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Assets/Scripts/Enemies/BulletMovement.cs

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+using System.Collections;
+using System.Collections.Generic;
+using UnityEngine;
+
+public class BulletMovement : MonoBehaviour
+{
+    public enum BulletMovementType
+    {
+        Linear, ZigZag, Wave
+    }
+
+    [Header("General settings")]
+    public BulletMovementType movementType;
+    public int damage = 1;
+    public float speed=1;
+    public float lifetime = 5;
+
+    //Wave data
+    [Header("Wave settings")]
+    [DrawIf("movementType", BulletMovementType.Linear, DrawIfAttribute.DisablingType.ReadOnly, DrawIfAttribute.Comparator.NotEqual)]
+    public float waveLength = 1;
+    [DrawIf("movementType", BulletMovementType.Linear, DrawIfAttribute.DisablingType.ReadOnly, DrawIfAttribute.Comparator.NotEqual)]
+    public float waveAmplitude = 1;
+
+    [Space(3)]
+    public GameObject father = null;
+
+    [Header("Materials")]
+    public Material regularMat;
+    public Material waveMat;
+    public Material zigzagMat;
+
+    [Header("VFX")]
+    public GameObject explosionParticle;
+
+    private float timestamp = 0;
+    private Vector3 lastPosition;
+    private Vector3 startPosition;
+    
+    private void setUp()
+    {
+        lastPosition = transform.position;
+        startPosition = transform.position;
+
+        gameObject.LeanScale(transform.localScale, .75f).setFrom(Vector3.zero).setEaseOutElastic();
+        timestamp = Time.time;
+
+        switch (movementType)
+        {
+            case BulletMovementType.Linear:
+                GetComponent<ParticleSystemRenderer>().material = regularMat;
+                break;
+            case BulletMovementType.Wave:
+                GetComponent<ParticleSystemRenderer>().material = waveMat;
+                break;
+            case BulletMovementType.ZigZag:
+                GetComponent<ParticleSystemRenderer>().material = zigzagMat;
+                break;
+        }
+
+        CancelInvoke();
+        InvokeRepeating(nameof(hitScan), 0, .25f);
+        Invoke(nameof(shutDown), lifetime);
+    }
+    private void Start()
+    {
+        setUp();
+    }
+
+    private void OnEnable()
+    {
+        setUp();
+    }
+    
+    void Update()
+    {
+        Vector3 frameOffset = Vector3.zero;
+        frameOffset += transform.position+transform.forward * speed * Time.deltaTime;
+
+        if (movementType == BulletMovementType.Wave)
+        {
+            float sinFunc = Mathf.Asin(Mathf.Sin((Time.time - timestamp) * 1 / waveLength + Mathf.PI*.67f)) * waveAmplitude * Time.deltaTime;
+            frameOffset += sinFunc * transform.right;
+        }
+        else if (movementType == BulletMovementType.ZigZag)
+        {
+            float sinFunc = (Utils.step(Mathf.Sin((Time.time - timestamp) * 1 / waveLength + Mathf.PI*.67f ), 0)*2-1)*waveAmplitude*Time.deltaTime;
+            frameOffset += sinFunc * transform.right;
+        }
+
+
+        transform.position = frameOffset;
+    }
+
+    void hitScan()
+    {
+        RaycastHit[] rayHits=Physics.RaycastAll(lastPosition, (transform.position - lastPosition), (transform.position - lastPosition).magnitude, ~LayerMask.GetMask("Bullet"));
+        Debug.DrawLine(lastPosition, transform.position, Color.magenta, .1f);
+
+        foreach (RaycastHit rh in rayHits)
+        {
+            if (rh.collider != null && !rh.collider.isTrigger && rh.collider.gameObject!=gameObject && !rh.collider.gameObject.CompareTag("Player"))
+                bulletHit();
+        }
+
+        lastPosition = transform.position;
+    }
+
+    public int bulletHit()
+    {
+        GetComponent<ParticleSystem>().Stop();
+        ObjectPooler.instance.SpawnFromPool("BulletExplosion", transform.position);
+        Invoke(nameof(shutDown), .1f);
+        return damage;
+    }
+    void shutDown()
+    {
+        if (GameMaster.Instance.Pooler != null)
+            gameObject.SetActive(false);
+        else
+            Destroy(gameObject);
+    }
+}