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diff --git a/hammer/helperfactory.cpp b/hammer/helperfactory.cpp
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+++ b/hammer/helperfactory.cpp
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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: Implements a factory for entity helpers. When an entity is created,
+//			the helpers from its class definition in the FGD are each instantiated
+//			and added as children of the entity.
+//
+//=============================================================================
+
+#include "stdafx.h"
+#include "HelperFactory.h"
+#include "fgdlib/HelperInfo.h"
+#include "MapAlignedBox.h"
+#include "MapAnimator.h"
+#include "MapAxisHandle.h"
+#include "MapDecal.h"
+#include "MapFrustum.h"
+#include "MapKeyFrame.h"
+#include "MapLightCone.h"
+#include "MapLine.h"
+#include "MapSprite.h"
+#include "MapSphere.h"
+#include "MapStudioModel.h"
+#include "MapOverlay.h"
+#include "MapPointHandle.h"
+#include "MapQuadBounds.h"
+#include "MapLight.h"
+#include "MapSideList.h"
+#include "MapCylinder.h"
+#include "MapInstance.h"
+#include "mapsweptplayerhull.h"
+#include "DispShore.h"
+
+// memdbgon must be the last include file in a .cpp file!!!
+#include <tier0/memdbgon.h>
+
+typedef CMapClass *HELPERFACTORY(CHelperInfo *, CMapEntity *);
+
+
+typedef struct
+{
+	char *pszName;
+	HELPERFACTORY *pfnFactory;
+} HelperFactoryMap_t;
+
+
+static HelperFactoryMap_t HelperFactoryMap[] =
+{
+	"sprite", CMapSprite::CreateMapSprite,					// Sprite, gets its render mode from the SPR file, has a selection handle.
+	"iconsprite", CMapSprite::CreateMapSprite,				// Masked alpha sprite, no selection handle.
+	"studio", CMapStudioModel::CreateMapStudioModel,		// Studio model with an axial bounding box.
+	"studioprop", CMapStudioModel::CreateMapStudioModel,	// Studio model with an oriented bounding box.
+	"lightprop", CMapStudioModel::CreateMapStudioModel,		// Studio model with an oriented bounding box, reverses pitch.
+	"quadbounds", CMapQuadBounds::CreateQuadBounds,			// Extracts the verts from a quad face of a brush.
+	"animator", CMapAnimator::CreateMapAnimator,			// Previews the motion of a moving entity (keyframe follower).
+	"keyframe", CMapKeyFrame::CreateMapKeyFrame,			// Autonames when cloned and draws lines to the next keyframe.
+	"decal", CMapDecal::CreateMapDecal,						// Decal that automatically attaches to nearby faces.
+	"wirebox", CMapAlignedBox::Create,						// Wireframe box that can extract its mins & maxs.
+	"line", CMapLine::Create,								// Line drawn between any two entities.
+	"nodelink", CMapLine::Create,							// Line drawn between any two navigation nodes.
+	"lightcone", CMapLightCone::Create,						// Faceted cone showing light angles and falloff.
+	"frustum", CMapFrustum::Create,							// Wireframe frustum.
+	"sphere", CMapSphere::Create,							// Wireframe sphere indicating a radius.
+	"overlay", CMapOverlay::CreateMapOverlay,				// A decal with manipulatable vertices.
+	"light", CMapLight::CreateMapLight,						// Light source for lighting preview.
+	"sidelist", CMapSideList::CreateMapSideList,			// List of CMapFace pointers set by face ID.
+	"origin", CMapPointHandle::Create,						// Handle used to manipulate the origin of an entity.
+	"vecline", CMapPointHandle::Create,						// Handle used to manipulate another point that draws a line back to its parent entity.
+	"axis", CMapAxisHandle::Create,							// Handle used to manipulate the axis of an entity.
+	"cylinder", CMapCylinder::Create,						// Wireframe cylinder with separate radii at each end
+	"sweptplayerhull", CMapSweptPlayerHull::Create,			// A swept player sized hull between two points (ladders)
+	"overlay_transition", CMapOverlayTransition::Create,	// Notes!!	
+	"instance", CMapInstance::Create,						// A map instance used for rendering the sub-map
+};
+
+
+//-----------------------------------------------------------------------------
+// Purpose: Creates a helper from a helper info object.
+// Input  : pHelperInfo - holds information about the helper to be created and
+//				arguments to be passed to the helper when it is created.
+//			pParent - The entity that will be the helper's parent.
+// Output : Returns a pointer to the newly created helper.
+//-----------------------------------------------------------------------------
+CMapClass *CHelperFactory::CreateHelper(CHelperInfo *pHelperInfo, CMapEntity *pParent)
+{
+	//
+	// Look up the helper factory function in the factory function table.
+	//
+	for (int i = 0; i < sizeof(HelperFactoryMap) / sizeof(HelperFactoryMap[0]); i++)
+	{
+		//
+		// If the function was found in the table, create the helper and return it.
+		//
+		if (!stricmp(HelperFactoryMap[i].pszName, pHelperInfo->GetName()))
+		{
+			CMapClass *pHelper = HelperFactoryMap[i].pfnFactory(pHelperInfo, pParent);
+			return(pHelper);
+		}
+	}
+
+	return(NULL);
+}
+