PA fixes.

Improved unlit layers for control box.

Fixed rotation bugs.

Fixes #3479

Content.Server/GameObjects/Components/PA/ParticleAcceleratorControlBoxComponent.cs

@@ -454,7 +454,7 @@ namespace Content.Server.GameObjects.Components.PA
 
             Vector2i RotateOffset(in Vector2i vec)
             {
-                var rot = new Angle(Owner.Transform.LocalRotation + Math.PI / 2);
+                var rot = new Angle(Owner.Transform.LocalRotation);
                 return (Vector2i) rot.RotateVec(vec);
             }
         }

Content.Server/GameObjects/Components/PA/ParticleProjectileComponent.cs

@@ -82,9 +82,9 @@ namespace Content.Server.GameObjects.Components.PA
 
             physicsComponent
                 .EnsureController<BulletController>()
-                .LinearVelocity = angle.ToVec() * 20f;
+                .LinearVelocity = angle.ToWorldVec() * 20f;
 
-            Owner.Transform.LocalRotation = new Angle(angle + Angle.FromDegrees(180));
+            Owner.Transform.LocalRotation = angle;
             Timer.Spawn(3000, () => Owner.Delete());
         }
     }

Resources/Changelog/Parts/pa_fix.yml

@@ -0,0 +1,4 @@
+author: PJB
+changes:
+  - type: Fix
+    message: Fixed the Particle Accelerator

Resources/Textures/Constructible/Specific/Engines/PA/control_box.rsi/meta.json

@@ -32,7 +32,13 @@
     },
     {
       "name": "unlitp3",
-      "directions": 4
+      "directions": 4,
+      "delays": [
+        [0.5, 0.5],
+        [0.5, 0.5],
+        [0.5, 0.5],
+        [0.5, 0.5]
+      ]
     },
     {
       "name": "boxw",