some fixes and additions with floating point vertices

Source/Builder.csproj

@@ -291,6 +291,7 @@
     <Compile Include="IO\DoomPictureReader.cs" />
     <Compile Include="IO\FileImageReader.cs" />
     <Compile Include="IO\IImageReader.cs" />
+    <Compile Include="IO\IMapSetIO.cs" />
     <Compile Include="IO\Lump.cs" />
     <Compile Include="IO\MapSetIO.cs" />
     <Compile Include="IO\UniversalMapSetIO.cs" />

Source/BuilderModes/ClassicModes/DragGeometryMode.cs

@@ -301,6 +301,9 @@ namespace CodeImp.DoomBuilder.BuilderModes.Editing
 				// Stitch geometry
 				if(snaptonearest) General.Map.Map.StitchGeometry();
 				
+				// Snap to map format accuracy
+				General.Map.Map.SnapAllToAccuracy();
+				
 				// Update cached values
 				General.Map.Map.Update();
 

Source/BuilderModes/ClassicModes/DrawGeometryMode.cs

@@ -332,6 +332,9 @@ namespace CodeImp.DoomBuilder.BuilderModes.Editing
 
 				// Make corrections for backward linedefs
 				MapSet.FlipBackwardLinedefs(newlines);
+
+				// Snap to map format accuracy
+				General.Map.Map.SnapAllToAccuracy();
 				
 				// Update cached values
 				map.Update();

Source/General/MapManager.cs

@@ -103,7 +103,7 @@ namespace CodeImp.DoomBuilder
 		public GameConfiguration Config { get { return config; } }
 		public GridSetup Grid { get { return grid; } }
 		public UndoManager UndoRedo { get { return undoredo; } }
-		public Type Type { get { return io.GetType(); } }
+		public IMapSetIO FormatInterface { get { return io; } }
 
 		#endregion
 

Source/IO/DoomMapSetIO.cs

@@ -47,6 +47,7 @@ namespace CodeImp.DoomBuilder.IO
 		#region ================== Properties
 
 		public override int MaxSidedefs { get { return 65534; } }
+		public override int VertexDecimals { get { return 0; } }
 		
 		#endregion
 

Source/IO/HexenMapSetIO.cs

@@ -47,6 +47,7 @@ namespace CodeImp.DoomBuilder.IO
 		#region ================== Properties
 
 		public override int MaxSidedefs { get { return 65534; } }
+		public override int VertexDecimals { get { return 0; } }
 		
 		#endregion
 

Source/IO/IMapSetIO.cs

@@ -0,0 +1,38 @@
+
+#region ================== Copyright (c) 2007 Pascal vd Heiden
+
+/*
+ * Copyright (c) 2007 Pascal vd Heiden, www.codeimp.com
+ * This program is released under GNU General Public License
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ */
+
+#endregion
+
+#region ================== Namespaces
+
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Globalization;
+using System.Text;
+using System.IO;
+using CodeImp.DoomBuilder.Map;
+using System.Reflection;
+using System.Diagnostics;
+
+#endregion
+
+namespace CodeImp.DoomBuilder.IO
+{
+	public interface IMapSetIO
+	{
+		int MaxSidedefs { get; }
+		int VertexDecimals { get; }
+	}
+}

Source/IO/MapSetIO.cs

@@ -30,7 +30,7 @@ using System.Diagnostics;
 
 namespace CodeImp.DoomBuilder.IO
 {
-	internal abstract class MapSetIO
+	internal abstract class MapSetIO : IMapSetIO
 	{
 		#region ================== Constants
 
@@ -49,13 +49,14 @@ namespace CodeImp.DoomBuilder.IO
 		#region ================== Properties
 
 		public abstract int MaxSidedefs { get; }
+		public abstract int VertexDecimals { get; }
 
 		#endregion
 
 		#region ================== Constructor / Disposer
 
 		// Constructor
-		public MapSetIO(WAD wad, MapManager manager)
+		internal MapSetIO(WAD wad, MapManager manager)
 		{
 			// Initialize
 			this.wad = wad;

Source/IO/UniversalMapSetIO.cs

@@ -48,6 +48,7 @@ namespace CodeImp.DoomBuilder.IO
 		#region ================== Properties
 
 		public override int MaxSidedefs { get { return int.MaxValue; } }
+		public override int VertexDecimals { get { return 3; } }
 
 		#endregion
 

Source/Map/MapSet.cs

@@ -1205,6 +1205,12 @@ namespace CodeImp.DoomBuilder.Map
 
 		#region ================== Tools
 
+		// This snaps all vertices to the map format accuracy
+		public void SnapAllToAccuracy()
+		{
+			foreach(Vertex v in vertices) v.SnapToAccuracy();
+		}
+		
 		// This returns the next unused tag number
 		public int GetNewTag()
 		{

Source/Map/Vertex.cs

@@ -194,19 +194,21 @@ namespace CodeImp.DoomBuilder.Map
 		public void Move(Vector2D newpos)
 		{
 			// Change position
-			this.Move((int)Math.Round(newpos.x), (int)Math.Round(newpos.y));
-		}
-
-		// This moves the vertex
-		public void Move(int newx, int newy)
-		{
-			// Change position
-			pos = new Vector2D(newx, newy);
+			pos = newpos;
 			
 			// Let all lines know they need an update
 			foreach(Linedef l in linedefs) l.NeedUpdate();
 		}
 
+		// This snaps the vertex to the map format accuracy
+		public void SnapToAccuracy()
+		{
+			// Round the coordinates
+			Vector2D newpos = new Vector2D((float)Math.Round(pos.x, General.Map.FormatInterface.VertexDecimals),
+										   (float)Math.Round(pos.y, General.Map.FormatInterface.VertexDecimals));
+			this.Move(newpos);
+		}
+
 		// This snaps the vertex to the grid
 		public void SnapToGrid()
 		{