/***
*
*	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.
*
****/
/*

===== combat.cpp ========================================================

  functions dealing with damage infliction & death

*/

#include "extdll.h"
#include "util.h"
#include "cbase.h"
#include "monsters.h"
#include "soundent.h"
#include "decals.h"
#include "animation.h"
#include "weapons.h"
#include "func_break.h"
#include "studio.h" //LRC
#include "material.h"

extern DLL_GLOBAL Vector		g_vecAttackDir;
extern DLL_GLOBAL int		g_iSkillLevel;

extern Vector VecBModelOrigin( entvars_t* pevBModel );
extern entvars_t *g_pevLastInflictor;

#define GERMAN_GIB_COUNT		4
#define HUMAN_GIB_COUNT		6
#define ALIEN_GIB_COUNT		4

MULTIDAMAGE gMultiDamage;

/*
==============================================================================

MULTI-DAMAGE

Collects multiple small damages into a single damage

==============================================================================
*/

//
// ClearMultiDamage - resets the global multi damage accumulator
//
void ClearMultiDamage(void)
{
	gMultiDamage.pEntity = NULL;
	gMultiDamage.amount	= 0;
	gMultiDamage.type = 0;
}


//
// ApplyMultiDamage - inflicts contents of global multi damage register on gMultiDamage.pEntity
//
// GLOBALS USED:
//		gMultiDamage

void ApplyMultiDamage(entvars_t *pevInflictor, entvars_t *pevAttacker )
{
	Vector		vecSpot1;//where blood comes from
	Vector		vecDir;//direction blood should go
	TraceResult	tr;
	
	if ( !gMultiDamage.pEntity )
		return;

	gMultiDamage.pEntity->TakeDamage(pevInflictor, pevAttacker, gMultiDamage.amount, gMultiDamage.type );
}


// GLOBALS USED:
//		gMultiDamage

void AddMultiDamage( entvars_t *pevInflictor, CBaseEntity *pEntity, float flDamage, int bitsDamageType)
{
	if ( !pEntity )
		return;
	
	gMultiDamage.type |= bitsDamageType;

	if ( pEntity != gMultiDamage.pEntity )
	{
		ApplyMultiDamage(pevInflictor,pevInflictor); // UNDONE: wrong attacker!
		gMultiDamage.pEntity	= pEntity;
		gMultiDamage.amount		= 0;
	}

	gMultiDamage.amount += flDamage;
}

/*
================
SpawnBlood
================
*/
void SpawnBlood(Vector vecSpot, int bloodColor, float flDamage)
{
	UTIL_BloodDrips( vecSpot, g_vecAttackDir, bloodColor, (int)flDamage );
}


const char *DamageDecal( CBaseEntity *pEntity, int bitsDamageType )
{
	if( !pEntity )
		return "shot";
	
	return pEntity->DamageDecal( bitsDamageType );
}

void SpawnPartEffect( TraceResult *pTrace, matdef_t *pMat )
{
	if( !pMat || pTrace->flFraction == 1.0f )
		return;

	// fire effects
	for( int i = 0; pMat->impact_parts[i] != NULL; i++ )
	{
		MESSAGE_BEGIN( MSG_PVS, gmsgPartEffect, pTrace->vecEndPos );
			WRITE_COORD( pTrace->vecEndPos.x );
			WRITE_COORD( pTrace->vecEndPos.y );
			WRITE_COORD( pTrace->vecEndPos.z );
			WRITE_COORD( pTrace->vecPlaneNormal.x * 8192 );
			WRITE_COORD( pTrace->vecPlaneNormal.y * 8192 );
			WRITE_COORD( pTrace->vecPlaneNormal.z * 8192 );
			WRITE_STRING( pMat->impact_parts[i] );
		MESSAGE_END();
	}
}

void DecalGunshot( TraceResult *pTrace, int iBulletType, const Vector &vecSrc, bool fromPlayer )
{
	// buz
	if (pTrace->fInWater )
		return;

	// Is the entity valid
	if ( !UTIL_IsValidEntity( pTrace->pHit ) )
		return;

	CBaseEntity *pHit = CBaseEntity :: Instance( pTrace->pHit );

	matdef_t *pMat = NULL;

	if( FBitSet( pHit->pev->flags, ( FL_MONSTER|FL_CLIENT )))
	{
		switch( iBulletType )
		{
		case BULLET_NORMAL:
		case BULLET_BUCKSHOT:
		default:
			UTIL_StudioDecalTrace( pTrace, DamageDecal( pHit, DMG_BULLET ));
			break;
		case BULLET_STAB:
			UTIL_StudioDecalTrace( pTrace, DamageDecal( pHit, DMG_CLUB ));
			break;
		}
	}
	else if( !fromPlayer )
	{
		if( pHit->pev->solid == SOLID_BSP || pHit->pev->movetype == MOVETYPE_PUSHSTEP )
		{
			pMat = COM_MatDefFromSurface( TRACE_SURFACE( pTrace->pHit, vecSrc, pTrace->vecEndPos ), pTrace->vecEndPos );
			if ( pMat ) UTIL_TraceCustomDecal( pTrace, pMat->impact_decal, RANDOM_FLOAT( 0.0f, 360.0f ));
		}
		else if( pHit->pev->solid == SOLID_CUSTOM && pTrace->pMat )
		{
			pMat = pTrace->pMat->effects;
			if ( pMat ) UTIL_StudioDecalTrace( pTrace, pMat->impact_decal );
		}
	}

	SpawnPartEffect( pTrace, pMat );
}

//
// EjectBrass - tosses a brass shell from passed origin at passed velocity
//
void EjectBrass ( const Vector &vecOrigin, const Vector &vecVelocity, float rotation, int model, int soundtype )
{
	// FIX: when the player shoots, their gun isn't in the same position as it is on the model other players see.
	MESSAGE_BEGIN( MSG_PVS, SVC_TEMPENTITY, vecOrigin );
		WRITE_BYTE( TE_MODEL);
		WRITE_COORD( vecOrigin.x);
		WRITE_COORD( vecOrigin.y);
		WRITE_COORD( vecOrigin.z);
		WRITE_COORD( vecVelocity.x);
		WRITE_COORD( vecVelocity.y);
		WRITE_COORD( vecVelocity.z);
		WRITE_ANGLE( rotation );
		WRITE_SHORT( model );
		WRITE_BYTE ( soundtype);
		WRITE_BYTE ( 100 );// 10 seconds
	MESSAGE_END();
}

// HACKHACK -- The gib velocity equations don't work
void CGib :: LimitVelocity( void )
{
	float length = pev->velocity.Length();

	// ceiling at 1500.  The gib velocity equation is not bounded properly.  Rather than tune it
	// in 3 separate places again, I'll just limit it here.
	if ( length > 1500.0 )
		pev->velocity = pev->velocity.Normalize() * 1500;		// This should really be sv_maxvelocity * 0.75 or something
}


void CGib :: SpawnStickyGibs( entvars_t *pevVictim, Vector vecOrigin, int cGibs )
{
	int i;

	if ( g_Language == LANGUAGE_GERMAN )
	{
		// no sticky gibs in germany right now!
		return; 
	}

	for ( i = 0 ; i < cGibs ; i++ )
	{
		CGib *pGib = GetClassPtr( (CGib *)NULL );

		pGib->Spawn( "models/stickygib.mdl" );
		pGib->pev->body = RANDOM_LONG(0,2);

		if ( pevVictim )
		{
			pGib->pev->origin.x = vecOrigin.x + RANDOM_FLOAT( -3, 3 );
			pGib->pev->origin.y = vecOrigin.y + RANDOM_FLOAT( -3, 3 );
			pGib->pev->origin.z = vecOrigin.z + RANDOM_FLOAT( -3, 3 );

			/*
			pGib->pev->origin.x = pevVictim->absmin.x + pevVictim->size.x * (RANDOM_FLOAT ( 0 , 1 ) );
			pGib->pev->origin.y = pevVictim->absmin.y + pevVictim->size.y * (RANDOM_FLOAT ( 0 , 1 ) );
			pGib->pev->origin.z = pevVictim->absmin.z + pevVictim->size.z * (RANDOM_FLOAT ( 0 , 1 ) );
			*/

			// make the gib fly away from the attack vector
			pGib->pev->velocity = g_vecAttackDir * -1;

			// mix in some noise
			pGib->pev->velocity.x += RANDOM_FLOAT ( -0.15, 0.15 );
			pGib->pev->velocity.y += RANDOM_FLOAT ( -0.15, 0.15 );
			pGib->pev->velocity.z += RANDOM_FLOAT ( -0.15, 0.15 );

			pGib->pev->velocity = pGib->pev->velocity * 900;

			pGib->pev->avelocity.x = RANDOM_FLOAT ( 250, 400 );
			pGib->pev->avelocity.y = RANDOM_FLOAT ( 250, 400 );

			// copy owner's blood color
			pGib->m_bloodColor = (CBaseEntity::Instance(pevVictim))->BloodColor();
		
			if ( pevVictim->health > -50)
			{
				pGib->pev->velocity = pGib->pev->velocity * 0.7;
			}
			else if ( pevVictim->health > -200)
			{
				pGib->pev->velocity = pGib->pev->velocity * 2;
			}
			else
			{
				pGib->pev->velocity = pGib->pev->velocity * 4;
			}

			
			pGib->pev->movetype = MOVETYPE_TOSS;
			pGib->pev->solid = SOLID_BBOX;
			UTIL_SetSize ( pGib->pev, Vector ( 0, 0 ,0 ), Vector ( 0, 0, 0 ) );
			pGib->SetTouch(&CGib:: StickyGibTouch );
			pGib->SetThink (NULL);
		}
		pGib->LimitVelocity();
	}
}

void CGib :: SpawnHeadGib( entvars_t *pevVictim )
{
	if ( g_Language == LANGUAGE_GERMAN )
		SpawnHeadGib(pevVictim, "models/germangibs.mdl" );// throw one head
	else
		SpawnHeadGib(pevVictim, "models/hgibs.mdl" );
}

void CGib :: SpawnHeadGib( entvars_t *pevVictim, const char* szGibModel )
{
	CGib *pGib = GetClassPtr( (CGib *)NULL );

	pGib->Spawn( szGibModel );// throw one head
	pGib->pev->body = 0;

	if ( pevVictim )
	{
		pGib->pev->origin = pevVictim->origin + pevVictim->view_ofs;
		
		edict_t		*pentPlayer = FIND_CLIENT_IN_PVS( pGib->edict() );
		
		if ( RANDOM_LONG ( 0, 100 ) <= 5 && pentPlayer )
		{
			// 5% chance head will be thrown at player's face.
			entvars_t	*pevPlayer;

			pevPlayer = VARS( pentPlayer );
			pGib->pev->velocity = ( ( pevPlayer->origin + pevPlayer->view_ofs ) - pGib->pev->origin ).Normalize() * 300;
			pGib->pev->velocity.z += 100;
		}
		else
		{
			pGib->pev->velocity = Vector (RANDOM_FLOAT(-100,100), RANDOM_FLOAT(-100,100), RANDOM_FLOAT(200,300));
		}


		pGib->pev->avelocity.x = RANDOM_FLOAT ( 100, 200 );
		pGib->pev->avelocity.y = RANDOM_FLOAT ( 100, 300 );

		// copy owner's blood color
		pGib->m_bloodColor = (CBaseEntity::Instance(pevVictim))->BloodColor();
	
		if ( pevVictim->health > -50)
		{
			pGib->pev->velocity = pGib->pev->velocity * 0.7;
		}
		else if ( pevVictim->health > -200)
		{
			pGib->pev->velocity = pGib->pev->velocity * 2;
		}
		else
		{
			pGib->pev->velocity = pGib->pev->velocity * 4;
		}
	}
	pGib->LimitVelocity();
}

void CGib :: SpawnRandomGibs( entvars_t *pevVictim, int cGibs, int human )
{
	if ( g_Language == LANGUAGE_GERMAN )
		SpawnRandomGibs(pevVictim, cGibs, 1, "models/germangibs.mdl");
	else if (human)
		SpawnRandomGibs(pevVictim, cGibs, 1, "models/hgibs.mdl");
	else
		SpawnRandomGibs(pevVictim, cGibs, 0, "models/agibs.mdl");
}

//LRC - changed signature, to support custom gib models
void CGib :: SpawnRandomGibs( entvars_t *pevVictim, int cGibs, int notfirst, const char *szGibModel )
{
	if (cGibs == 0) return; // spawn nothing!

	CGib *pGib = GetClassPtr( (CGib *)NULL );
	pGib->Spawn( szGibModel );

	//LRC - check the model itself to find out how many gibs are available
	studiohdr_t *pstudiohdr = (studiohdr_t *)(GET_MODEL_PTR( ENT(pGib->pev) ));
	if (! pstudiohdr)
		return;

	mstudiobodyparts_t *pbodypart = (mstudiobodyparts_t *)((byte *)pstudiohdr + pstudiohdr->bodypartindex);
	//ALERT(at_console, "read %d bodyparts, canonical is %d\n", pbodypart->nummodels, HUMAN_GIB_COUNT);

	for (int cSplat = 0 ; cSplat < cGibs ; cSplat++ )
	{
		if (pGib == NULL) // first time through, we set pGib before the loop started
		{
			pGib = GetClassPtr( (CGib *)NULL );
			pGib->Spawn( szGibModel );
		}

		if (notfirst)
			pGib->pev->body = RANDOM_LONG(1, pbodypart->nummodels - 1);// start at one to avoid throwing random amounts of skulls (0th gib)
		else
			pGib->pev->body = RANDOM_LONG(0, pbodypart->nummodels - 1);

		if ( pevVictim )
		{
			// spawn the gib somewhere in the monster's bounding volume
			pGib->pev->origin.x = pevVictim->absmin.x + pevVictim->size.x * (RANDOM_FLOAT ( 0 , 1 ) );
			pGib->pev->origin.y = pevVictim->absmin.y + pevVictim->size.y * (RANDOM_FLOAT ( 0 , 1 ) );
			pGib->pev->origin.z = pevVictim->absmin.z + pevVictim->size.z * (RANDOM_FLOAT ( 0 , 1 ) ) + 1;	// absmin.z is in the floor because the engine subtracts 1 to enlarge the box

			// make the gib fly away from the attack vector
			pGib->pev->velocity = g_vecAttackDir * -1;

			// mix in some noise
			pGib->pev->velocity.x += RANDOM_FLOAT ( -0.25, 0.25 );
			pGib->pev->velocity.y += RANDOM_FLOAT ( -0.25, 0.25 );
			pGib->pev->velocity.z += RANDOM_FLOAT ( -0.25, 0.25 );

			pGib->pev->velocity = pGib->pev->velocity * RANDOM_FLOAT ( 300, 400 );

			pGib->pev->avelocity.x = RANDOM_FLOAT ( 100, 200 );
			pGib->pev->avelocity.y = RANDOM_FLOAT ( 100, 300 );

			// copy owner's blood color
			pGib->m_bloodColor = (CBaseEntity::Instance(pevVictim))->BloodColor();
			
			if ( pevVictim->health > -50)
			{
				pGib->pev->velocity = pGib->pev->velocity * 0.7;
			}
			else if ( pevVictim->health > -200)
			{
				pGib->pev->velocity = pGib->pev->velocity * 2;
			}
			else
			{
				pGib->pev->velocity = pGib->pev->velocity * 4;
			}

			pGib->pev->solid = SOLID_BBOX;
			UTIL_SetSize ( pGib->pev, Vector( 0 , 0 , 0 ), Vector ( 0, 0, 0 ) );
		}
		pGib->LimitVelocity();
		pGib = NULL; //LRC
	}
}

// automatically set collision box
void CBaseMonster :: AutoSetSize( void )
{
	studiohdr_t *pstudiohdr;
	pstudiohdr = (studiohdr_t *)GET_MODEL_PTR( edict() );

	if( pstudiohdr == NULL )
	{
		UTIL_SetSize( pev, Vector( -10, -10, -10 ), Vector( 10, 10, 10 ));
		ALERT( at_error, "env_static: unable to fetch model pointer!\n" );
		return;
	}

	mstudioseqdesc_t *pseqdesc = (mstudioseqdesc_t *)((byte *)pstudiohdr + pstudiohdr->seqindex);
	UTIL_SetSize( pev, pseqdesc[pev->sequence].bbmin, pseqdesc[pev->sequence].bbmax );
}

//LRC - work out gibs from blood colour, instead of from class.
BOOL CBaseMonster :: HasHumanGibs( void )
{
	int myClass = Classify();

	// these types of monster don't use gibs
	if ( myClass == CLASS_NONE || myClass == CLASS_MACHINE ||
		 myClass == CLASS_PLAYER_BIOWEAPON && myClass == CLASS_ALIEN_BIOWEAPON)
	{
		return FALSE;
	}
	else
	{
		return (this->m_bloodColor == BLOOD_COLOR_RED);
	}
}

//LRC - work out gibs from blood colour, instead.
BOOL CBaseMonster :: HasAlienGibs( void )
{
	int myClass = Classify();

	// these types of monster don't use gibs
	if ( myClass == CLASS_NONE || myClass == CLASS_MACHINE ||
		 myClass == CLASS_PLAYER_BIOWEAPON && myClass == CLASS_ALIEN_BIOWEAPON)
	{
		return FALSE;
	}
	else
	{
		return (this->m_bloodColor == BLOOD_COLOR_GREEN);
	}
}

void CBaseMonster::FadeMonster( void )
{
	StopAnimation();
	pev->velocity = g_vecZero;
	pev->movetype = MOVETYPE_NONE;
	pev->avelocity = g_vecZero;
	pev->animtime = gpGlobals->time;
	pev->effects |= EF_NOINTERP;
	SUB_StartFadeOut();
}

//=========================================================
// GibMonster - create some gore and get rid of a monster's
// model.
//=========================================================
void CBaseMonster :: GibMonster( void )
{
	TraceResult	tr;
	BOOL		gibbed = FALSE;
	int			iszCustomGibs;

	EMIT_SOUND(ENT(pev), CHAN_WEAPON, "common/bodysplat.wav", 1, ATTN_NORM);		

	if ( iszCustomGibs = HasCustomGibs() ) //LRC - monster_generic can have a custom gibset
	{
		if ( CVAR_GET_FLOAT("violence_hgibs") != 0 )
		{
			CGib::SpawnHeadGib( pev, STRING(iszCustomGibs) );
			CGib::SpawnRandomGibs( pev, 4, 1, STRING(iszCustomGibs) );
		}
		gibbed = TRUE;
	}
	// only humans throw skulls !!!UNDONE - eventually monsters will have their own sets of gibs
	else if ( HasHumanGibs() )
	{
		if ( CVAR_GET_FLOAT("violence_hgibs") != 0 )// Only the player will ever fail this test
		{
			CGib::SpawnHeadGib( pev );
			CGib::SpawnRandomGibs( pev, 4, 1 );	// throw some human gibs.
		}
		gibbed = TRUE;
	}
	else if ( HasAlienGibs() )
	{
		if ( CVAR_GET_FLOAT("violence_agibs") != 0 )// Should never fail this test, but someone might call it directly
		{
			CGib::SpawnRandomGibs( pev, 4, 0 );	// Throw alien gibs
		}
		gibbed = TRUE;
	}

	if ( !IsPlayer() )
	{
		if ( gibbed )
		{
			// don't remove players!
			SetThink(&CBaseMonster :: SUB_Remove );
			SetNextThink( 0 );
		}
		else
		{
			FadeMonster();
		}
	}
}

//=========================================================
// GetDeathActivity - determines the best type of death
// anim to play.
//=========================================================
Activity CBaseMonster :: GetDeathActivity ( void )
{
	Activity	deathActivity;
	BOOL		fTriedDirection;
	float		flDot;
	TraceResult	tr;
	Vector		vecSrc;

	if ( pev->deadflag != DEAD_NO )
	{
		// don't run this while dying.
		return m_IdealActivity;
	}

	vecSrc = Center();

	fTriedDirection = FALSE;
	deathActivity = ACT_DIESIMPLE;// in case we can't find any special deaths to do.

	UTIL_MakeVectors ( pev->angles );
	flDot = DotProduct ( gpGlobals->v_forward, g_vecAttackDir * -1 );

	switch ( m_LastHitGroup )
	{
		// try to pick a region-specific death.
	case HITGROUP_HEAD:

		// buz: play brains squish sound
	//	ALERT(at_console, "HEADSHOT SOUND\n");
		UTIL_EmitAmbientSound(ENT(0), vecSrc, "common/headshot.wav", 1, ATTN_NORM, 0, 100);
		deathActivity = ACT_DIE_HEADSHOT;		
		break;

	case HITGROUP_STOMACH:
		deathActivity = ACT_DIE_GUTSHOT;
		break;

	case HITGROUP_GENERIC:
		// try to pick a death based on attack direction
		fTriedDirection = TRUE;

		if ( flDot > 0.3 )
		{
			deathActivity = ACT_DIEFORWARD;
		}
		else if ( flDot <= -0.3 )
		{
			deathActivity = ACT_DIEBACKWARD;
		}
		break;

	default:
		// try to pick a death based on attack direction
		fTriedDirection = TRUE;

		if ( flDot > 0.3 )
		{
			deathActivity = ACT_DIEFORWARD;
		}
		else if ( flDot <= -0.3 )
		{
			deathActivity = ACT_DIEBACKWARD;
		}
		break;
	}


	// can we perform the prescribed death?
	if ( LookupActivity ( deathActivity ) == ACTIVITY_NOT_AVAILABLE )
	{
		// no! did we fail to perform a directional death? 
		if ( fTriedDirection )
		{
			// if yes, we're out of options. Go simple.
			deathActivity = ACT_DIESIMPLE;
		}
		else
		{
			// cannot perform the ideal region-specific death, so try a direction.
			if ( flDot > 0.3 )
			{
				deathActivity = ACT_DIEFORWARD;
			}
			else if ( flDot <= -0.3 )
			{
				deathActivity = ACT_DIEBACKWARD;
			}
		}
	}

	if ( LookupActivity ( deathActivity ) == ACTIVITY_NOT_AVAILABLE )
	{
		// if we're still invalid, simple is our only option.
		deathActivity = ACT_DIESIMPLE;
	}

	if ( deathActivity == ACT_DIEFORWARD )
	{
			// make sure there's room to fall forward
			UTIL_TraceHull ( vecSrc, vecSrc + gpGlobals->v_forward * 64, dont_ignore_monsters, head_hull, edict(), &tr );

			if ( tr.flFraction != 1.0 )
			{
				deathActivity = ACT_DIESIMPLE;
			}
	}

	if ( deathActivity == ACT_DIEBACKWARD )
	{
			// make sure there's room to fall backward
			UTIL_TraceHull ( vecSrc, vecSrc - gpGlobals->v_forward * 64, dont_ignore_monsters, head_hull, edict(), &tr );

			if ( tr.flFraction != 1.0 )
			{
				deathActivity = ACT_DIESIMPLE;
			}
	}

	return deathActivity;
}

//=========================================================
// GetSmallFlinchActivity - determines the best type of flinch
// anim to play.
//=========================================================
Activity CBaseMonster :: GetSmallFlinchActivity ( void )
{
	Activity	flinchActivity;
	BOOL		fTriedDirection;
	float		flDot;

	fTriedDirection = FALSE;
	UTIL_MakeVectors ( pev->angles );
	flDot = DotProduct ( gpGlobals->v_forward, g_vecAttackDir * -1 );
	
	switch ( m_LastHitGroup )
	{
		// pick a region-specific flinch
	case HITGROUP_HEAD:
		flinchActivity = ACT_FLINCH_HEAD;
		break;
	case HITGROUP_STOMACH:
		flinchActivity = ACT_FLINCH_STOMACH;
		break;
	case HITGROUP_LEFTARM:
		flinchActivity = ACT_FLINCH_LEFTARM;
		break;
	case HITGROUP_RIGHTARM:
		flinchActivity = ACT_FLINCH_RIGHTARM;
		break;
	case HITGROUP_LEFTLEG:
		flinchActivity = ACT_FLINCH_LEFTLEG;
		break;
	case HITGROUP_RIGHTLEG:
		flinchActivity = ACT_FLINCH_RIGHTLEG;
		break;
	case HITGROUP_GENERIC:
	default:
		// just get a generic flinch.
		flinchActivity = ACT_SMALL_FLINCH;
		break;
	}


	// do we have a sequence for the ideal activity?
	if ( LookupActivity ( flinchActivity ) == ACTIVITY_NOT_AVAILABLE )
	{
		flinchActivity = ACT_SMALL_FLINCH;
	}

	return flinchActivity;
}


void CBaseMonster::BecomeDead( void )
{
	pev->takedamage = DAMAGE_YES;// don't let autoaim aim at corpses.
	
	// give the corpse half of the monster's original maximum health. 
	pev->health = pev->max_health / 2;
	pev->max_health = 5; // max_health now becomes a counter for how many blood decals the corpse can place.

	// make the corpse fly away from the attack vector
	pev->movetype = MOVETYPE_TOSS;
	pev->solid = SOLID_NOT;
	//pev->flags &= ~FL_ONGROUND;
	//pev->origin.z += 2;
	//pev->velocity = g_vecAttackDir * -1;
	//pev->velocity = pev->velocity * RANDOM_FLOAT( 300, 400 );
}

BOOL CBaseMonster::ShouldGibMonster( int iGib )
{
	if ( ( iGib == GIB_NORMAL && pev->health < GIB_HEALTH_VALUE ) || ( iGib == GIB_ALWAYS ) )
		return TRUE;
	
	return FALSE;
}

void CBaseMonster::CallGibMonster( void )
{
	BOOL fade = FALSE;

	if ( HasHumanGibs() )
	{
		if ( CVAR_GET_FLOAT("violence_hgibs") == 0 )
			fade = TRUE;
	}
	else if ( HasAlienGibs() )
	{
		if ( CVAR_GET_FLOAT("violence_agibs") == 0 )
			fade = TRUE;
	}

	pev->takedamage = DAMAGE_NO;
	pev->solid = SOLID_NOT;// do something with the body. while monster blows up

	if ( fade )
	{
		FadeMonster();
	}
	else
	{
		pev->effects |= EF_NODRAW; // make the model invisible.
		GibMonster();
	}

	pev->deadflag = DEAD_DEAD;
	FCheckAITrigger();

	// don't let the status bar glitch for players.with <0 health.
	if (pev->health < -99)
	{
		pev->health = 0;
	}
	
	if ( ShouldFadeOnDeath() && !fade )
		UTIL_Remove(this);
}

const char *CBaseMonster::DamageDecal( int bitsDamageType )
{
	if( bitsDamageType & ( DMG_BULLET|DMG_CLUB ))
	{
		if( BloodColor() == BLOOD_COLOR_RED )
			return "bodyhurt_red";
		else if( BloodColor() == BLOOD_COLOR_YELLOW )
			return "bodyhurt_yellow";
	}

	// Assume no blood is vehicles or furniture
	return "shot";
}

/*
============
Killed
============
*/
void CBaseMonster :: Killed( entvars_t *pevAttacker, int iGib )
{
	unsigned int	cCount = 0;
	BOOL			fDone = FALSE;

	if ( HasMemory( bits_MEMORY_KILLED ) )
	{
		if ( ShouldGibMonster( iGib ) )
			CallGibMonster();
		return;
	}

	Remember( bits_MEMORY_KILLED );

	// clear the deceased's sound channels.(may have been firing or reloading when killed)
	EMIT_SOUND(ENT(pev), CHAN_WEAPON, "common/null.wav", 1, ATTN_NORM);
	m_IdealMonsterState = MONSTERSTATE_DEAD;
	// Make sure this condition is fired too (TakeDamage breaks out before this happens on death)
	SetConditions( bits_COND_LIGHT_DAMAGE );
	
	// tell owner ( if any ) that we're dead.This is mostly for MonsterMaker functionality.
	CBaseEntity *pOwner = CBaseEntity::Instance(pev->owner);
	if ( pOwner )
	{
		pOwner->DeathNotice( pev );
	}

	if	( ShouldGibMonster( iGib ) )
	{
		CallGibMonster();
		return;
	}
	else if ( pev->flags & FL_MONSTER )
	{
		SetTouch( NULL );
		BecomeDead();
	}
	
	// don't let the status bar glitch for players.with <0 health.
	if (pev->health < -99)
	{
		pev->health = 0;
	}
	
	//pev->enemy = ENT( pevAttacker );//why? (sjb)
	
	m_IdealMonsterState = MONSTERSTATE_DEAD;
}

//
// fade out - slowly fades a entity out, then removes it.
//
// DON'T USE ME FOR GIBS AND STUFF IN MULTIPLAYER! 
// SET A FUTURE THINK AND A RENDERMODE!!
void CBaseEntity :: SUB_StartFadeOut ( void )
{
	if (pev->rendermode == kRenderNormal)
	{
		pev->renderamt = 255;
		pev->rendermode = kRenderTransTexture;
	}

	pev->solid = SOLID_NOT;
	pev->avelocity = g_vecZero;

	SetNextThink( 0.1 );
	SetThink(&CBaseEntity :: SUB_FadeOut );
}

void CBaseEntity :: SUB_FadeOut ( void  )
{
	if ( pev->renderamt > 7 )
	{
		pev->renderamt -= 7;
		SetNextThink( 0.1 );
	}
	else 
	{
		pev->renderamt = 0;
		SetNextThink( 0.2 );
		SetThink(&CBaseEntity :: SUB_Remove );
	}
}

//=========================================================
// WaitTillLand - in order to emit their meaty scent from
// the proper location, gibs should wait until they stop 
// bouncing to emit their scent. That's what this function
// does.
//=========================================================
void CGib :: WaitTillLand ( void )
{
	if (!IsInWorld())
	{
		UTIL_Remove( this );
		return;
	}

	if ( pev->velocity == g_vecZero )
	{
		SetThink(&CGib ::SUB_StartFadeOut);
		SetNextThink( m_lifeTime );

		// If you bleed, you stink!
		if ( m_bloodColor != DONT_BLEED )
		{
			// ok, start stinkin!
			CSoundEnt::InsertSound ( bits_SOUND_MEAT, pev->origin, 384, 25 );
		}
	}
	else
	{
		// wait and check again in another half second.
		SetNextThink( 0.5 );
	}
}

//
// Gib bounces on the ground or wall, sponges some blood down, too!
//
void CGib :: BounceGibTouch ( CBaseEntity *pOther )
{
	Vector	vecSpot;
	TraceResult	tr;
	
	//if ( RANDOM_LONG(0,1) )
	//	return;// don't bleed everytime

	if (pev->flags & FL_ONGROUND)
	{
		pev->velocity = pev->velocity * 0.9;
		pev->angles.x = 0;
		pev->angles.z = 0;
		pev->avelocity.x = 0;
		pev->avelocity.z = 0;
	}
	else
	{
		if ( g_Language != LANGUAGE_GERMAN && m_cBloodDecals > 0 && m_bloodColor != DONT_BLEED )
		{
			vecSpot = pev->origin + Vector ( 0 , 0 , 8 );//move up a bit, and trace down.
			UTIL_TraceLine ( vecSpot, vecSpot + Vector ( 0, 0, -24 ),  ignore_monsters, ENT(pev), & tr);

			UTIL_BloodDecalTrace( &tr, m_bloodColor );

			m_cBloodDecals--; 
		}

		if ( m_material != matNone && RANDOM_LONG(0,2) == 0 )
		{
			float volume;
			float zvel = fabs(pev->velocity.z);
		
			volume = 0.8 * min(1.0, ((float)zvel) / 450.0);

			CBreakable::MaterialSoundRandom( edict(), (Materials)m_material, volume );
		}
	}
}

//
// Sticky gib puts blood on the wall and stays put. 
//
void CGib :: StickyGibTouch ( CBaseEntity *pOther )
{
	Vector	vecSpot;
	TraceResult	tr;
	
	SetThink(&CGib :: SUB_Remove );
	SetNextThink( 10 );

	if ( !FClassnameIs( pOther->pev, "worldspawn" ) )
	{
		SetNextThink( 0 );
		return;
	}

	UTIL_TraceLine ( pev->origin, pev->origin + pev->velocity * 32,  ignore_monsters, ENT(pev), & tr);

	UTIL_BloodDecalTrace( &tr, m_bloodColor );

	pev->velocity = tr.vecPlaneNormal * -1;
	pev->angles = UTIL_VecToAngles ( pev->velocity );
	pev->velocity = g_vecZero; 
	pev->avelocity = g_vecZero;
	pev->movetype = MOVETYPE_NONE;
}

//
// Throw a chunk
//
void CGib :: Spawn( const char *szGibModel )
{
	pev->movetype = MOVETYPE_BOUNCE;
	pev->friction = 0.55; // deading the bounce a bit
	
	// sometimes an entity inherits the edict from a former piece of glass,
	// and will spawn using the same render FX or rendermode! bad!
	pev->renderamt = 255;
	pev->rendermode = kRenderNormal;
	pev->renderfx = kRenderFxNone;
	pev->solid = SOLID_TRIGGER; //LRC - so that they don't get in each other's way when we fire lots
//	pev->solid = SOLID_SLIDEBOX;/// hopefully this will fix the VELOCITY TOO LOW crap
	pev->classname = MAKE_STRING("gib");

	SET_MODEL(ENT(pev), szGibModel);
	UTIL_SetSize(pev, Vector( 0, 0, 0), Vector(0, 0, 0));

	SetNextThink( 4 );
	m_lifeTime = 25;
	SetThink(&CGib :: WaitTillLand );
	SetTouch(&CGib :: BounceGibTouch );

	m_material = matNone;
	m_cBloodDecals = 5;// how many blood decals this gib can place (1 per bounce until none remain). 
}

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

	// clear out any damage types we healed.
	// UNDONE: generic health should not heal any
	// UNDONE: time-based damage

	m_bitsDamageType &= ~(bitsDamageType & ~DMG_TIMEBASED);
	
	return CBaseEntity::TakeHealth(flHealth, bitsDamageType);
}

/*
============
TakeDamage

The damage is coming from inflictor, but get mad at attacker
This should be the only function that ever reduces health.
bitsDamageType indicates the type of damage sustained, ie: DMG_SHOCK

Time-based damage: only occurs while the monster is within the trigger_hurt.
When a monster is poisoned via an arrow etc it takes all the poison damage at once.

GLOBALS ASSUMED SET:  g_iSkillLevel
============
*/
int CBaseMonster :: TakeDamage( entvars_t *pevInflictor, entvars_t *pevAttacker, float flDamage, int bitsDamageType )
{
	float	flTake;
	Vector	vecDir;

	if (!pev->takedamage)
		return 0;

	if ( !IsAlive() )
	{
		return DeadTakeDamage( pevInflictor, pevAttacker, flDamage, bitsDamageType );
	}

	if ( pev->deadflag == DEAD_NO )
	{
		// no pain sound during death animation.
		PainSound();// "Ouch!"
	}

	//!!!LATER - make armor consideration here!
	flTake = flDamage;

	// set damage type sustained
	m_bitsDamageType |= bitsDamageType;

	// grab the vector of the incoming attack. ( pretend that the inflictor is a little lower than it really is, so the body will tend to fly upward a bit).
	vecDir = Vector( 0, 0, 0 );
	if (!FNullEnt( pevInflictor ))
	{
		CBaseEntity *pInflictor = CBaseEntity :: Instance( pevInflictor );
		if (pInflictor)
		{
			vecDir = ( pInflictor->Center() - Vector ( 0, 0, 10 ) - Center() ).Normalize();
			vecDir = g_vecAttackDir = vecDir.Normalize();
		}
	}

	// add to the damage total for clients, which will be sent as a single
	// message at the end of the frame
	// todo: remove after combining shotgun blasts?
	if ( IsPlayer() )
	{
		if ( pevInflictor )
			pev->dmg_inflictor = ENT(pevInflictor);

		pev->dmg_take += flTake;

		// check for godmode or invincibility
		if ( pev->flags & FL_GODMODE )
		{
			return 0;
		}
	}

	// if this is a player, move him around!
	if ( ( !FNullEnt( pevInflictor ) ) && (pev->movetype == MOVETYPE_WALK) && (!pevAttacker || pevAttacker->solid != SOLID_TRIGGER) )
	{
		pev->velocity = pev->velocity + vecDir * -DamageForce( flDamage );
	}

	// do the damage
	pev->health -= flTake;

	
	// HACKHACK Don't kill monsters in a script.  Let them break their scripts first
	if ( m_MonsterState == MONSTERSTATE_SCRIPT )
	{
		SetConditions( bits_COND_LIGHT_DAMAGE );
		return 0;
	}

	if ( pev->health <= 0 )
	{
		g_pevLastInflictor = pevInflictor;

		if ( bitsDamageType & DMG_ALWAYSGIB )
		{
			Killed( pevAttacker, GIB_ALWAYS );
		}
		// Wargon: Никогда не гибать если тип дамаги - DMG_SLASH. (1.1)
		else if ((bitsDamageType & DMG_NEVERGIB) || (bitsDamageType & DMG_SLASH))
		{
			Killed( pevAttacker, GIB_NEVER );
		}
		else
		{
			Killed( pevAttacker, GIB_NORMAL );
		}

		g_pevLastInflictor = NULL;

		return 0;
	}

	// react to the damage (get mad)
	if ( (pev->flags & FL_MONSTER) && !FNullEnt(pevAttacker) )
	{
		//LRC - new behaviours, for m_iPlayerReact.
		if (pevAttacker->flags & FL_CLIENT)
		{
			if (m_iPlayerReact == 2)
			{
				// just get angry.
				Remember( bits_MEMORY_PROVOKED );
			}
			else if (m_iPlayerReact == 3)
			{
				// try to decide whether it was deliberate... if I have an enemy, assume it was just crossfire.
				if ( m_hEnemy == NULL )
				{
					if ( (m_afMemory & bits_MEMORY_SUSPICIOUS) || UTIL_IsFacing( pevAttacker, pev->origin ) )
						Remember( bits_MEMORY_PROVOKED );
					else
						Remember( bits_MEMORY_SUSPICIOUS );
				}
			}
		}

		if ( pevAttacker->flags & (FL_MONSTER | FL_CLIENT) )
		{// only if the attack was a monster or client!
			
			// enemy's last known position is somewhere down the vector that the attack came from.
			if (pevInflictor)
			{
				if (m_hEnemy == NULL || pevInflictor == m_hEnemy->pev || !HasConditions(bits_COND_SEE_ENEMY))
				{
					m_vecEnemyLKP = pevInflictor->origin;
				}
			}
			else
			{
				m_vecEnemyLKP = pev->origin + ( g_vecAttackDir * 64 ); 
			}

			SetIdealYawToTargetAndUpdate( m_vecEnemyLKP );

			// add pain to the conditions 
			// !!!HACKHACK - fudged for now. Do we want to have a virtual function to determine what is light and 
			// heavy damage per monster class?
			if ( flDamage > 0 )
			{
				SetConditions(bits_COND_LIGHT_DAMAGE);
			}

			if ( flDamage >= 20 )
			{
				SetConditions(bits_COND_HEAVY_DAMAGE);
			}
		}
	}

	return 1;
}

//=========================================================
// DeadTakeDamage - takedamage function called when a monster's
// corpse is damaged.
//=========================================================
int CBaseMonster :: DeadTakeDamage( entvars_t *pevInflictor, entvars_t *pevAttacker, float flDamage, int bitsDamageType )
{
	Vector			vecDir;

	// grab the vector of the incoming attack. ( pretend that the inflictor is a little lower than it really is, so the body will tend to fly upward a bit).
	vecDir = Vector( 0, 0, 0 );
	if (!FNullEnt( pevInflictor ))
	{
		CBaseEntity *pInflictor = CBaseEntity :: Instance( pevInflictor );
		if (pInflictor)
		{
			vecDir = ( pInflictor->Center() - Vector ( 0, 0, 10 ) - Center() ).Normalize();
			vecDir = g_vecAttackDir = vecDir.Normalize();
		}
	}

	pev->frame = RANDOM_FLOAT ( 220, 225 );
	//pev->velocity = pev->velocity + vecDir * -DamageForce( flDamage );
	ResetSequenceInfo( );

#if 0// turn this back on when the bounding box issues are resolved.

	pev->flags &= ~FL_ONGROUND;
	pev->origin.z += 1;
	
	// let the damage scoot the corpse around a bit.
	if ( !FNullEnt(pevInflictor) && (pevAttacker->solid != SOLID_TRIGGER) )
	{
		pev->velocity = pev->velocity + vecDir * -DamageForce( flDamage );
	}

#endif
	// kill the corpse if enough damage was done to destroy the corpse and the damage is of a type that is allowed to destroy the corpse.
	if ( bitsDamageType & DMG_GIB_CORPSE )
	{
		if ( pev->health <= flDamage )
		{
			pev->health = -50;
			Killed( pevAttacker, GIB_ALWAYS );
			return 0;
		}
		// Accumulate corpse gibbing damage, so you can gib with multiple hits
		pev->health -= flDamage * 0.1;
	}
	
	return 1;
}

float CBaseMonster :: DamageForce( float damage )
{ 
	float force = damage * ((32 * 32 * 72.0) / (pev->size.x * pev->size.y * pev->size.z)) * 5;
	
	if ( force > 1000.0) 
	{
		force = 1000.0;
	}

	return force;
}

//
// RadiusDamage - this entity is exploding, or otherwise needs to inflict damage upon entities within a certain range.
// 
// only damage ents that can clearly be seen by the explosion!

void RadiusDamage( Vector vecSrc, entvars_t *pevInflictor, entvars_t *pevAttacker, float flDamage, float flRadius, int iClassIgnore, int bitsDamageType )
{
	CBaseEntity *pEntity = NULL;
	TraceResult	tr;
	float		flAdjustedDamage, falloff;
	Vector		vecSpot;

	if ( flRadius )
		falloff = flDamage / flRadius;
	else
		falloff = 1.0;

	int bInWater = (UTIL_PointContents ( vecSrc ) == CONTENTS_WATER);

	vecSrc.z += 1;// in case grenade is lying on the ground

	if ( !pevAttacker )
		pevAttacker = pevInflictor;

	// iterate on all entities in the vicinity.
	while ((pEntity = UTIL_FindEntityInSphere( pEntity, vecSrc, flRadius )) != NULL)
	{
		if ( pEntity->pev->takedamage != DAMAGE_NO )
		{
			// buz: skip grenade damage from player's grenades to invincible monsters
			if ( pEntity->pev->spawnflags & SF_MONSTER_INVINCIBLE )
			{
				CBaseEntity *pEnt = CBaseEntity::Instance( pevAttacker );
				if (pEnt->IsPlayer())
					continue;
			}

			// UNDONE: this should check a damage mask, not an ignore
			if ( iClassIgnore != CLASS_NONE && pEntity->Classify() == iClassIgnore )
			{// houndeyes don't hurt other houndeyes with their attack
				continue;
			}

			// blast's don't tavel into or out of water
			if (bInWater && pEntity->pev->waterlevel == 0)
				continue;
			if (!bInWater && pEntity->pev->waterlevel == 3)
				continue;

			vecSpot = pEntity->BodyTarget( vecSrc );
			
			UTIL_TraceLine ( vecSrc, vecSpot, dont_ignore_monsters, ENT(pevInflictor), &tr );

			if ( tr.flFraction == 1.0 || tr.pHit == pEntity->edict() )
			{// the explosion can 'see' this entity, so hurt them!
				if (tr.fStartSolid)
				{
					// if we're stuck inside them, fixup the position and distance
					tr.vecEndPos = vecSrc;
					tr.flFraction = 0.0;
				}
				
				// decrease damage for an ent that's farther from the bomb.
				flAdjustedDamage = ( vecSrc - tr.vecEndPos ).Length() * falloff;
				flAdjustedDamage = flDamage - flAdjustedDamage;
			
				if ( flAdjustedDamage < 0 )
				{
					flAdjustedDamage = 0;
				}
			
				// ALERT( at_console, "hit %s\n", STRING( pEntity->pev->classname ) );
				if (tr.flFraction != 1.0)
				{
					ClearMultiDamage( );
					pEntity->TraceAttack( pevInflictor, flAdjustedDamage, (tr.vecEndPos - vecSrc).Normalize( ), &tr, bitsDamageType );
					ApplyMultiDamage( pevInflictor, pevAttacker );
				}
				else
				{
					pEntity->TakeDamage ( pevInflictor, pevAttacker, flAdjustedDamage, bitsDamageType );
				}
			}
		}
	}
}

void CBaseMonster :: RadiusDamage(entvars_t* pevInflictor, entvars_t*	pevAttacker, float flDamage, int iClassIgnore, int bitsDamageType )
{
	::RadiusDamage( pev->origin, pevInflictor, pevAttacker, flDamage, flDamage * 2.5, iClassIgnore, bitsDamageType );
}


void CBaseMonster :: RadiusDamage( Vector vecSrc, entvars_t *pevInflictor, entvars_t *pevAttacker, float flDamage, int iClassIgnore, int bitsDamageType )
{
	::RadiusDamage( vecSrc, pevInflictor, pevAttacker, flDamage, flDamage * 2.5, iClassIgnore, bitsDamageType );
}

//=========================================================
// CheckTraceHullAttack - expects a length to trace, amount 
// of damage to do, and damage type. Returns a pointer to
// the damaged entity in case the monster wishes to do
// other stuff to the victim (punchangle, etc)
//
// Used for many contact-range melee attacks. Bites, claws, etc.
//=========================================================
CBaseEntity* CBaseMonster :: CheckTraceHullAttack( float flDist, int iDamage, int iDmgType )
{
	TraceResult tr;

	if (IsPlayer())
		UTIL_MakeVectors( pev->angles );
	else
		UTIL_MakeAimVectors( pev->angles );

	Vector vecStart = pev->origin;
	vecStart.z += pev->size.z * 0.5;
	Vector vecEnd = vecStart + (gpGlobals->v_forward * flDist );

	UTIL_TraceHull( vecStart, vecEnd, dont_ignore_monsters, head_hull, ENT(pev), &tr );
	
	if ( tr.pHit )
	{
		CBaseEntity *pEntity = CBaseEntity::Instance( tr.pHit );

		if ( iDamage > 0 )
		{
			pEntity->TakeDamage( pev, pev, iDamage, iDmgType );
		}

		return pEntity;
	}

	return NULL;
}


//=========================================================
// FInViewCone - returns true is the passed ent is in
// the caller's forward view cone. The dot product is performed
// in 2d, making the view cone infinitely tall. 
//=========================================================
BOOL CBaseMonster :: FInViewCone ( CBaseEntity *pEntity )
{
	Vector2D	vec2LOS;
	float	flDot;

	UTIL_MakeVectors ( pev->angles );
	
	vec2LOS = ( pEntity->pev->origin - pev->origin ).Make2D();
	vec2LOS = vec2LOS.Normalize();

	flDot = DotProduct (vec2LOS , gpGlobals->v_forward.Make2D() );

	if ( flDot > m_flFieldOfView )
	{
		return TRUE;
	}
	else
	{
		return FALSE;
	}
}

//=========================================================
// FInViewCone - returns true is the passed vector is in
// the caller's forward view cone. The dot product is performed
// in 2d, making the view cone infinitely tall. 
//=========================================================
BOOL CBaseMonster :: FInViewCone ( Vector *pOrigin )
{
	Vector2D	vec2LOS;
	float		flDot;

	UTIL_MakeVectors ( pev->angles );
	
	vec2LOS = ( *pOrigin - pev->origin ).Make2D();
	vec2LOS = vec2LOS.Normalize();

	flDot = DotProduct (vec2LOS , gpGlobals->v_forward.Make2D() );

	if ( flDot > m_flFieldOfView )
	{
		return TRUE;
	}
	else
	{
		return FALSE;
	}
}

//=========================================================
// FVisible - returns true if a line can be traced from
// the caller's eyes to the target
//=========================================================
BOOL CBaseEntity :: FVisible ( CBaseEntity *pEntity )
{
	TraceResult tr;
	Vector		vecLookerOrigin;
	Vector		vecTargetOrigin;
	
	if (FBitSet( pEntity->pev->flags, FL_NOTARGET ))
		return FALSE;

	// don't look through water
	if ((pev->waterlevel != 3 && pEntity->pev->waterlevel == 3) 
		|| (pev->waterlevel == 3 && pEntity->pev->waterlevel == 0))
		return FALSE;

	vecLookerOrigin = pev->origin + pev->view_ofs;//look through the caller's 'eyes'
	vecTargetOrigin = pEntity->EyePosition();

	UTIL_TraceLine(vecLookerOrigin, vecTargetOrigin, ignore_monsters, ignore_glass, ENT(pev)/*pentIgnore*/, &tr);
	
	if (tr.flFraction != 1.0 && tr.pHit != ENT(pEntity->pev)) //LRC - added so that monsters can "see" some bsp objects
	{
	//	ALERT(at_console, "can't see \"%s\"\n", STRING(pEntity->pev->classname));
		return FALSE;// Line of sight is not established
	}
	else
	{
	//	ALERT(at_console, "Seen ok\n");
		return TRUE;// line of sight is valid.
	}
}

//=========================================================
// FVisible - returns true if a line can be traced from
// the caller's eyes to the target vector
//=========================================================
BOOL CBaseEntity :: FVisible ( const Vector &vecOrigin )
{
	TraceResult tr;
	Vector		vecLookerOrigin;
	
	vecLookerOrigin = EyePosition();//look through the caller's 'eyes'

	UTIL_TraceLine(vecLookerOrigin, vecOrigin, ignore_monsters, ignore_glass, ENT(pev)/*pentIgnore*/, &tr);
	
	if (tr.flFraction != 1.0)
	{
		return FALSE;// Line of sight is not established
	}
	else
	{
		return TRUE;// line of sight is valid.
	}
}

/*
================
TraceAttack
================
*/
void CBaseEntity::TraceAttack(entvars_t *pevAttacker, float flDamage, Vector vecDir, TraceResult *ptr, int bitsDamageType)
{
	Vector vecOrigin = ptr->vecEndPos - vecDir * 4;

	if ( pev->takedamage )
	{
		AddMultiDamage( pevAttacker, this, flDamage, bitsDamageType );

		int blood = BloodColor();
		
		if ( blood != DONT_BLEED )
		{
			SpawnBlood(vecOrigin, blood, flDamage);// a little surface blood.
			TraceBleed( flDamage, vecDir, ptr, bitsDamageType );
		}
	}
}


/*
//=========================================================
// TraceAttack
//=========================================================
void CBaseMonster::TraceAttack(entvars_t *pevAttacker, float flDamage, Vector vecDir, TraceResult *ptr, int bitsDamageType)
{
	Vector vecOrigin = ptr->vecEndPos - vecDir * 4;

	ALERT ( at_console, "%d\n", ptr->iHitgroup );


	if ( pev->takedamage )
	{
		AddMultiDamage( pevAttacker, this, flDamage, bitsDamageType );

		int blood = BloodColor();
		
		if ( blood != DONT_BLEED )
		{
			SpawnBlood(vecOrigin, blood, flDamage);// a little surface blood.
		}
	}
}
*/

BOOL CBaseMonster :: AllowDecal( entvars_t *pevAttacker )
{
	if ( pev->takedamage )
	{
		if ( pev->spawnflags & SF_MONSTER_INVINCIBLE )
		{
			// check for player
			CBaseEntity *pEnt = CBaseEntity::Instance( pevAttacker );
			if (pEnt->IsPlayer())
			{
				return FALSE;
			}

			// check for owner (it may be grenade, thrown by player)
			if (pevAttacker->owner)
			{
				pEnt = CBaseEntity::Instance( pevAttacker->owner );
				if (pEnt->IsPlayer())
				{
					return FALSE;
				}
			}
		}

		return TRUE;
	}

	return FALSE;
}

//=========================================================
// TraceAttack
//=========================================================
void CBaseMonster :: TraceAttack( entvars_t *pevAttacker, float flDamage, Vector vecDir, TraceResult *ptr, int bitsDamageType)
{
	if ( pev->takedamage )
	{
		if ( pev->spawnflags & SF_MONSTER_INVINCIBLE )
		{
		//	ALERT(at_console, "yes im incvincible\n");
			// check for player
			CBaseEntity *pEnt = CBaseEntity::Instance( pevAttacker );
			if (pEnt->IsPlayer())
			{
			//	ALERT(at_console, "ent is player\n");
				return;
			}

			// check for owner (it may be grenade, thrown by player)
			if (pevAttacker->owner)
			{
				pEnt = CBaseEntity::Instance( pevAttacker->owner );
				if (pEnt->IsPlayer())
				{
				//	ALERT(at_console, "owner is player\n");
					return;
				}
			}
		}

		m_LastHitGroup = ptr->iHitgroup;
		TraceBleed( flDamage, vecDir, ptr, bitsDamageType );

		TraceResult btr; // Wargon: Переменная для трейса декали мозгов от хедшотов.

		switch ( ptr->iHitgroup )
		{
		case HITGROUP_GENERIC:
			break;
		case HITGROUP_HEAD:
			// Wargon: Декаль мозгов от хедшотов.
			UTIL_TraceLine( ptr->vecEndPos, ptr->vecEndPos + vecDir * 172, ignore_monsters, ENT(pev), &btr );
			UTIL_TraceCustomDecal( &btr, "brains", RANDOM_FLOAT( 0.0f, 360.0f ));

			// buz: more blood in the head!!! let the brains fly out and smash on ground, muahahaha!!
			SpawnBlood(ptr->vecEndPos, BloodColor(), flDamage * 4);
			flDamage *= gSkillData.monHead;
			break;
		case HITGROUP_CHEST:
			flDamage *= gSkillData.monChest;
			break;
		case HITGROUP_STOMACH:
			flDamage *= gSkillData.monStomach;
			break;
		case HITGROUP_LEFTARM:
		case HITGROUP_RIGHTARM:
			flDamage *= gSkillData.monArm;
			break;
		case HITGROUP_LEFTLEG:
		case HITGROUP_RIGHTLEG:
			flDamage *= gSkillData.monLeg;
			break;
		default:
			break;
		}

		SpawnBlood(ptr->vecEndPos, BloodColor(), flDamage * 2); // Wargon: Побольше крови.
		AddMultiDamage( pevAttacker, this, flDamage, bitsDamageType );
	}
}

/*
================
FireBullets

Go to the trouble of combining multiple pellets into a single damage call.

This version is used by Monsters.
================
*/
void CBaseEntity :: FireBullets( ULONG cShots, Vector vecSrc, Vector vecDirShooting, Vector vecSpread, float flDistance, int iBulletType, float flDamage, entvars_t *pevAttacker )
{
	Vector vecRight = gpGlobals->v_right;
	Vector vecUp = gpGlobals->v_up;
	TraceResult tr;

	if ( pevAttacker == NULL )
		pevAttacker = pev;  // the default attacker is ourselves

	ClearMultiDamage();
	gMultiDamage.type = DMG_BULLET | DMG_NEVERGIB;

	for( ULONG iShot = 1; iShot <= cShots; iShot++ )
	{
		// get circular gaussian spread
		float x, y, z;
		do {
			x = RANDOM_FLOAT( -0.5f, 0.5f ) + RANDOM_FLOAT( -0.5f, 0.5f );
			y = RANDOM_FLOAT( -0.5f, 0.5f ) + RANDOM_FLOAT( -0.5f, 0.5f );
			z = x * x + y * y;
		} while( z > 1.0f );

		Vector vecDir = vecDirShooting + x * vecSpread.x * vecRight + y * vecSpread.y * vecUp;
		Vector vecEnd;

		vecEnd = vecSrc + vecDir * flDistance;
		UTIL_TraceLine( vecSrc, vecEnd, dont_ignore_monsters, ENT( pev ), &tr );

		// do damage, paint decals
		if ( tr.flFraction != 1.0f )
		{
			CBaseEntity *pEntity = CBaseEntity :: Instance( tr.pHit );

			switch( iBulletType )
			{
			case BULLET_NORMAL:
			case BULLET_BUCKSHOT:
				pEntity->TraceAttack( pevAttacker, flDamage, vecDir, &tr, DMG_BULLET|DMG_NEVERGIB );
				TEXTURETYPE_PlaySound( &tr, vecSrc, vecEnd, iBulletType );
				if( pEntity->AllowDecal( pevAttacker ))
					DecalGunshot( &tr, iBulletType, vecSrc );
				break;
			}
		}

		// make bullet trails
		UTIL_BubbleTrail( vecSrc, tr.vecEndPos, ( flDistance * tr.flFraction ) / 64.0f );
	}

	ApplyMultiDamage( pev, pevAttacker );
}

//Water splash
extern int    gmsgWaterSplash;

void CBaseEntity::FireBulletsWater( Vector vecSrc, Vector vecEnd, float ScaleSplash1, float ScaleSplash2 )
{
    if( !( POINT_CONTENTS( vecEnd ) == CONTENTS_WATER && POINT_CONTENTS( vecSrc ) != CONTENTS_WATER ) )
        return;
    
    float x = vecEnd.x - vecSrc.x;
    float y = vecEnd.y - vecSrc.y;
    float z = vecEnd.z - vecSrc.z;
    float len = Vector( vecEnd - vecSrc).Length();
    
    Vector vecTemp = ( vecEnd + vecSrc ) / 2;
    while( len >= 1 )
    {
        if( POINT_CONTENTS( vecTemp ) == CONTENTS_WATER )
            vecEnd = vecTemp;
        else
            vecSrc = vecTemp;
        vecTemp = ( vecEnd + vecSrc ) / 2;
        len = Vector( vecEnd - vecSrc).Length();
    }
    
    if( len <= 1 )
    {
        MESSAGE_BEGIN(MSG_ALL, gmsgWaterSplash);
        WRITE_COORD( vecTemp.x );
        WRITE_COORD( vecTemp.y );
        WRITE_COORD( vecTemp.z );
        WRITE_COORD( ScaleSplash1 );
        WRITE_COORD( ScaleSplash2 );
        MESSAGE_END();

         switch( RANDOM_LONG( 1, 3 ) )
        {
            case 1:
                UTIL_EmitAmbientSound( ENT(0), vecTemp, "player/water_splash1.wav", 1, ATTN_NORM, 0, 100 );
            break;
            case 2:
                UTIL_EmitAmbientSound( ENT(0), vecTemp, "player/water_splash2.wav", 1, ATTN_NORM, 0, 100 );
            break;
            case 3:
                UTIL_EmitAmbientSound( ENT(0), vecTemp, "player/water_splash3.wav", 1, ATTN_NORM, 0, 100 );
            break;
        }

    }
    else
    {
        if( POINT_CONTENTS( vecTemp ) == CONTENTS_WATER )
            FireBulletsWater( vecSrc, vecTemp, ScaleSplash1, ScaleSplash2 );
        else
            FireBulletsWater( vecTemp, vecEnd, ScaleSplash1, ScaleSplash2 );
    }
}

/*
================
FireBullets

Go to the trouble of combining multiple pellets into a single damage call.

This version is used by Players, uses the random seed generator to sync client and server side shots.
================
*/
Vector CBaseEntity :: FireBulletsPlayer( ULONG cShots, Vector vecSrc, Vector vecDirShooting, Vector vecSpread, float flDistance, float flDamage, entvars_t *pevAttacker, int shared_rand )
{
	TraceResult tr;
	Vector vecRight = gpGlobals->v_right;
	Vector vecUp = gpGlobals->v_up;
	float x, y, z;

	if ( pevAttacker == NULL )
		pevAttacker = pev;  // the default attacker is ourselves    

	ClearMultiDamage();
	gMultiDamage.type = DMG_BULLET | DMG_NEVERGIB;

	for ( ULONG iShot = 1; iShot <= cShots; iShot++ )
	{
		//Use player's random seed.
		// get circular gaussian spread
		x = UTIL_SharedRandomFloat( shared_rand + iShot, -0.5, 0.5 ) + UTIL_SharedRandomFloat( shared_rand + ( 1 + iShot ) , -0.5, 0.5 );
		y = UTIL_SharedRandomFloat( shared_rand + ( 2 + iShot ), -0.5, 0.5 ) + UTIL_SharedRandomFloat( shared_rand + ( 3 + iShot ), -0.5, 0.5 );
		z = x * x + y * y;

		Vector vecDir = vecDirShooting + x * vecSpread.x * vecRight + y * vecSpread.y * vecUp;
		Vector vecEnd;

		vecEnd = vecSrc + vecDir * flDistance;
		UTIL_TraceLine( vecSrc, vecEnd, dont_ignore_monsters, ENT(pev), &tr );

		// do damage, paint decals
		if( tr.flFraction != 1.0 )
		{
			CBaseEntity *pEntity = CBaseEntity::Instance( tr.pHit );
			pEntity->TraceAttack( pevAttacker, flDamage, vecDir, &tr, DMG_BULLET ); 
			if( pEntity->AllowDecal( pevAttacker ))
				DecalGunshot( &tr, BULLET_NORMAL, vecSrc, true );
		}

		// make bullet trails
		UTIL_BubbleTrail( vecSrc, tr.vecEndPos, (flDistance * tr.flFraction) / 64.0 );
		FireBulletsWater( vecSrc, tr.vecEndPos, 0.15f, 0.15f );
	}

	ApplyMultiDamage( pev, pevAttacker );

	return Vector( x * vecSpread.x, y * vecSpread.y, 0.0f );
}

void CBaseEntity :: TraceBleed( float flDamage, Vector vecDir, TraceResult *ptr, int bitsDamageType )
{
	if (BloodColor() == DONT_BLEED)
		return;
	
	if (flDamage == 0)
		return;

	if (! (bitsDamageType & (DMG_CRUSH | DMG_BULLET | DMG_SLASH | DMG_BLAST | DMG_CLUB | DMG_MORTAR)))
		return;
	
	// make blood decal on the wall! 
	TraceResult Bloodtr;
	Vector vecTraceDir; 
	float flNoise;
	int cCount;
	int i;

/*
	if ( !IsAlive() )
	{
		// dealing with a dead monster. 
		if ( pev->max_health <= 0 )
		{
			// no blood decal for a monster that has already decalled its limit.
			return; 
		}
		else
		{
			pev->max_health--;
		}
	}
*/

	if (flDamage < 10)
	{
		flNoise = 0.1;
		cCount = 1;
	}
	else if (flDamage < 25)
	{
		flNoise = 0.2;
		cCount = 2;
	}
	else
	{
		flNoise = 0.3;
		cCount = 4;
	}

	for ( i = 0 ; i < cCount ; i++ )
	{
		vecTraceDir = vecDir * -1;// trace in the opposite direction the shot came from (the direction the shot is going)

		vecTraceDir.x += RANDOM_FLOAT( -flNoise, flNoise );
		vecTraceDir.y += RANDOM_FLOAT( -flNoise, flNoise );
		vecTraceDir.z += RANDOM_FLOAT( -flNoise, flNoise );

		UTIL_TraceLine( ptr->vecEndPos, ptr->vecEndPos + vecTraceDir * -172, ignore_monsters, ENT(pev), &Bloodtr);

		if ( Bloodtr.flFraction != 1.0 )
		{
			UTIL_BloodDecalTrace( &Bloodtr, BloodColor() );
		}
	}
}

//=========================================================
//=========================================================
void CBaseMonster :: MakeDamageBloodDecal ( int cCount, float flNoise, TraceResult *ptr, const Vector &vecDir )
{
	// make blood decal on the wall! 
	TraceResult Bloodtr;
	Vector vecTraceDir; 
	int i;

	if ( !IsAlive() )
	{
		// dealing with a dead monster. 
		if ( pev->max_health <= 0 )
		{
			// no blood decal for a monster that has already decalled its limit.
			return; 
		}
		else
		{
			pev->max_health--;
		}
	}

	for ( i = 0 ; i < cCount ; i++ )
	{
		vecTraceDir = vecDir;

		vecTraceDir.x += RANDOM_FLOAT( -flNoise, flNoise );
		vecTraceDir.y += RANDOM_FLOAT( -flNoise, flNoise );
		vecTraceDir.z += RANDOM_FLOAT( -flNoise, flNoise );

		UTIL_TraceLine( ptr->vecEndPos, ptr->vecEndPos + vecTraceDir * 172, ignore_monsters, ENT(pev), &Bloodtr);

/*
		MESSAGE_BEGIN( MSG_BROADCAST, SVC_TEMPENTITY );
			WRITE_BYTE( TE_SHOWLINE);
			WRITE_COORD( ptr->vecEndPos.x );
			WRITE_COORD( ptr->vecEndPos.y );
			WRITE_COORD( ptr->vecEndPos.z );
			
			WRITE_COORD( Bloodtr.vecEndPos.x );
			WRITE_COORD( Bloodtr.vecEndPos.y );
			WRITE_COORD( Bloodtr.vecEndPos.z );
		MESSAGE_END();
*/

		if ( Bloodtr.flFraction != 1.0 )
		{
			UTIL_BloodDecalTrace( &Bloodtr, BloodColor() );
		}
	}
}