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diff --git a/hammer/mapquadbounds.h b/hammer/mapquadbounds.h
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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: A helper that measures the extents of the only non-NODRAW face of
+//			its only solid sibling. Writes the extents as four vector keyvalues:
+//
+//				lowerleft
+//				upperleft
+//				lowerright
+//				upperright
+//			
+//			ASSUMPTIONS:
+//
+//			1. Only one solid sibling.
+//			2. That solid only has one face with a texture other than "toolsnodraw".
+//
+// $NoKeywords: $
+//=============================================================================//
+
+#ifndef MAPQUADBOUNDS_H
+#define MAPQUADBOUNDS_H
+#pragma once
+
+#include "MapHelper.h"
+
+
+class CHelperInfo;
+class CRender3D;
+
+
+class CMapQuadBounds : public CMapHelper
+{
+	public:
+
+		DECLARE_MAPCLASS(CMapQuadBounds,CMapHelper)
+
+		//
+		// Factory for building from a list of string parameters.
+		//
+		static CMapClass *CreateQuadBounds(CHelperInfo *pInfo, CMapEntity *pParent);
+
+		//
+		// Construction/destruction:
+		//
+		CMapQuadBounds(void);
+		~CMapQuadBounds(void);
+
+		void PresaveWorld(void);
+
+		virtual CMapClass *Copy(bool bUpdateDependencies);
+		virtual CMapClass *CopyFrom(CMapClass *pFrom, bool bUpdateDependencies);
+
+		int SerializeRMF(std::fstream &File, BOOL bRMF) { return(0); }
+		int SerializeMAP(std::fstream &File, BOOL bRMF) { return(0); }
+
+		bool IsVisualElement(void) { return(false); } // Only visible when the parent entity is selected.
+		
+		const char* GetDescription() { return("Quad bounds helper"); }
+
+	protected:
+		Vector			m_vLowerLeft;
+		Vector			m_vUpperLeft;
+		Vector			m_vLowerRight;
+		Vector			m_vUpperRight;
+		int				m_nError;
+};
+
+#endif // MAPQUADBOUNDS_H