Added shield effects

core/src/mindustry/entities/def/ShieldComp.java

@@ -1,21 +1,31 @@
 package mindustry.entities.def;
 
+import arc.util.*;
 import mindustry.annotations.Annotations.*;
+import mindustry.content.*;
 import mindustry.gen.*;
 
 @Component
-abstract class ShieldComp implements Healthc{
+abstract class ShieldComp implements Healthc, Posc{
     @Import float health, hitTime;
     @Import boolean dead;
 
     /** Absorbs health damage. */
     float shield;
+    /** Shield opacity. */
+    transient float shieldAlpha = 0f;
 
     @Replace
     @Override
     public void damage(float amount){
         hitTime = 1f;
 
+        boolean hadShields = shield > 0.0001f;
+
+        if(hadShields){
+            shieldAlpha = 1f;
+        }
+
         float shieldDamage = Math.min(shield, amount);
         shield -= shieldDamage;
         amount -= shieldDamage;
@@ -25,6 +35,16 @@ abstract class ShieldComp implements Healthc{
             if(health <= 0 && !dead){
                 kill();
             }
+
+            if(hadShields && shield <= 0.0001f){
+                Fx.unitShieldBreak.at(x(), y(), 0, this);
+            }
         }
     }
+
+    @Override
+    public void update(){
+        shieldAlpha -= Time.delta() / 12f;
+        if(shieldAlpha < 0) shieldAlpha = 0f;
+    }
 }