gzdoom/src/g_heretic/a_ironlich.cpp

/*
#include "actor.h"
#include "info.h"
#include "m_random.h"
#include "s_sound.h"
#include "p_local.h"
#include "p_enemy.h"
#include "a_action.h"
#include "gstrings.h"
#include "thingdef/thingdef.h"
#include "g_level.h"
*/

static FRandom pr_foo ("WhirlwindDamage");
static FRandom pr_atk ("LichAttack");
static FRandom pr_seek ("WhirlwindSeek");

class AWhirlwind : public AActor
{
	DECLARE_CLASS (AWhirlwind, AActor)
public:
	int DoSpecialDamage (AActor *target, int damage, FName damagetype);
};

IMPLEMENT_CLASS(AWhirlwind)

int AWhirlwind::DoSpecialDamage (AActor *target, int damage, FName damagetype)
{
	int randVal;

	if (!(target->flags7 & MF7_DONTTHRUST))
	{
		target->angle += pr_foo.Random2() << 20;
		target->vel.x += pr_foo.Random2() << 10;
		target->vel.y += pr_foo.Random2() << 10;
	}

	if ((level.time & 16) && !(target->flags2 & MF2_BOSS) && !(target->flags7 & MF7_DONTTHRUST))
	{
		randVal = pr_foo();
		if (randVal > 160)
		{
			randVal = 160;
		}
		target->vel.z += randVal << 11;
		if (target->vel.z > 12*FRACUNIT)
		{
			target->vel.z = 12*FRACUNIT;
		}
	}
	if (!(level.time & 7))
	{
		P_DamageMobj (target, NULL, this->target, 3, NAME_Melee);
	}
	return -1;
}

//----------------------------------------------------------------------------
//
// PROC A_LichAttack
//
//----------------------------------------------------------------------------

DEFINE_ACTION_FUNCTION(AActor, A_LichAttack)
{
	PARAM_ACTION_PROLOGUE;

	int i;
	AActor *fire;
	AActor *baseFire;
	AActor *mo;
	AActor *target;
	int randAttack;
	static const int atkResolve1[] = { 50, 150 };
	static const int atkResolve2[] = { 150, 200 };
	int dist;

	// Ice ball		(close 20% : far 60%)
	// Fire column	(close 40% : far 20%)
	// Whirlwind	(close 40% : far 20%)
	// Distance threshold = 8 cells

	target = self->target;
	if (target == NULL)
	{
		return 0;
	}
	A_FaceTarget (self);
	if (self->CheckMeleeRange ())
	{
		int damage = pr_atk.HitDice (6);
		int newdam = P_DamageMobj (target, self, self, damage, NAME_Melee);
		P_TraceBleed (newdam > 0 ? newdam : damage, target, self);
		return 0;
	}
	dist = self->AproxDistance (target) > 8*64*FRACUNIT;
	randAttack = pr_atk ();
	if (randAttack < atkResolve1[dist])
	{ // Ice ball
		P_SpawnMissile (self, target, PClass::FindActor("HeadFX1"));
		S_Sound (self, CHAN_BODY, "ironlich/attack2", 1, ATTN_NORM);
	}
	else if (randAttack < atkResolve2[dist])
	{ // Fire column
		baseFire = P_SpawnMissile (self, target, PClass::FindActor("HeadFX3"));
		if (baseFire != NULL)
		{
			baseFire->SetState (baseFire->FindState("NoGrow"));
			for (i = 0; i < 5; i++)
			{
				fire = Spawn("HeadFX3", baseFire->Pos(), ALLOW_REPLACE);
				if (i == 0)
				{
					S_Sound (self, CHAN_BODY, "ironlich/attack1", 1, ATTN_NORM);
				}
				fire->target = baseFire->target;
				fire->angle = baseFire->angle;
				fire->vel.x = baseFire->vel.x;
				fire->vel.y = baseFire->vel.y;
				fire->vel.z = baseFire->vel.z;
				fire->Damage = NULL;
				fire->health = (i+1) * 2;
				P_CheckMissileSpawn (fire, self->radius);
			}
		}
	}
	else
	{ // Whirlwind
		mo = P_SpawnMissile (self, target, RUNTIME_CLASS(AWhirlwind));
		if (mo != NULL)
		{
			mo->AddZ(-32*FRACUNIT, false);
			mo->tracer = target;
			mo->health = 20*TICRATE; // Duration
			S_Sound (self, CHAN_BODY, "ironlich/attack3", 1, ATTN_NORM);
		}
	}
	return 0;
}

//----------------------------------------------------------------------------
//
// PROC A_WhirlwindSeek
//
//----------------------------------------------------------------------------

DEFINE_ACTION_FUNCTION(AActor, A_WhirlwindSeek)
{
	PARAM_ACTION_PROLOGUE;

	self->health -= 3;
	if (self->health < 0)
	{
		self->vel.x = self->vel.y = self->vel.z = 0;
		self->SetState (self->FindState(NAME_Death));
		self->flags &= ~MF_MISSILE;
		return 0;
	}
	if ((self->threshold -= 3) < 0)
	{
		self->threshold = 58 + (pr_seek() & 31);
		S_Sound (self, CHAN_BODY, "ironlich/attack3", 1, ATTN_NORM);
	}
	if (self->tracer && self->tracer->flags&MF_SHADOW)
	{
		return 0;
	}
	P_SeekerMissile (self, ANGLE_1*10, ANGLE_1*30);
	return 0;
}

//----------------------------------------------------------------------------
//
// PROC A_LichIceImpact
//
//----------------------------------------------------------------------------

DEFINE_ACTION_FUNCTION(AActor, A_LichIceImpact)
{
	PARAM_ACTION_PROLOGUE;

	unsigned int i;
	angle_t angle;
	AActor *shard;

	for (i = 0; i < 8; i++)
	{
		shard = Spawn("HeadFX2", self->Pos(), ALLOW_REPLACE);
		angle = i*ANG45;
		shard->target = self->target;
		shard->angle = angle;
		angle >>= ANGLETOFINESHIFT;
		shard->vel.x = FixedMul (shard->Speed, finecosine[angle]);
		shard->vel.y = FixedMul (shard->Speed, finesine[angle]);
		shard->vel.z = -FRACUNIT*6/10;
		P_CheckMissileSpawn (shard, self->radius);
	}
	return 0;
}

//----------------------------------------------------------------------------
//
// PROC A_LichFireGrow
//
//----------------------------------------------------------------------------

DEFINE_ACTION_FUNCTION(AActor, A_LichFireGrow)
{
	PARAM_ACTION_PROLOGUE;

	self->health--;
	self->AddZ(9*FRACUNIT);
	if (self->health == 0)
	{
		self->Damage = self->GetDefault()->Damage;
		self->SetState (self->FindState("NoGrow"));
	}
	return 0;
}