Eject casings some distance from the gun (#18081)

Makes bullet casings launch a bit away from you when shooting a gun. Cycling still drops it at your feet.

---------

Co-authored-by: Kevin Zheng <kevinz5000@gmail.com>

Content.Server/Weapons/Ranged/Systems/GunSystem.cs

@@ -171,7 +171,7 @@ public sealed partial class GunSystem : SharedGunSystem
 
                     // Something like ballistic might want to leave it in the container still
                     if (!cartridge.DeleteOnSpawn && !Containers.IsEntityInContainer(ent!.Value))
-                        EjectCartridge(ent.Value);
+                        EjectCartridge(ent.Value, angle);
 
                     Dirty(cartridge);
                     break;

Content.Shared/Weapons/Ranged/Systems/SharedGunSystem.cs

@@ -377,6 +377,7 @@ public abstract partial class SharedGunSystem : EntitySystem
     /// </summary>
     protected void EjectCartridge(
         EntityUid entity,
+        Angle? angle = null,
         bool playSound = true)
     {
         // TODO: Sound limit version.
@@ -389,6 +390,13 @@ public abstract partial class SharedGunSystem : EntitySystem
         TransformSystem.SetLocalRotation(xform, Random.NextAngle());
         TransformSystem.SetCoordinates(entity, xform, coordinates);
 
+        // decides direction the casing ejects and only when not cycling
+        if (angle != null)
+        {
+            Angle ejectAngle = angle.Value;
+            ejectAngle += 3.7f; // 212 degrees; casings should eject slightly to the right and behind of a gun
+            ThrowingSystem.TryThrow(entity, ejectAngle.ToVec().Normalized() / 100, 5f);
+        }
         if (playSound && TryComp<CartridgeAmmoComponent>(entity, out var cartridge))
         {
             Audio.PlayPvs(cartridge.EjectSound, entity, AudioParams.Default.WithVariation(0.05f).WithVolume(-1f));

Resources/Prototypes/Entities/Objects/Weapons/Guns/Ammunition/Cartridges/base_cartridge.yml

@@ -22,3 +22,8 @@
   - type: Item
     size: 1
   - type: SpaceGarbage
+  - type: EmitSoundOnLand
+    sound:
+      path: /Audio/Weapons/Guns/Casings/casing_fall_2.ogg
+      params:
+        volume: -1