEnter(Collider other)
+    {
+        if (other.gameObject.tag == "Player Head")
+        {
+            playerTransform = other.transform;
+            OnPlayerApproach();
+        }
+    }
+
+    protected virtual void OnPlayerApproach() {}
+
+    private void OnTriggerExit(Collider other)
+    {
+        if (other.gameObject.tag == "Player Head")
+        {
+            playerTransform = null;
+            OnPlayerLeave();
+        }
+    }
+
+    protected virtual void OnPlayerLeave() {}
+
+    public void SpeakVoiceLine(int voiceLineId)
+    {
+        AudioManager.Instance.PlayDialogue(voiceLineKeys[voiceLineId], gameObject);
+    }
+
+    public void StartTalking()
+    {
+        isTalking = true;
+        MoveMouth();
+    }
+
+    public void Stoptalking()
+    {
+        isTalking = false;
+    }
+
+
+    private void MoveMouth()
+    {
+        if (!isTalking)
+        {
+            return;
+        }
+
+        if (mouthTransform.localScale == mouthClosedScale)
+        {
+            mouthTransform.DOScale(mouthOpenScale, mouthMovementDuration);
+        }
+        else
+        {
+            mouthTransform.DOScale(mouthClosedScale, mouthMovementDuration);
+        }
+
+        Invoke("MoveMouth", mouthMovementDuration + 0.01f);
+    }
+}