halflife-thewastes-sdk/dlls/items.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.
*
****/
/*

===== items.cpp ========================================================

  functions governing the selection/use of weapons for players

*/

#include "extdll.h"
#include "util.h"
#include "cbase.h"
#include "weapons.h"
#include "player.h"
#include "items.h"
#include "gamerules.h"

extern int gmsgItemPickup;

class CWorldItem : public CBaseEntity
{
public:
	void	KeyValue(KeyValueData *pkvd ); 
	void	Spawn( void );
	int		m_iType;
};

LINK_ENTITY_TO_CLASS(world_items, CWorldItem);

void CWorldItem::KeyValue(KeyValueData *pkvd)
{
	if (FStrEq(pkvd->szKeyName, "type"))
	{
		m_iType = atoi(pkvd->szValue);
		pkvd->fHandled = TRUE;
	}
	else
		CBaseEntity::KeyValue( pkvd );
}

void CWorldItem::Spawn( void )
{
	CBaseEntity *pEntity = NULL;

	switch (m_iType) 
	{
	case 42: // ITEM_ANTIDOTE:
		pEntity = CBaseEntity::Create( "item_antidote", pev->origin, pev->angles );
		break;
	case 43: // ITEM_SECURITY:
		pEntity = CBaseEntity::Create( "item_security", pev->origin, pev->angles );
		break;
	}

	if (!pEntity)
	{
		ALERT( at_console, "unable to create world_item %d\n", m_iType );
	}
	else
	{
		pEntity->pev->target = pev->target;
		pEntity->pev->targetname = pev->targetname;
		pEntity->pev->spawnflags = pev->spawnflags;
	}

	REMOVE_ENTITY(edict());
}


void CItem::Spawn( void )
{
	pev->movetype = MOVETYPE_TOSS;
	pev->solid = SOLID_TRIGGER;
	UTIL_SetOrigin( pev, pev->origin );
	UTIL_SetSize(pev, Vector(-16, -16, 0), Vector(16, 16, 16));
	SetTouch(&CItem::ItemTouch);

	if (DROP_TO_FLOOR(ENT(pev)) == 0)
	{
		ALERT(at_error, "Item %s fell out of level at %f,%f,%f", STRING( pev->classname ), pev->origin.x, pev->origin.y, pev->origin.z);
		UTIL_Remove( this );
		return;
	}
}

extern int gEvilImpulse101;

void CItem::ItemTouch( CBaseEntity *pOther )
{
	// if it's not a player, ignore
	if ( !pOther->IsPlayer() )
	{
		return;
	}

	CBasePlayer *pPlayer = (CBasePlayer *)pOther;

	// ok, a player is touching this item, but can he have it?
	if ( !g_pGameRules->CanHaveItem( pPlayer, this ) )
	{
		// no? Ignore the touch.
		return;
	}

	if (MyTouch( pPlayer ))
	{
		SUB_UseTargets( pOther, USE_TOGGLE, 0 );
		SetTouch( NULL );
		
		// player grabbed the item. 
		g_pGameRules->PlayerGotItem( pPlayer, this );
		if ( g_pGameRules->ItemShouldRespawn( this ) == GR_ITEM_RESPAWN_YES )
		{
			Respawn(); 
		}
		else
		{
			UTIL_Remove( this );
		}
	}
	else if (gEvilImpulse101)
	{
		UTIL_Remove( this );
	}
}

CBaseEntity* CItem::Respawn( void )
{
	SetTouch( NULL );
	pev->effects |= EF_NODRAW;

	UTIL_SetOrigin( pev, g_pGameRules->VecItemRespawnSpot( this ) );// blip to whereever you should respawn.

	SetThink ( &CItem::Materialize );
	pev->nextthink = g_pGameRules->FlItemRespawnTime( this ); 
	return this;
}

void CItem::Materialize( void )
{
	if ( pev->effects & EF_NODRAW )
	{
		pev->effects &= ~EF_NODRAW;
		pev->effects |= EF_MUZZLEFLASH;
	}

	SetTouch( &CItem::ItemTouch );
}