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diff --git a/public/bspflags.h b/public/bspflags.h
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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $Workfile:     $
+// $Date:         $
+// $NoKeywords: $
+//=============================================================================//
+
+#ifndef BSPFLAGS_H
+#define BSPFLAGS_H
+
+#ifdef _WIN32
+#pragma once
+#endif
+
+// contents flags are seperate bits
+// a given brush can contribute multiple content bits
+// multiple brushes can be in a single leaf
+
+// these definitions also need to be in q_shared.h!
+
+// lower bits are stronger, and will eat weaker brushes completely
+#define	CONTENTS_EMPTY			0		// No contents
+
+#define	CONTENTS_SOLID			0x1		// an eye is never valid in a solid
+#define	CONTENTS_WINDOW			0x2		// translucent, but not watery (glass)
+#define	CONTENTS_AUX			0x4
+#define	CONTENTS_GRATE			0x8		// alpha-tested "grate" textures.  Bullets/sight pass through, but solids don't
+#define	CONTENTS_SLIME			0x10
+#define	CONTENTS_WATER			0x20
+#define	CONTENTS_BLOCKLOS		0x40	// block AI line of sight
+#define CONTENTS_OPAQUE			0x80	// things that cannot be seen through (may be non-solid though)
+#define	LAST_VISIBLE_CONTENTS	0x80
+
+#define ALL_VISIBLE_CONTENTS (LAST_VISIBLE_CONTENTS | (LAST_VISIBLE_CONTENTS-1))
+
+#define CONTENTS_TESTFOGVOLUME	0x100
+#define CONTENTS_UNUSED			0x200	
+
+// unused 
+// NOTE: If it's visible, grab from the top + update LAST_VISIBLE_CONTENTS
+// if not visible, then grab from the bottom.
+#define CONTENTS_UNUSED6		0x400
+
+#define CONTENTS_TEAM1			0x800	// per team contents used to differentiate collisions 
+#define CONTENTS_TEAM2			0x1000	// between players and objects on different teams
+
+// ignore CONTENTS_OPAQUE on surfaces that have SURF_NODRAW
+#define CONTENTS_IGNORE_NODRAW_OPAQUE	0x2000
+
+// hits entities which are MOVETYPE_PUSH (doors, plats, etc.)
+#define CONTENTS_MOVEABLE		0x4000
+
+// remaining contents are non-visible, and don't eat brushes
+#define	CONTENTS_AREAPORTAL		0x8000
+
+#define	CONTENTS_PLAYERCLIP		0x10000
+#define	CONTENTS_MONSTERCLIP	0x20000
+
+// currents can be added to any other contents, and may be mixed
+#define	CONTENTS_CURRENT_0		0x40000
+#define	CONTENTS_CURRENT_90		0x80000
+#define	CONTENTS_CURRENT_180	0x100000
+#define	CONTENTS_CURRENT_270	0x200000
+#define	CONTENTS_CURRENT_UP		0x400000
+#define	CONTENTS_CURRENT_DOWN	0x800000
+
+#define	CONTENTS_ORIGIN			0x1000000	// removed before bsping an entity
+
+#define	CONTENTS_MONSTER		0x2000000	// should never be on a brush, only in game
+#define	CONTENTS_DEBRIS			0x4000000
+#define	CONTENTS_DETAIL			0x8000000	// brushes to be added after vis leafs
+#define	CONTENTS_TRANSLUCENT	0x10000000	// auto set if any surface has trans
+#define	CONTENTS_LADDER			0x20000000
+#define CONTENTS_HITBOX			0x40000000	// use accurate hitboxes on trace
+
+
+// NOTE: These are stored in a short in the engine now.  Don't use more than 16 bits
+#define	SURF_LIGHT		0x0001		// value will hold the light strength
+#define	SURF_SKY2D		0x0002		// don't draw, indicates we should skylight + draw 2d sky but not draw the 3D skybox
+#define	SURF_SKY		0x0004		// don't draw, but add to skybox
+#define	SURF_WARP		0x0008		// turbulent water warp
+#define	SURF_TRANS		0x0010
+#define SURF_NOPORTAL	0x0020	// the surface can not have a portal placed on it
+#define	SURF_TRIGGER	0x0040	// FIXME: This is an xbox hack to work around elimination of trigger surfaces, which breaks occluders
+#define	SURF_NODRAW		0x0080	// don't bother referencing the texture
+
+#define	SURF_HINT		0x0100	// make a primary bsp splitter
+
+#define	SURF_SKIP		0x0200	// completely ignore, allowing non-closed brushes
+#define SURF_NOLIGHT	0x0400	// Don't calculate light
+#define SURF_BUMPLIGHT	0x0800	// calculate three lightmaps for the surface for bumpmapping
+#define SURF_NOSHADOWS	0x1000	// Don't receive shadows
+#define SURF_NODECALS	0x2000	// Don't receive decals
+#define SURF_NOCHOP		0x4000	// Don't subdivide patches on this surface 
+#define SURF_HITBOX		0x8000	// surface is part of a hitbox
+
+
+
+// -----------------------------------------------------
+// spatial content masks - used for spatial queries (traceline,etc.)
+// -----------------------------------------------------
+#define	MASK_ALL					(0xFFFFFFFF)
+// everything that is normally solid
+#define	MASK_SOLID					(CONTENTS_SOLID|CONTENTS_MOVEABLE|CONTENTS_WINDOW|CONTENTS_MONSTER|CONTENTS_GRATE)
+// everything that blocks player movement
+#define	MASK_PLAYERSOLID			(CONTENTS_SOLID|CONTENTS_MOVEABLE|CONTENTS_PLAYERCLIP|CONTENTS_WINDOW|CONTENTS_MONSTER|CONTENTS_GRATE)
+// blocks npc movement
+#define	MASK_NPCSOLID				(CONTENTS_SOLID|CONTENTS_MOVEABLE|CONTENTS_MONSTERCLIP|CONTENTS_WINDOW|CONTENTS_MONSTER|CONTENTS_GRATE)
+// water physics in these contents
+#define	MASK_WATER					(CONTENTS_WATER|CONTENTS_MOVEABLE|CONTENTS_SLIME)
+// everything that blocks lighting
+#define	MASK_OPAQUE					(CONTENTS_SOLID|CONTENTS_MOVEABLE|CONTENTS_OPAQUE)
+// everything that blocks lighting, but with monsters added.
+#define MASK_OPAQUE_AND_NPCS		(MASK_OPAQUE|CONTENTS_MONSTER)
+// everything that blocks line of sight for AI
+#define MASK_BLOCKLOS				(CONTENTS_SOLID|CONTENTS_MOVEABLE|CONTENTS_BLOCKLOS)
+// everything that blocks line of sight for AI plus NPCs
+#define MASK_BLOCKLOS_AND_NPCS		(MASK_BLOCKLOS|CONTENTS_MONSTER)
+// everything that blocks line of sight for players
+#define	MASK_VISIBLE					(MASK_OPAQUE|CONTENTS_IGNORE_NODRAW_OPAQUE)
+// everything that blocks line of sight for players, but with monsters added.
+#define MASK_VISIBLE_AND_NPCS		(MASK_OPAQUE_AND_NPCS|CONTENTS_IGNORE_NODRAW_OPAQUE)
+// bullets see these as solid
+#define	MASK_SHOT					(CONTENTS_SOLID|CONTENTS_MOVEABLE|CONTENTS_MONSTER|CONTENTS_WINDOW|CONTENTS_DEBRIS|CONTENTS_HITBOX)
+// non-raycasted weapons see this as solid (includes grates)
+#define MASK_SHOT_HULL				(CONTENTS_SOLID|CONTENTS_MOVEABLE|CONTENTS_MONSTER|CONTENTS_WINDOW|CONTENTS_DEBRIS|CONTENTS_GRATE)
+// hits solids (not grates) and passes through everything else
+#define MASK_SHOT_PORTAL			(CONTENTS_SOLID|CONTENTS_MOVEABLE|CONTENTS_WINDOW|CONTENTS_MONSTER)
+// everything normally solid, except monsters (world+brush only)
+#define MASK_SOLID_BRUSHONLY		(CONTENTS_SOLID|CONTENTS_MOVEABLE|CONTENTS_WINDOW|CONTENTS_GRATE)
+// everything normally solid for player movement, except monsters (world+brush only)
+#define MASK_PLAYERSOLID_BRUSHONLY	(CONTENTS_SOLID|CONTENTS_MOVEABLE|CONTENTS_WINDOW|CONTENTS_PLAYERCLIP|CONTENTS_GRATE)
+// everything normally solid for npc movement, except monsters (world+brush only)
+#define MASK_NPCSOLID_BRUSHONLY		(CONTENTS_SOLID|CONTENTS_MOVEABLE|CONTENTS_WINDOW|CONTENTS_MONSTERCLIP|CONTENTS_GRATE)
+// just the world, used for route rebuilding
+#define MASK_NPCWORLDSTATIC			(CONTENTS_SOLID|CONTENTS_WINDOW|CONTENTS_MONSTERCLIP|CONTENTS_GRATE)
+// These are things that can split areaportals
+#define MASK_SPLITAREAPORTAL		(CONTENTS_WATER|CONTENTS_SLIME)
+
+// UNDONE: This is untested, any moving water
+#define MASK_CURRENT				(CONTENTS_CURRENT_0|CONTENTS_CURRENT_90|CONTENTS_CURRENT_180|CONTENTS_CURRENT_270|CONTENTS_CURRENT_UP|CONTENTS_CURRENT_DOWN)
+
+// everything that blocks corpse movement
+// UNDONE: Not used yet / may be deleted
+#define	MASK_DEADSOLID				(CONTENTS_SOLID|CONTENTS_PLAYERCLIP|CONTENTS_WINDOW|CONTENTS_GRATE)
+
+#endif // BSPFLAGS_H