// Functions for q3 weapon dropping by [SuB]paranoid, paranoid@planetstealth.de
// for use with my tutorial at www.planetquake.com/code3arena ( Tutorial 22 ).

/*
=============
ThrowWeapon

XRAY FMJ
=============
*/

void ThrowWeapon( gentity_t *ent )
{
	gclient_t	*client;
	usercmd_t	*ucmd;
	gitem_t		*xr_item;
	gentity_t	*xr_drop;
	byte i;
	int amount;

	client = ent->client;
	ucmd = &ent->client->pers.cmd;

	if( client->ps.weapon == WP_GAUNTLET
		|| client->ps.weapon == WP_MACHINEGUN
		|| client->ps.weapon == WP_GRAPPLING_HOOK
		|| ( ucmd->buttons & BUTTON_ATTACK ))
		return;


	xr_item = BG_FindItemForWeapon( client->ps.weapon );

	amount= client->ps.ammo[ client->ps.weapon ]; // XRAY save amount
	client->ps.ammo[ client->ps.weapon ] = 0;

	client->ps.stats[STAT_WEAPONS] &= ~( 1 << client->ps.weapon );
	client->ps.weapon = WP_MACHINEGUN;
	for ( i = WP_NUM_WEAPONS - 1 ; i > 0 ; i-- ) {
		if ( client->ps.stats[STAT_WEAPONS] & ( 1 << i ) ) {
			client->ps.weapon = i;
			break;
		}
	}

	xr_drop= dropWeapon( ent, xr_item, 0, FL_DROPPED_ITEM | FL_THROWN_ITEM );
	if( amount != 0)
		xr_drop->count= amount;
	else
		xr_drop->count= -1; // XRAY FMJ 0 is already taken, -1 means no ammo
}

// ---

/*
================
dropWeapon

XRAY FMJ
================
*/
gentity_t *dropWeapon( gentity_t *ent, gitem_t *item, float angle, int xr_flags ) { // XRAY FMJ
	vec3_t	velocity;
	vec3_t	origin;

	VectorCopy( ent->s.pos.trBase, origin );

	// set aiming directions
	AngleVectors (ent->client->ps.viewangles, velocity, NULL, NULL);

	origin[2] += ent->client->ps.viewheight;
	VectorMA( origin, 34, velocity, origin ); // 14
	// snap to integer coordinates for more efficient network bandwidth usage
	SnapVector( origin);

	// extra vertical velocity
	velocity[2] += 0.2;
	VectorNormalize( velocity );
	return LaunchItem( item, origin, velocity, xr_flags );
}

// ---


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

Spawns an item and tosses it forward
================
*/
gentity_t *LaunchItem( gitem_t *item, vec3_t origin, vec3_t velocity, int xr_flags ) {
	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;
	VectorSet (dropped->r.mins, -ITEM_RADIUS, -ITEM_RADIUS, -ITEM_RADIUS);
	VectorSet (dropped->r.maxs, ITEM_RADIUS, ITEM_RADIUS, ITEM_RADIUS);
	dropped->r.contents = CONTENTS_TRIGGER;

	dropped->touch = Touch_Item;

	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;

	if (item->giType == IT_TEAM) { // Special case for CTF flags
		dropped->think = Team_DroppedFlagThink;
		dropped->nextthink = level.time + 30000;
		Team_CheckDroppedItem( dropped );
	} else { // auto-remove after 30 seconds
		dropped->think = G_FreeEntity;
		dropped->nextthink = level.time + 30000;
	}

	dropped->flags = xr_flags;

	if( xr_flags & FL_THROWN_ITEM) {
		dropped->clipmask = MASK_SHOT; // XRAY FMJ
		dropped->s.pos.trTime = level.time - 50; // move a bit on the very first frame
		VectorScale( velocity, 500, dropped->s.pos.trDelta ); // 700
		SnapVector( dropped->s.pos.trDelta );	 // save net bandwidth
		dropped->physicsBounce= 0.65;
	}

	trap_LinkEntity (dropped);

	return dropped;
}

// EOF