From d7eb3b1c5c3faf2f9cf363407790bd383feb0070 Mon Sep 17 00:00:00 2001
From: themias <89101928+themias@users.noreply.github.com>
Date: Fri, 16 Feb 2024 18:37:56 -0500
Subject: [PATCH] Allow t-ray to penetrate carpets and puddles (#25276)

* Allow t-ray to penetrate carpets and puddles

* handle edge cases
---
 Content.Client/SubFloor/SubFloorHideSystem.cs    | 13 +++++++++++++
 Content.Shared/SubFloor/SubFloorHideComponent.cs |  7 +++++++
 2 files changed, 20 insertions(+)

diff --git a/Content.Client/SubFloor/SubFloorHideSystem.cs b/Content.Client/SubFloor/SubFloorHideSystem.cs
index 482ab94a00..64d3afc640 100644
--- a/Content.Client/SubFloor/SubFloorHideSystem.cs
+++ b/Content.Client/SubFloor/SubFloorHideSystem.cs
@@ -1,3 +1,4 @@
+using Content.Shared.DrawDepth;
 using Content.Shared.SubFloor;
 using Robust.Client.GameObjects;
 
@@ -62,6 +63,18 @@ public sealed class SubFloorHideSystem : SharedSubFloorHideSystem
         }
 
         args.Sprite.Visible = hasVisibleLayer || revealed;
+
+        // allows a t-ray to show wires/pipes above carpets/puddles
+        if (scannerRevealed)
+        {
+            component.OriginalDrawDepth ??= args.Sprite.DrawDepth;
+            args.Sprite.DrawDepth = (int) Shared.DrawDepth.DrawDepth.FloorObjects + 1;
+        }
+        else if (component.OriginalDrawDepth.HasValue)
+        {
+            args.Sprite.DrawDepth = component.OriginalDrawDepth.Value;
+            component.OriginalDrawDepth = null;
+        }
     }
 
     private void UpdateAll()
diff --git a/Content.Shared/SubFloor/SubFloorHideComponent.cs b/Content.Shared/SubFloor/SubFloorHideComponent.cs
index 284a4b871f..3b29388fa8 100644
--- a/Content.Shared/SubFloor/SubFloorHideComponent.cs
+++ b/Content.Shared/SubFloor/SubFloorHideComponent.cs
@@ -45,5 +45,12 @@ namespace Content.Shared.SubFloor
         /// </summary>
         [DataField("visibleLayers")]
         public HashSet<Enum> VisibleLayers = new() { SubfloorLayers.FirstLayer };
+
+        /// <summary>
+        /// This is used for storing the original draw depth of a t-ray revealed entity.
+        /// e.g. when a t-ray revealed cable is drawn above a carpet.
+        /// </summary>
+        [DataField]
+        public int? OriginalDrawDepth;
     }
 }
-- 
2.52.0