SeqEffect / Auto-clear Erekir lost sectors

core/src/mindustry/entities/effect/SeqEffect.java

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+package mindustry.entities.effect;
+
+import mindustry.entities.*;
+
+/**
+ * Renders multiple particle effects in sequence.
+ * Will not work correctly for effects that modify life dynamically.
+ * */
+public class SeqEffect extends Effect{
+    public Effect[] effects = {};
+
+    public SeqEffect(){
+        clip = 100f;
+    }
+
+    public SeqEffect(Effect... effects){
+        this();
+        this.effects = effects;
+    }
+
+    @Override
+    public void init(){
+        lifetime = 0f;
+        for(Effect f : effects){
+            f.init();
+            clip = Math.max(clip, f.clip);
+            lifetime += f.lifetime;
+        }
+    }
+
+    @Override
+    public void render(EffectContainer e){
+        var cont = e.inner();
+        float life = e.time, sum = 0f;
+        for(int i = 0; i < effects.length; i++){
+            var fx = effects[i];
+            if(life <= fx.lifetime + sum){
+                cont.set(e.id + i, e.color, life - sum, fx.lifetime, e.rotation, e.x, e.y, e.data);
+                fx.render(cont);
+                clip = Math.max(clip, fx.clip);
+                break;
+            }
+            sum += fx.lifetime;
+        }
+    }
+}