Visual modes: selected objects are not highlighted when "Toggle highlight" (H key) option is set to off.

Error Checks Mode: added linedef index to message text of all linedef-related errors.
UDMF: wall texture offsets are now rounded when user edits them via cursor keys or mouse dragging (because they are stored as integers anyway).

Source/Plugins/BuilderModes/ErrorChecks/ResultLineMissingFront.cs

@@ -110,7 +110,7 @@ namespace CodeImp.DoomBuilder.BuilderModes
 		// This must return the string that is displayed in the listbox
 		public override string ToString()
 		{
-			return "Linedef is missing front side";
+            return "Linedef " + line.Index + " is missing front side";
 		}
 		
 		// Rendering

Source/Plugins/BuilderModes/ErrorChecks/ResultLineMissingSides.cs

@@ -143,7 +143,7 @@ namespace CodeImp.DoomBuilder.BuilderModes
 		// This must return the string that is displayed in the listbox
 		public override string ToString()
 		{
-			return "Linedef is missing both sides";
+            return "Linedef " + line.Index + " is missing both sides";
 		}
 		
 		// Rendering

Source/Plugins/BuilderModes/ErrorChecks/ResultLineNotDoubleSided.cs

@@ -108,7 +108,7 @@ namespace CodeImp.DoomBuilder.BuilderModes
 		// This must return the string that is displayed in the listbox
 		public override string ToString()
 		{
-			return "Linedef is marked double-sided but has no back side";
+            return "Linedef " + line.Index + " is marked double-sided but has no back side";
 		}
 		
 		// Rendering

Source/Plugins/BuilderModes/ErrorChecks/ResultLineNotSingleSided.cs

@@ -73,7 +73,7 @@ namespace CodeImp.DoomBuilder.BuilderModes
 		// This must return the string that is displayed in the listbox
 		public override string ToString()
 		{
-			return "Linedef is marked single-sided but has two sides";
+            return "Linedef " + line.Index + " is marked single-sided but has two sides";
 		}
 		
 		// Rendering

Source/Plugins/BuilderModes/ErrorChecks/ResultLineOverlapping.cs

@@ -73,7 +73,7 @@ namespace CodeImp.DoomBuilder.BuilderModes
 		// This must return the string that is displayed in the listbox
 		public override string ToString()
 		{
-			return "Linedefs are overlapping and references different sectors";
+            return "Linedefs " + line1.Index + " and " + line2.Index + " are overlapping and references different sectors";
 		}
 		
 		// Rendering

Source/Plugins/BuilderModes/ErrorChecks/ResultTextureMissing.cs

@@ -78,13 +78,13 @@ namespace CodeImp.DoomBuilder.BuilderModes
             switch (part)
             {
                 case SidedefPart.Upper:
-					return "Sidedef has missing upper texture (" + sidestr + " side)";
+					return "Sidedef " + side.Index + " has missing upper texture (" + sidestr + " side)";
 
                 case SidedefPart.Middle:
-					return "Sidedef has missing middle texture (" + sidestr + " side)";
+                    return "Sidedef " + side.Index + " has missing middle texture (" + sidestr + " side)";
 
                 case SidedefPart.Lower:
-					return "Sidedef has missing lower texture (" + sidestr + " side)";
+                    return "Sidedef " + side.Index + " has missing lower texture (" + sidestr + " side)";
 
                 default:
                     return "ERROR";

Source/Plugins/BuilderModes/ErrorChecks/ResultUnknownThing.cs

@@ -1,6 +1,4 @@
 using System;
-//using System.Collections.Generic;
-//using System.Text;
 using CodeImp.DoomBuilder.Map;
 using CodeImp.DoomBuilder.Rendering;
 

Source/Plugins/BuilderModes/General/BuilderPlug.cs

@@ -149,7 +149,16 @@ namespace CodeImp.DoomBuilder.BuilderModes
 		public float HighlightRange { get { return highlightrange; } }
 		public float HighlightThingsRange { get { return highlightthingsrange; } }
 		public float SplitLinedefsRange { get { return splitlinedefsrange; } }
-		public bool UseHighlight { get { return usehighlight; } set { usehighlight = value; } }
+		public bool UseHighlight { 
+            get { 
+                return usehighlight; 
+            } 
+            set { 
+                usehighlight = value;
+                General.Map.Renderer3D.ShowSelection = usehighlight;
+                General.Map.Renderer3D.ShowHighlight = usehighlight;
+            } 
+        }
 		public bool AutoDragOnPaste { get { return autodragonpaste; } set { autodragonpaste = value; } }
 		
 		#endregion

Source/Plugins/BuilderModes/VisualModes/BaseVisualMode.cs

@@ -613,8 +613,11 @@ namespace CodeImp.DoomBuilder.BuilderModes
 				renderer.SetFogMode(true);
 
 				// Set target for highlighting
-				if(BuilderPlug.Me.UseHighlight)
-					renderer.SetHighlightedObject(target.picked);
+                renderer.ShowSelection = BuilderPlug.Me.UseHighlight; //mxd
+
+                if (BuilderPlug.Me.UseHighlight)
+                    renderer.SetHighlightedObject(target.picked);
+                
 				
 				// Begin with geometry
 				renderer.StartGeometry();

Source/Plugins/GZDoomEditing/VisualModes/BaseVisualGeometrySidedef.cs

@@ -365,6 +365,14 @@ namespace CodeImp.DoomBuilder.GZDoomEditing
 			
 			poly = newp;
 		}
+
+        //mxd
+        protected float getRoundedTextureOffset(float offset, float scale) {
+            if (offset == 0f) return 0f;
+            float result = (float)Math.Round(offset * scale);
+            if (result == 0) result = 1f * (offset < 0 ? -1 : 1);
+            return result;
+        }
 		
 		#endregion
 

Source/Plugins/GZDoomEditing/VisualModes/BaseVisualMode.cs

@@ -828,6 +828,8 @@ namespace CodeImp.DoomBuilder.GZDoomEditing
 				renderer.SetFogMode(true);
 
 				// Set target for highlighting
+                renderer.ShowSelection = BuilderPlug.Me.UseHighlight; //mxd
+
 				if(BuilderPlug.Me.UseHighlight)
 					renderer.SetHighlightedObject(target.picked);
 				

Source/Plugins/GZDoomEditing/VisualModes/VisualLower.cs

@@ -236,8 +236,10 @@ namespace CodeImp.DoomBuilder.GZDoomEditing
 			float oldy = Sidedef.Fields.GetValue("offsety_bottom", 0.0f);
 			float scalex = Sidedef.Fields.GetValue("scalex_bottom", 1.0f);
 			float scaley = Sidedef.Fields.GetValue("scaley_bottom", 1.0f);
-			Sidedef.Fields["offsetx_bottom"] = new UniValue(UniversalType.Float, oldx + (float)xy.X * scalex);
-			Sidedef.Fields["offsety_bottom"] = new UniValue(UniversalType.Float, oldy + (float)xy.Y * scaley);
+            Sidedef.Fields["offsetx_bottom"] = new UniValue(UniversalType.Float, oldx + getRoundedTextureOffset((float)xy.X, scalex)); //mxd
+            Sidedef.Fields["offsety_bottom"] = new UniValue(UniversalType.Float, oldy + getRoundedTextureOffset((float)xy.Y, scaley)); //mxd
+            //Sidedef.Fields["offsetx_bottom"] = new UniValue(UniversalType.Float, oldx + (float)xy.X * scalex);
+            //Sidedef.Fields["offsety_bottom"] = new UniValue(UniversalType.Float, oldy + (float)xy.Y * scaley);
 		}
 
 		protected override Point GetTextureOffset()

Source/Plugins/GZDoomEditing/VisualModes/VisualMiddleDouble.cs

@@ -309,8 +309,10 @@ namespace CodeImp.DoomBuilder.GZDoomEditing
 			float oldy = Sidedef.Fields.GetValue("offsety_mid", 0.0f);
 			float scalex = Sidedef.Fields.GetValue("scalex_mid", 1.0f);
 			float scaley = Sidedef.Fields.GetValue("scaley_mid", 1.0f);
-			Sidedef.Fields["offsetx_mid"] = new UniValue(UniversalType.Float, oldx + (float)xy.X * scalex);
-			Sidedef.Fields["offsety_mid"] = new UniValue(UniversalType.Float, oldy + (float)xy.Y * scaley);
+            Sidedef.Fields["offsetx_mid"] = new UniValue(UniversalType.Float, oldx + getRoundedTextureOffset((float)xy.X, scalex)); //mxd
+            Sidedef.Fields["offsety_mid"] = new UniValue(UniversalType.Float, oldy + getRoundedTextureOffset((float)xy.Y, scaley)); //mxd
+			//Sidedef.Fields["offsetx_mid"] = new UniValue(UniversalType.Float, oldx + (float)xy.X * scalex);
+			//Sidedef.Fields["offsety_mid"] = new UniValue(UniversalType.Float, oldy + (float)xy.Y * scaley);
 		}
 
 		protected override Point GetTextureOffset()

Source/Plugins/GZDoomEditing/VisualModes/VisualMiddleSingle.cs

@@ -237,8 +237,10 @@ namespace CodeImp.DoomBuilder.GZDoomEditing
 			float oldy = Sidedef.Fields.GetValue("offsety_mid", 0.0f);
 			float scalex = Sidedef.Fields.GetValue("scalex_mid", 1.0f);
 			float scaley = Sidedef.Fields.GetValue("scaley_mid", 1.0f);
-			Sidedef.Fields["offsetx_mid"] = new UniValue(UniversalType.Float, oldx + (float)xy.X * scalex);
-			Sidedef.Fields["offsety_mid"] = new UniValue(UniversalType.Float, oldy + (float)xy.Y * scaley);
+            Sidedef.Fields["offsetx_mid"] = new UniValue(UniversalType.Float, oldx + getRoundedTextureOffset((float)xy.X, scalex)); //mxd
+            Sidedef.Fields["offsety_mid"] = new UniValue(UniversalType.Float, oldy + getRoundedTextureOffset((float)xy.Y, scaley)); //mxd
+			//Sidedef.Fields["offsetx_mid"] = new UniValue(UniversalType.Float, oldx + (float)xy.X * scalex);
+			//Sidedef.Fields["offsety_mid"] = new UniValue(UniversalType.Float, oldy + (float)xy.Y * scaley);
 		}
 
 		protected override Point GetTextureOffset()

Source/Plugins/GZDoomEditing/VisualModes/VisualUpper.cs

@@ -236,8 +236,10 @@ namespace CodeImp.DoomBuilder.GZDoomEditing
 			float oldy = Sidedef.Fields.GetValue("offsety_top", 0.0f);
 			float scalex = Sidedef.Fields.GetValue("scalex_top", 1.0f);
 			float scaley = Sidedef.Fields.GetValue("scaley_top", 1.0f);
-			Sidedef.Fields["offsetx_top"] = new UniValue(UniversalType.Float, oldx + (float)xy.X * scalex);
-			Sidedef.Fields["offsety_top"] = new UniValue(UniversalType.Float, oldy + (float)xy.Y * scaley);
+            Sidedef.Fields["offsetx_top"] = new UniValue(UniversalType.Float, oldx + getRoundedTextureOffset((float)xy.X, scalex)); //mxd
+            Sidedef.Fields["offsety_top"] = new UniValue(UniversalType.Float, oldy + getRoundedTextureOffset((float)xy.Y, scaley)); //mxd
+			//Sidedef.Fields["offsetx_top"] = new UniValue(UniversalType.Float, oldx + (float)xy.X * scalex);
+			//Sidedef.Fields["offsety_top"] = new UniValue(UniversalType.Float, oldy + (float)xy.Y * scaley);
 		}
 
 		protected override Point GetTextureOffset()