diff --git a/OysterPhysics3D/Collision/ICollideable.h b/OysterPhysics3D/Collision/ICollideable.h
index 1aa1a195..08b69596 100644
--- a/OysterPhysics3D/Collision/ICollideable.h
+++ b/OysterPhysics3D/Collision/ICollideable.h
@@ -4,46 +4,36 @@
 /////////////////////////////////////////////////////////////////////
 
 #pragma once
-#ifndef OYSTER_COLLISION_ICOLLIDEABLE_H
-#define OYSTER_COLLISION_ICOLLIDEABLE_H
+#ifndef OYSTER_COLLISION_3D_ICOLLIDEABLE_H
+#define OYSTER_COLLISION_3D_ICOLLIDEABLE_H
 
-namespace Oyster { namespace Collision
+namespace Oyster { namespace Collision3D /// Contains a collection of 3D shapes and intercollission algorithms.
 {
 	class ICollideable
 	{
 	public:
-		enum CollisionType
+		enum Type
 		{
-			Point,
-			Ray,
-			Sphere,
-			Plane,
-			Triangle,
-			BoxAxisAligned,
-			Box,
-			Frustrum,
-			Line
+			Type_undefined,
+			Type_universe,
+			Type_point,
+			Type_ray,
+			Type_sphere,
+			Type_plane,
+			Type_triangle,
+			Type_box_axis_aligned,
+			Type_box,
+			Type_frustrum,
+			Type_line
 		};
 
-		enum State
-		{
-			Missed = 0,
-			Contained,
-			Intersected
-		};
+		const Type type;
 
-		ICollideable( CollisionType _type ) : type(_type) {};
-
-		const CollisionType type;
-
-		virtual ICollideable* clone( ) const = 0;
+		ICollideable( Type type = Type_undefined );
 
+		virtual ICollideable* clone( ) const = 0; // TODO: use smart unique pointer here
 		virtual bool Intersects( const ICollideable *target ) const = 0;
-
 		virtual bool Contains( const ICollideable *target ) const = 0;
-
-		//Not supported returns 0;
-		virtual State Advanced( const ICollideable *target ) const = 0;
 	};
 } }
 #endif
\ No newline at end of file
diff --git a/OysterPhysics3D/OysterPhysics3D.vcxproj.filters b/OysterPhysics3D/OysterPhysics3D.vcxproj.filters
index b3a3e91d..d9cf01aa 100644
--- a/OysterPhysics3D/OysterPhysics3D.vcxproj.filters
+++ b/OysterPhysics3D/OysterPhysics3D.vcxproj.filters
@@ -13,69 +13,81 @@
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       <Extensions>rc;ico;cur;bmp;dlg;rc2;rct;bin;rgs;gif;jpg;jpeg;jpe;resx;tiff;tif;png;wav;mfcribbon-ms</Extensions>
     </Filter>
+    <Filter Include="Header Files\Collision">
+      <UniqueIdentifier>{810a1ae3-6c3b-430a-8ebb-4fc4a4478717}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="Source Files\Collision">
+      <UniqueIdentifier>{512d69ae-c260-4a23-b1ee-cbfbd19620a6}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="Header Files\Physics">
+      <UniqueIdentifier>{67d78b73-6ad3-439e-bfba-817f0268b958}</UniqueIdentifier>
+    </Filter>
+    <Filter Include="Source Files\Physics">
+      <UniqueIdentifier>{86be9383-5659-4e32-bf71-ec25a5f1c5ac}</UniqueIdentifier>
+    </Filter>
   </ItemGroup>
   <ItemGroup>
     <ClCompile Include="Collision\Box.cpp">
-      <Filter>Source Files</Filter>
+      <Filter>Source Files\Collision</Filter>
     </ClCompile>
     <ClCompile Include="Collision\BoxAxisAligned.cpp">
-      <Filter>Source Files</Filter>
+      <Filter>Source Files\Collision</Filter>
     </ClCompile>
     <ClCompile Include="Collision\Collision.cpp">
-      <Filter>Source Files</Filter>
+      <Filter>Source Files\Collision</Filter>
     </ClCompile>
     <ClCompile Include="Collision\Frustrum.cpp">
-      <Filter>Source Files</Filter>
+      <Filter>Source Files\Collision</Filter>
     </ClCompile>
     <ClCompile Include="Collision\Line.cpp">
-      <Filter>Source Files</Filter>
+      <Filter>Source Files\Collision</Filter>
     </ClCompile>
     <ClCompile Include="Collision\Plane.cpp">
-      <Filter>Source Files</Filter>
+      <Filter>Source Files\Collision</Filter>
     </ClCompile>
     <ClCompile Include="Collision\Point.cpp">
-      <Filter>Source Files</Filter>
+      <Filter>Source Files\Collision</Filter>
     </ClCompile>
     <ClCompile Include="Collision\Ray.cpp">
-      <Filter>Source Files</Filter>
+      <Filter>Source Files\Collision</Filter>
     </ClCompile>
     <ClCompile Include="Collision\Sphere.cpp">
-      <Filter>Source Files</Filter>
+      <Filter>Source Files\Collision</Filter>
     </ClCompile>
   </ItemGroup>
   <ItemGroup>
     <ClInclude Include="Collision\Box.h">
-      <Filter>Header Files</Filter>
+      <Filter>Header Files\Collision</Filter>
     </ClInclude>
     <ClInclude Include="Collision\BoxAxisAligned.h">
-      <Filter>Header Files</Filter>
+      <Filter>Header Files\Collision</Filter>
     </ClInclude>
     <ClInclude Include="Collision\Collision.h">
-      <Filter>Header Files</Filter>
+      <Filter>Header Files\Collision</Filter>
     </ClInclude>
     <ClInclude Include="Collision\Frustrum.h">
-      <Filter>Header Files</Filter>
+      <Filter>Header Files\Collision</Filter>
     </ClInclude>
     <ClInclude Include="Collision\ICollideable.h">
-      <Filter>Header Files</Filter>
+      <Filter>Header Files\Collision</Filter>
     </ClInclude>
     <ClInclude Include="Collision\Line.h">
-      <Filter>Header Files</Filter>
+      <Filter>Header Files\Collision</Filter>
     </ClInclude>
     <ClInclude Include="Collision\OysterCollision.h">
-      <Filter>Header Files</Filter>
+      <Filter>Header Files\Collision</Filter>
     </ClInclude>
     <ClInclude Include="Collision\Plane.h">
-      <Filter>Header Files</Filter>
+      <Filter>Header Files\Collision</Filter>
     </ClInclude>
     <ClInclude Include="Collision\Point.h">
-      <Filter>Header Files</Filter>
+      <Filter>Header Files\Collision</Filter>
     </ClInclude>
     <ClInclude Include="Collision\Ray.h">
-      <Filter>Header Files</Filter>
+      <Filter>Header Files\Collision</Filter>
     </ClInclude>
     <ClInclude Include="Collision\Sphere.h">
-      <Filter>Header Files</Filter>
+      <Filter>Header Files\Collision</Filter>
     </ClInclude>
   </ItemGroup>
 </Project>
\ No newline at end of file