12 Move Enemy On Path

Author: rickdavidson

Laser Defender/Assets/Prefabs/Enemy.prefab

@@ -56,6 +56,7 @@ MonoBehaviour:
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   - {fileID: 4119412733113868, guid: 513e949a475d76149ac4cb3540576af0, type: 2}
+  moveSpeed: 2
 --- !u!212 &212918273063680576
 SpriteRenderer:
   m_ObjectHideFlags: 1

Laser Defender/Assets/Scenes/Game.unity

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+      propertyPath: m_Icon
+      value: 
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     m_RemovedComponents: []
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@@ -164,11 +179,11 @@ Prefab:
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@@ -194,6 +209,11 @@ Prefab:
       propertyPath: m_RootOrder
       value: 5
       objectReference: {fileID: 0}
+    - target: {fileID: 114331410767387138, guid: 6e491cad0c322694c81cc5833ef869d5,
+        type: 2}
+      propertyPath: moveSpeed
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Laser Defender/Assets/Scripts/EnemyPathing.cs

@@ -5,14 +5,37 @@
 public class EnemyPathing : MonoBehaviour {
 
     [SerializeField] List<Transform> waypoints;
+    [SerializeField] float moveSpeed = 2f;
+    int waypointIndex = 0;
 
 	// Use this for initialization
 	void Start () {
-		
+        transform.position = waypoints[waypointIndex].transform.position;
 	}
 
 	// Update is called once per frame
-	void Update () {
-		
-	}
+	void Update ()
+    {
+        Move();
+    }
+
+    private void Move()
+    {
+        if (waypointIndex <= waypoints.Count - 1)
+        {
+            var targetPosition = waypoints[waypointIndex].transform.position;
+            var movementThisFrame = moveSpeed * Time.deltaTime;
+            transform.position = Vector2.MoveTowards
+                (transform.position, targetPosition, movementThisFrame);
+
+            if (transform.position == targetPosition)
+            {
+                waypointIndex++;
+            }
+        }
+        else
+        {
+            Destroy(gameObject);
+        }
+    }
 }

README.md

@@ -140,4 +140,15 @@ Able to destroy GameObjects which collide with our trigger volume.
 3. Store our path waypoints in our list.
 
 **After watching (learning outcomes)…**
-Create a list to store enemy path waypoints.
+Create a list to store enemy path waypoints.
+
+
+### 12 Move Enemy On Path ###
+
+**In this video (objectives)…**
+
+1. Write pseudocode for our enemy movement.
+2. Use the MoveTowards() method to move the enemy.
+
+**After watching (learning outcomes)…**
+Move an enemy GameObject along a path using waypoints.