init

Assets/Scripts/EnemyController.cs

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+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class EnemyController : MonoBehaviour{
+
+    public float speed;
+    Vector2 velocity = Vector2.zero;
+    [Range(0, .3f)] public float movementSmoothing = .1f;
+    public GameObject bloodExplosion;
+
+    public float turnTime;
+    float time;
+    float horizontalFacing = 1;
+
+    GameObject player;
+    Rigidbody2D rb2d;
+
+    [Space]
+    public Transform boxDetectionPos;
+    public LayerMask whatIsPlayer;
+    public float boxDetectionSize;
+    bool playerDetected;
+    bool detectPlayer;
+
+    [Space]
+    public Animator anim;
+
+    // Start is called before the first frame update
+    void Start(){
+        rb2d = GetComponent<Rigidbody2D>();
+    }
+
+    bool dead;
+
+    // Update is called once per frame
+    void Update(){
+        if (!playerDetected){
+            time += Time.deltaTime;
+            if (time >= turnTime){
+                horizontalFacing *= -1;
+                Flip(horizontalFacing);
+                time = 0;
+            }
+
+            detectPlayer = Physics2D.OverlapCircle(boxDetectionPos.position, boxDetectionSize, whatIsPlayer);
+            if (detectPlayer){
+                anim.SetBool("Running", true);
+                playerDetected = true;
+            }
+        }
+        else{
+            if(Mathf.Abs(player.transform.position.x - transform.position.x) >= .1f ){
+                Flip(Mathf.RoundToInt(Mathf.Clamp((player.transform.position.x - transform.position.x) * 100, -1f, 1f)));
+            }
+        }
+    }
+
+    void FixedUpdate(){
+        if (player != null && playerDetected && !dead){
+            Vector2 targetVelocity = new Vector2(Mathf.RoundToInt(Mathf.Clamp(player.transform.position.x - transform.position.x, -1f, 1f)) * speed, rb2d.velocity.y);
+            rb2d.velocity = Vector2.SmoothDamp(rb2d.velocity, targetVelocity, ref velocity, movementSmoothing);
+        }
+    }
+
+    void Flip(float h){
+        transform.localScale = new Vector3(Mathf.Abs(transform.localScale.x) * h, transform.localScale.y, transform.localScale.z);
+    }
+
+    public void WhoIsPlayer(GameObject player){
+        this.player = player;
+    }
+
+    public void Die(){
+        GetComponent<CapsuleCollider2D>().isTrigger = true;
+        rb2d.velocity = Vector2.zero;
+        rb2d.AddForce(new Vector2(-horizontalFacing * 10, 15), ForceMode2D.Impulse);
+        Invoke("DeathExplode", 1);
+        anim.SetTrigger("Die");
+        dead = true;
+    }
+
+    void DeathExplode(){
+        Instantiate(bloodExplosion, transform.position, Quaternion.identity);
+        Destroy(gameObject);
+    }
+
+    void OnTriggerEnter2D(Collider2D col){
+        if(col.gameObject.tag == "InstantDeath"){
+            Die();
+        }
+    }
+
+    void OnDrawGizmos(){
+        Gizmos.color = Color.red;
+        Gizmos.DrawWireSphere(boxDetectionPos.position, boxDetectionSize);
+    }
+}