TO SQUASH: Added shooting bars.

Assets/Scripts/Game/Balls/GlassBall.cs

@@ -1,24 +1,18 @@
 using UnityEngine;
 using System.Collections;
 
-public class GlassBall : MonoBehaviour
+public class GlassBall : BallBase
 {
-    private Animator animator;
-
-    public AudioClip spawnSound;
-
-    public AudioClip bounceSound;
-
-    public AudioClip hitSound;
-
     public AudioClip breakSound;
 
-    private AudioSource audioSource;
-
-    private Vector2 speed;
-
     private int health = 3;
 
+    private bool isBroken = false;
+
+    private float damageTimer = 0.0f;
+
+    private float damageCooldown = 0.5f;
+
     private SpriteRenderer spriteRenderer;
 
     // Start is called once before the first execution of Update after the MonoBehaviour is created
@@ -35,6 +29,11 @@ public class GlassBall : MonoBehaviour
     // Update is called once per frame
     void FixedUpdate()
     {
+        if (damageTimer > 0.0f)
+        {
+            damageTimer -= Time.fixedDeltaTime;
+        }
+
         AnimatorStateInfo stateInfo = animator.GetCurrentAnimatorStateInfo(0);
 
         if (stateInfo.IsName("GlassBallMove1") ||
@@ -54,32 +53,56 @@ public class GlassBall : MonoBehaviour
             speed = Vector2.Reflect(speed, contact.normal);
 
             // Glass balls take damage when colliding with other GlassBalls
-            // TODO: Check for collisions with a bar.
             if (collision.gameObject.CompareTag("GlassBall"))
             {
-                health--;
-
-                if (health < 0)
-                {
-                    health = 0;
-                }
-
-                animator.SetInteger("health", health);
-
-                if (health > 0)
-                {
-                    audioSource.PlayOneShot(hitSound);
-                } else
-                {
-                    audioSource.PlayOneShot(breakSound);
-                }
+                Damage();
             }
         }
     }
 
+    private void Damage()
+    {
+        if (isBroken || damageTimer > 0.0f)
+        {
+            return;
+        }
+
+        health--;
+        damageTimer = damageCooldown;
+
+        if (health < 0)
+        {
+            health = 0;
+        }
+
+        animator.SetInteger("health", health);
+
+        if (health > 0)
+        {
+            audioSource.PlayOneShot(hitSound);
+        }
+        else
+        {
+            audioSource.PlayOneShot(breakSound);
+        }
+    }
+
     public void Break()
     {
+        if (isBroken)
+        {
+            return;
+        }
+
+        isBroken = true;
         spriteRenderer.enabled = false;
+        var collider = GetComponent<Collider2D>();
+
+        if (collider != null)
+        {
+            collider.enabled = false;
+        }
+
         StartCoroutine(BreakCoroutine());
     }
 
@@ -89,4 +112,28 @@ public class GlassBall : MonoBehaviour
 
         Destroy(gameObject);
     }
+
+    void OnTriggerEnter2D(Collider2D other)
+    {
+        if(other.gameObject.CompareTag("Bar"))
+        {
+            Damage();
+
+            // Destroy all bar segments when the ball hits a bar.
+            var barSegments = GameObject.FindGameObjectsWithTag("Bar");
+
+            foreach (var barSegment in barSegments)
+            {
+                Destroy(barSegment);
+            }
+
+            // Notify the player that the bar has been hit.
+            var player = GameObject.FindGameObjectWithTag("Player");
+
+            if (player != null)
+            {
+                player.GetComponent<Player>().OnBarHit();
+            }
+        }
+    }
 }