/***
*
*	Copyright (c) 1996-2002, Valve LLC. All rights reserved.
*	
*	This product contains software technology licensed from Id 
*	Software, Inc. ("Id Technology").  Id Technology (c) 1996 Id Software, Inc. 
*	All Rights Reserved.
*
*   Use, distribution, and modification of this source code and/or resulting
*   object code is restricted to non-commercial enhancements to products from
*   Valve LLC.  All other use, distribution, or modification is prohibited
*   without written permission from Valve LLC.
*
****/

#include	"extdll.h"
#include	"util.h"
#include	"cbase.h"
#include	"saverestore.h"
#include	"client.h"
#include	"decals.h"
#include	"gamerules.h"
#include	"game.h"

void EntvarsKeyvalue( entvars_t *pev, KeyValueData *pkvd );

extern "C" void PM_Move ( struct playermove_s *ppmove, int server );
extern "C" void PM_Init ( struct playermove_s *ppmove  );
extern "C" char PM_FindTextureType( const char *name );

extern Vector VecBModelOrigin( entvars_t* pevBModel );
extern DLL_GLOBAL Vector g_vecAttackDir;
extern DLL_GLOBAL int g_iSkillLevel;

static DLL_FUNCTIONS gFunctionTable =
{
	GameDLLInit,				//pfnGameInit
	DispatchSpawn,				//pfnSpawn
	DispatchThink,				//pfnThink
	DispatchUse,				//pfnUse
	DispatchTouch,				//pfnTouch
	DispatchBlocked,			//pfnBlocked
	DispatchKeyValue,			//pfnKeyValue
	DispatchSave,				//pfnSave
	DispatchRestore,			//pfnRestore
	DispatchObjectCollsionBox,	//pfnAbsBox

	SaveWriteFields,			//pfnSaveWriteFields
	SaveReadFields,				//pfnSaveReadFields

	SaveGlobalState,			//pfnSaveGlobalState
	RestoreGlobalState,			//pfnRestoreGlobalState
	ResetGlobalState,			//pfnResetGlobalState

	ClientConnect,				//pfnClientConnect
	ClientDisconnect,			//pfnClientDisconnect
	ClientKill,					//pfnClientKill
	ClientPutInServer,			//pfnClientPutInServer
	ClientCommand,				//pfnClientCommand
	ClientUserInfoChanged,		//pfnClientUserInfoChanged
	ServerActivate,				//pfnServerActivate
	ServerDeactivate,			//pfnServerDeactivate

	PlayerPreThink,				//pfnPlayerPreThink
	PlayerPostThink,			//pfnPlayerPostThink

	StartFrame,					//pfnStartFrame
	ParmsNewLevel,				//pfnParmsNewLevel
	ParmsChangeLevel,			//pfnParmsChangeLevel

	GetGameDescription,         //pfnGetGameDescription    Returns string describing current .dll game.
	PlayerCustomization,        //pfnPlayerCustomization   Notifies .dll of new customization for player.

	SpectatorConnect,			//pfnSpectatorConnect      Called when spectator joins server
	SpectatorDisconnect,        //pfnSpectatorDisconnect   Called when spectator leaves the server
	SpectatorThink,				//pfnSpectatorThink        Called when spectator sends a command packet (usercmd_t)

	Sys_Error,					//pfnSys_Error				Called when engine has encountered an error

	PM_Move,					//pfnPM_Move
	PM_Init,					//pfnPM_Init				Server version of player movement initialization
	PM_FindTextureType,			//pfnPM_FindTextureType

	SetupVisibility,			//pfnSetupVisibility        Set up PVS and PAS for networking for this client
	UpdateClientData,			//pfnUpdateClientData       Set up data sent only to specific client
	AddToFullPack,				//pfnAddToFullPack
	CreateBaseline,				//pfnCreateBaseline			Tweak entity baseline for network encoding, allows setup of player baselines, too.
	RegisterEncoders,			//pfnRegisterEncoders		Callbacks for network encoding
	GetWeaponData,				//pfnGetWeaponData
	CmdStart,					//pfnCmdStart
	CmdEnd,						//pfnCmdEnd
	ConnectionlessPacket,		//pfnConnectionlessPacket
	GetHullBounds,				//pfnGetHullBounds
	CreateInstancedBaselines,   //pfnCreateInstancedBaselines
	InconsistentFile,			//pfnInconsistentFile
	AllowLagCompensation,		//pfnAllowLagCompensation
};

static void SetObjectCollisionBox( entvars_t *pev );

#ifndef _WIN32
extern "C" {
#endif
int GetEntityAPI( DLL_FUNCTIONS *pFunctionTable, int interfaceVersion )
{
	if( !pFunctionTable || interfaceVersion != INTERFACE_VERSION )
	{
		return FALSE;
	}
	
	memcpy( pFunctionTable, &gFunctionTable, sizeof(DLL_FUNCTIONS) );
	return TRUE;
}

int GetEntityAPI2( DLL_FUNCTIONS *pFunctionTable, int *interfaceVersion )
{
	if( !pFunctionTable || *interfaceVersion != INTERFACE_VERSION )
	{
		// Tell engine what version we had, so it can figure out who is out of date.
		*interfaceVersion = INTERFACE_VERSION;
		return FALSE;
	}

	memcpy( pFunctionTable, &gFunctionTable, sizeof(DLL_FUNCTIONS) );
	return TRUE;
}

#ifndef _WIN32
}
#endif

int DispatchSpawn( edict_t *pent )
{
	CBaseEntity *pEntity = (CBaseEntity *)GET_PRIVATE( pent );

	if( pEntity )
	{
		// Initialize these or entities who don't link to the world won't have anything in here
		pEntity->pev->absmin = pEntity->pev->origin - Vector( 1, 1, 1 );
		pEntity->pev->absmax = pEntity->pev->origin + Vector( 1, 1, 1 );

		pEntity->Spawn();

		// Try to get the pointer again, in case the spawn function deleted the entity.
		// UNDONE: Spawn() should really return a code to ask that the entity be deleted, but
		// that would touch too much code for me to do that right now.
		pEntity = (CBaseEntity *)GET_PRIVATE( pent );

		if( pEntity )
		{
			if( g_pGameRules && !g_pGameRules->IsAllowedToSpawn( pEntity ) )
				return -1;	// return that this entity should be deleted
			if( pEntity->pev->flags & FL_KILLME )
				return -1;
		}

		// Handle global stuff here
		if( pEntity && pEntity->pev->globalname ) 
		{
			const globalentity_t *pGlobal = gGlobalState.EntityFromTable( pEntity->pev->globalname );
			if( pGlobal )
			{
				// Already dead? delete
				if( pGlobal->state == GLOBAL_DEAD )
					return -1;
				else if( !FStrEq( STRING( gpGlobals->mapname ), pGlobal->levelName ) )
					pEntity->MakeDormant();	// Hasn't been moved to this level yet, wait but stay alive
				// In this level & not dead, continue on as normal
			}
			else
			{
				// Spawned entities default to 'On'
				gGlobalState.EntityAdd( pEntity->pev->globalname, gpGlobals->mapname, GLOBAL_ON );
				//ALERT( at_console, "Added global entity %s (%s)\n", STRING( pEntity->pev->classname ), STRING( pEntity->pev->globalname ) );
			}
		}

	}

	return 0;
}

void DispatchKeyValue( edict_t *pentKeyvalue, KeyValueData *pkvd )
{
	if( !pkvd || !pentKeyvalue )
		return;

	EntvarsKeyvalue( VARS( pentKeyvalue ), pkvd );

	// If the key was an entity variable, or there's no class set yet, don't look for the object, it may
	// not exist yet.
	if ( pkvd->fHandled || pkvd->szClassName == NULL )
		return;

	// Get the actualy entity object
	CBaseEntity *pEntity = (CBaseEntity *)GET_PRIVATE( pentKeyvalue );

	if( !pEntity )
		return;

	pEntity->KeyValue( pkvd );
}

// HACKHACK -- this is a hack to keep the node graph entity from "touching" things (like triggers)
// while it builds the graph
BOOL gTouchDisabled = FALSE;

void DispatchTouch( edict_t *pentTouched, edict_t *pentOther )
{
	if( gTouchDisabled )
		return;

	CBaseEntity *pEntity = (CBaseEntity *)GET_PRIVATE( pentTouched );
	CBaseEntity *pOther = (CBaseEntity *)GET_PRIVATE( pentOther );

	if( pEntity && pOther && ! ( ( pEntity->pev->flags | pOther->pev->flags ) & FL_KILLME ) )
		pEntity->Touch( pOther );
}

void DispatchUse( edict_t *pentUsed, edict_t *pentOther )
{
	CBaseEntity *pEntity = (CBaseEntity *)GET_PRIVATE( pentUsed );
	CBaseEntity *pOther = (CBaseEntity *)GET_PRIVATE( pentOther );

	if( pEntity && !( pEntity->pev->flags & FL_KILLME ) )
		pEntity->Use( pOther, pOther, USE_TOGGLE, 0 );
}

void DispatchThink( edict_t *pent )
{
	CBaseEntity *pEntity = (CBaseEntity *)GET_PRIVATE( pent );
	if( pEntity )
	{
		if( FBitSet( pEntity->pev->flags, FL_DORMANT ) )
			ALERT( at_error, "Dormant entity %s is thinking!!\n", STRING( pEntity->pev->classname ) );

		pEntity->Think();
	}
}

void DispatchBlocked( edict_t *pentBlocked, edict_t *pentOther )
{
	CBaseEntity *pEntity = (CBaseEntity *)GET_PRIVATE( pentBlocked );
	CBaseEntity *pOther = (CBaseEntity *)GET_PRIVATE( pentOther );

	if( pEntity )
		pEntity->Blocked( pOther );
}

void DispatchSave( edict_t *pent, SAVERESTOREDATA *pSaveData )
{
	CBaseEntity *pEntity = (CBaseEntity *)GET_PRIVATE( pent );

	if( pEntity && pSaveData )
	{
		ENTITYTABLE *pTable = &pSaveData->pTable[pSaveData->currentIndex];

		if( pTable->pent != pent )
			ALERT( at_error, "ENTITY TABLE OR INDEX IS WRONG!!!!\n" );

		if( pEntity->ObjectCaps() & FCAP_DONT_SAVE )
			return;

		// These don't use ltime & nextthink as times really, but we'll fudge around it.
		if( pEntity->pev->movetype == MOVETYPE_PUSH )
		{
			float delta = pEntity->pev->nextthink - pEntity->pev->ltime;
			pEntity->pev->ltime = gpGlobals->time;
			pEntity->pev->nextthink = pEntity->pev->ltime + delta;
		}

		pTable->location = pSaveData->size;		// Remember entity position for file I/O
		pTable->classname = pEntity->pev->classname;	// Remember entity class for respawn

		CSave saveHelper( pSaveData );
		pEntity->Save( saveHelper );

		pTable->size = pSaveData->size - pTable->location;	// Size of entity block is data size written to block
	}
}

// Find the matching global entity.  Spit out an error if the designer made entities of
// different classes with the same global name
CBaseEntity *FindGlobalEntity( string_t classname, string_t globalname )
{
	edict_t *pent = FIND_ENTITY_BY_STRING( NULL, "globalname", STRING( globalname ) );
	CBaseEntity *pReturn = CBaseEntity::Instance( pent );
	if( pReturn )
	{
		if( !FClassnameIs( pReturn->pev, STRING( classname ) ) )
		{
			ALERT( at_console, "Global entity found %s, wrong class %s\n", STRING( globalname ), STRING( pReturn->pev->classname ) );
			pReturn = NULL;
		}
	}

	return pReturn;
}

int DispatchRestore( edict_t *pent, SAVERESTOREDATA *pSaveData, int globalEntity )
{
	CBaseEntity *pEntity = (CBaseEntity *)GET_PRIVATE( pent );

	if( pEntity && pSaveData )
	{
		entvars_t tmpVars;
		Vector oldOffset;

		CRestore restoreHelper( pSaveData );
		if( globalEntity )
		{
			CRestore tmpRestore( pSaveData );
			tmpRestore.PrecacheMode( 0 );
			tmpRestore.ReadEntVars( "ENTVARS", &tmpVars );

			// HACKHACK - reset the save pointers, we're going to restore for real this time
			pSaveData->size = pSaveData->pTable[pSaveData->currentIndex].location;
			pSaveData->pCurrentData = pSaveData->pBaseData + pSaveData->size;
			// -------------------

			const globalentity_t *pGlobal = gGlobalState.EntityFromTable( tmpVars.globalname );

			// Don't overlay any instance of the global that isn't the latest
			// pSaveData->szCurrentMapName is the level this entity is coming from
			// pGlobla->levelName is the last level the global entity was active in.
			// If they aren't the same, then this global update is out of date.
			if( !FStrEq( pSaveData->szCurrentMapName, pGlobal->levelName ) )
				return 0;

			// Compute the new global offset
			oldOffset = pSaveData->vecLandmarkOffset;
			CBaseEntity *pNewEntity = FindGlobalEntity( tmpVars.classname, tmpVars.globalname );
			if( pNewEntity )
			{
				//ALERT( at_console, "Overlay %s with %s\n", STRING( pNewEntity->pev->classname ), STRING( tmpVars.classname ) );
				// Tell the restore code we're overlaying a global entity from another level
				restoreHelper.SetGlobalMode( 1 );	// Don't overwrite global fields
				pSaveData->vecLandmarkOffset = ( pSaveData->vecLandmarkOffset - pNewEntity->pev->mins ) + tmpVars.mins;
				pEntity = pNewEntity;// we're going to restore this data OVER the old entity
				pent = ENT( pEntity->pev );
				// Update the global table to say that the global definition of this entity should come from this level
				gGlobalState.EntityUpdate( pEntity->pev->globalname, gpGlobals->mapname );
			}
			else
			{
				// This entity will be freed automatically by the engine.  If we don't do a restore on a matching entity (below)
				// or call EntityUpdate() to move it to this level, we haven't changed global state at all.
				return 0;
			}
		}

		if( pEntity->ObjectCaps() & FCAP_MUST_SPAWN )
		{
			pEntity->Restore( restoreHelper );
			pEntity->Spawn();
		}
		else
		{
			pEntity->Restore( restoreHelper );
			pEntity->Precache();
		}

		// Again, could be deleted, get the pointer again.
		pEntity = (CBaseEntity *)GET_PRIVATE( pent );
#if 0
		if( pEntity && pEntity->pev->globalname && globalEntity ) 
		{
			ALERT( at_console, "Global %s is %s\n", STRING( pEntity->pev->globalname ), STRING( pEntity->pev->model ) );
		}
#endif
		// Is this an overriding global entity (coming over the transition), or one restoring in a level
		if( globalEntity )
		{
			//ALERT( at_console, "After: %f %f %f %s\n", pEntity->pev->origin.x, pEntity->pev->origin.y, pEntity->pev->origin.z, STRING( pEntity->pev->model ) );
			pSaveData->vecLandmarkOffset = oldOffset;
			if( pEntity )
			{
				UTIL_SetOrigin( pEntity->pev, pEntity->pev->origin );
				pEntity->OverrideReset();
			}
		}
		else if( pEntity && pEntity->pev->globalname ) 
		{
			const globalentity_t *pGlobal = gGlobalState.EntityFromTable( pEntity->pev->globalname );
			if( pGlobal )
			{
				// Already dead? delete
				if( pGlobal->state == GLOBAL_DEAD )
					return -1;
				else if( !FStrEq( STRING( gpGlobals->mapname ), pGlobal->levelName ) )
				{
					pEntity->MakeDormant();	// Hasn't been moved to this level yet, wait but stay alive
				}
				// In this level & not dead, continue on as normal
			}
			else
			{
				ALERT( at_error, "Global Entity %s (%s) not in table!!!\n", STRING( pEntity->pev->globalname ), STRING( pEntity->pev->classname ) );
				// Spawned entities default to 'On'
				gGlobalState.EntityAdd( pEntity->pev->globalname, gpGlobals->mapname, GLOBAL_ON );
			}
		}
	}
	return 0;
}

void DispatchObjectCollsionBox( edict_t *pent )
{
	CBaseEntity *pEntity = (CBaseEntity *)GET_PRIVATE( pent );
	if( pEntity )
	{
		pEntity->SetObjectCollisionBox();
	}
	else
		SetObjectCollisionBox( &pent->v );
}

void SaveWriteFields( SAVERESTOREDATA *pSaveData, const char *pname, void *pBaseData, TYPEDESCRIPTION *pFields, int fieldCount )
{
	CSave saveHelper( pSaveData );
	saveHelper.WriteFields( pname, pBaseData, pFields, fieldCount );
}

void SaveReadFields( SAVERESTOREDATA *pSaveData, const char *pname, void *pBaseData, TYPEDESCRIPTION *pFields, int fieldCount )
{
	CRestore restoreHelper( pSaveData );
	restoreHelper.ReadFields( pname, pBaseData, pFields, fieldCount );
}

edict_t *EHANDLE::Get( void ) 
{ 
	if( m_pent )
	{
		if( m_pent->serialnumber == m_serialnumber )
			return m_pent; 
		else
			return NULL;
	}
	return NULL; 
}

edict_t *EHANDLE::Set( edict_t *pent )
{
	if( pent )
	{
		m_pent = pent;
		m_serialnumber = m_pent->serialnumber;
	}
	else
	{
		m_pent = NULL;
		m_serialnumber = 0;
	}
	return pent; 
}

EHANDLE::operator CBaseEntity *() 
{ 
	return (CBaseEntity *)GET_PRIVATE( Get() ); 
}

CBaseEntity *EHANDLE::operator = ( CBaseEntity *pEntity )
{
	if( pEntity )
	{
		m_pent = ENT( pEntity->pev );
		if( m_pent )
			m_serialnumber = m_pent->serialnumber;
	}
	else
	{
		m_pent = NULL;
		m_serialnumber = 0;
	}
	return pEntity;
}

EHANDLE::operator int ()
{
	return Get() != NULL;
}

CBaseEntity * EHANDLE::operator -> ()
{
	return (CBaseEntity *)GET_PRIVATE( Get() ); 
}

// give health
int CBaseEntity::TakeHealth( float flHealth, int bitsDamageType )
{
	if( !pev->takedamage )
		return 0;

	// heal
	if( pev->health >= pev->max_health )
		return 0;

	pev->health += flHealth;

	if( pev->health > pev->max_health )
		pev->health = pev->max_health;

	return 1;
}

// inflict damage on this entity.  bitsDamageType indicates type of damage inflicted, ie: DMG_CRUSH

int CBaseEntity::TakeDamage( entvars_t *pevInflictor, entvars_t *pevAttacker, float flDamage, int bitsDamageType )
{
	Vector vecTemp;

	if( !pev->takedamage )
		return 0;

	// UNDONE: some entity types may be immune or resistant to some bitsDamageType
	
	// if Attacker == Inflictor, the attack was a melee or other instant-hit attack.
	// (that is, no actual entity projectile was involved in the attack so use the shooter's origin). 
	if( pevAttacker == pevInflictor )	
	{
		vecTemp = pevAttacker->origin - VecBModelOrigin( pev );
	}
	else
	// an actual missile was involved.
	{
		vecTemp = pevInflictor->origin - VecBModelOrigin( pev );
	}

	// this global is still used for glass and other non-monster killables, along with decals.
	g_vecAttackDir = vecTemp.Normalize();

	// save damage based on the target's armor level
	// figure momentum add (don't let hurt brushes or other triggers move player)
	if( ( !FNullEnt( pevInflictor ) ) && (pev->movetype == MOVETYPE_WALK || pev->movetype == MOVETYPE_STEP ) && ( pevAttacker->solid != SOLID_TRIGGER ) )
	{
		Vector vecDir = pev->origin - ( pevInflictor->absmin + pevInflictor->absmax ) * 0.5;
		vecDir = vecDir.Normalize();

		float flForce = flDamage * ( ( 32 * 32 * 72.0 ) / ( pev->size.x * pev->size.y * pev->size.z ) ) * 5;

		if( flForce > 1000.0 )
			flForce = 1000.0;
		pev->velocity = pev->velocity + vecDir * flForce;
	}

	// do the damage
	pev->health -= flDamage;
	if( pev->health <= 0 )
	{
		Killed( pevAttacker, GIB_NORMAL );
		return 0;
	}

	return 1;
}

void CBaseEntity::Killed( entvars_t *pevAttacker, int iGib )
{
	pev->takedamage = DAMAGE_NO;
	pev->deadflag = DEAD_DEAD;
	UTIL_Remove( this );
}

CBaseEntity *CBaseEntity::GetNextTarget( void )
{
	if( FStringNull( pev->target ) )
		return NULL;
	edict_t *pTarget = FIND_ENTITY_BY_TARGETNAME( NULL, STRING( pev->target ) );
	if( FNullEnt( pTarget ) )
		return NULL;

	return Instance( pTarget );
}

// Global Savedata for Delay
TYPEDESCRIPTION	CBaseEntity::m_SaveData[] =
{
	DEFINE_FIELD( CBaseEntity, m_pGoalEnt, FIELD_CLASSPTR ),

	DEFINE_FIELD( CBaseEntity, m_pfnThink, FIELD_FUNCTION ),		// UNDONE: Build table of these!!!
	DEFINE_FIELD( CBaseEntity, m_pfnTouch, FIELD_FUNCTION ),
	DEFINE_FIELD( CBaseEntity, m_pfnUse, FIELD_FUNCTION ),
	DEFINE_FIELD( CBaseEntity, m_pfnBlocked, FIELD_FUNCTION ),
};

int CBaseEntity::Save( CSave &save )
{
	if( save.WriteEntVars( "ENTVARS", pev ) )
		return save.WriteFields( "BASE", this, m_SaveData, ARRAYSIZE( m_SaveData ) );

	return 0;
}

int CBaseEntity::Restore( CRestore &restore )
{
	int status;

	status = restore.ReadEntVars( "ENTVARS", pev );
	if( status )
		status = restore.ReadFields( "BASE", this, m_SaveData, ARRAYSIZE( m_SaveData ) );

	if( pev->modelindex != 0 && !FStringNull( pev->model ) )
	{
		Vector mins, maxs;
		mins = pev->mins;	// Set model is about to destroy these
		maxs = pev->maxs;

		PRECACHE_MODEL( STRING( pev->model ) );
		SET_MODEL( ENT( pev ), STRING( pev->model ) );
		UTIL_SetSize( pev, mins, maxs );	// Reset them
	}

	return status;
}

// Initialize absmin & absmax to the appropriate box
void SetObjectCollisionBox( entvars_t *pev )
{
	if( ( pev->solid == SOLID_BSP ) && 
		 ( pev->angles.x || pev->angles.y || pev->angles.z ) )
	{
		// expand for rotation
		float max, v;
		int i;

		max = 0;
		for( i = 0; i < 3; i++ )
		{
			v = fabs( ( (float *)pev->mins )[i] );
			if( v > max )
				max = v;
			v = fabs( ( (float *)pev->maxs )[i] );
			if( v > max )
				max = v;
		}
		for( i = 0; i < 3; i++ )
		{
			( (float *)pev->absmin )[i] = ( (float *)pev->origin )[i] - max;
			( (float *)pev->absmax )[i] = ( (float *)pev->origin )[i] + max;
		}
	}
	else
	{
		pev->absmin = pev->origin + pev->mins;
		pev->absmax = pev->origin + pev->maxs;
	}

	pev->absmin.x -= 1;
	pev->absmin.y -= 1;
	pev->absmin.z -= 1;
	pev->absmax.x += 1;
	pev->absmax.y += 1;
	pev->absmax.z += 1;
}

void CBaseEntity::SetObjectCollisionBox( void )
{
	::SetObjectCollisionBox( pev );
}

int CBaseEntity::Intersects( CBaseEntity *pOther )
{
	if( pOther->pev->absmin.x > pev->absmax.x ||
		pOther->pev->absmin.y > pev->absmax.y ||
		pOther->pev->absmin.z > pev->absmax.z ||
		pOther->pev->absmax.x < pev->absmin.x ||
		pOther->pev->absmax.y < pev->absmin.y ||
		pOther->pev->absmax.z < pev->absmin.z )
		return 0;
	return 1;
}

void CBaseEntity::MakeDormant( void )
{
	SetBits( pev->flags, FL_DORMANT );
	
	// Don't touch
	pev->solid = SOLID_NOT;
	// Don't move
	pev->movetype = MOVETYPE_NONE;
	// Don't draw
	SetBits( pev->effects, EF_NODRAW );
	// Don't think
	pev->nextthink = 0;
	// Relink
	UTIL_SetOrigin( pev, pev->origin );
}

int CBaseEntity::IsDormant( void )
{
	return FBitSet( pev->flags, FL_DORMANT );
}

BOOL CBaseEntity::IsInWorld( void )
{
	// position 
	if( pev->origin.x >= 4096 )
		return FALSE;
	if( pev->origin.y >= 4096 )
		return FALSE;
	if( pev->origin.z >= 4096 )
		return FALSE;
	if( pev->origin.x <= -4096 )
		return FALSE;
	if( pev->origin.y <= -4096 )
		return FALSE;
	if( pev->origin.z <= -4096 )
		return FALSE;
	// speed
	if( pev->velocity.x >= 2000 )
		return FALSE;
	if( pev->velocity.y >= 2000 )
		return FALSE;
	if( pev->velocity.z >= 2000 )
		return FALSE;
	if( pev->velocity.x <= -2000 )
		return FALSE;
	if( pev->velocity.y <= -2000 )
		return FALSE;
	if( pev->velocity.z <= -2000 )
		return FALSE;

	return TRUE;
}

int CBaseEntity::ShouldToggle( USE_TYPE useType, BOOL currentState )
{
	if( useType != USE_TOGGLE && useType != USE_SET )
	{
		if( ( currentState && useType == USE_ON ) || ( !currentState && useType == USE_OFF ) )
			return 0;
	}
	return 1;
}

int CBaseEntity::DamageDecal( int bitsDamageType )
{
	if( pev->rendermode == kRenderTransAlpha )
		return -1;

	if( pev->rendermode != kRenderNormal )
		return DECAL_BPROOF1;

	return DECAL_GUNSHOT1 + RANDOM_LONG( 0, 4 );
}

// NOTE: szName must be a pointer to constant memory, e.g. "monster_class" because the entity
// will keep a pointer to it after this call.
CBaseEntity *CBaseEntity::Create( const char *szName, const Vector &vecOrigin, const Vector &vecAngles, edict_t *pentOwner )
{
	edict_t	*pent;
	CBaseEntity *pEntity;

	pent = CREATE_NAMED_ENTITY( MAKE_STRING( szName ) );
	if( FNullEnt( pent ) )
	{
		ALERT ( at_console, "NULL Ent in Create!\n" );
		return NULL;
	}
	pEntity = Instance( pent );
	if( !pEntity )
		return NULL;
	pEntity->pev->owner = pentOwner;
	pEntity->pev->origin = vecOrigin;
	pEntity->pev->angles = vecAngles;
	DispatchSpawn( pEntity->edict() );
	return pEntity;
}