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diff --git a/hammer/boundbox.h b/hammer/boundbox.h
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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: An axis aligned bounding box class.
+//
+// $NoKeywords: $
+//=============================================================================//
+
+#ifndef BOUNDBOX_H
+#define BOUNDBOX_H
+#ifdef _WIN32
+#pragma once
+#endif
+
+
+#include "mathlib/vector.h"
+
+
+class BoundBox
+{
+	public:
+
+		BoundBox(void);
+		BoundBox(const Vector &mins, const Vector &maxs);
+		
+		void ResetBounds(void);
+		inline void SetBounds(const Vector &mins, const Vector &maxs);
+
+		void UpdateBounds(const Vector& bmins, const Vector& bmaxs);
+		void UpdateBounds(const Vector& pt);
+		void UpdateBounds(const BoundBox *pBox);
+		void GetBoundsCenter(Vector& ptdest);
+		inline void GetBounds(Vector& Mins, Vector& Maxs);
+
+		virtual bool IsIntersectingBox(const Vector& pfMins, const Vector& pfMaxs) const;
+		bool IsInsideBox(const Vector& pfMins, const Vector& pfMaxs) const;
+		bool ContainsPoint(const Vector& pt) const;
+		bool IsValidBox(void) const;
+		void GetBoundsSize(Vector& size);
+		void SnapToGrid(int iGridSize);
+		void Rotate90(int axis);
+
+		Vector bmins;
+		Vector bmaxs;
+}; 
+
+
+//-----------------------------------------------------------------------------
+// Purpose: Gets the bounding box as two vectors, a min and a max.
+// Input  : Mins - Receives the box's minima.
+//			Maxs - Receives the box's maxima.
+//-----------------------------------------------------------------------------
+void BoundBox::GetBounds(Vector &Mins, Vector &Maxs)
+{
+	Mins = bmins;
+	Maxs = bmaxs;
+}
+
+
+//-----------------------------------------------------------------------------
+// Purpose: Sets the box outright, equivalent to ResetBounds + UpdateBounds.
+// Input  : mins - Minima to set.
+//			maxs - Maxima to set.
+//-----------------------------------------------------------------------------
+void BoundBox::SetBounds(const Vector &mins, const Vector &maxs)
+{
+	bmins = mins;
+	bmaxs = maxs;
+}
+
+
+#endif // BOUNDBOX_H