Re-organize all projects (#4166)

Content.Server/ParticleAccelerator/ParticleAcceleratorPartSystem.cs

@@ -0,0 +1,42 @@
+#nullable enable
+using Content.Server.ParticleAccelerator.Components;
+using JetBrains.Annotations;
+using Robust.Shared.GameObjects;
+
+namespace Content.Server.ParticleAccelerator
+{
+    [UsedImplicitly]
+    public class ParticleAcceleratorPartSystem : EntitySystem
+    {
+        public override void Initialize()
+        {
+            base.Initialize();
+
+            EntityManager.EventBus.SubscribeEvent<RotateEvent>(EventSource.Local, this, RotateEvent);
+            SubscribeLocalEvent<ParticleAcceleratorPartComponent, PhysicsBodyTypeChangedEvent>(BodyTypeChanged);
+        }
+
+        public override void Shutdown()
+        {
+            base.Shutdown();
+
+            UnsubscribeLocalEvent<ParticleAcceleratorPartComponent, PhysicsBodyTypeChangedEvent>();
+        }
+
+        private static void BodyTypeChanged(
+            EntityUid uid,
+            ParticleAcceleratorPartComponent component,
+            PhysicsBodyTypeChangedEvent args)
+        {
+            component.OnAnchorChanged();
+        }
+
+        private static void RotateEvent(RotateEvent ev)
+        {
+            if (ev.Sender.TryGetComponent(out ParticleAcceleratorPartComponent? part))
+            {
+                part.Rotated();
+            }
+        }
+    }
+}