things! incomplete though.

Source/Builder.csproj

@@ -51,6 +51,7 @@
     <Compile Include="Data\FlatImage.cs" />
     <Compile Include="Data\PatchNames.cs" />
     <Compile Include="Data\Playpal.cs" />
+    <Compile Include="Data\ResourceImage.cs" />
     <Compile Include="Data\SpriteImage.cs" />
     <Compile Include="Data\TextureImage.cs" />
     <Compile Include="Editing\EditMode.cs" />
@@ -177,6 +178,7 @@
     <Compile Include="Rendering\Renderer2D.cs" />
     <Compile Include="Rendering\Renderer3D.cs" />
     <Compile Include="Rendering\ShaderManager.cs" />
+    <Compile Include="Rendering\Things2DShader.cs" />
   </ItemGroup>
   <ItemGroup>
     <Reference Include="SlimDX, Version=1.0.2847.35002, Culture=neutral, processorArchitecture=x86" />
@@ -248,6 +250,8 @@
     </EmbeddedResource>
     <EmbeddedResource Include="Resources\Actions.cfg" />
     <EmbeddedResource Include="Resources\base2d.fx" />
+    <EmbeddedResource Include="Resources\Thing2D.png" />
+    <EmbeddedResource Include="Resources\things2d.fx" />
     <None Include="Resources\Splash2.png" />
   </ItemGroup>
 </Project>

Source/Data/ImageData.cs

@@ -26,6 +26,7 @@ using SlimDX.Direct3D9;
 using System.Drawing.Imaging;
 using CodeImp.DoomBuilder.Rendering;
 using CodeImp.DoomBuilder.IO;
+using System.IO;
 
 #endregion
 
@@ -149,7 +150,19 @@ namespace CodeImp.DoomBuilder.Data
 		// This creates the Direct3D texture
 		public void CreateTexture()
 		{
-			// TODO: Write to memory stream and read with Texture.FromStream
+			MemoryStream memstream;
+			
+			// Only do this when texture is not created yet
+			if(texture == null)
+			{
+				// Write to memory stream and read from memory
+				memstream = new MemoryStream();
+				bitmap.Save(memstream, ImageFormat.Bmp);
+				memstream.Seek(0, SeekOrigin.Begin);
+				texture = Texture.FromStream(General.Map.Graphics.Device, memstream, (int)memstream.Length, bitmap.Size.Width, bitmap.Size.Height, 0,
+					Usage.None, Format.Unknown, Pool.Managed, Filter.Box, Filter.Box, 0);
+				memstream.Dispose();
+			}
 		}
 		
 		// This destroys the Direct3D texture

Source/Data/ResourceImage.cs

@@ -0,0 +1,92 @@
+
+#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.Drawing;
+using System.Drawing.Imaging;
+using CodeImp.DoomBuilder.Rendering;
+using CodeImp.DoomBuilder.IO;
+using System.IO;
+
+#endregion
+
+namespace CodeImp.DoomBuilder.Data
+{
+	internal class ResourceImage : ImageData
+	{
+		#region ================== Constants
+
+		#endregion
+
+		#region ================== Variables
+
+		#endregion
+
+		#region ================== Properties
+
+		#endregion
+
+		#region ================== Constructor / Disposer
+
+		// Constructor
+		public ResourceImage(string resourcename)
+		{
+			// Initialize
+			SetName(resourcename);
+			
+			// We have no destructor
+			GC.SuppressFinalize(this);
+		}
+
+		// Diposer
+		public override void Dispose()
+		{
+			// Not already disposed?
+			if(!isdisposed)
+			{
+				// Clean up
+
+				// Done
+				base.Dispose();
+			}
+		}
+
+		#endregion
+
+		#region ================== Methods
+
+		// This loads the image
+		public override void LoadImage()
+		{
+			Stream bitmapdata;
+			
+			// Get resource from memory
+			bitmapdata = General.ThisAssembly.GetManifestResourceStream("CodeImp.DoomBuilder.Resources." + Name);
+			bitmap = (Bitmap)Image.FromStream(bitmapdata);
+			
+			// Pass on to base
+			base.LoadImage();
+		}
+		
+		#endregion
+	}
+}

Source/Editing/LinedefsMode.cs

@@ -102,14 +102,14 @@ namespace CodeImp.DoomBuilder.Editing
 			if(renderer.StartRendering(true))
 			{
 				// Render lines
-				renderer.RenderLinedefSet(General.Map.Map, General.Map.Map.Linedefs);
+				renderer.RenderLinedefSet(General.Map.Map.Linedefs);
 
 				// Render highlighted item
 				if(highlighted != null)
 					renderer.RenderLinedef(highlighted, General.Colors.Highlight);
 
 				// Render vertices
-				renderer.RenderVerticesSet(General.Map.Map, General.Map.Map.Vertices);
+				renderer.RenderVerticesSet(General.Map.Map.Vertices);
 
 				// Done
 				renderer.FinishRendering();

Source/Editing/SectorsMode.cs

@@ -100,8 +100,8 @@ namespace CodeImp.DoomBuilder.Editing
 			if(renderer.StartRendering(true))
 			{
 				// Render stuff
-				renderer.RenderLinedefSet(General.Map.Map, General.Map.Map.Linedefs);
-				renderer.RenderVerticesSet(General.Map.Map, General.Map.Map.Vertices);
+				renderer.RenderLinedefSet(General.Map.Map.Linedefs);
+				renderer.RenderVerticesSet(General.Map.Map.Vertices);
 
 				// Render highlighted item
 				if(highlighted != null)

Source/Editing/VerticesMode.cs

@@ -102,13 +102,16 @@ namespace CodeImp.DoomBuilder.Editing
 			if(renderer.StartRendering(true))
 			{
 				// Render stuff
-				renderer.RenderLinedefSet(General.Map.Map, General.Map.Map.Linedefs);
-				renderer.RenderVerticesSet(General.Map.Map, General.Map.Map.Vertices);
+				renderer.RenderLinedefSet(General.Map.Map.Linedefs);
+				renderer.RenderVerticesSet(General.Map.Map.Vertices);
 
 				// Render highlighted item
 				if(highlighted != null)
 					renderer.RenderVertex(highlighted, General.Colors.Highlight);
 				
+				// Render things
+				renderer.RenderThingSet(General.Map.Map.Things);
+				
 				// Done
 				renderer.FinishRendering();
 			}

Source/IO/DoomMapSetIO.cs

@@ -73,7 +73,10 @@ namespace CodeImp.DoomBuilder.IO
 
 			// Read things
 			ReadThings(map, firstindex);
-
+			
+			// Remove unused vertices
+			map.RemoveUnusedVertices();
+			
 			// Return result;
 			return map;
 		}

Source/Map/MapSet.cs

@@ -433,6 +433,21 @@ namespace CodeImp.DoomBuilder.Map
 			// TODO: Make this
 		}
 		
+		// This removes unused vertices
+		public void RemoveUnusedVertices()
+		{
+			LinkedListNode<Vertex> vn, vc;
+			
+			// Go for all vertices
+			vn = vertices.First;
+			while(vn != null)
+			{
+				vc = vn;
+				vn = vc.Next;
+				if(vc.Value.Linedefs.Count == 0) vertices.Remove(vc);
+			}
+		}
+
 		#endregion
 	}
 }

Source/Rendering/D3DGraphics.cs

@@ -88,10 +88,6 @@ namespace CodeImp.DoomBuilder.Rendering
 			// Create resources list
 			resources = new List<ID3DResource>();
 			
-			// Create renderers
-			renderer2d = new Renderer2D(this);
-			renderer3d = new Renderer3D(this);
-			
 			// We have no destructor
 			GC.SuppressFinalize(this);
 		}
@@ -121,6 +117,9 @@ namespace CodeImp.DoomBuilder.Rendering
 		// This completes initialization after the device has started or has been reset
 		private void SetupSettings()
 		{
+			int intvalue;
+			float floatvalue;
+			
 			// Setup renderstates
 			device.SetRenderState(RenderState.AntialiasedLineEnable, false);
 			device.SetRenderState(RenderState.Ambient, Color.White.ToArgb());
@@ -142,19 +141,25 @@ namespace CodeImp.DoomBuilder.Rendering
 			device.SetRenderState(RenderState.Clipping, true);
 			device.SetRenderState(RenderState.CullMode, Cull.None);
 
+			// Make LOD bias hack until SlimDX has a SetSamplerState overload that accepts a float
+			floatvalue = -0.99f;
+			unsafe { General.CopyMemory(&intvalue, &floatvalue, new UIntPtr(4)); }
+
 			// Sampler settings
 			device.SetSamplerState(0, SamplerState.MagFilter, TextureFilter.Linear);
 			device.SetSamplerState(0, SamplerState.MinFilter, TextureFilter.Linear);
 			device.SetSamplerState(0, SamplerState.MipFilter, TextureFilter.Linear);
-
+			device.SetSamplerState(0, SamplerState.MipMapLodBias, intvalue);
+			
 			// Texture addressing
 			device.SetSamplerState(0, SamplerState.AddressU, TextureAddress.Wrap);
 			device.SetSamplerState(0, SamplerState.AddressV, TextureAddress.Wrap);
 			device.SetSamplerState(0, SamplerState.AddressW, TextureAddress.Wrap);
 
 			// First texture stage
-			device.SetTextureStageState(0, TextureStage.ColorOperation, TextureOperation.SelectArg1);
+			device.SetTextureStageState(0, TextureStage.ColorOperation, TextureOperation.Modulate);
 			device.SetTextureStageState(0, TextureStage.ColorArg1, TextureArgument.Texture);
+			device.SetTextureStageState(0, TextureStage.ColorArg2, TextureArgument.TFactor);
 			device.SetTextureStageState(0, TextureStage.ResultArg, TextureArgument.Current);
 			device.SetTextureStageState(0, TextureStage.TexCoordIndex, 0);
 
@@ -162,9 +167,10 @@ namespace CodeImp.DoomBuilder.Rendering
 			device.SetTextureStageState(1, TextureStage.ColorOperation, TextureOperation.Disable);
 			
 			// First alpha stage
-			device.SetTextureStageState(0, TextureStage.AlphaOperation, TextureOperation.SelectArg1);
+			device.SetTextureStageState(0, TextureStage.AlphaOperation, TextureOperation.Modulate);
 			device.SetTextureStageState(0, TextureStage.AlphaArg1, TextureArgument.Texture);
-
+			device.SetTextureStageState(0, TextureStage.AlphaArg2, TextureArgument.TFactor);
+			
 			// No more further stages
 			device.SetTextureStageState(1, TextureStage.AlphaOperation, TextureOperation.Disable);
 			
@@ -236,10 +242,10 @@ namespace CodeImp.DoomBuilder.Rendering
 
 			// Add event to cancel resize event
 			//device.DeviceResizing += new CancelEventHandler(CancelResize);
-			
-			// Reset renderers
-			renderer2d.Reset();
-			renderer3d.Reset();
+
+			// Create renderers
+			renderer2d = new Renderer2D(this);
+			renderer3d = new Renderer3D(this);
 			
 			// Initialize settings
 			SetupSettings();

Source/Rendering/FlatVertex.cs

@@ -11,7 +11,7 @@ namespace CodeImp.DoomBuilder.Rendering
 	public struct FlatVertex
 	{
 		// Vertex format
-		public static readonly int Stride = 7 * 4;
+		public static readonly int Stride = 6 * 4;
 
 		// Members
 		public float x;

Source/Rendering/Renderer2D.cs

@@ -32,6 +32,7 @@ using SlimDX.Direct3D9;
 using SlimDX;
 using CodeImp.DoomBuilder.Geometry;
 using System.Drawing.Imaging;
+using CodeImp.DoomBuilder.Data;
 
 #endregion
 
@@ -43,17 +44,31 @@ namespace CodeImp.DoomBuilder.Rendering
 
 		private const byte DOUBLESIDED_LINE_ALPHA = 130;
 		private const float FSAA_BLEND_FACTOR = 0.6f;
+		private const float THING_ARROW_SIZE = 15f;
+		private const float THING_CIRCLE_SIZE = 10f;
+		private const int THING_BUFFER_STEP = 100;
 
 		#endregion
 
 		#region ================== Variables
 
-		// Rendering memory
+		// Rendering memory for lines and vertices
 		private Texture tex;
 		private int width, height;
 		private int pwidth, pheight;
 		private Plotter plotter;
-
+		private FlatVertex[] screenverts = new FlatVertex[4];
+		private LockedRect lockedrect;
+		
+		// Buffers for rendering things
+		private VertexBuffer thingsvertices;
+		private PixelColor[] thingcolors;
+		private int numthings;
+		private int maxthings;
+		
+		// Images
+		private ResourceImage thingtexture;
+		
 		// View settings (world coordinates)
 		private float scale;
 		private float scaleinv;
@@ -79,6 +94,12 @@ namespace CodeImp.DoomBuilder.Rendering
 		public Renderer2D(D3DGraphics graphics) : base(graphics)
 		{
 			// Initialize
+			thingtexture = new ResourceImage("Thing2D.png");
+			thingtexture.LoadImage();
+			thingtexture.CreateTexture();
+
+			// Create texture for rendering lines/vertices
+			CreateTexture();
 			
 			// We have no destructor
 			GC.SuppressFinalize(this);
@@ -93,6 +114,9 @@ namespace CodeImp.DoomBuilder.Rendering
 				// Clean up
 				if(tex != null) tex.Dispose();
 				tex = null;
+				if(thingsvertices != null) thingsvertices.Dispose();
+				thingsvertices = null;
+				thingtexture.Dispose();
 				
 				// Done
 				base.Dispose();
@@ -106,56 +130,61 @@ namespace CodeImp.DoomBuilder.Rendering
 		// This draws the image on screen
 		public void Present()
 		{
-			FlatVertex[] verts = new FlatVertex[4];
-
 			// Start drawing
 			if(graphics.StartRendering(General.Colors.Background.PixelColor.ToInt()))
 			{
-				// Left top
-				verts[0].x = -0.5f;
-				verts[0].y = -0.5f;
-				verts[0].w = 1f;
-				verts[0].u = 0f;
-				verts[0].v = 0f;
-
-				// Right top
-				verts[1].x = pwidth - 0.5f;
-				verts[1].y = -0.5f;
-				verts[1].w = 1f;
-				verts[1].u = 1f;
-				verts[1].v = 0f;
-
-				// Left bottom
-				verts[2].x = -0.5f;
-				verts[2].y = pheight - 0.5f;
-				verts[2].w = 1f;
-				verts[2].u = 0f;
-				verts[2].v = 1f;
-
-				// Right bottom
-				verts[3].x = pwidth - 0.5f;
-				verts[3].y = pheight - 0.5f;
-				verts[3].w = 1f;
-				verts[3].u = 1f;
-				verts[3].v = 1f;
-				
-				// Set renderstates AND shader settings
+				// Set renderstates
 				graphics.Device.SetTexture(0, tex);
 				graphics.Device.SetRenderState(RenderState.CullMode, Cull.None);
 				graphics.Device.SetRenderState(RenderState.AlphaBlendEnable, true);
 				graphics.Device.SetRenderState(RenderState.SourceBlend, Blend.SourceAlpha);
 				graphics.Device.SetRenderState(RenderState.DestBlend, Blend.InvSourceAlpha);
+				graphics.Device.SetRenderState(RenderState.TextureFactor, -1);
 				graphics.Shaders.Base2D.Texture1 = tex;
 				graphics.Shaders.Base2D.SetSettings(1f / pwidth, 1f / pheight, FSAA_BLEND_FACTOR);
 				
-				// Draw
+				// Draw the lines and vertices texture
 				graphics.Shaders.Base2D.Begin();
 				graphics.Shaders.Base2D.BeginPass(0);
-				try { graphics.Device.DrawUserPrimitives<FlatVertex>(PrimitiveType.TriangleStrip, 0, 2, verts); }
-				catch(Exception) { }
+				try { graphics.Device.DrawUserPrimitives<FlatVertex>(PrimitiveType.TriangleStrip, 0, 2, screenverts); } catch(Exception) { }
 				graphics.Shaders.Base2D.EndPass();
 				graphics.Shaders.Base2D.End();
 
+				// Do we have things to render?
+				if((numthings > 0) && (thingsvertices != null))
+				{
+					// Set renderstates
+					graphics.Device.SetRenderState(RenderState.CullMode, Cull.None);
+					graphics.Device.SetRenderState(RenderState.AlphaBlendEnable, true);
+					graphics.Device.SetRenderState(RenderState.SourceBlend, Blend.SourceAlpha);
+					graphics.Device.SetRenderState(RenderState.DestBlend, Blend.InvSourceAlpha);
+					graphics.Device.SetTexture(0, thingtexture.Texture);
+					graphics.Shaders.Things2D.Texture1 = thingtexture.Texture;
+					
+					// Set the vertex buffer
+					graphics.Device.SetStreamSource(0, thingsvertices, 0, FlatVertex.Stride);
+					
+					// Go for all things
+					for(int i = 0; i < numthings; i++)
+					{
+						// Set renderstates
+						graphics.Device.SetRenderState(RenderState.TextureFactor, thingcolors[i].ToInt());
+						graphics.Shaders.Things2D.SetColors(thingcolors[i]);
+						
+						// Draw the thing circle
+						graphics.Shaders.Things2D.Begin();
+						graphics.Shaders.Things2D.BeginPass(0);
+						try { graphics.Device.DrawPrimitives(PrimitiveType.TriangleStrip, i * 8, 2); } catch(Exception) { }
+						graphics.Shaders.Things2D.EndPass();
+						
+						// Draw the thing icon
+						graphics.Shaders.Things2D.BeginPass(1);
+						try { graphics.Device.DrawPrimitives(PrimitiveType.TriangleStrip, i * 8 + 4, 2); } catch(Exception) { }
+						graphics.Shaders.Things2D.EndPass();
+						graphics.Shaders.Things2D.End();
+					}
+				}
+				
 				// Done
 				graphics.FinishRendering();
 			}
@@ -168,6 +197,12 @@ namespace CodeImp.DoomBuilder.Rendering
 			// Trash old texture
 			if(tex != null) tex.Dispose();
 			tex = null;
+
+			// Trash things buffer
+			if(thingsvertices != null) thingsvertices.Dispose();
+			thingsvertices = null;
+			maxthings = 0;
+			numthings = 0;
 		}
 		
 		// This is called resets when the device is reset
@@ -205,13 +240,34 @@ namespace CodeImp.DoomBuilder.Rendering
 			sd = tex.GetLevelDescription(0);
 			pwidth = sd.Width;
 			pheight = sd.Height;
+
+			// Setup screen vertices
+			screenverts[0].x = 0.5f;
+			screenverts[0].y = 0.5f;
+			screenverts[0].w = 1f;
+			screenverts[0].u = 1f / pwidth;
+			screenverts[0].v = 1f / pheight;
+			screenverts[1].x = pwidth - 1.5f;
+			screenverts[1].y = 0.5f;
+			screenverts[1].w = 1f;
+			screenverts[1].u = 1f - 1f / pwidth;
+			screenverts[1].v = 1f / pheight;
+			screenverts[2].x = 0.5f;
+			screenverts[2].y = pheight - 1.5f;
+			screenverts[2].w = 1f;
+			screenverts[2].u = 1f / pwidth;
+			screenverts[2].v = 1f - 1f / pheight;
+			screenverts[3].x = pwidth - 1.5f;
+			screenverts[3].y = pheight - 1.5f;
+			screenverts[3].w = 1f;
+			screenverts[3].u = 1f - 1f / pwidth;
+			screenverts[3].v = 1f - 1f / pheight;
 		}
 
 		// This begins a drawing session
 		public unsafe bool StartRendering(bool cleardisplay)
 		{
 			LockFlags lockflags;
-			LockedRect rect;
 			
 			// Do we have a texture?
 			if(tex != null)
@@ -221,12 +277,15 @@ namespace CodeImp.DoomBuilder.Rendering
 							else lockflags = LockFlags.NoSystemLock;
 
 				// Lock memory
-				rect = tex.LockRectangle(0, lockflags);
+				lockedrect = tex.LockRectangle(0, lockflags);
 
 				// Create plotter
-				plotter = new Plotter((PixelColor*)rect.Data.DataPointer.ToPointer(), rect.Pitch / sizeof(PixelColor), pheight, width, height);
+				plotter = new Plotter((PixelColor*)lockedrect.Data.DataPointer.ToPointer(), lockedrect.Pitch / sizeof(PixelColor), pheight, width, height);
 				if(cleardisplay) plotter.Clear();
 				
+				// Reset things buffer when display is cleared
+				if(cleardisplay) ReserveThingsMemory(0, false);
+				
 				// Ready for rendering
 				return true;
 			}
@@ -242,7 +301,8 @@ namespace CodeImp.DoomBuilder.Rendering
 		{
 			// Unlock memory
 			tex.UnlockRectangle(0);
-
+			lockedrect.Data.Dispose();
+			
 			// Present new image
 			Present();
 		}
@@ -287,8 +347,128 @@ namespace CodeImp.DoomBuilder.Rendering
 
 		#endregion
 
+		#region ================== Things
+
+		// This ensures there is enough place in the things buffer
+		private void ReserveThingsMemory(int newnumthings, bool preserve)
+		{
+			int newmaxthings;
+			DataStream stream;
+			FlatVertex[] verts = null;
+			PixelColor[] oldcolors = null;
+			
+			// Do we need to resize the buffer?
+			if((newnumthings > maxthings) || !preserve)
+			{
+				// Calculate new size
+				newmaxthings = newnumthings + THING_BUFFER_STEP;
+
+				// Read old things data if we want to keep it
+				if(preserve && (thingsvertices != null) && (numthings > 0))
+				{
+					stream = thingsvertices.Lock(0, numthings * 8 * FlatVertex.Stride, LockFlags.ReadOnly);
+					verts = stream.ReadRange<FlatVertex>(numthings * 8);
+					thingsvertices.Unlock();
+					stream.Dispose();
+					thingsvertices.Dispose();
+					oldcolors = thingcolors;
+				}
+				
+				// Create new buffer
+				thingsvertices = new VertexBuffer(graphics.Device, newmaxthings * 8 * FlatVertex.Stride, Usage.Dynamic, VertexFormat.None, Pool.Default);
+				thingcolors = new PixelColor[newmaxthings];
+				maxthings = newmaxthings;
+				
+				// Keep old things?
+				if(preserve && (verts != null))
+				{
+					// Write old things into new buffer
+					stream = thingsvertices.Lock(0, maxthings * 8 * FlatVertex.Stride, LockFlags.Discard);
+					stream.WriteRange<FlatVertex>(verts);
+					thingsvertices.Unlock();
+					stream.Dispose();
+					oldcolors.CopyTo(thingcolors, 0);
+				}
+				else
+				{
+					// Things were trashed
+					numthings = 0;
+				}
+			}
+		}
+
+		// This makes vertices for a thing
+		private void CreateThingVerts(Thing t, ref FlatVertex[] verts, int offset)
+		{
+			// Transform to screen coordinates
+			Vector2D screenpos = ((Vector2D)t.Position).GetTransformed(translatex, translatey, scale, -scale);
+			
+			// Setup fixed rect for circle
+			verts[offset].x = screenpos.x - THING_CIRCLE_SIZE;
+			verts[offset].y = screenpos.y - THING_CIRCLE_SIZE;
+			verts[offset].w = 1f;
+			verts[offset].u = 1f / 512f;
+			verts[offset].v = 1f / 128f;
+			offset++;
+			verts[offset].x = screenpos.x + THING_CIRCLE_SIZE;
+			verts[offset].y = screenpos.y - THING_CIRCLE_SIZE;
+			verts[offset].w = 1f;
+			verts[offset].u = 0.25f - 1f / 512f;
+			verts[offset].v = 1f / 128f;
+			offset++;
+			verts[offset].x = screenpos.x - THING_CIRCLE_SIZE;
+			verts[offset].y = screenpos.y + THING_CIRCLE_SIZE;
+			verts[offset].w = 1f;
+			verts[offset].u = 1f / 512f;
+			verts[offset].v = 1f - 1f / 128f;
+			offset++;
+			verts[offset].x = screenpos.x + THING_CIRCLE_SIZE;
+			verts[offset].y = screenpos.y + THING_CIRCLE_SIZE;
+			verts[offset].w = 1f;
+			verts[offset].u = 0.25f - 1f / 512f;
+			verts[offset].v = 1f - 1f / 128f;
+			offset++;
+			
+			// Setup rotated rect for arrow
+			verts[offset].x = screenpos.x + (float)Math.Sin(t.Angle - Angle2D.PI * 0.25f) * THING_ARROW_SIZE;
+			verts[offset].y = screenpos.y + (float)Math.Cos(t.Angle - Angle2D.PI * 0.25f) * THING_ARROW_SIZE;
+			verts[offset].w = 1f;
+			verts[offset].u = 0.50f;
+			verts[offset].v = 0f;
+			offset++;
+			verts[offset].x = screenpos.x + (float)Math.Sin(t.Angle + Angle2D.PI * 0.25f) * THING_ARROW_SIZE;
+			verts[offset].y = screenpos.y + (float)Math.Cos(t.Angle + Angle2D.PI * 0.25f) * THING_ARROW_SIZE;
+			verts[offset].w = 1f;
+			verts[offset].u = 0.75f;
+			verts[offset].v = 0f;
+			offset++;
+			verts[offset].x = screenpos.x + (float)Math.Sin(t.Angle - Angle2D.PI * 0.75f) * THING_ARROW_SIZE;
+			verts[offset].y = screenpos.y + (float)Math.Cos(t.Angle - Angle2D.PI * 0.75f) * THING_ARROW_SIZE;
+			verts[offset].w = 1f;
+			verts[offset].u = 0.50f;
+			verts[offset].v = 1f;
+			offset++;
+			verts[offset].x = screenpos.x + (float)Math.Sin(t.Angle + Angle2D.PI * 0.75f) * THING_ARROW_SIZE;
+			verts[offset].y = screenpos.y + (float)Math.Cos(t.Angle + Angle2D.PI * 0.75f) * THING_ARROW_SIZE;
+			verts[offset].w = 1f;
+			verts[offset].u = 0.75f;
+			verts[offset].v = 1f;
+		}
+		
+		#endregion
+
 		#region ================== Colors
 
+		// This returns the color for a thing
+		public PixelColor DetermineThingColor(Thing t)
+		{
+			// Determine color
+			if(t.Selected > 0) return General.Colors.Selection;
+			else return PixelColor.FromColor(Color.Tomato);
+
+			// TODO: Check against game configuration or embed color into thing
+		}
+
 		// This returns the color for a vertex
 		public PixelColor DetermineVertexColor(Vertex v)
 		{
@@ -323,6 +503,68 @@ namespace CodeImp.DoomBuilder.Rendering
 
 		#region ================== Map Rendering
 
+		// This adds a thing in the things buffer for rendering
+		public void RenderThing(Thing t, PixelColor c)
+		{
+			FlatVertex[] verts = new FlatVertex[8];
+			DataStream stream;
+
+			// TODO: Check if the thing is actually on screen
+
+			// Make sure there is enough memory reserved
+			ReserveThingsMemory(numthings + 1, true);
+
+			// Store the thing color
+			thingcolors[numthings] = c;
+
+			// Store vertices in buffer
+			stream = thingsvertices.Lock(numthings * 8 * FlatVertex.Stride, 8 * FlatVertex.Stride, LockFlags.NoSystemLock);
+			CreateThingVerts(t, ref verts, 0);
+			stream.WriteRange<FlatVertex>(verts);
+			thingsvertices.Unlock();
+			stream.Dispose();
+
+			// Thing added!
+			numthings++;
+		}
+
+		// This adds a thing in the things buffer for rendering
+		public void RenderThingSet(ICollection<Thing> things)
+		{
+			FlatVertex[] verts = new FlatVertex[things.Count * 8];
+			DataStream stream;
+			int offset = 0;
+			int added = 0;
+			
+			// Make sure there is enough memory reserved
+			ReserveThingsMemory(numthings + things.Count, true);
+
+			// Go for all things
+			foreach(Thing t in things)
+			{
+				// TODO: Check if the thing is actually on screen
+				
+				// Store the thing color
+				thingcolors[numthings + offset] = DetermineThingColor(t);
+
+				// Create vertices
+				CreateThingVerts(t, ref verts, offset * 8);
+
+				// Next
+				added++;
+				offset++;
+			}
+			
+			// Store vertices in buffer
+			stream = thingsvertices.Lock(numthings * 8 * FlatVertex.Stride, things.Count * 8 * FlatVertex.Stride, LockFlags.NoSystemLock);
+			stream.WriteRange<FlatVertex>(verts);
+			thingsvertices.Unlock();
+			stream.Dispose();
+
+			// Things added!
+			numthings += added;
+		}
+		
 		// This renders the linedefs of a sector with special color
 		public void RenderSector(Sector s, PixelColor c)
 		{
@@ -374,7 +616,7 @@ namespace CodeImp.DoomBuilder.Rendering
 		}
 		
 		// This renders a set of linedefs
-		public void RenderLinedefSet(MapSet map, ICollection<Linedef> linedefs)
+		public void RenderLinedefSet(ICollection<Linedef> linedefs)
 		{
 			// Go for all linedefs
 			foreach(Linedef l in linedefs) RenderLinedef(l, DetermineLinedefColor(l));
@@ -391,7 +633,7 @@ namespace CodeImp.DoomBuilder.Rendering
 		}
 		
 		// This renders a set of vertices
-		public void RenderVerticesSet(MapSet map, ICollection<Vertex> vertices)
+		public void RenderVerticesSet(ICollection<Vertex> vertices)
 		{
 			// Go for all vertices
 			foreach(Vertex v in vertices) RenderVertex(v, DetermineVertexColor(v));

Source/Rendering/ShaderManager.cs

@@ -51,6 +51,7 @@ namespace CodeImp.DoomBuilder.Rendering
 		
 		// Shaders
 		private Base2DShader base2dshader;
+		private Things2DShader things2dshader;
 		
 		// Disposing
 		private bool isdisposed = false;
@@ -62,6 +63,7 @@ namespace CodeImp.DoomBuilder.Rendering
 		public bool Enabled { get { return useshaders; } }
 		public string ShaderTechnique { get { return shadertechnique; } }
 		public Base2DShader Base2D { get { return base2dshader; } }
+		public Things2DShader Things2D { get { return things2dshader; } }
 		public bool IsDisposed { get { return isdisposed; } }
 
 		#endregion
@@ -80,6 +82,7 @@ namespace CodeImp.DoomBuilder.Rendering
 			
 			// Initialize effects
 			base2dshader = new Base2DShader(this);
+			things2dshader = new Things2DShader(this);
 			
 			// We have no destructor
 			GC.SuppressFinalize(this);
@@ -93,6 +96,7 @@ namespace CodeImp.DoomBuilder.Rendering
 			{
 				// Clean up
 				base2dshader.Dispose();
+				things2dshader.Dispose();
 				
 				// Done
 				isdisposed = true;

Source/Rendering/Things2DShader.cs

@@ -0,0 +1,112 @@
+
+#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.Windows.Forms;
+using System.IO;
+using System.Reflection;
+using System.Drawing;
+using System.ComponentModel;
+using CodeImp.DoomBuilder.Map;
+using SlimDX.Direct3D;
+using SlimDX.Direct3D9;
+using SlimDX;
+using CodeImp.DoomBuilder.Geometry;
+using System.Drawing.Imaging;
+
+#endregion
+
+namespace CodeImp.DoomBuilder.Rendering
+{
+	internal sealed class Things2DShader : D3DShader
+	{
+		#region ================== Variables
+
+		// Property handlers
+		private EffectHandle texture1;
+		private EffectHandle thingcolor;
+
+		#endregion
+
+		#region ================== Properties
+
+		public Texture Texture1 { set { if(manager.Enabled) effect.SetValue(texture1, value); } }
+
+		#endregion
+
+		#region ================== Constructor / Disposer
+
+		// Constructor
+		public Things2DShader(ShaderManager manager) : base(manager)
+		{
+			// Load effect from file
+			effect = LoadEffect("things2d.fx");
+
+			// Get the property handlers from effect
+			if(effect != null)
+			{
+				texture1 = effect.GetParameter(null, "texture1");
+				thingcolor = effect.GetParameter(null, "thingcolor");
+			}
+
+			// Initialize world vertex declaration
+			VertexElement[] elements = new VertexElement[]
+			{
+				new VertexElement(0, 0, DeclarationType.Float4, DeclarationMethod.Default, DeclarationUsage.PositionTransformed, 0),
+				new VertexElement(0, 16, DeclarationType.Float2, DeclarationMethod.Default, DeclarationUsage.TextureCoordinate, 0),
+				VertexElement.VertexDeclarationEnd
+			};
+			vertexdecl = new VertexDeclaration(General.Map.Graphics.Device, elements);
+
+			// We have no destructor
+			GC.SuppressFinalize(this);
+		}
+
+		// Diposer
+		public override void Dispose()
+		{
+			// Not already disposed?
+			if(!isdisposed)
+			{
+				// Clean up
+				texture1.Dispose();
+				thingcolor.Dispose();
+
+				// Done
+				base.Dispose();
+			}
+		}
+
+		#endregion
+
+		#region ================== Methods
+
+		// This sets the settings
+		public void SetColors(PixelColor thing)
+		{
+			// Set settings
+			if(manager.Enabled) effect.SetValue(thingcolor, ColorValue.FromColor(Color.FromArgb(thing.ToInt())));
+		}
+
+		#endregion
+	}
+}

Source/Resources/base2d.fx

@@ -42,7 +42,7 @@ float4 addcolor(float4 c1, float4 c2)
 }
 
 // Pixel shader
-float4 ps20_main(PixelData pd) : COLOR
+float4 ps_main(PixelData pd) : COLOR
 {
 	// Take this pixel's color
 	float4 c = tex2D(texture1samp, pd.uv);
@@ -69,7 +69,7 @@ technique SM20
 	pass p0
 	{
 	    VertexShader = null;
-	    PixelShader = compile ps_2_0 ps20_main();
+	    PixelShader = compile ps_2_0 ps_main();
 		CullMode = None;
 	    ZEnable = false;
 	    AlphaBlendEnable = true;

Source/Resources/things2d.fx

@@ -0,0 +1,71 @@
+// Things 2D rendering shader
+// Copyright (c) 2007 Pascal vd Heiden, www.codeimp.com
+
+// Pixel input data
+struct PixelData
+{
+    float4 pos		: POSITION;
+    float2 uv		: TEXCOORD0;
+};
+
+// Colors
+float4 thingcolor;
+
+// Texture1 input
+texture texture1
+<
+    string UIName = "Texture1";
+    string ResourceType = "2D";
+>;
+
+// Texture sampler settings
+sampler2D texture1samp = sampler_state
+{
+    Texture = <texture1>;
+    MagFilter = Linear;
+    MinFilter = Linear;
+    MipFilter = Linear;
+	AddressU = Wrap;
+	AddressV = Wrap;
+	MipMapLodBias = -0.99f;
+};
+
+// Pixel shader for colored circle
+float4 ps_circle(PixelData pd) : COLOR
+{
+	float4 c = tex2D(texture1samp, pd.uv);
+	float4 s = tex2D(texture1samp, pd.uv + float2(0.25f, 0.0f));
+	return lerp(c * thingcolor, float4(s.rgb, c.a), s.a);
+}
+
+// Pixel shader for icon
+float4 ps_icon(PixelData pd) : COLOR
+{
+	return tex2D(texture1samp, pd.uv);
+}
+
+// Technique for shader model 2.0
+technique SM20
+{
+	pass p0
+	{
+	    VertexShader = null;
+	    PixelShader = compile ps_2_0 ps_circle();
+		CullMode = None;
+	    ZEnable = false;
+	    AlphaBlendEnable = true;
+	    SrcBlend = SrcAlpha;
+	    DestBlend = InvSrcAlpha;
+	}
+	
+	pass p1
+	{
+	    VertexShader = null;
+	    PixelShader = compile ps_2_0 ps_icon();
+		CullMode = None;
+	    ZEnable = false;
+	    AlphaBlendEnable = true;
+	    SrcBlend = SrcAlpha;
+	    DestBlend = InvSrcAlpha;
+	}
+}