Closes #9498

core/src/mindustry/entities/part/DrawPart.java

@@ -18,7 +18,7 @@ public abstract class DrawPart{
     public int recoilIndex = -1;
 
     public abstract void draw(PartParams params);
-    public abstract void load(String name);
+    public void load(String name){}
     public void getOutlines(Seq<TextureRegion> out){}
 
     /** Parameters for drawing a part in draw(). */

core/src/mindustry/entities/part/EffectSpawnerPart.java

@@ -0,0 +1,57 @@
+package mindustry.entities.part;
+
+import arc.graphics.*;
+import arc.graphics.g2d.*;
+import arc.math.*;
+import mindustry.*;
+import mindustry.content.*;
+import mindustry.entities.*;
+import mindustry.graphics.*;
+
+import static arc.math.Mathf.random;
+import static arc.util.Tmp.*;
+
+/**Spawns effects in a rectangle centered on x and y.*/
+public class EffectSpawnerPart extends DrawPart{
+    public float x, y, width, height, rotation;
+    public boolean mirror = false;
+
+    public float effectChance = 0.1f, effectRot, effectRandRot;
+    public Effect effect = Fx.sparkShoot;
+    public Color effectColor = Color.white;
+
+    public boolean useProgress = true;
+    public PartProgress progress = PartProgress.warmup;
+
+    /**Shows the spawn rectangles in red.*/
+    public boolean debugDraw = false;
+
+    @Override
+    public void draw(PartParams params){
+        if(debugDraw){
+            for(int i = 0; i < (mirror ? 2 : 1); i++){
+                float sign = (i == 0 ? 1f : -1f), rot = params.rotation + (rotation * sign);
+                v1.set(x * sign, y).rotate(params.rotation - 90).add(params.x, params.y);
+
+                float z = Draw.z();
+                Draw.z(Layer.buildBeam);
+                Draw.color(Color.red);
+                Draw.rect("error", v1.x, v1.y, width, height, rot - 90f);
+                Draw.color();
+                Draw.z(z);
+            }
+        }
+
+        if(Vars.state.isPaused()) return;
+
+        for(int i = 0; i < (mirror ? 2 : 1); i++){
+            if(!Vars.state.isPaused() && Mathf.chanceDelta(effectChance * (useProgress ? progress.getClamp(params) : 1f))){
+                float sign = (i == 0 ? 1f : -1f), rot = params.rotation + (rotation * sign);
+                v1.set(x * sign, y).rotate(params.rotation - 90).add(params.x, params.y);
+                v1.add(v2.set(random(-height * 0.5f, height * 0.5f), random(-width * 0.5f, width * 0.5f)).rotate(rot));
+
+                effect.at(v1.x, v1.y, rot + (effectRot * sign) + random(-effectRandRot, effectRandRot), effectColor);
+            }
+        }
+    }
+}