Added winddown to space drugs effect (#25652)

added winddown to drug effect

Content.Client/Drugs/DrugOverlaySystem.cs

@@ -38,6 +38,7 @@ public sealed class DrugOverlaySystem : EntitySystem
     private void OnPlayerDetached(EntityUid uid, SeeingRainbowsComponent component, LocalPlayerDetachedEvent args)
     {
         _overlay.Intoxication = 0;
+        _overlay.TimeTicker = 0;
         _overlayMan.RemoveOverlay(_overlay);
     }
 
@@ -52,6 +53,7 @@ public sealed class DrugOverlaySystem : EntitySystem
         if (_player.LocalEntity == uid)
         {
             _overlay.Intoxication = 0;
+            _overlay.TimeTicker = 0;
             _overlayMan.RemoveOverlay(_overlay);
         }
     }

Content.Client/Drugs/RainbowOverlay.cs

@@ -20,6 +20,7 @@ public sealed class RainbowOverlay : Overlay
     private readonly ShaderInstance _rainbowShader;
 
     public float Intoxication = 0.0f;
+    public float TimeTicker = 0.0f;
 
     private const float VisualThreshold = 10.0f;
     private const float PowerDivisor = 250.0f;
@@ -48,7 +49,17 @@ public sealed class RainbowOverlay : Overlay
             return;
 
         var timeLeft = (float) (time.Value.Item2 - time.Value.Item1).TotalSeconds;
-        Intoxication += (timeLeft - Intoxication) * args.DeltaSeconds / 16f;
+
+        TimeTicker += args.DeltaSeconds;
+
+        if (timeLeft - TimeTicker > timeLeft / 16f)
+        {
+            Intoxication += (timeLeft - Intoxication) * args.DeltaSeconds / 16f;
+        }
+        else
+        {
+            Intoxication -= Intoxication/(timeLeft - TimeTicker) * args.DeltaSeconds;
+        }
     }
 
     protected override bool BeforeDraw(in OverlayDrawArgs args)