g_items.c

Quake 2 Source code for students by Theerthan You can also download from idsoftwares.com

/*
Copyright (C) 1997-2001 Id Software, Inc.

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  

See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

*/
#include "g_local.h"


qboolean	Pickup_Weapon (edict_t *ent, edict_t *other);
void		Use_Weapon (edict_t *ent, gitem_t *inv);
void		Drop_Weapon (edict_t *ent, gitem_t *inv);

void Weapon_Blaster (edict_t *ent);
void Weapon_Shotgun (edict_t *ent);
void Weapon_SuperShotgun (edict_t *ent);
void Weapon_Machinegun (edict_t *ent);
void Weapon_Chaingun (edict_t *ent);
void Weapon_HyperBlaster (edict_t *ent);
void Weapon_RocketLauncher (edict_t *ent);
void Weapon_Grenade (edict_t *ent);
void Weapon_GrenadeLauncher (edict_t *ent);
void Weapon_Railgun (edict_t *ent);
void Weapon_BFG (edict_t *ent);

gitem_armor_t jacketarmor_info	= { 25,  50, .30, .00, ARMOR_JACKET};
gitem_armor_t combatarmor_info	= { 50, 100, .60, .30, ARMOR_COMBAT};
gitem_armor_t bodyarmor_info	= {100, 200, .80, .60, ARMOR_BODY};

static int	jacket_armor_index;
static int	combat_armor_index;
static int	body_armor_index;
static int	power_screen_index;
static int	power_shield_index;

#define HEALTH_IGNORE_MAX	1
#define HEALTH_TIMED		2

void Use_Quad (edict_t *ent, gitem_t *item);
static int	quad_drop_timeout_hack;

//======================================================================

/*
===============
GetItemByIndex
===============
*/
gitem_t	*GetItemByIndex (int index)
{
	if (index == 0 || index >= game.num_items)
		return NULL;

	return &itemlist[index];
}


/*
===============
FindItemByClassname

===============
*/
gitem_t	*FindItemByClassname (char *classname)
{
	int		i;
	gitem_t	*it;

	it = itemlist;
	for (i=0 ; i<game.num_items ; i++, it++)
	{
		if (!it->classname)
			continue;
		if (!Q_stricmp(it->classname, classname))
			return it;
	}

	return NULL;
}

/*
===============
FindItem

===============
*/
gitem_t	*FindItem (char *pickup_name)
{
	int		i;
	gitem_t	*it;

	it = itemlist;
	for (i=0 ; i<game.num_items ; i++, it++)
	{
		if (!it->pickup_name)
			continue;
		if (!Q_stricmp(it->pickup_name, pickup_name))
			return it;
	}

	return NULL;
}

//======================================================================

void DoRespawn (edict_t *ent)
{
	if (ent->team)
	{
		edict_t	*master;
		int	count;
		int choice;

		master = ent->teammaster;

		for (count = 0, ent = master; ent; ent = ent->chain, count++)
			;

		choice = rand() % count;

		for (count = 0, ent = master; count < choice; ent = ent->chain, count++)
			;
	}

	ent->svflags &= ~SVF_NOCLIENT;
	ent->solid = SOLID_TRIGGER;
	gi.linkentity (ent);

	// send an effect
	ent->s.event = EV_ITEM_RESPAWN;
}

void SetRespawn (edict_t *ent, float delay)
{
	ent->flags |= FL_RESPAWN;
	ent->svflags |= SVF_NOCLIENT;
	ent->solid = SOLID_NOT;
	ent->nextthink = level.time + delay;
	ent->think = DoRespawn;
	gi.linkentity (ent);
}


//======================================================================

qboolean Pickup_Powerup (edict_t *ent, edict_t *other)
{
	int		quantity;

	quantity = other->client->pers.inventory[ITEM_INDEX(ent->item)];
	if ((skill->value == 1 && quantity >= 2) || (skill->value >= 2 && quantity >= 1))
		return false;

	if ((coop->value) && (ent->item->flags & IT_STAY_COOP) && (quantity > 0))
		return false;

	other->client->pers.inventory[ITEM_INDEX(ent->item)]++;

	if (deathmatch->value)
	{
		if (!(ent->spawnflags & DROPPED_ITEM) )
			SetRespawn (ent, ent->item->quantity);
		if (((int)dmflags->value & DF_INSTANT_ITEMS) || ((ent->item->use == Use_Quad) && (ent->spawnflags & DROPPED_PLAYER_ITEM)))
		{
			if ((ent->item->use == Use_Quad) && (ent->spawnflags & DROPPED_PLAYER_ITEM))
				quad_drop_timeout_hack = (ent->nextthink - level.time) / FRAMETIME;
			ent->item->use (other, ent->item);
		}
	}

	return true;
}

void Drop_General (edict_t *ent, gitem_t *item)
{
	Drop_Item (ent, item);
	ent->client->pers.inventory[ITEM_INDEX(item)]--;
	ValidateSelectedItem (ent);
}


//======================================================================

qboolean Pickup_Adrenaline (edict_t *ent, edict_t *other)
{
	if (!deathmatch->value)
		other->max_health += 1;

	if (other->health < other->max_health)
		other->health = other->max_health;

	if (!(ent->spawnflags & DROPPED_ITEM) && (deathmatch->value))
		SetRespawn (ent, ent->item->quantity);

	return true;
}

qboolean Pickup_AncientHead (edict_t *ent, edict_t *other)
{
	other->max_health += 2;

	if (!(ent->spawnflags & DROPPED_ITEM) && (deathmatch->value))
		SetRespawn (ent, ent->item->quantity);

	return true;
}

qboolean Pickup_Bandolier (edict_t *ent, edict_t *other)
{
	gitem_t	*item;
	int		index;

	if (other->client->pers.max_bullets < 250)
		other->client->pers.max_bullets = 250;
	if (other->client->pers.max_shells < 150)
		other->client->pers.max_shells = 150;
	if (other->client->pers.max_cells < 250)
		other->client->pers.max_cells = 250;
	if (other->client->pers.max_slugs < 75)
		other->client->pers.max_slugs = 75;

	item = FindItem("Bullets");
	if (item)
	{
		index = ITEM_INDEX(item);
		other->client->pers.inventory[index] += item->quantity;
		if (other->client->pers.inventory[index] > other->client->pers.max_bullets)
			other->client->pers.inventory[index] = other->client->pers.max_bullets;
	}

	item = FindItem("Shells");
	if (item)
	{
		index = ITEM_INDEX(item);
		other->client->pers.inventory[index] += item->quantity;
		if (other->client->pers.inventory[index] > other->client->pers.max_shells)
			other->client->pers.inventory[index] = other->client->pers.max_shells;
	}

	if (!(ent->spawnflags & DROPPED_ITEM) && (deathmatch->value))
		SetRespawn (ent, ent->item->quantity);

	return true;
}

qboolean Pickup_Pack (edict_t *ent, edict_t *other)
{
	gitem_t	*item;
	int		index;

	if (other->client->pers.max_bullets < 300)
		other->client->pers.max_bullets = 300;
	if (other->client->pers.max_shells < 200)
		other->client->pers.max_shells = 200;
	if (other->client->pers.max_rockets < 100)
		other->client->pers.max_rockets = 100;
	if (other->client->pers.max_grenades < 100)
		other->client->pers.max_grenades = 100;
	if (other->client->pers.max_cells < 300)
		other->client->pers.max_cells = 300;
	if (other->client->pers.max_slugs < 100)
		other->client->pers.max_slugs = 100;

	item = FindItem("Bullets");
	if (item)
	{
		index = ITEM_INDEX(item);
		other->client->pers.inventory[index] += item->quantity;
		if (other->client->pers.inventory[index] > other->client->pers.max_bullets)
			other->client->pers.inventory[index] = other->client->pers.max_bullets;
	}

	item = FindItem("Shells");
	if (item)
	{
		index = ITEM_INDEX(item);
		other->client->pers.inventory[index] += item->quantity;
		if (other->client->pers.inventory[index] > other->client->pers.max_shells)
			other->client->pers.inventory[index] = other->client->pers.max_shells;
	}

	item = FindItem("Cells");
	if (item)
	{
		index = ITEM_INDEX(item);
		other->client->pers.inventory[index] += item->quantity;
		if (other->client->pers.inventory[index] > other->client->pers.max_cells)
			other->client->pers.inventory[index] = other->client->pers.max_cells;
	}

	item = FindItem("Grenades");
	if (item)
	{
		index = ITEM_INDEX(item);
		other->client->pers.inventory[index] += item->quantity;
		if (other->client->pers.inventory[index] > other->client->pers.max_grenades)
			other->client->pers.inventory[index] = other->client->pers.max_grenades;
	}

	item = FindItem("Rockets");
	if (item)
	{
		index = ITEM_INDEX(item);
		other->client->pers.inventory[index] += item->quantity;
		if (other->client->pers.inventory[index] > other->client->pers.max_rockets)
			other->client->pers.inventory[index] = other->client->pers.max_rockets;
	}

	item = FindItem("Slugs");
	if (item)
	{
		index = ITEM_INDEX(item);
		other->client->pers.inventory[index] += item->quantity;
		if (other->client->pers.inventory[index] > other->client->pers.max_slugs)
			other->client->pers.inventory[index] = other->client->pers.max_slugs;
	}

	if (!(ent->spawnflags & DROPPED_ITEM) && (deathmatch->value))
		SetRespawn (ent, ent->item->quantity);

	return true;
}

//======================================================================

void Use_Quad (edict_t *ent, gitem_t *item)
{
	int		timeout;

	ent->client->pers.inventory[ITEM_INDEX(item)]--;
	ValidateSelectedItem (ent);

	if (quad_drop_timeout_hack)
	{
		timeout = quad_drop_timeout_hack;
		quad_drop_timeout_hack = 0;
	}
	else
	{
		timeout = 300;
	}

	if (ent->client->quad_framenum > level.framenum)
		ent->client->quad_framenum += timeout;
	else
		ent->client->quad_framenum = level.framenum + timeout;

	gi.sound(ent, CHAN_ITEM, gi.soundindex("items/damage.wav"), 1, ATTN_NORM, 0);
}

//======================================================================

void Use_Breather (edict_t *ent, gitem_t *item)
{
	ent->client->pers.inventory[ITEM_INDEX(item)]--;
	ValidateSelectedItem (ent);

	if (ent->client->breather_framenum > level.framenum)
		ent->client->breather_framenum += 300;
	else
		ent->client->breather_framenum = level.framenum + 300;

//	gi.sound(ent, CHAN_ITEM, gi.soundindex("items/damage.wav"), 1, ATTN_NORM, 0);
}

//======================================================================

void Use_Envirosuit (edict_t *ent, gitem_t *item)
{
	ent->client->pers.inventory[ITEM_INDEX(item)]--;
	ValidateSelectedItem (ent);

	if (ent->client->enviro_framenum > level.framenum)
		ent->client->enviro_framenum += 300;
	else
		ent->client->enviro_framenum = level.framenum + 300;

//	gi.sound(ent, CHAN_ITEM, gi.soundindex("items/damage.wav"), 1, ATTN_NORM, 0);
}

//======================================================================

void	Use_Invulnerability (edict_t *ent, gitem_t *item)
{
	ent->client->pers.inventory[ITEM_INDEX(item)]--;
	ValidateSelectedItem (ent);

	if (ent->client->invincible_framenum > level.framenum)
		ent->client->invincible_framenum += 300;
	else
		ent->client->invincible_framenum = level.framenum + 300;

	gi.sound(ent, CHAN_ITEM, gi.soundindex("items/protect.wav"), 1, ATTN_NORM, 0);
}

//======================================================================

void	Use_Silencer (edict_t *ent, gitem_t *item)
{
	ent->client->pers.inventory[ITEM_INDEX(item)]--;
	ValidateSelectedItem (ent);
	ent->client->silencer_shots += 30;

//	gi.sound(ent, CHAN_ITEM, gi.soundindex("items/damage.wav"), 1, ATTN_NORM, 0);
}

//======================================================================

qboolean Pickup_Key (edict_t *ent, edict_t *other)
{
	if (coop->value)
	{
		if (strcmp(ent->classname, "key_power_cube") == 0)
		{
			if (other->client->pers.power_cubes & ((ent->spawnflags & 0x0000ff00)>> 8))
				return false;
			other->client->pers.inventory[ITEM_INDEX(ent->item)]++;
			other->client->pers.power_cubes |= ((ent->spawnflags & 0x0000ff00) >> 8);
		}
		else
		{
			if (other->client->pers.inventory[ITEM_INDEX(ent->item)])
				return false;
			other->client->pers.inventory[ITEM_INDEX(ent->item)] = 1;
		}
		return true;
	}
	other->client->pers.inventory[ITEM_INDEX(ent->item)]++;
	return true;
}

//======================================================================

qboolean Add_Ammo (edict_t *ent, gitem_t *item, int count)
{
	int			index;
	int			max;

	if (!ent->client)
		return false;

	if (item->tag == AMMO_BULLETS)
		max = ent->client->pers.max_bullets;
	else if (item->tag == AMMO_SHELLS)
		max = ent->client->pers.max_shells;
	else if (item->tag == AMMO_ROCKETS)
		max = ent->client->pers.max_rockets;
	else if (item->tag == AMMO_GRENADES)
		max = ent->client->pers.max_grenades;
	else if (item->tag == AMMO_CELLS)
		max = ent->client->pers.max_cells;
	else if (item->tag == AMMO_SLUGS)
		max = ent->client->pers.max_slugs;
	else
		return false;

	index = ITEM_INDEX(item);

	if (ent->client->pers.inventory[index] == max)
		return false;

	ent->client->pers.inventory[index] += count;

	if (ent->client->pers.inventory[index] > max)
		ent->client->pers.inventory[index] = max;

	return true;
}

qboolean Pickup_Ammo (edict_t *ent, edict_t *other)
{
	int			oldcount;
	int			count;
	qboolean	weapon;

	weapon = (ent->item->flags & IT_WEAPON);
	if ( (weapon) && ( (int)dmflags->value & DF_INFINITE_AMMO ) )
		count = 1000;
	else if (ent->count)
		count = ent->count;
	else
		count = ent->item->quantity;

	oldcount = other->client->pers.inventory[ITEM_INDEX(ent->item)];

	if (!Add_Ammo (other, ent->item, count))
		return false;

	if (weapon && !oldcount)
	{
		if (other->client->pers.weapon != ent->item && ( !deathmatch->value || other->client->pers.weapon == FindItem("blaster") ) )
			other->client->newweapon = ent->item;
	}

	if (!(ent->spawnflags & (DROPPED_ITEM | DROPPED_PLAYER_ITEM)) && (deathmatch->value))
		SetRespawn (ent, 30);
	return true;
}

void Drop_Ammo (edict_t *ent, gitem_t *item)
{
	edict_t	*dropped;
	int		index;

	index = ITEM_INDEX(item);
	dropped = Drop_Item (ent, item);
	if (ent->client->pers.inventory[index] >= item->quantity)
		dropped->count = item->quantity;
	else
		dropped->count = ent->client->pers.inventory[index];

	if (ent->client->pers.weapon && 
		ent->client->pers.weapon->tag == AMMO_GRENADES &&
		item->tag == AMMO_GRENADES &&
		ent->client->pers.inventory[index] - dropped->count <= 0) {
		gi.cprintf (ent, PRINT_HIGH, "Can't drop current weapon\n");
		G_FreeEdict(dropped);
		return;
	}

	ent->client->pers.inventory[index] -= dropped->count;
	ValidateSelectedItem (ent);
}


//======================================================================

void MegaHealth_think (edict_t *self)
{
	if (self->owner->health > self->owner->max_health)
	{
		self->nextthink = level.time + 1;
		self->owner->health -= 1;
		return;
	}

	if (!(self->spawnflags & DROPPED_ITEM) && (deathmatch->value))
		SetRespawn (self, 20);
	else
		G_FreeEdict (self);
}