TO SQUASH: Added laser firing.

Assets/Prefabs/Horizontal Laser Component.prefab

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Assets/Prefabs/Vertical Laser Component.prefab

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Assets/Scenes/Game.unity

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Assets/Scripts/Game/HorizontalLaser.cs

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+using UnityEngine;
+
+public class HorizontalLaser : MonoBehaviour
+{
+    public GameObject horizontalLaserPrefab;
+
+    public bool canFireLeft = true;
+
+    public bool canFireRight = true;
+
+    private Bounds bounds;
+
+    private bool canFire = true;
+
+    // Start is called once before the first execution of Update after the MonoBehaviour is created
+    void Start()
+    {
+        SpriteRenderer spriteRenderer = GetComponent<SpriteRenderer>();
+        bounds = spriteRenderer.bounds;
+
+        var walls = GameObject.FindGameObjectsWithTag("Wall");
+
+        if (walls.Length > 0)
+        {
+            // Cap the firing ability if the bar is already intersecting with a wall.
+            foreach (var wall in walls)
+            {
+                if (wall.GetComponent<Collider2D>().bounds.Intersects(bounds))
+                {
+                    canFire = false;
+                    break;
+                }
+            }
+        }
+    }
+
+    // Update is called once per frame
+    void FixedUpdate()
+    {
+        if (canFire)
+        {
+            if (canFireLeft)
+            {
+                Vector3 leftSide = new Vector3(
+                    bounds.min.x - (bounds.size.x / 2.0f),
+                    bounds.center.y, 
+                    bounds.center.z
+                );
+
+                var left = Instantiate(horizontalLaserPrefab, leftSide, Quaternion.identity);
+                var leftLaserScript = left.GetComponent<HorizontalLaser>();
+                leftLaserScript.canFireRight = false;
+
+                Physics2D.IgnoreCollision(
+                    left.GetComponent<Collider2D>(), 
+                    GetComponent<Collider2D>(), 
+                    true
+                );
+            }
+
+            if (canFireRight)
+            {
+                Vector3 rightSide = new Vector3(
+                    bounds.max.x + (bounds.size.x / 2.0f),
+                    bounds.center.y,
+                    bounds.center.z
+                );
+                var right = Instantiate(horizontalLaserPrefab, rightSide, Quaternion.identity);
+                var rightLaserScript = right.GetComponent<HorizontalLaser>();
+                rightLaserScript.canFireLeft = false;
+
+                Physics2D.IgnoreCollision(
+                    right.GetComponent<Collider2D>(), 
+                    GetComponent<Collider2D>(), 
+                    true
+                );
+            }
+
+            canFire = false;
+        }
+    }
+}

Assets/Scripts/Game/HorizontalLaser.cs.meta

@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: c66cc5abc472175528412b7935b3ccbd

Assets/Scripts/Game/Player.cs

@@ -38,6 +38,10 @@ public class Player : MonoBehaviour
 
     public GameObject verticalBarrierPrefab;
 
+    public GameObject horizontalLaserPrefab;
+
+    public GameObject verticalLaserPrefab;
+
     public int lives = 8;
 
     public int score = 0;
@@ -109,6 +113,7 @@ public class Player : MonoBehaviour
             return;
         }
 
+        // TODO: Generalize this to work with subset of the board bounds.
         // Initialize the magnets.
         magnetLeft.GetComponent<SpriteRenderer>().enabled = false;
         magnetRight.GetComponent<SpriteRenderer>().enabled = false;
@@ -367,14 +372,14 @@ public class Player : MonoBehaviour
         muzzleAnimator.SetTrigger("firing");
         laserCount--;
 
-        // if (flipped)
+        if (flipped)
-        // {
+        {
-        //     Instantiate(verticalBarrierPrefab, transform.position, Quaternion.identity);
+            Instantiate(verticalLaserPrefab, transform.position, Quaternion.identity);
-        // }
+        }
-        // else
+        else
-        // {
+        {
-        //     Instantiate(horizontalBarrierPrefab, transform.position, Quaternion.identity);
+            Instantiate(horizontalLaserPrefab, transform.position, Quaternion.identity);
-        // }
+        }
 
         DisableLaser();
     }

Assets/Scripts/Game/VerticalLaser.cs

@@ -0,0 +1,82 @@
+using UnityEngine;
+
+public class VerticalLaser : MonoBehaviour
+{
+    public GameObject verticalLaserPrefab;
+
+    public bool canFireTop = true;
+
+    public bool canFireBottom = true;
+
+    private Bounds bounds;
+
+    private bool canFire = true;
+
+    // Start is called once before the first execution of Update after the MonoBehaviour is created
+    void Start()
+    {
+        SpriteRenderer spriteRenderer = GetComponent<SpriteRenderer>();
+        bounds = spriteRenderer.bounds;
+
+        var walls = GameObject.FindGameObjectsWithTag("Wall");
+
+        if (walls.Length > 0)
+        {
+            // Cap the firing ability if the bar is already intersecting with a wall.
+            foreach (var wall in walls)
+            {
+                if (wall.GetComponent<Collider2D>().bounds.Intersects(bounds))
+                {
+                    canFire = false;
+                    break;
+                }
+            }
+        }
+    }
+
+    // Update is called once per frame
+    void FixedUpdate()
+    {
+        if (canFire)
+        {
+            if (canFireTop)
+            {
+                Vector3 topSide = new Vector3(
+                    bounds.center.x,
+                    bounds.max.y + (bounds.size.y / 2.0f),
+                    bounds.center.z
+                );
+
+                var top = Instantiate(verticalLaserPrefab, topSide, Quaternion.identity);
+                var topLaserScript = top.GetComponent<VerticalLaser>();
+                topLaserScript.canFireBottom = false;
+
+                Physics2D.IgnoreCollision(
+                    top.GetComponent<Collider2D>(), 
+                    GetComponent<Collider2D>(), 
+                    true
+                );
+            }
+
+            if (canFireBottom)
+            {
+                Vector3 bottomSide = new Vector3(
+                    bounds.center.x,
+                    bounds.min.y - (bounds.size.y / 2.0f),
+                    bounds.center.z
+                );
+                var bottom = Instantiate(verticalLaserPrefab, bottomSide, Quaternion.identity);
+                var bottomLaserScript = bottom.GetComponent<VerticalLaser>();
+                bottomLaserScript.canFireTop = false;
+
+                Physics2D.IgnoreCollision(
+                    bottom.GetComponent<Collider2D>(), 
+                    GetComponent<Collider2D>(), 
+                    true
+                );
+            }
+
+            canFire = false;
+        }
+    }
+}

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