From bd887c1f2738aa672420c51ab45af02660776d4b Mon Sep 17 00:00:00 2001
From: biwa <6475593+biwa@users.noreply.github.com>
Date: Mon, 25 Oct 2021 00:32:10 +0200
Subject: [PATCH] Fixed an issue where thing positions were modified even when
 the new position was the same as the old one. Fixes #644

---
 Source/Core/Map/Thing.cs | 44 +++++++++++++++++++++-------------------
 1 file changed, 23 insertions(+), 21 deletions(-)

diff --git a/Source/Core/Map/Thing.cs b/Source/Core/Map/Thing.cs
index ecd8c524..2925ee26 100755
--- a/Source/Core/Map/Thing.cs
+++ b/Source/Core/Map/Thing.cs
@@ -422,39 +422,41 @@ namespace CodeImp.DoomBuilder.Map
 		// NOTE: This does not update sector! (call DetermineSector)
 		public void Move(Vector3D newpos)
 		{
-			BeforePropsChange();
-			
-			// Change position
-			this.pos = newpos;
-			
-			if(type != General.Map.Config.Start3DModeThingType)
-				General.Map.IsChanged = true;
+			if (newpos != pos)
+			{
+				BeforePropsChange();
+
+				// Change position
+				this.pos = newpos;
+
+				if (type != General.Map.Config.Start3DModeThingType)
+					General.Map.IsChanged = true;
+			}
 		}
 
 		// This moves the thing
 		// NOTE: This does not update sector! (call DetermineSector)
 		public void Move(Vector2D newpos)
 		{
-			BeforePropsChange();
-			
-			// Change position
-			this.pos = new Vector3D(newpos.x, newpos.y, pos.z);
-			
-			if(type != General.Map.Config.Start3DModeThingType)
-				General.Map.IsChanged = true;
+			Vector3D p = new Vector3D(newpos.x, newpos.y, pos.z);
+
+			if (p != pos)
+			{
+				BeforePropsChange();
+
+				// Change position
+				this.pos = p;
+
+				if (type != General.Map.Config.Start3DModeThingType)
+					General.Map.IsChanged = true;
+			}
 		}
 
 		// This moves the thing
 		// NOTE: This does not update sector! (call DetermineSector)
 		public void Move(double x, double y, double zoffset)
 		{
-			BeforePropsChange();
-			
-			// Change position
-			this.pos = new Vector3D(x, y, zoffset);
-			
-			if(type != General.Map.Config.Start3DModeThingType)
-				General.Map.IsChanged = true;
+			Move(new Vector3D(x, y, zoffset));
 		}
 		
 		// This rotates the thing