jedioutcast/code/game/g_items.cpp

// leave this line at the top for all g_xxxx.cpp files...
#include "g_headers.h"



#include "g_local.h"
#include "g_functions.h"
#include "g_items.h"
#include "wp_saber.h"


extern void CrystalAmmoSettings(gentity_t *ent);
extern void G_CreateG2AttachedWeaponModel( gentity_t *ent, const char *weaponModel );
extern void ChangeWeapon( gentity_t *ent, int newWeapon );
extern void G_SoundOnEnt( gentity_t *ent, soundChannel_t channel, const char *soundPath );

extern	cvar_t	*g_spskill;

#define MAX_BACTA_HEAL_AMOUNT		25

/*

  Items are any object that a player can touch to gain some effect.

  Pickup will return the number of seconds until they should respawn.

  all items should pop when dropped in lava or slime

  Respawnable items don't actually go away when picked up, they are
  just made invisible and untouchable.  This allows them to ride
  movers and respawn apropriately.
*/

// Item Spawn flags
#define ITMSF_SUSPEND		1
#define ITMSF_TEAM			2
#define ITMSF_MONSTER		4
#define ITMSF_NOTSOLID		8
#define ITMSF_VERTICAL		16
#define ITMSF_INVISIBLE		32

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

/*
===============
G_InventorySelectable
===============
*/
qboolean G_InventorySelectable( int index,gentity_t *other) 
{
	if (other->client->ps.inventory[index])
	{
		return qtrue;
	}

	return qfalse;
}

extern qboolean INV_GoodieKeyGive( gentity_t *target );
extern qboolean INV_SecurityKeyGive( gentity_t *target, const char *keyname );
int Pickup_Holdable( gentity_t *ent, gentity_t *other ) 
{
	int		i,original;

	other->client->ps.stats[STAT_ITEMS] |= (1<<ent->item->giTag);

	if ( ent->item->giTag == INV_SECURITY_KEY1 )
	{//give the key
		//FIXME: temp message
		gi.SendServerCommand( NULL, "cp \"You took the security key\"" );
		INV_SecurityKeyGive( other, ent->message );
	}
	else if ( ent->item->giTag == INV_GOODIE_KEY1 )
	{//give the key
		//FIXME: temp message
		gi.SendServerCommand( NULL, "cp \"You took the key\"" );
		INV_GoodieKeyGive( other );
	}
	else
	{// Picking up a normal item?
		other->client->ps.inventory[ent->item->giTag]++;
	}
	// Got a security key

	// Set the inventory select, just in case it hasn't
	original = cg.inventorySelect;
	for ( i = 0 ; i < INV_MAX ; i++ ) 
	{
		if ((cg.inventorySelect < INV_ELECTROBINOCULARS) || (cg.inventorySelect >= INV_MAX))
		{ 
			cg.inventorySelect = (INV_MAX - 1); 
		}
		
		if ( G_InventorySelectable( cg.inventorySelect,other ) ) 
		{	
			return 60;
		}
		cg.inventorySelect++;
	}

	cg.inventorySelect = original;

	return 60;
}


//======================================================================
int Add_Ammo2 (gentity_t *ent, int ammoType, int count)
{

	if (ammoType != AMMO_FORCE)
	{
		ent->client->ps.ammo[ammoType] += count;

		if ( ent->client->ps.ammo[ammoType] > ammoData[ammoType].max ) 
		{
			ent->client->ps.ammo[ammoType] = ammoData[ammoType].max;
			return qfalse;
		}
	}
	else
	{
		ent->client->ps.forcePower += count;

		if (ent->client->ps.forcePower >= ammoData[ammoType].max)
		{
			ent->client->ps.forcePower = ammoData[ammoType].max;
			return qfalse;		// can't hold any more
		}
	}
	return qtrue;
}

//-------------------------------------------------------
void Add_Ammo (gentity_t *ent, int weapon, int count)
{
	Add_Ammo2(ent,weaponData[weapon].ammoIndex,count);
}

//-------------------------------------------------------
int Pickup_Ammo (gentity_t *ent, gentity_t *other)
{
	int		quantity;

	if ( ent->count ) {
		quantity = ent->count;
	} else {
		quantity = ent->item->quantity;
	}

	Add_Ammo2 (other, ent->item->giTag, quantity);

	return 30;
}

//======================================================================
void Add_Batteries( gentity_t *ent, int *count )
{
	if ( ent->client && ent->client->ps.batteryCharge < MAX_BATTERIES && *count )
	{
		if ( *count + ent->client->ps.batteryCharge > MAX_BATTERIES )
		{
			// steal what we need, then leave the rest for later
			*count -= ( MAX_BATTERIES - ent->client->ps.batteryCharge );
			ent->client->ps.batteryCharge = MAX_BATTERIES;
		}
		else
		{
			// just drain all of the batteries
			ent->client->ps.batteryCharge += *count;	
			*count = 0;
		}

		G_AddEvent( ent, EV_BATTERIES_CHARGED, 0 );
	}
}

//-------------------------------------------------------
int Pickup_Battery( gentity_t *ent, gentity_t *other )
{
	int	quantity;

	if ( ent->count ) 
	{
		quantity = ent->count;
	} 
	else 
	{
		quantity = ent->item->quantity;
	}

	// There may be some left over in quantity if the player is close to full, but with pickup items, this amount will just be lost
	Add_Batteries( other, &quantity );

	return 30;
}

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


extern void WP_SaberInitBladeData( gentity_t *ent );
int Pickup_Weapon (gentity_t *ent, gentity_t *other) 
{
	int		quantity;
	qboolean	hadWeapon = qfalse;

	/*
	if ( ent->count || (ent->activator && !ent->activator->s.number) ) 
	{
		quantity = ent->count;
	} 
	else 
	{
		quantity = ent->item->quantity;
	}
	*/

	// dropped items are always picked up
	if ( ent->flags & FL_DROPPED_ITEM ) 
	{
		quantity = ent->count;
	}
	else
	{//wasn't dropped
		quantity = ent->item->quantity?ent->item->quantity:50;
	}

	// add the weapon
	if ( other->client->ps.stats[STAT_WEAPONS] & ( 1 << ent->item->giTag ) )
	{
		hadWeapon = qtrue;
	}
	other->client->ps.stats[STAT_WEAPONS] |= ( 1 << ent->item->giTag );

	if ( ent->item->giTag == WP_SABER && !hadWeapon )
	{
		WP_SaberInitBladeData( other );
	}

	if ( other->s.weapon == WP_NONE && other->s.number )
	{//NPC with no weapon picked up a weapon, change to this weapon
		//FIXME: clear/set the alt-fire flag based on the picked up weapon and my class?
		other->client->ps.weapon = ent->item->giTag;
		other->client->ps.weaponstate = WEAPON_RAISING;
		ChangeWeapon( other, ent->item->giTag );
		if ( ent->item->giTag == WP_SABER )
		{
			G_CreateG2AttachedWeaponModel( other, other->client->ps.saberModel );
		}
		else
		{
			G_CreateG2AttachedWeaponModel( other, weaponData[ent->item->giTag].weaponMdl );
		}
	}

	if ( quantity )
	{
		// Give ammo
		Add_Ammo( other, ent->item->giTag, quantity );
	}

	return 5;
}


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

int ITM_AddHealth (gentity_t *ent, int count) 
{
	
	ent->health += count;

	if (ent->health > ent->client->ps.stats[STAT_MAX_HEALTH])	// Past max health
	{
		ent->health = ent->client->ps.stats[STAT_MAX_HEALTH];

		return qfalse;
	}

	return qtrue;

}

int Pickup_Health (gentity_t *ent, gentity_t *other) {
	int			max;
	int			quantity;

	max = other->client->ps.stats[STAT_MAX_HEALTH];

	if ( ent->count ) {
		quantity = ent->count;
	} else {
		quantity = ent->item->quantity;
	}

	other->health += quantity;

	if (other->health > max ) {
		other->health = max;
	}

	if ( ent->item->giTag == 100 ) {		// mega health respawns slow
		return 120;
	}

	return 30;
}

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

int ITM_AddArmor (gentity_t *ent, int count) 
{
	
	ent->client->ps.stats[STAT_ARMOR] += count;

	if (ent->client->ps.stats[STAT_ARMOR] > ent->client->ps.stats[STAT_MAX_HEALTH]) 
	{
		ent->client->ps.stats[STAT_ARMOR] = ent->client->ps.stats[STAT_MAX_HEALTH];
		return qfalse;
	}

	return qtrue;
}


int Pickup_Armor( gentity_t *ent, gentity_t *other ) {

	// make sure that the shield effect is on
	other->client->ps.powerups[PW_BATTLESUIT] = Q3_INFINITE;

	other->client->ps.stats[STAT_ARMOR] += ent->item->quantity;
	if ( other->client->ps.stats[STAT_ARMOR] > other->client->ps.stats[STAT_MAX_HEALTH] ) {
		other->client->ps.stats[STAT_ARMOR] = other->client->ps.stats[STAT_MAX_HEALTH];
	}

	return 30;
}



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

int Pickup_Holocron( gentity_t *ent, gentity_t *other )
{
	int forcePower = ent->item->giTag;
	int forceLevel = ent->count;
	// check if out of range
	if( forceLevel < 0 || forceLevel >= NUM_FORCE_POWER_LEVELS )
	{
		gi.Printf(" Pickup_Holocron : count %d not in valid range\n", forceLevel );
		return 1;
	}
	 
	// don't pick up if already known AND your level is higher than pickup level
	if ( ( other->client->ps.forcePowersKnown & ( 1 << forcePower )) )
	{
		//don't pickup if item is lower than current level
		if( other->client->ps.forcePowerLevel[forcePower] >= forceLevel )
		{
			return 1;
		}
	}

	other->client->ps.forcePowerLevel[forcePower] = forceLevel;
	other->client->ps.forcePowersKnown |= ( 1 << forcePower );
	
	
	return 1;
}


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

/*
===============
RespawnItem
===============
*/
void RespawnItem( gentity_t *ent ) {
}


qboolean CheckItemCanBePickedUpByNPC( gentity_t *item, gentity_t *pickerupper )
{
	if ( (item->flags&FL_DROPPED_ITEM) 
		&& item->activator != &g_entities[0] 
		&& pickerupper->s.number 
		&& pickerupper->s.weapon == WP_NONE 
		&& pickerupper->enemy 
		&& pickerupper->painDebounceTime < level.time
		&& pickerupper->NPC && pickerupper->NPC->surrenderTime < level.time //not surrendering
		&& !(pickerupper->NPC->scriptFlags&SCF_FORCED_MARCH) //not being forced to march
		&& item->item->giTag != INV_SECURITY_KEY1 )
	{//non-player, in combat, picking up a dropped item that does NOT belong to the player and it *not* a security key
		if ( level.time - item->s.time < 3000 )//was 5000
		{
			return qfalse;
		}
		return qtrue;
	}
	return qfalse;
}
/*
===============
Touch_Item
===============
*/
void Touch_Item (gentity_t *ent, gentity_t *other, trace_t *trace) {
	int			respawn = 0;

	if (!other->client)
		return;
	if (other->health < 1)
		return;		// dead people can't pickup

	if ( other->client->ps.pm_time > 0 )
	{//cant pick up when out of control
		return;
	}

	// Only monsters can pick it up
	if ((ent->spawnflags &  ITMSF_MONSTER) && (other->client->playerTeam == TEAM_PLAYER))
	{
		return;
	}

	// Only starfleet can pick it up
	if ((ent->spawnflags &  ITMSF_TEAM) && (other->client->playerTeam != TEAM_PLAYER))
	{
		return;
	}

	
	if ( other->client->NPC_class == CLASS_ATST || 
		other->client->NPC_class == CLASS_GONK || 
		other->client->NPC_class == CLASS_MARK1 || 
		other->client->NPC_class == CLASS_MARK2 || 
		other->client->NPC_class == CLASS_MOUSE || 
		other->client->NPC_class == CLASS_PROBE || 
		other->client->NPC_class == CLASS_PROTOCOL || 
		other->client->NPC_class == CLASS_R2D2 || 
		other->client->NPC_class == CLASS_R5D2 || 
		other->client->NPC_class == CLASS_SEEKER || 
		other->client->NPC_class == CLASS_REMOTE || 
		other->client->NPC_class == CLASS_SENTRY )
	{//FIXME: some flag would be better
		//droids can't pick up items/weapons!
		return;
	}

	//FIXME: need to make them run toward a dropped weapon when fleeing without one?
	//FIXME: need to make them come out of flee mode when pick up their old weapon?
	if ( CheckItemCanBePickedUpByNPC( ent, other ) )
	{
		if ( other->NPC && other->NPC->goalEntity && other->NPC->goalEntity->enemy == ent )
		{//they were running to pick me up, they did, so clear goal
			other->NPC->goalEntity = NULL;
			other->NPC->squadState = SQUAD_STAND_AND_SHOOT;
		}
	}
	else if (!(ent->spawnflags &  ITMSF_TEAM) && !(ent->spawnflags &  ITMSF_MONSTER))
	{// Only player can pick it up
		if ( other->s.number != 0 )	// Not the player?
		{
			return;
		}
	}

	// the same pickup rules are used for client side and server side
	if ( !BG_CanItemBeGrabbed( &ent->s, &other->client->ps ) ) {
		return;
	}

	if (!ent->item) {		//not an item!
		gi.Printf( "Touch_Item: %s is not an item!\n", ent->classname);
		return;
	}
	// call the item-specific pickup function
	switch( ent->item->giType ) 
	{
	case IT_WEAPON:
		if ( other->NPC && other->s.weapon == WP_NONE )
		{//Make them duck and sit here for a few seconds
			int pickUpTime = Q_irand( 1000, 3000 );
			TIMER_Set( other, "duck", pickUpTime );
			TIMER_Set( other, "roamTime", pickUpTime );
			TIMER_Set( other, "stick", pickUpTime );
			TIMER_Set( other, "verifyCP", pickUpTime );
			TIMER_Set( other, "attackDelay", 600 );
			respawn = 0;
		}
		respawn = Pickup_Weapon(ent, other);
		break;
	case IT_AMMO:
		respawn = Pickup_Ammo(ent, other);
		break;
	case IT_ARMOR:
		respawn = Pickup_Armor(ent, other);
		break;
	case IT_HEALTH:
		respawn = Pickup_Health(ent, other);
		break;
	case IT_HOLDABLE:
		respawn = Pickup_Holdable(ent, other);
		break;
	case IT_BATTERY:
		respawn = Pickup_Battery( ent, other );
		break;
	case IT_HOLOCRON:
		respawn = Pickup_Holocron( ent, other );
		break;
	default:
		return;
	}

	if ( !respawn ) 
	{
		return;
	}

	// play the normal pickup sound
	G_AddEvent( other, EV_ITEM_PICKUP, ent->s.modelindex );

	// fire item targets
	G_UseTargets (ent, other);

	// wait of -1 will not respawn
//	if ( ent->wait == -1 ) 
	{
		//why not just remove me?
		G_FreeEntity( ent );
		/*
		//NOTE: used to do this:  (for respawning?)
		ent->svFlags |= SVF_NOCLIENT;
		ent->s.eFlags |= EF_NODRAW;
		ent->contents = 0;
		ent->unlinkAfterEvent = qtrue;
		*/
		return;
	}
}


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

/*
================
LaunchItem

Spawns an item and tosses it forward
================
*/
gentity_t *LaunchItem( gitem_t *item, vec3_t origin, vec3_t velocity, char *target ) {
	gentity_t	*dropped;

	dropped = G_Spawn();

	dropped->s.eType = ET_ITEM;
	dropped->s.modelindex = item - bg_itemlist;	// store item number in modelindex
	dropped->s.modelindex2 = 1; // This is non-zero is it's a dropped item

	dropped->classname = item->classname;
	dropped->item = item;

	// try using the "correct" mins/maxs first
	VectorSet( dropped->mins, item->mins[0], item->mins[1], item->mins[2] );
	VectorSet( dropped->maxs, item->maxs[0], item->maxs[1], item->maxs[2] );

	if ((!dropped->mins[0] && !dropped->mins[1] && !dropped->mins[2]) && 
		(!dropped->maxs[0] && !dropped->maxs[1] && !dropped->maxs[2]))
	{
		VectorSet( dropped->maxs, ITEM_RADIUS, ITEM_RADIUS, ITEM_RADIUS );
		VectorScale( dropped->maxs, -1, dropped->mins );
	}

	dropped->contents = CONTENTS_TRIGGER|CONTENTS_ITEM;//CONTENTS_TRIGGER;//not CONTENTS_BODY for dropped items, don't need to ID them

	if ( target && target[0] )
	{
		dropped->target = G_NewString( target );
	}
	else
	{
		// if not targeting something, auto-remove after 30 seconds
		dropped->e_ThinkFunc = thinkF_G_FreeEntity;
		dropped->nextthink = level.time + 30000;
	}

	dropped->e_TouchFunc = touchF_Touch_Item;

	if ( item->giType == IT_WEAPON )
	{
		// give weapon items zero pitch, a random yaw, and rolled onto their sides...but would be bad to do this for a bowcaster
		if ( item->giTag != WP_BOWCASTER )
		{
			VectorSet( dropped->s.angles, 0, crandom() * 180, 90.0f );
			G_SetAngles( dropped, dropped->s.angles );
		}
	}

	G_SetOrigin( dropped, origin );
	dropped->s.pos.trType = TR_GRAVITY;
	dropped->s.pos.trTime = level.time;
	VectorCopy( velocity, dropped->s.pos.trDelta );

	dropped->s.eFlags |= EF_BOUNCE_HALF;

	dropped->flags = FL_DROPPED_ITEM;

	gi.linkentity (dropped);

	return dropped;
}

/*
================
Drop_Item

Spawns an item and tosses it forward
================
*/
gentity_t *Drop_Item( gentity_t *ent, gitem_t *item, float angle, qboolean copytarget ) {
	gentity_t	*dropped = NULL;
	vec3_t	velocity;
	vec3_t	angles;

	VectorCopy( ent->s.apos.trBase, angles );
	angles[YAW] += angle;
	angles[PITCH] = 0;	// always forward

	AngleVectors( angles, velocity, NULL, NULL );
	VectorScale( velocity, 150, velocity );
	velocity[2] += 200 + crandom() * 50;
	
	if ( copytarget )
	{
		dropped = LaunchItem( item, ent->s.pos.trBase, velocity, ent->opentarget );
	}
	else
	{
		dropped = LaunchItem( item, ent->s.pos.trBase, velocity, NULL );
	}

	dropped->activator = ent;//so we know who we belonged to so they can pick it back up later
	dropped->s.time = level.time;//mark this time so we aren't picked up instantly by the guy who dropped us
	return dropped;
}


/*
================
Use_Item

Respawn the item
================
*/
void Use_Item( gentity_t *ent, gentity_t *other, gentity_t *activator ) 
{
	if ( (ent->svFlags&SVF_PLAYER_USABLE) && other && !other->s.number )
	{//used directly by the player, pick me up
		GEntity_TouchFunc( ent, other, NULL );
	}
	else
	{//use me
		if ( ent->spawnflags & 32 ) // invisible
		{
			// If it was invisible, first use makes it visible....
			ent->s.eFlags &= ~EF_NODRAW;
			ent->contents = CONTENTS_TRIGGER|CONTENTS_ITEM;

			ent->spawnflags &= ~32;
			return;
		}

		G_ActivateBehavior( ent, BSET_USE );
		RespawnItem( ent );
	}
}

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

/*
================
FinishSpawningItem

Traces down to find where an item should rest, instead of letting them
free fall from their spawn points
================
*/
#ifndef FINAL_BUILD
extern int delayedShutDown;
#endif
void FinishSpawningItem( gentity_t *ent ) {
	trace_t		tr;
	vec3_t		dest;
	gitem_t		*item;
	int			itemNum;

	itemNum=1;
	for ( item = bg_itemlist + 1 ; item->classname ; item++,itemNum++) 
	{
		if (!strcmp(item->classname,ent->classname))
		{
			break;
		}
	}

	// Set bounding box for item
	VectorSet( ent->mins, item->mins[0],item->mins[1] ,item->mins[2]);
	VectorSet( ent->maxs, item->maxs[0],item->maxs[1] ,item->maxs[2]);

	if ((!ent->mins[0] && !ent->mins[1] && !ent->mins[2]) && 
		(!ent->maxs[0] && !ent->maxs[1] && !ent->maxs[2]))
	{
		VectorSet (ent->mins, -ITEM_RADIUS, -ITEM_RADIUS, -2);//to match the comments in the items.dat file!
		VectorSet (ent->maxs, ITEM_RADIUS, ITEM_RADIUS, ITEM_RADIUS);
	}

	if ((item->quantity) && (item->giType == IT_AMMO))
	{
		ent->count = item->quantity;
	}

	if ((item->quantity) && (item->giType == IT_BATTERY))
	{
		ent->count = item->quantity; 
	}


//	if ( item->giType == IT_WEAPON ) // NOTE: james thought it was ok to just always do this?
	{
		ent->s.radius = 20;
		VectorSet( ent->s.modelScale, 1.0f, 1.0f, 1.0f );
		gi.G2API_InitGhoul2Model( ent->ghoul2, ent->item->world_model, G_ModelIndex( ent->item->world_model ));
	}

	// Set crystal ammo amount based on skill level
/*	if ((itemNum == ITM_AMMO_CRYSTAL_BORG) ||
		(itemNum == ITM_AMMO_CRYSTAL_DN) ||
		(itemNum == ITM_AMMO_CRYSTAL_FORGE) ||
		(itemNum == ITM_AMMO_CRYSTAL_SCAVENGER) ||
		(itemNum == ITM_AMMO_CRYSTAL_STASIS))
	{
		CrystalAmmoSettings(ent);
	}
*/
	ent->s.eType = ET_ITEM;
	ent->s.modelindex = ent->item - bg_itemlist;		// store item number in modelindex
	ent->s.modelindex2 = 0; // zero indicates this isn't a dropped item

	ent->contents = CONTENTS_TRIGGER|CONTENTS_ITEM;//CONTENTS_BODY;//CONTENTS_TRIGGER|
	ent->e_TouchFunc = touchF_Touch_Item;
	// useing an item causes it to respawn
	ent->e_UseFunc = useF_Use_Item;
	ent->svFlags |= SVF_PLAYER_USABLE;//so player can pick it up

	// Hang in air?
	ent->s.origin[2] += 1;//just to get it off the damn ground because coplanar = insolid
	if ( ent->spawnflags & ITMSF_SUSPEND) 
	{
		// suspended
		G_SetOrigin( ent, ent->s.origin );
	} 
	else 
	{
		// drop to floor
		VectorSet( dest, ent->s.origin[0], ent->s.origin[1], MIN_WORLD_COORD );
		gi.trace( &tr, ent->s.origin, ent->mins, ent->maxs, dest, ent->s.number, MASK_SOLID|CONTENTS_PLAYERCLIP );
		if ( tr.startsolid ) 
		{
			if ( &g_entities[tr.entityNum] != NULL )
			{
				gi.Printf (S_COLOR_RED"FinishSpawningItem: removing %s startsolid at %s (in a %s)\n", ent->classname, vtos(ent->s.origin), g_entities[tr.entityNum].classname );
			}
			else
			{
				gi.Printf (S_COLOR_RED"FinishSpawningItem: removing %s startsolid at %s (in a %s)\n", ent->classname, vtos(ent->s.origin) );
			}
			assert( 0 && "item starting in solid");
#ifndef FINAL_BUILD
			if (!g_entities[ENTITYNUM_WORLD].s.radius){	//not a region
				delayedShutDown = level.time + 100;
			}
#endif
			G_FreeEntity( ent );
			return;
		}

		// allow to ride movers
		ent->s.groundEntityNum = tr.entityNum;

		G_SetOrigin( ent, tr.endpos );
	}

/* ? don't need this
	// team slaves and targeted items aren't present at start
	if ( ( ent->flags & FL_TEAMSLAVE ) || ent->targetname ) {
		ent->s.eFlags |= EF_NODRAW;
		ent->contents = 0;
		return;
	}
*/
	if ( ent->spawnflags & ITMSF_INVISIBLE ) // invisible
	{
		ent->s.eFlags |= EF_NODRAW;
		ent->contents = 0;
	}

	if ( ent->spawnflags & ITMSF_NOTSOLID ) // not solid
	{
		ent->contents = 0;
	}

	gi.linkentity (ent);
}


qboolean	itemRegistered[MAX_ITEMS];


/*
==============
ClearRegisteredItems
==============
*/
void ClearRegisteredItems( void ) {
	memset( itemRegistered, 0, sizeof( itemRegistered ) );

	RegisterItem( FindItemForWeapon( WP_BRYAR_PISTOL ) );	//these are given in g_client, ClientSpawn(), but MUST be registered HERE, BEFORE cgame starts.
	RegisterItem( FindItemForWeapon( WP_STUN_BATON ) );			//these are given in g_client, ClientSpawn(), but MUST be registered HERE, BEFORE cgame starts.
	RegisterItem( FindItemForInventory( INV_ELECTROBINOCULARS ));
	// saber or baton is cached in SP_info_player_deathmatch now.

extern void Player_CacheFromPrevLevel(void);//g_client.cpp
	Player_CacheFromPrevLevel();	//reads from transition carry-over;
}

/*
===============
RegisterItem

The item will be added to the precache list
===============
*/
void RegisterItem( gitem_t *item ) {
	if ( !item ) {
		G_Error( "RegisterItem: NULL" );
	}
	itemRegistered[ item - bg_itemlist ] = qtrue;
}


/*
===============
SaveRegisteredItems

Write the needed items to a config string
so the client will know which ones to precache
===============
*/
void SaveRegisteredItems( void ) {
	char	string[MAX_ITEMS+1];
	int		i;
	int		count;

	count = 0;
	for ( i = 0 ; i < bg_numItems ; i++ ) {
		if ( itemRegistered[i] ) {
			count++;
			string[i] = '1';
		} else {
			string[i] = '0';
		}
	}
	string[ bg_numItems ] = 0;

	gi.Printf( "%i items registered\n", count );
	gi.SetConfigstring(CS_ITEMS, string);
}


/*
============
G_SpawnItem

Sets the clipping size and plants the object on the floor.

Items can't be immediately dropped to floor, because they might
be on an entity that hasn't spawned yet.
============
*/
void G_SpawnItem (gentity_t *ent, gitem_t *item) {
	G_SpawnFloat( "random", "0", &ent->random );
	G_SpawnFloat( "wait", "0", &ent->wait );

	RegisterItem( item );
	ent->item = item;

	// some movers spawn on the second frame, so delay item
	// spawns until the third frame so they can ride trains
	ent->nextthink = level.time + START_TIME_MOVERS_SPAWNED;
	ent->e_ThinkFunc = thinkF_FinishSpawningItem;

	ent->physicsBounce = 0.50;		// items are bouncy

	// Set a default infoString text color
	// NOTE: if we want to do cool cross-hair colors for items, we can just modify this, but for now, don't do it
	VectorSet( ent->startRGBA, 1.0f, 1.0f, 1.0f );
}


/*
================
G_BounceItem

================
*/
void G_BounceItem( gentity_t *ent, trace_t *trace ) {
	vec3_t	velocity;
	float	dot;
	int		hitTime;

	// reflect the velocity on the trace plane
	hitTime = level.previousTime + ( level.time - level.previousTime ) * trace->fraction;
	EvaluateTrajectoryDelta( &ent->s.pos, hitTime, velocity );
	dot = DotProduct( velocity, trace->plane.normal );
	VectorMA( velocity, -2*dot, trace->plane.normal, ent->s.pos.trDelta );

	// cut the velocity to keep from bouncing forever
	VectorScale( ent->s.pos.trDelta, ent->physicsBounce, ent->s.pos.trDelta );

	// check for stop
	if ( trace->plane.normal[2] > 0 && ent->s.pos.trDelta[2] < 40 ) {
		G_SetOrigin( ent, trace->endpos );
		ent->s.groundEntityNum = trace->entityNum;
		return;
	}

	VectorAdd( ent->currentOrigin, trace->plane.normal, ent->currentOrigin);
	VectorCopy( ent->currentOrigin, ent->s.pos.trBase );
	ent->s.pos.trTime = level.time;
}


/*
================
G_RunItem

================
*/
void G_RunItem( gentity_t *ent ) {
	vec3_t		origin;
	trace_t		tr;
	int			contents;
	int			mask;

	// if groundentity has been set to -1, it may have been pushed off an edge
	if ( ent->s.groundEntityNum == ENTITYNUM_NONE ) 
	{
		if ( ent->s.pos.trType != TR_GRAVITY ) 
		{
			ent->s.pos.trType = TR_GRAVITY;
			ent->s.pos.trTime = level.time;
		}
	}

	if ( ent->s.pos.trType == TR_STATIONARY ) 
	{
		// check think function
		G_RunThink( ent );
		if ( !g_gravity->value )
		{
			ent->s.pos.trType = TR_GRAVITY;
			ent->s.pos.trTime = level.time;
			ent->s.pos.trDelta[2] += 100;
		}
		return;
	}

	// get current position
	EvaluateTrajectory( &ent->s.pos, level.time, origin );

	// trace a line from the previous position to the current position
	if ( ent->clipmask ) 
	{
		mask = ent->clipmask;
	} 
	else 
	{
		mask = MASK_SOLID|CONTENTS_PLAYERCLIP;//shouldn't be able to get anywhere player can't
	}

	int ignore = ENTITYNUM_NONE;
	if ( ent->owner )
	{
		ignore = ent->owner->s.number;
	}
	else if ( ent->activator )
	{
		ignore = ent->activator->s.number;
	}
	gi.trace( &tr, ent->currentOrigin, ent->mins, ent->maxs, origin, ignore, mask );

	VectorCopy( tr.endpos, ent->currentOrigin );

	if ( tr.startsolid ) 
	{
		tr.fraction = 0;
	}

	gi.linkentity( ent );	// FIXME: avoid this for stationary?

	// check think function
	G_RunThink( ent );

	if ( tr.fraction == 1 ) 
	{
		if ( g_gravity->value <= 0 )
		{
			if ( ent->s.apos.trType != TR_LINEAR )
			{
				VectorCopy( ent->currentAngles, ent->s.apos.trBase );
				ent->s.apos.trType = TR_LINEAR;
				ent->s.apos.trDelta[1] = Q_flrand( -300, 300 );
				ent->s.apos.trDelta[0] = Q_flrand( -10, 10 );
				ent->s.apos.trDelta[2] = Q_flrand( -10, 10 );
				ent->s.apos.trTime = level.time;
			}
		}
		//friction in zero-G
		if ( !g_gravity->value )
		{
			float friction = 0.975f;
			/*friction -= ent->mass/1000.0f;
			if ( friction < 0.1 )
			{
				friction = 0.1f;
			}
			*/
			VectorScale( ent->s.pos.trDelta, friction, ent->s.pos.trDelta );
			VectorCopy( ent->currentOrigin, ent->s.pos.trBase );
			ent->s.pos.trTime = level.time;
		}
		return;
	}

	// if it is in a nodrop volume, remove it
	contents = gi.pointcontents( ent->currentOrigin, -1 );
	if ( contents & CONTENTS_NODROP ) 
	{
		G_FreeEntity( ent );
		return;
	}

	if ( !tr.startsolid )
	{
		G_BounceItem( ent, &tr );
	}
}

/*
================
ItemUse_Bacta

================
*/
void ItemUse_Bacta(gentity_t *ent)
{
	if (!ent || !ent->client)
	{
		return;
	}

	if (ent->health >= ent->client->ps.stats[STAT_MAX_HEALTH] || !ent->client->ps.inventory[INV_BACTA_CANISTER] )
	{
		return;
	}

	ent->health += MAX_BACTA_HEAL_AMOUNT;

	if (ent->health > ent->client->ps.stats[STAT_MAX_HEALTH])
	{
		ent->health = ent->client->ps.stats[STAT_MAX_HEALTH];
	}

	ent->client->ps.inventory[INV_BACTA_CANISTER]--;

	G_SoundOnEnt( ent, CHAN_VOICE, va( "sound/weapons/force/heal%d.mp3", Q_irand( 1, 4 ) ) );
}