Puddles & spreader refactor (#15191)

Content.Client/Fluids/PuddleSystem.cs

@@ -0,0 +1,67 @@
+using Content.Client.IconSmoothing;
+using Content.Shared.Fluids;
+using Content.Shared.Fluids.Components;
+using Robust.Client.GameObjects;
+
+namespace Content.Client.Fluids;
+
+public sealed class PuddleSystem : SharedPuddleSystem
+{
+    [Dependency] private readonly IconSmoothSystem _smooth = default!;
+
+    public override void Initialize()
+    {
+        base.Initialize();
+
+        SubscribeLocalEvent<PuddleComponent, AppearanceChangeEvent>(OnPuddleAppearance);
+    }
+
+    private void OnPuddleAppearance(EntityUid uid, PuddleComponent component, ref AppearanceChangeEvent args)
+    {
+        if (args.Sprite == null)
+            return;
+
+        float volume = 1f;
+
+        if (args.AppearanceData.TryGetValue(PuddleVisuals.CurrentVolume, out var volumeObj))
+        {
+            volume = (float) volumeObj;
+        }
+
+        // Update smoothing and sprite based on volume.
+        if (TryComp<IconSmoothComponent>(uid, out var smooth))
+        {
+            if (volume < LowThreshold)
+            {
+                args.Sprite.LayerSetState(0, $"{smooth.StateBase}a");
+                _smooth.SetEnabled(uid, false, smooth);
+            }
+            else if (volume < 0.6f)
+            {
+                args.Sprite.LayerSetState(0, $"{smooth.StateBase}b");
+                _smooth.SetEnabled(uid, false, smooth);
+            }
+            else
+            {
+                if (!smooth.Enabled)
+                {
+                    args.Sprite.LayerSetState(0, $"{smooth.StateBase}0");
+                    _smooth.SetEnabled(uid, true, smooth);
+                    _smooth.DirtyNeighbours(uid);
+                }
+            }
+        }
+
+        var baseColor = Color.White;
+
+        if (args.AppearanceData.TryGetValue(PuddleVisuals.SolutionColor, out var colorObj))
+        {
+            var color = (Color) colorObj;
+            args.Sprite.Color = color * baseColor;
+        }
+        else
+        {
+            args.Sprite.Color *= baseColor;
+        }
+    }
+}