halflife-photomode/dlls/combat.cpp

/***
*
*	Copyright (c) 1996-2001, 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"

extern Vector VecBModelOrigin(entvars_t* pevBModel);

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


// HACKHACK -- The gib velocity equations don't work
void CGib::LimitVelocity()
{
	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)
{
	CGib* pGib = GetClassPtr((CGib*)NULL);

	if (g_Language == LANGUAGE_GERMAN)
	{
		pGib->Spawn("models/germangibs.mdl"); // throw one head
		pGib->pev->body = 0;
	}
	else
	{
		pGib->Spawn("models/hgibs.mdl"); // 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, bool human)
{
	int cSplat;

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

		if (g_Language == LANGUAGE_GERMAN)
		{
			pGib->Spawn("models/germangibs.mdl");
			pGib->pev->body = RANDOM_LONG(0, GERMAN_GIB_COUNT - 1);
		}
		else
		{
			if (human)
			{
				// human pieces
				pGib->Spawn("models/hgibs.mdl");
				pGib->pev->body = RANDOM_LONG(1, HUMAN_GIB_COUNT - 1); // start at one to avoid throwing random amounts of skulls (0th gib)
			}
			else
			{
				// aliens
				pGib->Spawn("models/agibs.mdl");
				pGib->pev->body = RANDOM_LONG(0, ALIEN_GIB_COUNT - 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();
	}
}


bool CBaseMonster::HasHumanGibs()
{
	int myClass = Classify();

	if (myClass == CLASS_HUMAN_MILITARY ||
		myClass == CLASS_PLAYER_ALLY ||
		myClass == CLASS_HUMAN_PASSIVE ||
		myClass == CLASS_PLAYER)

		return true;

	return false;
}


bool CBaseMonster::HasAlienGibs()
{
	int myClass = Classify();

	if (myClass == CLASS_ALIEN_MILITARY ||
		myClass == CLASS_ALIEN_MONSTER ||
		myClass == CLASS_ALIEN_PASSIVE ||
		myClass == CLASS_INSECT ||
		myClass == CLASS_ALIEN_PREDATOR ||
		myClass == CLASS_ALIEN_PREY)

		return true;

	return false;
}


void CBaseMonster::FadeMonster()
{
	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()
{
	TraceResult tr;
	bool gibbed = false;

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

	// only humans throw skulls !!!UNDONE - eventually monsters will have their own sets of gibs
	if (HasHumanGibs())
	{
		if (CVAR_GET_FLOAT("violence_hgibs") != 0) // Only the player will ever get here
		{
			CGib::SpawnHeadGib(pev);
			CGib::SpawnRandomGibs(pev, 4, true); // throw some human gibs.
		}
		gibbed = true;
	}
	else if (HasAlienGibs())
	{
		if (CVAR_GET_FLOAT("violence_agibs") != 0) // Should never get here, but someone might call it directly
		{
			CGib::SpawnRandomGibs(pev, 4, false); // Throw alien gibs
		}
		gibbed = true;
	}

	if (!IsPlayer())
	{
		if (gibbed)
		{
			// don't remove players!
			SetThink(&CBaseMonster::SUB_Remove);
			pev->nextthink = gpGlobals->time;
		}
		else
		{
			FadeMonster();
		}
	}
}

//=========================================================
// GetDeathActivity - determines the best type of death
// anim to play.
//=========================================================
Activity CBaseMonster::GetDeathActivity()
{
	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:
		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()
{
	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()
{
	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->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()
{
	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);
}


/*
============
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) != 0)
	{
		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()
{
	if (pev->rendermode == kRenderNormal)
	{
		pev->renderamt = 255;
		pev->rendermode = kRenderTransTexture;
	}

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

	pev->nextthink = gpGlobals->time + 0.1;
	SetThink(&CBaseEntity::SUB_FadeOut);
}

void CBaseEntity::SUB_FadeOut()
{
	if (pev->renderamt > 7)
	{
		pev->renderamt -= 7;
		pev->nextthink = gpGlobals->time + 0.1;
	}
	else
	{
		pev->renderamt = 0;
		pev->nextthink = gpGlobals->time + 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()
{
	if (!IsInWorld())
	{
		UTIL_Remove(this);
		return;
	}

	if (pev->velocity == g_vecZero)
	{
		SetThink(&CGib::SUB_StartFadeOut);
		pev->nextthink = gpGlobals->time + 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.
		pev->nextthink = gpGlobals->time + 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) != 0)
	{
		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 * V_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);
	pev->nextthink = gpGlobals->time + 10;

	if (!FClassnameIs(pOther->pev, "worldspawn"))
	{
		pev->nextthink = gpGlobals->time;
		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_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));

	pev->nextthink = gpGlobals->time + 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
bool CBaseMonster::TakeHealth(float flHealth, int bitsDamageType)
{
	if (0 == pev->takedamage)
		return false;

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

	if (0 == pev->takedamage)
		return false;

	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) != 0)
		{
			return false;
		}
	}

	// 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 false;
	}

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

		if ((bitsDamageType & DMG_ALWAYSGIB) != 0)
		{
			Killed(pevAttacker, GIB_ALWAYS);
		}
		else if ((bitsDamageType & DMG_NEVERGIB) != 0)
		{
			Killed(pevAttacker, GIB_NEVER);
		}
		else
		{
			Killed(pevAttacker, GIB_NORMAL);
		}

		g_pevLastInflictor = NULL;

		return false;
	}

	// react to the damage (get mad)
	if ((pev->flags & FL_MONSTER) != 0 && !FNullEnt(pevAttacker))
	{
		if ((pevAttacker->flags & (FL_MONSTER | FL_CLIENT)) != 0)
		{ // 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);
			}

			MakeIdealYaw(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 true;
}

//=========================================================
// DeadTakeDamage - takedamage function called when a monster's
// corpse is damaged.
//=========================================================
bool 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();
		}
	}

#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) != 0)
	{
		if (pev->health <= flDamage)
		{
			pev->health = -50;
			Killed(pevAttacker, GIB_ALWAYS);
			return false;
		}
		// Accumulate corpse gibbing damage, so you can gib with multiple hits
		pev->health -= flDamage * 0.1;
	}

	return true;
}


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 (0 != flRadius)
		falloff = flDamage / flRadius;
	else
		falloff = 1.0;

	const bool 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)
		{
			// 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 (0 != 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)
	{
		return false; // Line of sight is not established
	}
	else
	{
		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 (0 != 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.
		}
	}
}
*/

//=========================================================
// TraceAttack
//=========================================================
void CBaseMonster::TraceAttack(entvars_t* pevAttacker, float flDamage, Vector vecDir, TraceResult* ptr, int bitsDamageType)
{
	if (0 != pev->takedamage)
	{
		m_LastHitGroup = ptr->iHitgroup;

		switch (ptr->iHitgroup)
		{
		case HITGROUP_GENERIC:
			break;
		case HITGROUP_HEAD:
			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); // a little surface blood.
		TraceBleed(flDamage, vecDir, ptr, bitsDamageType);
		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(unsigned int cShots, Vector vecSrc, Vector vecDirShooting, Vector vecSpread, float flDistance, int iBulletType, int iTracerFreq, int iDamage, entvars_t* pevAttacker)
{
	static int tracerCount;
	TraceResult tr;
	Vector vecRight = gpGlobals->v_right;
	Vector vecUp = gpGlobals->v_up;

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

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

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

		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) /*pentIgnore*/, &tr);

		if (iTracerFreq != 0 && (tracerCount++ % iTracerFreq) == 0)
		{
			Vector vecTracerSrc;

			if (IsPlayer())
			{ // adjust tracer position for player
				vecTracerSrc = vecSrc + Vector(0, 0, -4) + gpGlobals->v_right * 2 + gpGlobals->v_forward * 16;
			}
			else
			{
				vecTracerSrc = vecSrc;
			}

			switch (iBulletType)
			{
			case BULLET_MONSTER_MP5:
			case BULLET_MONSTER_9MM:
			case BULLET_MONSTER_12MM:
			default:
				MESSAGE_BEGIN(MSG_PAS, SVC_TEMPENTITY, vecTracerSrc);
				WRITE_BYTE(TE_TRACER);
				WRITE_COORD(vecTracerSrc.x);
				WRITE_COORD(vecTracerSrc.y);
				WRITE_COORD(vecTracerSrc.z);
				WRITE_COORD(tr.vecEndPos.x);
				WRITE_COORD(tr.vecEndPos.y);
				WRITE_COORD(tr.vecEndPos.z);
				MESSAGE_END();
				break;
			}
		}
		// do damage, paint decals
		if (tr.flFraction != 1.0)
		{
			CBaseEntity* pEntity = CBaseEntity::Instance(tr.pHit);

			if (0 != iDamage)
			{
				pEntity->TraceAttack(pevAttacker, iDamage, vecDir, &tr, DMG_BULLET | ((iDamage > 16) ? DMG_ALWAYSGIB : DMG_NEVERGIB));

				TEXTURETYPE_PlaySound(&tr, vecSrc, vecEnd, iBulletType);
				DecalGunshot(&tr, iBulletType);
			}
			else
				switch (iBulletType)
				{
				case BULLET_PLAYER_BUCKSHOT:
					// make distance based!
					pEntity->TraceAttack(pevAttacker, gSkillData.plrDmgBuckshot, vecDir, &tr, DMG_BULLET);

					TEXTURETYPE_PlaySound(&tr, vecSrc, vecEnd, iBulletType);
					DecalGunshot(&tr, iBulletType);
					break;

				default:
				case BULLET_MONSTER_9MM:
					pEntity->TraceAttack(pevAttacker, gSkillData.monDmg9MM, vecDir, &tr, DMG_BULLET);

					TEXTURETYPE_PlaySound(&tr, vecSrc, vecEnd, iBulletType);
					DecalGunshot(&tr, iBulletType);

					break;

				case BULLET_MONSTER_MP5:
					pEntity->TraceAttack(pevAttacker, gSkillData.monDmgMP5, vecDir, &tr, DMG_BULLET);

					TEXTURETYPE_PlaySound(&tr, vecSrc, vecEnd, iBulletType);
					DecalGunshot(&tr, iBulletType);

					break;

				case BULLET_MONSTER_12MM:
					pEntity->TraceAttack(pevAttacker, gSkillData.monDmg12MM, vecDir, &tr, DMG_BULLET);
					TEXTURETYPE_PlaySound(&tr, vecSrc, vecEnd, iBulletType);
					DecalGunshot(&tr, iBulletType);
					break;

				case BULLET_NONE: // FIX
					pEntity->TraceAttack(pevAttacker, 50, vecDir, &tr, DMG_CLUB);
					TEXTURETYPE_PlaySound(&tr, vecSrc, vecEnd, iBulletType);
					// only decal glass
					if (!FNullEnt(tr.pHit) && VARS(tr.pHit)->rendermode != 0)
					{
						UTIL_DecalTrace(&tr, DECAL_GLASSBREAK1 + RANDOM_LONG(0, 2));
					}

					break;
				}
		}
		// make bullet trails
		UTIL_BubbleTrail(vecSrc, tr.vecEndPos, (flDistance * tr.flFraction) / 64.0);
	}
	ApplyMultiDamage(pev, pevAttacker);
}


/*
================
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(unsigned int cShots, Vector vecSrc, Vector vecDirShooting, Vector vecSpread, float flDistance, int iBulletType, int iTracerFreq, int iDamage, entvars_t* pevAttacker, int shared_rand)
{
	static int tracerCount;
	TraceResult tr;
	Vector vecRight = gpGlobals->v_right;
	Vector vecUp = gpGlobals->v_up;
	float x = 0, y = 0, z;

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

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

	for (unsigned int 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) /*pentIgnore*/, &tr);

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

			if (0 != iDamage)
			{
				pEntity->TraceAttack(pevAttacker, iDamage, vecDir, &tr, DMG_BULLET | ((iDamage > 16) ? DMG_ALWAYSGIB : DMG_NEVERGIB));

				TEXTURETYPE_PlaySound(&tr, vecSrc, vecEnd, iBulletType);
				DecalGunshot(&tr, iBulletType);
			}
			else
				switch (iBulletType)
				{
				default:
				case BULLET_PLAYER_9MM:
					pEntity->TraceAttack(pevAttacker, gSkillData.plrDmg9MM, vecDir, &tr, DMG_BULLET);
					break;

				case BULLET_PLAYER_MP5:
					pEntity->TraceAttack(pevAttacker, gSkillData.plrDmgMP5, vecDir, &tr, DMG_BULLET);
					break;

				case BULLET_PLAYER_BUCKSHOT:
					// make distance based!
					pEntity->TraceAttack(pevAttacker, gSkillData.plrDmgBuckshot, vecDir, &tr, DMG_BULLET);
					break;

				case BULLET_PLAYER_357:
					pEntity->TraceAttack(pevAttacker, gSkillData.plrDmg357, vecDir, &tr, DMG_BULLET);
					break;

				case BULLET_NONE: // FIX
					pEntity->TraceAttack(pevAttacker, 50, vecDir, &tr, DMG_CLUB);
					TEXTURETYPE_PlaySound(&tr, vecSrc, vecEnd, iBulletType);
					// only decal glass
					if (!FNullEnt(tr.pHit) && VARS(tr.pHit)->rendermode != 0)
					{
						UTIL_DecalTrace(&tr, DECAL_GLASSBREAK1 + RANDOM_LONG(0, 2));
					}

					break;
				}
		}
		// make bullet trails
		UTIL_BubbleTrail(vecSrc, tr.vecEndPos, (flDistance * tr.flFraction) / 64.0);
	}
	ApplyMultiDamage(pev, pevAttacker);

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

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)) == 0)
		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());
		}
	}
}