Fixed #3053

core/src/mindustry/entities/abilities/ShieldRegenFieldAbility.java

@@ -0,0 +1,48 @@
+package mindustry.entities.abilities;
+
+import arc.util.*;
+import mindustry.content.*;
+import mindustry.entities.*;
+import mindustry.gen.*;
+
+public class ShieldRegenFieldAbility extends Ability{
+    public float amount = 1, max = 100f, reload = 100, range = 60;
+    public Effect applyEffect = Fx.shieldApply;
+    public Effect activeEffect = Fx.shieldWave;
+
+    protected float timer;
+    protected boolean applied = false;
+
+    ShieldRegenFieldAbility(){}
+
+    public ShieldRegenFieldAbility(float amount, float max, float reload, float range){
+        this.amount = amount;
+        this.max = max;
+        this.reload = reload;
+        this.range = range;
+    }
+
+    @Override
+    public void update(Unit unit){
+        timer += Time.delta;
+
+        if(timer >= reload){
+            applied = false;
+
+            Units.nearby(unit.team, unit.x, unit.y, range, other -> {
+                if(other.shield < max){
+                    other.shield = Math.max(other.shield + amount, max);
+                    other.shieldAlpha = 1f; //TODO may not be necessary
+                    applyEffect.at(unit);
+                    applied = true;
+                }
+            });
+
+            if(applied){
+                activeEffect.at(unit);
+            }
+
+            timer = 0f;
+        }
+    }
+}