Changed, Classic modes: displayed mouse map position coordinates are now snapped to current grid size.

Updated model pitch handling to match current GZDoom implementation.
Fixed imprecise vertex coordinates generated by Draw Ellipse mode.
Fixed a resource loading exception when opened map file wad was located in the root of a Directory resource.
Internal: changed output of all InterpolationTools methods from int to float.
Fixed, Internal: InterpolationTools.InterpolateColor() delta usage was inverted.

Source/Core/Data/DirectoryReader.cs

@@ -58,8 +58,13 @@ namespace CodeImp.DoomBuilder.Data
 			wads = new List<WADReader>(wadfiles.Length);
 			foreach(string wadfile in wadfiles)
 			{
-				DataLocation wdl = new DataLocation(DataLocation.RESOURCE_WAD, Path.Combine(location.location, wadfile), false, false, true);
+				//mxd. Don't add the map file. Otherwise DataManager will try to load it twice (and fial).
-				wads.Add(new WADReader(wdl, isreadonly));
+				string wadfilepath = Path.Combine(location.location, wadfile);
+				if(General.Map.FilePathName != wadfilepath)
+				{
+					DataLocation wdl = new DataLocation(DataLocation.RESOURCE_WAD, wadfilepath, false, false, true);
+					wads.Add(new WADReader(wdl, isreadonly));
+				}
 			}
 		}
 

Source/Core/Editing/ClassicMode.cs

@@ -214,7 +214,7 @@ namespace CodeImp.DoomBuilder.Editing
 
 			// Determine new unprojected mouse coordinates
 			mousemappos = renderer2d.DisplayToMap(mousepos);
-			General.MainWindow.UpdateCoordinates(mousemappos);
+			General.MainWindow.UpdateCoordinates(mousemappos, true);
 		}
 
 		// This sets the view to be centered at x,y
@@ -511,7 +511,7 @@ namespace CodeImp.DoomBuilder.Editing
 			mousebuttons = MouseButtons.None;
 			
 			// Determine new unprojected mouse coordinates
-			General.MainWindow.UpdateCoordinates(mousemappos);
+			General.MainWindow.UpdateCoordinates(mousemappos, true);
 			
 			// Let the base class know
 			base.OnMouseLeave(e);
@@ -528,7 +528,7 @@ namespace CodeImp.DoomBuilder.Editing
 			mousebuttons = e.Button;
 			
 			// Update labels in main window
-			General.MainWindow.UpdateCoordinates(mousemappos);
+			General.MainWindow.UpdateCoordinates(mousemappos, true);
 			
 			// Holding a button?
 			if(e.Button != MouseButtons.None)

Source/Core/General/General.cs

@@ -2151,12 +2151,12 @@ namespace CodeImp.DoomBuilder
 				// Try getting exception details...
 				try
 				{
-					Exception ex = (Exception) e.ExceptionObject;
+					Exception ex = (Exception)e.ExceptionObject;
-					exceptionmsg = "Fatal Non-UI error occurred: " + ex.Message + "\n\nStack Trace:\n" + ex.StackTrace;
+					exceptionmsg = "Fatal Non-UI error:\n" + ex.Message + "\n\nStack Trace:\n" + ex.StackTrace;
 				}
 				catch(Exception exc)
 				{
-					exceptionmsg = "Failed to get initial exception details: " + exc.Message + "\n\nStack Trace:\n" + exc.StackTrace;
+					exceptionmsg = "Failed to get initial exception details:\n" + exc.Message + "\n\nStack Trace:\n" + exc.StackTrace;
 				}
 
 				// Try logging it...

Source/Core/Geometry/InterpolationTools.cs

@@ -13,7 +13,7 @@ namespace CodeImp.DoomBuilder.Geometry
 			EASE_OUT_SINE,
 		}
 
-		public static int Interpolate(float val1, float val2, float delta, Mode mode)
+		public static float Interpolate(float val1, float val2, float delta, Mode mode)
 		{
 			switch(mode)
 			{
@@ -26,44 +26,53 @@ namespace CodeImp.DoomBuilder.Geometry
 		}
 		
 		//Based on Robert Penner's original easing equations (http://www.robertpenner.com/easing/)
-		public static int Linear(float val1, float val2, float delta)
+		public static float Linear(float val1, float val2, float delta)
 		{
-			return (int)Math.Round(delta * val2 + (1.0f - delta) * val1);
+			return delta * val2 + (1.0f - delta) * val1;
 		}
 		
 		/**
 		 * Easing equation function for a sinusoidal (sin(t)) easing in: accelerating from zero velocity.
 		 */
-		public static int EaseInSine(float val1, float val2, float delta) 
+		public static float EaseInSine(float val1, float val2, float delta) 
 		{
 			float f_val1 = val1;
 			float f_val2 = val2 - f_val1;
-			return (int)Math.Round(-f_val2 * Math.Cos(delta * Angle2D.PIHALF) + f_val2 + f_val1);
+			return -f_val2 * (float)Math.Cos(delta * Angle2D.PIHALF) + f_val2 + f_val1;
 		}
 
 		/**
 		 * Easing equation function for a sinusoidal (sin(t)) easing out: decelerating from zero velocity.
 		 */
-		public static int EaseOutSine(float val1, float val2, float delta) 
+		public static float EaseOutSine(float val1, float val2, float delta) 
 		{
-			return (int)Math.Round((val2 - val1) * Math.Sin(delta * Angle2D.PIHALF) + val1);
+			return (val2 - val1) * (float)Math.Sin(delta * Angle2D.PIHALF) + val1;
 		}
 
 		/**
 		 * Easing equation function for a sinusoidal (sin(t)) easing in/out: acceleration until halfway, then deceleration.
 		 */
-		public static int EaseInOutSine(float val1, float val2, float delta)
+		public static float EaseInOutSine(float val1, float val2, float delta)
 		{
-			return (int)Math.Round(-(val2 - val1) / 2 * (float)(Math.Cos(Math.PI * delta) - 1) + val1);
+			return -(val2 - val1) / 2 * (float)(Math.Cos(Angle2D.PI * delta) - 1) + val1;
 		}
 
 		//mxd
 		public static int InterpolateColor(PixelColor c1, PixelColor c2, float delta)
 		{
 			float invdelta = 1.0f - delta;
-			byte r = (byte)(c1.r * delta + c2.r * invdelta);
+			byte r = (byte)(c1.r * invdelta + c2.r * delta);
-			byte g = (byte)(c1.g * delta + c2.g * invdelta);
+			byte g = (byte)(c1.g * invdelta + c2.g * delta);
-			byte b = (byte)(c1.b * delta + c2.b * invdelta);
+			byte b = (byte)(c1.b * invdelta + c2.b * delta);
+			return new PixelColor(255, r, g, b).ToInt();
+		}
+
+		//mxd
+		public static int InterpolateColor(PixelColor c1, PixelColor c2, float delta, Mode mode)
+		{
+			byte r = (byte)Math.Round(Interpolate(c1.r, c2.r, delta, mode));
+			byte g = (byte)Math.Round(Interpolate(c1.g, c2.g, delta, mode));
+			byte b = (byte)Math.Round(Interpolate(c1.b, c2.b, delta, mode));
 			return new PixelColor(255, r, g, b).ToInt();
 		}
 	}

Source/Core/Geometry/Tools.cs

@@ -2399,15 +2399,13 @@ namespace CodeImp.DoomBuilder.Geometry
 		}
 
 		//mxd
-		public static Color GetSectorFadeColor(Sector s)
+		public static PixelColor GetSectorFadeColor(Sector s)
 		{
-			if(s.Fields.ContainsKey("fadecolor")) return PixelColor.FromInt(s.Fields.GetValue("fadecolor", 0)).ToColor();
+			if(s.Fields.ContainsKey("fadecolor")) return PixelColor.FromInt(s.Fields.GetValue("fadecolor", 0));
 			if(General.Map.Data.MapInfo.HasOutsideFogColor && s.CeilTexture == General.Map.Config.SkyFlatName)
-			{
+				return PixelColor.FromColor(General.Map.Data.MapInfo.OutsideFogColor.ToColor());
-				return General.Map.Data.MapInfo.OutsideFogColor.ToColor();
+
-			}
+			return PixelColor.FromColor(General.Map.Data.MapInfo.HasFadeColor ? General.Map.Data.MapInfo.FadeColor.ToColor() : Color.Black);
- 
-			return (General.Map.Data.MapInfo.HasFadeColor ? General.Map.Data.MapInfo.FadeColor.ToColor() : Color.Black);
 		}
 
 		#endregion

Source/Core/Rendering/Renderer2D.cs

@@ -1458,7 +1458,7 @@ namespace CodeImp.DoomBuilder.Rendering
 							float sy = t.ScaleY * t.ActorScale.Height;
 							
 							Matrix modelscale = Matrix.Scaling(sx, sx, sy);
-							Matrix rotation = Matrix.RotationY(-t.RollRad) * Matrix.RotationX(-t.PitchRad) * Matrix.RotationZ(t.Angle);
+							Matrix rotation = Matrix.RotationY(-t.RollRad) * Matrix.RotationX(t.PitchRad) * Matrix.RotationZ(t.Angle);
 							Matrix position = Matrix.Translation(screenpos.x, screenpos.y, 0.0f);
 							Matrix world = General.Map.Data.ModeldefEntries[t.Type].Transform * modelscale * rotation * viewscale * position;
 

Source/Core/Rendering/Renderer3D.cs

@@ -1426,7 +1426,7 @@ namespace CodeImp.DoomBuilder.Rendering
 					float sy = t.Thing.ScaleY * t.Thing.ActorScale.Height;
 
 					Matrix modelscale = Matrix.Scaling(sx, sx, sy);
-					Matrix modelrotation = Matrix.RotationY(-t.Thing.RollRad) * Matrix.RotationX(-t.Thing.PitchRad) * Matrix.RotationZ(t.Thing.Angle);
+					Matrix modelrotation = Matrix.RotationY(-t.Thing.RollRad) * Matrix.RotationX(t.Thing.PitchRad) * Matrix.RotationZ(t.Thing.Angle);
 
 					world = General.Map.Data.ModeldefEntries[t.Thing.Type].Transform * modelscale * modelrotation * t.Position;
 					ApplyMatrices3D();
@@ -1525,7 +1525,7 @@ namespace CodeImp.DoomBuilder.Rendering
 				float sy = t.Thing.ScaleY * t.Thing.ActorScale.Height;
 
 				Matrix modelscale = Matrix.Scaling(sx, sx, sy);
-				Matrix modelrotation = Matrix.RotationY(-t.Thing.RollRad) * Matrix.RotationX(-t.Thing.PitchRad) * Matrix.RotationZ(t.Thing.Angle);
+				Matrix modelrotation = Matrix.RotationY(-t.Thing.RollRad) * Matrix.RotationX(t.Thing.PitchRad) * Matrix.RotationZ(t.Thing.Angle);
 
 				world = General.Map.Data.ModeldefEntries[t.Thing.Type].Transform * modelscale * modelrotation * t.Position;
 				ApplyMatrices3D();

Source/Core/VisualModes/VisualThing.cs

@@ -493,7 +493,7 @@ namespace CodeImp.DoomBuilder.VisualModes
 				if(Thing.IsDirectional)
 				{
 					Matrix transform = Matrix.Scaling(thing.Size, thing.Size, thing.Size)
-						* (Matrix.RotationY(-Thing.RollRad) * Matrix.RotationX(-Thing.PitchRad) * Matrix.RotationZ(Thing.Angle))
+						* (Matrix.RotationY(-Thing.RollRad) * Matrix.RotationX(Thing.PitchRad) * Matrix.RotationZ(Thing.Angle))
 						* (sizeless ? position : position * Matrix.Translation(0.0f, 0.0f, thingheight / 2f));
 
 					WorldVertex a0 = new WorldVertex(Vector3D.Transform(0.0f, 0.0f, 0.0f, transform)); //start

Source/Core/Windows/MainForm.cs

@@ -947,8 +947,12 @@ namespace CodeImp.DoomBuilder.Windows
 		}
 		
 		// This changes coordinates display
-		public void UpdateCoordinates(Vector2D coords)
+		public void UpdateCoordinates(Vector2D coords){ UpdateCoordinates(coords, false); } //mxd
+		public void UpdateCoordinates(Vector2D coords, bool snaptogrid)
 		{
+			//mxd
+			if(snaptogrid) coords = General.Map.Grid.SnappedToGrid(coords);
+			
 			// X position
 			xposlabel.Text = (float.IsNaN(coords.x) ? "--" : coords.x.ToString("####0"));
 

Source/Plugins/BuilderModes/ClassicModes/BridgeMode.cs

@@ -724,16 +724,16 @@ namespace CodeImp.DoomBuilder.BuilderModes.ClassicModes
 					return Math.Min(val1, val2);
 				
 				case BridgeInterpolationMode.LINEAR:
-					return InterpolationTools.Linear(val1, val2, delta);
+					return (int)Math.Round(InterpolationTools.Linear(val1, val2, delta));
 
 				case BridgeInterpolationMode.IN_SINE:
-					return InterpolationTools.EaseInSine(val1, val2, delta);
+					return (int)Math.Round(InterpolationTools.EaseInSine(val1, val2, delta));
 
 				case BridgeInterpolationMode.OUT_SINE:
-					return InterpolationTools.EaseOutSine(val1, val2, delta);
+					return (int)Math.Round(InterpolationTools.EaseOutSine(val1, val2, delta));
 
 				case BridgeInterpolationMode.IN_OUT_SINE:
-					return InterpolationTools.EaseInOutSine(val1, val2, delta);
+					return (int)Math.Round(InterpolationTools.EaseInOutSine(val1, val2, delta));
 
 				default:
 					throw new Exception("DrawBezierPathMode.IntepolateValue: \"" + mode + "\" mode is not supported!");

Source/Plugins/BuilderModes/ClassicModes/DrawEllipseMode.cs

@@ -112,8 +112,8 @@ namespace CodeImp.DoomBuilder.BuilderModes
 			Vector2D[] shape = new Vector2D[subdivisions + 1];
 
 			bool doBevel = false;
-			int hw = width / 2;
+			float hw = width / 2.0f;
-			int hh = height / 2;
+			float hh = height / 2.0f;
 
 			Vector2D center = new Vector2D(pStart.x + hw, pStart.y + hh);
 			float curAngle = angle;
@@ -121,16 +121,16 @@ namespace CodeImp.DoomBuilder.BuilderModes
 
 			for(int i = 0; i < subdivisions; i++) 
 			{
-				int px, py;
+				float px, py;
 				if(doBevel) 
 				{
-					px = (int)(center.x - (float)Math.Sin(curAngle) * (hw + currentbevelwidth));
+					px = (float)Math.Round(center.x - (float)Math.Sin(curAngle) * (hw + currentbevelwidth));
-					py = (int)(center.y - (float)Math.Cos(curAngle) * (hh + currentbevelwidth));
+					py = (float)Math.Round(center.y - (float)Math.Cos(curAngle) * (hh + currentbevelwidth));
 				} 
 				else 
 				{
-					px = (int)(center.x - (float)Math.Sin(curAngle) * hw);
+					px = (float)Math.Round(center.x - (float)Math.Sin(curAngle) * hw);
-					py = (int)(center.y - (float)Math.Cos(curAngle) * hh);
+					py = (float)Math.Round(center.y - (float)Math.Cos(curAngle) * hh);
 				}
 				doBevel = !doBevel;
 				shape[i] = new Vector2D(px, py);

Source/Plugins/BuilderModes/ClassicModes/DrawGridMode.cs

@@ -399,10 +399,10 @@ namespace CodeImp.DoomBuilder.BuilderModes
 			{
 				for(int h = 0; h < slicesV; h++) 
 				{
-					float left = InterpolationTools.Interpolate(s.x, e.x, (float)w / slicesH, horizontalinterpolation);
+					float left = (float)Math.Round(InterpolationTools.Interpolate(s.x, e.x, (float)w / slicesH, horizontalinterpolation));
-					float top = InterpolationTools.Interpolate(s.y, e.y, (float)h / slicesV, verticalinterpolation);
+					float top = (float)Math.Round(InterpolationTools.Interpolate(s.y, e.y, (float)h / slicesV, verticalinterpolation));
-					float right = InterpolationTools.Interpolate(s.x, e.x, (w + 1.0f) / slicesH, horizontalinterpolation);
+					float right = (float)Math.Round(InterpolationTools.Interpolate(s.x, e.x, (w + 1.0f) / slicesH, horizontalinterpolation));
-					float bottom = InterpolationTools.Interpolate(s.y, e.y, (h + 1.0f)/ slicesV, verticalinterpolation);
+					float bottom = (float)Math.Round(InterpolationTools.Interpolate(s.y, e.y, (h + 1.0f)/ slicesV, verticalinterpolation));
 					blocks[w, h] = RectangleF.FromLTRB(left, top, right, bottom);
 				}
 			}

Source/Plugins/BuilderModes/ClassicModes/LinedefsMode.cs

@@ -1795,7 +1795,7 @@ namespace CodeImp.DoomBuilder.BuilderModes
 				foreach(Linedef l in orderedselection) 
 				{
 					float u = index / (float)(orderedselection.Count - 1);
-					int b = InterpolationTools.Interpolate(startbrightness, endbrightness, u, interpolationmode);
+					int b = (int)Math.Round(InterpolationTools.Interpolate(startbrightness, endbrightness, u, interpolationmode));
 					if(SidedefHasVisibleParts(l.Front)) ApplySidedefBrighness(l.Front, b);
 					if(SidedefHasVisibleParts(l.Back)) ApplySidedefBrighness(l.Back, b);
 					index++;

Source/Plugins/BuilderModes/ClassicModes/SectorsMode.cs

@@ -1992,7 +1992,7 @@ namespace CodeImp.DoomBuilder.BuilderModes
 						{
 							s.Fields.BeforeFieldsChange();
 							float u = index / (float) (orderedselection.Count - 1);
-							float b = InterpolationTools.Interpolate(startbrightness, endbrightness, u, interpolationmode);
+							float b = (float)Math.Round(InterpolationTools.Interpolate(startbrightness, endbrightness, u, interpolationmode));
 
 							//absolute flag set?
 							if(s.Fields.GetValue(lightAbsKey, false)) 
@@ -2032,7 +2032,7 @@ namespace CodeImp.DoomBuilder.BuilderModes
 					foreach(Sector s in orderedselection) 
 					{
 						float u = index / (float)(orderedselection.Count - 1);
-						s.Brightness = InterpolationTools.Interpolate(start.Brightness, end.Brightness, u, interpolationmode); //mxd
+						s.Brightness = (int)Math.Round(InterpolationTools.Interpolate(start.Brightness, end.Brightness, u, interpolationmode)); //mxd
 						index++;
 					}
 				}
@@ -2058,16 +2058,16 @@ namespace CodeImp.DoomBuilder.BuilderModes
 			} 
 			else 
 			{
-				Color startColor, endColor;
+				PixelColor startcolor, endcolor;
 				if(key == "fadecolor")
 				{
-					startColor = Tools.GetSectorFadeColor(start);
+					startcolor = Tools.GetSectorFadeColor(start);
-					endColor = Tools.GetSectorFadeColor(end);
+					endcolor = Tools.GetSectorFadeColor(end);
 				}
 				else
 				{
-					startColor = PixelColor.FromInt(start.Fields.GetValue(key, defaultvalue)).ToColor();
+					startcolor = PixelColor.FromInt(start.Fields.GetValue(key, defaultvalue));
-					endColor = PixelColor.FromInt(end.Fields.GetValue(key, defaultvalue)).ToColor();
+					endcolor = PixelColor.FromInt(end.Fields.GetValue(key, defaultvalue));
 				}
 
 				// Go for all sectors in between first and last
@@ -2077,12 +2077,10 @@ namespace CodeImp.DoomBuilder.BuilderModes
 					if(index > 0 && index < orderedselection.Count - 1)
 					{
 						s.Fields.BeforeFieldsChange();
-						float u = index / (float) (orderedselection.Count - 1);
+						float u = index / (orderedselection.Count - 1.0f);
-						Color c = Color.FromArgb(0, General.Clamp(InterpolationTools.Interpolate(startColor.R, endColor.R, u, interpolationmode), 0, 255),
+						int c = InterpolationTools.InterpolateColor(startcolor, endcolor, u, interpolationmode);
-						                         General.Clamp(InterpolationTools.Interpolate(startColor.G, endColor.G, u, interpolationmode), 0, 255),
-						                         General.Clamp(InterpolationTools.Interpolate(startColor.B, endColor.B, u, interpolationmode), 0, 255));
 
-						UniFields.SetInteger(s.Fields, key, c.ToArgb(), defaultvalue);
+						UniFields.SetInteger(s.Fields, key, c, defaultvalue);
 						s.UpdateNeeded = true;
 					}
 					index++;
@@ -2111,7 +2109,7 @@ namespace CodeImp.DoomBuilder.BuilderModes
 				foreach(Sector s in orderedselection) 
 				{
 					float u = index / (float)(orderedselection.Count - 1);
-					s.FloorHeight = InterpolationTools.Interpolate(startlevel, endlevel, u, interpolationmode); //mxd
+					s.FloorHeight = (int)Math.Round(InterpolationTools.Interpolate(startlevel, endlevel, u, interpolationmode)); //mxd
 					index++;
 				}
 
@@ -2146,7 +2144,7 @@ namespace CodeImp.DoomBuilder.BuilderModes
 				foreach(Sector s in orderedselection) 
 				{
 					float u = (float)index / (orderedselection.Count - 1);
-					s.CeilHeight = InterpolationTools.Interpolate(startlevel, endlevel, u, interpolationmode);
+					s.CeilHeight = (int)Math.Round(InterpolationTools.Interpolate(startlevel, endlevel, u, interpolationmode));
 					index++;
 				}
 

Source/Plugins/BuilderModes/Interface/EditSelectionPanel.Designer.cs

@@ -58,6 +58,8 @@ namespace CodeImp.DoomBuilder.BuilderModes
 			this.abssizex = new CodeImp.DoomBuilder.Controls.ButtonsNumericTextbox();
 			this.label3 = new System.Windows.Forms.Label();
 			this.groupBox3 = new System.Windows.Forms.GroupBox();
+			this.heightmode = new System.Windows.Forms.ComboBox();
+			this.label10 = new System.Windows.Forms.Label();
 			this.label14 = new System.Windows.Forms.Label();
 			this.flipv = new System.Windows.Forms.Button();
 			this.fliph = new System.Windows.Forms.Button();
@@ -75,8 +77,6 @@ namespace CodeImp.DoomBuilder.BuilderModes
 			this.floortexall = new System.Windows.Forms.CheckBox();
 			this.floortexgroup = new System.Windows.Forms.GroupBox();
 			this.tooltip = new System.Windows.Forms.ToolTip(this.components);
-			this.label10 = new System.Windows.Forms.Label();
-			this.heightmode = new System.Windows.Forms.ComboBox();
 			this.groupBox1.SuspendLayout();
 			this.groupBox2.SuspendLayout();
 			this.groupBox3.SuspendLayout();
@@ -482,6 +482,33 @@ namespace CodeImp.DoomBuilder.BuilderModes
 			this.groupBox3.TabStop = false;
 			this.groupBox3.Text = "Transform:";
 			// 
+			// heightmode
+			// 
+			this.heightmode.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
+			this.heightmode.FormattingEnabled = true;
+			this.heightmode.Items.AddRange(new object[] {
+            "Don\'t adjust height",
+            "Adjust floor height",
+            "Adjust ceiling height",
+            "Adjust floor and ceiling heights"});
+			this.heightmode.Location = new System.Drawing.Point(58, 53);
+			this.heightmode.Name = "heightmode";
+			this.heightmode.Size = new System.Drawing.Size(171, 21);
+			this.heightmode.TabIndex = 29;
+			this.heightmode.SelectedIndexChanged += new System.EventHandler(this.heightmode_SelectedIndexChanged);
+			// 
+			// label10
+			// 
+			this.label10.AutoSize = true;
+			this.label10.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Underline, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
+			this.label10.ForeColor = System.Drawing.SystemColors.HotTrack;
+			this.label10.Location = new System.Drawing.Point(14, 56);
+			this.label10.Name = "label10";
+			this.label10.Size = new System.Drawing.Size(41, 13);
+			this.label10.TabIndex = 28;
+			this.label10.Text = "Height:";
+			this.tooltip.SetToolTip(this.label10, resources.GetString("label10.ToolTip"));
+			// 
 			// label14
 			// 
 			this.label14.AutoSize = true;
@@ -668,33 +695,6 @@ namespace CodeImp.DoomBuilder.BuilderModes
 			this.floortexgroup.TabStop = false;
 			this.floortexgroup.Text = "  ";
 			// 
-			// label10
-			// 
-			this.label10.AutoSize = true;
-			this.label10.Font = new System.Drawing.Font("Microsoft Sans Serif", 8.25F, System.Drawing.FontStyle.Underline, System.Drawing.GraphicsUnit.Point, ((byte)(204)));
-			this.label10.ForeColor = System.Drawing.SystemColors.HotTrack;
-			this.label10.Location = new System.Drawing.Point(14, 56);
-			this.label10.Name = "label10";
-			this.label10.Size = new System.Drawing.Size(41, 13);
-			this.label10.TabIndex = 28;
-			this.label10.Text = "Height:";
-			this.tooltip.SetToolTip(this.label10, resources.GetString("label10.ToolTip"));
-			// 
-			// heightmode
-			// 
-			this.heightmode.DropDownStyle = System.Windows.Forms.ComboBoxStyle.DropDownList;
-			this.heightmode.FormattingEnabled = true;
-			this.heightmode.Items.AddRange(new object[] {
-            "Don\'t adjust height",
-            "Adjust floor height",
-            "Adjust ceiling height",
-            "Adjust floor and ceiling heights"});
-			this.heightmode.Location = new System.Drawing.Point(58, 53);
-			this.heightmode.Name = "heightmode";
-			this.heightmode.Size = new System.Drawing.Size(171, 21);
-			this.heightmode.TabIndex = 29;
-			this.heightmode.SelectedIndexChanged += new System.EventHandler(this.heightmode_SelectedIndexChanged);
-			// 
 			// EditSelectionPanel
 			// 
 			this.AutoScaleDimensions = new System.Drawing.SizeF(96F, 96F);

Source/Plugins/BuilderModes/Interface/EditSelectionPanel.resx

@@ -125,9 +125,10 @@
 based on floor/ceiling heights difference between 
 sectors outside selected sectors.
 
-Applied only when selected sectors were inside a single 
+Applied only when selected sectors were surrounded 
-sector when the mode was enabled, and are inside a 
+by sectors with the same target height when the mode 
-single sector when the mode is applied.</value>
+was enabled, and are surrounded by sectors with the 
+same target height when the mode is applied.</value>
   </data>
   <metadata name="$this.Locked" type="System.Boolean, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089">
     <value>True</value>

Source/Plugins/BuilderModes/VisualModes/BaseVisualGeometrySidedef.cs

@@ -302,7 +302,7 @@ namespace CodeImp.DoomBuilder.BuilderModes
 				if(v.z > cgz)
 				{
 					float cz = data.Ceiling.plane.GetZ(v.x, v.y);
-					float delta = ((v.z - cgz) / (cz - cgz)) * 0.9f;
+					float delta = 1.0f - (((v.z - cgz) / (cz - cgz)) * 0.9f);
 					PixelColor vc = PixelColor.FromInt(v.c);
 					v.c = InterpolationTools.InterpolateColor(GetGlowColor(data.CeilingGlow, vc), vc, delta);
 				}
@@ -317,7 +317,7 @@ namespace CodeImp.DoomBuilder.BuilderModes
 				if(v.z < fgz)
 				{
 					float fz = data.Floor.plane.GetZ(v.x, v.y);
-					float delta = ((v.z - fz) / (fgz - fz)) * 0.9f;
+					float delta = 1.0f - (((v.z - fz) / (fgz - fz)) * 0.9f);
 					PixelColor vc = PixelColor.FromInt(v.c);
 					v.c = InterpolationTools.InterpolateColor(vc, GetGlowColor(data.FloorGlow, vc), delta);
 				}