/**

  * vim: set ts=4 :

  * =============================================================================

  * SourceMod (C)2004-2008 AlliedModders LLC.  All rights reserved.

  * =============================================================================

  *

  * This file is part of the SourceMod/SourcePawn SDK.

  *

  * This program is free software; you can redistribute it and/or modify it under

  * the terms of the GNU General Public License, version 3.0, as published by the

  * Free Software Foundation.

  * 

  * This program is distributed in the hope that it will be useful, but WITHOUT

  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS

  * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more

  * details.

  *

  * You should have received a copy of the GNU General Public License along with

  * this program.  If not, see <http://www.gnu.org/licenses/>.

  *

  * As a special exception, AlliedModders LLC gives you permission to link the

  * code of this program (as well as its derivative works) to "Half-Life 2," the

  * "Source Engine," the "SourcePawn JIT," and any Game MODs that run on software

  * by the Valve Corporation.  You must obey the GNU General Public License in

  * all respects for all other code used.  Additionally, AlliedModders LLC grants

  * this exception to all derivative works.  AlliedModders LLC defines further

  * exceptions, found in LICENSE.txt (as of this writing, version JULY-31-2007),

  * or <http://www.sourcemod.net/license.php>.

  *

  * Version: $Id$

  */

 #if defined _sdktools_trace_included

  #endinput

 #endif

 #define _sdktools_trace_included

 #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_MIST			0x40

 #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_UNUSED5		0x200

 #define CONTENTS_UNUSED6		0x4000

 #define CONTENTS_TEAM1			0x800		/**< per team contents used to differentiate collisions. */

 #define CONTENTS_TEAM2			0x1000		/**< between players and objects on different teams. */

 #define CONTENTS_IGNORE_NODRAW_OPAQUE	0x2000		/**< ignore CONTENTS_OPAQUE on surfaces that have SURF_NODRAW. */

 #define CONTENTS_MOVEABLE		0x4000		/**< hits entities which are MOVETYPE_PUSH (doors, plats, etc) */

 #define	CONTENTS_AREAPORTAL		0x8000		/**< remaining contents are non-visible, and don't eat brushes. */

 #define	CONTENTS_PLAYERCLIP		0x10000

 #define	CONTENTS_MONSTERCLIP	0x20000

 /**

  * @section 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

 /**

  * @endsection

  */

 #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. */

 /**

  * @section Trace masks.

  */

 #define	MASK_ALL				(0xFFFFFFFF)

 #define	MASK_SOLID				(CONTENTS_SOLID|CONTENTS_MOVEABLE|CONTENTS_WINDOW|CONTENTS_MONSTER|CONTENTS_GRATE) 			/**< everything that is normally solid */

 #define	MASK_PLAYERSOLID		(CONTENTS_SOLID|CONTENTS_MOVEABLE|CONTENTS_PLAYERCLIP|CONTENTS_WINDOW|CONTENTS_MONSTER|CONTENTS_GRATE) 	/**< everything that blocks player movement */

 #define	MASK_NPCSOLID			(CONTENTS_SOLID|CONTENTS_MOVEABLE|CONTENTS_MONSTERCLIP|CONTENTS_WINDOW|CONTENTS_MONSTER|CONTENTS_GRATE) /**< blocks npc movement */

 #define	MASK_WATER				(CONTENTS_WATER|CONTENTS_MOVEABLE|CONTENTS_SLIME) 							/**< water physics in these contents */

 #define	MASK_OPAQUE				(CONTENTS_SOLID|CONTENTS_MOVEABLE|CONTENTS_OPAQUE) 							/**< everything that blocks line of sight for AI, lighting, etc */

 #define MASK_OPAQUE_AND_NPCS	(MASK_OPAQUE|CONTENTS_MONSTER)										/**< everything that blocks line of sight for AI, lighting, etc, but with monsters added. */

 #define	MASK_VISIBLE			(MASK_OPAQUE|CONTENTS_IGNORE_NODRAW_OPAQUE) 								/**< everything that blocks line of sight for players */

 #define MASK_VISIBLE_AND_NPCS	(MASK_OPAQUE_AND_NPCS|CONTENTS_IGNORE_NODRAW_OPAQUE) 							/**< everything that blocks line of sight for players, but with monsters added. */

 #define	MASK_SHOT				(CONTENTS_SOLID|CONTENTS_MOVEABLE|CONTENTS_MONSTER|CONTENTS_WINDOW|CONTENTS_DEBRIS|CONTENTS_HITBOX) 	/**< bullets see these as solid */

 #define MASK_SHOT_HULL			(CONTENTS_SOLID|CONTENTS_MOVEABLE|CONTENTS_MONSTER|CONTENTS_WINDOW|CONTENTS_DEBRIS|CONTENTS_GRATE) 	/**< non-raycasted weapons see this as solid (includes grates) */

 #define MASK_SHOT_PORTAL		(CONTENTS_SOLID|CONTENTS_MOVEABLE|CONTENTS_WINDOW) 							/**< hits solids (not grates) and passes through everything else */

 #define MASK_SOLID_BRUSHONLY	(CONTENTS_SOLID|CONTENTS_MOVEABLE|CONTENTS_WINDOW|CONTENTS_GRATE) 					/**< everything normally solid, except monsters (world+brush only) */

 #define MASK_PLAYERSOLID_BRUSHONLY	(CONTENTS_SOLID|CONTENTS_MOVEABLE|CONTENTS_WINDOW|CONTENTS_PLAYERCLIP|CONTENTS_GRATE) 			/**< everything normally solid for player movement, except monsters (world+brush only) */

 #define MASK_NPCSOLID_BRUSHONLY	(CONTENTS_SOLID|CONTENTS_MOVEABLE|CONTENTS_WINDOW|CONTENTS_MONSTERCLIP|CONTENTS_GRATE) 			/**< everything normally solid for npc movement, except monsters (world+brush only) */

 #define MASK_NPCWORLDSTATIC		(CONTENTS_SOLID|CONTENTS_WINDOW|CONTENTS_MONSTERCLIP|CONTENTS_GRATE) 					/**< just the world, used for route rebuilding */

 #define MASK_SPLITAREAPORTAL	(CONTENTS_WATER|CONTENTS_SLIME) 									/**< These are things that can split areaportals */

 /**

  * @endsection

  */

 enum RayType

 {

 	RayType_EndPoint,	/**< The trace ray will go from the start position to the end position. */

 	RayType_Infinite	/**< The trace ray will go from the start position to infinity using a direction vector. */

 };

 funcenum TraceEntityFilter

 {

 	/**

 	 * Called on entity filtering.

 	 *

 	 * @param entity		Entity index.

  	 * @param contentsMask	Contents Mask.

  	 * @return				True to allow the current entity to be hit, otherwise false.

  	 */

 	bool:public(entity, contentsMask),

 	/**

 	 * Called on entity filtering.

 	 *

 	 * @param entity		Entity index.

  	 * @param contentsMask	Contents Mask.

  	 * @param data			Data value, if used.

  	 * @return				True to allow the current entity to be hit, otherwise false.

  	 */

 	bool:public(entity, contentsMask, any:data),

 };

 /**

  * Get the contents mask and the entity index at the given position.

  *

  * @param pos			World position to test.

  * @param entindex		Entity index found at the given position (by reference).

  * @return				Contents mask.

  */

 native TR_GetPointContents(const Float:pos[3], &entindex=-1);

 /**

  * Get the point contents testing only the given entity index.

  *

  * @param entindex		Entity index to test.

  * @param pos			World position.

  * @return				Contents mask.

  */

 native TR_GetPointContentsEnt(entindex, const Float:pos[3]);

 /**

  * Starts up a new trace ray using a global trace result.

  *

  * @param pos			Starting position of the ray.

  * @param vec			Depending on RayType, it will be used as the ending point, or the direction angle.

  * @param flags			Trace flags.

  * @param rtype			Method to calculate the ray direction.

  * @noreturn

  */

 native TR_TraceRay(const Float:pos[3], const Float:vec[3], flags, RayType:rtype);

 /**

  * Starts up a new trace ray using a global trace result and a customized trace ray filter.

  *

  * Calling TR_TraceRayFilter or TR_TraceRayFilterEx from inside a filter function is 

  * currently not allowed and may not work.

  *

  * @param pos			Starting position of the ray.

  * @param vec			Depending on RayType, it will be used as the ending point, or the direction angle.

  * @param flags			Trace flags.

  * @param rtype			Method to calculate the ray direction.

  * @param filter		Function to use as a filter.

  * @param data			Arbitrary data value to pass through to the filter function.

  * @noreturn

  */

 native TR_TraceRayFilter(const Float:pos[3],

 						 const Float:vec[3],

 						 flags,

 						 RayType:rtype,

 						 TraceEntityFilter:filter,

 						 any:data=0);

 /**

  * Starts up a new trace ray using a new trace result.

  *

  * @param pos			Starting position of the ray.

  * @param vec			Depending on RayType, it will be used as the ending point, or the direction angle.

  * @param flags			Trace flags.

  * @param rtype			Method to calculate the ray direction.

  * @return				Ray trace handle, which must be closed via CloseHandle().

  */

 native Handle:TR_TraceRayEx(const Float:pos[3], const Float:vec[3], flags, RayType:rtype);

 /**

  * Starts up a new trace ray using a new trace result and a customized trace ray filter.

  *

  * Calling TR_TraceRayFilter or TR_TraceRayFilterEx from inside a filter function is 

  * currently not allowed and may not work.

  *

  * @param pos			Starting position of the ray.

  * @param vec			Depending on RayType, it will be used as the ending point, or the direction angle.

  * @param flags			Trace flags.

  * @param rtype			Method to calculate the ray direction.

  * @param filter		Function to use as a filter.

  * @param data			Arbitrary data value to pass through to the filter function.

  * @return				Ray trace handle, which must be closed via CloseHandle().

  */

 native Handle:TR_TraceRayFilterEx(const Float:pos[3], 

 								  const Float:vec[3],

 								  flags, 

 								  RayType:rtype, 

 								  TraceEntityFilter:filter,

 								  any:data=0);

 /**

  * Returns the time fraction from a trace result (1.0 means no collision).

  *

  * @param hndl			A trace Handle, or INVALID_HANDLE to use a global trace result.

  * @return				Time fraction value of the trace.

  * @error				Invalid Handle.

  */

 native Float:TR_GetFraction(Handle:hndl=INVALID_HANDLE);

 /**

  * Returns the collision position of a trace result.

  *

  * @param pos			Vector buffer to store data in.

  * @param hndl			A trace Handle, or INVALID_HANDLE to use a global trace result.

  * @noreturn

  * @error				Invalid Handle.

  */

 native TR_GetEndPosition(Float:pos[3], Handle:hndl=INVALID_HANDLE);

 /**

  * Returns the entity index that collided with the trace.

  *

  * @param hndl			A trace Handle, or INVALID_HANDLE to use a global trace result.

  * @return				Entity index or -1 for no collision.

  * @error				Invalid Handle.

  */

 native TR_GetEntityIndex(Handle:hndl=INVALID_HANDLE);

 /**

  * Returns if there was any kind of collision along the trace ray.

  *

  * @param hndl			A trace Handle, or INVALID_HANDLE to use a global trace result.

  * @return				True if any collision found, otherwise false.

  * @error				Invalid Handle.

  */

 native bool:TR_DidHit(Handle:hndl=INVALID_HANDLE);

 /**

  * Returns in which body hit group the trace collided if any.

  *

  * @param hndl			A trace Handle, or INVALID_HANDLE to use a global trace result.

  * @return				Body hit group.

  * @error				Invalid Handle.

  */

 native TR_GetHitGroup(Handle:hndl=INVALID_HANDLE);

 /**

  * Find the normal vector to the collison plane of a trace.

  *

  * @param hndl		A trace Handle, or INVALID_HANDLE to use a global trace result.

  * @param normal	Vector buffer to store the vector normal to the collision plane

  * @noreturn

  * @error			Invalid Handle

  */

 native TR_GetPlaneNormal(Handle:hndl, Float:normal[3]);