From b9b5b90330b956028de42ad27fa1ab16bbf07487 Mon Sep 17 00:00:00 2001
From: michaeldgg2 <119738087+michaeldgg2@users.noreply.github.com>
Date: Thu, 26 Oct 2023 20:59:59 +0200
Subject: [PATCH] Allow changing ZOffset of renderables in
 ActorPreviewPlaceBuildingPreview

---
 .../Buildings/ActorPreviewPlaceBuildingPreview.cs   | 13 ++++++++++---
 1 file changed, 10 insertions(+), 3 deletions(-)

diff --git a/OpenRA.Mods.Common/Traits/Buildings/ActorPreviewPlaceBuildingPreview.cs b/OpenRA.Mods.Common/Traits/Buildings/ActorPreviewPlaceBuildingPreview.cs
index a36e4ffa06..7a3d1b5089 100644
--- a/OpenRA.Mods.Common/Traits/Buildings/ActorPreviewPlaceBuildingPreview.cs
+++ b/OpenRA.Mods.Common/Traits/Buildings/ActorPreviewPlaceBuildingPreview.cs
@@ -33,6 +33,9 @@ namespace OpenRA.Mods.Common.Traits
 		[Desc("Footprint types to draw above the actor preview.")]
 		public readonly PlaceBuildingCellType FootprintOverPreview = PlaceBuildingCellType.Invalid;
 
+		[Desc("Custom ZOffset of the rendered building preview.")]
+		public readonly int ZOffset = 0;
+
 		protected override IPlaceBuildingPreview CreatePreview(WorldRenderer wr, ActorInfo ai, TypeDictionary init)
 		{
 			return new ActorPreviewPlaceBuildingPreviewPreview(wr, ai, this, init);
@@ -82,10 +85,14 @@ namespace OpenRA.Mods.Common.Traits
 
 			foreach (var r in previewRenderables.OrderBy(WorldRenderer.RenderableZPositionComparisonKey))
 			{
+				var renderable = r;
 				if (info.PreviewAlpha < 1f && r is IModifyableRenderable mr)
-					yield return mr.WithAlpha(mr.Alpha * info.PreviewAlpha);
-				else
-					yield return r;
+					renderable = mr.WithAlpha(mr.Alpha * info.PreviewAlpha);
+
+				if (info.ZOffset != 0)
+					renderable = renderable.WithZOffset(info.ZOffset);
+
+				yield return renderable;
 			}
 
 			if (info.FootprintOverPreview != PlaceBuildingCellType.None)