Function NPC_Begin

code/game/NPC_spawn.cpp:985–1326

//--------------------------------------------------------------
extern qboolean	stop_icarus;
void NPC_Begin (gentity_t *ent)
{
	vec3_t	spawn_origin, spawn_angles;
	gclient_t	*client;
	usercmd_t	ucmd;
	gentity_t	*spawnPoint = NULL;

	memset( &ucmd, 0, sizeof( ucmd ) );

	if ( !(ent->spawnflags & SFB_NOTSOLID) )
	{//No NPCs should telefrag
		if ( Q_stricmp( ent->NPC_type, "nullDriver") == 0 )
		{//FIXME: should be a better way to check this
		}
		else if( SpotWouldTelefrag( ent, TEAM_FREE ) )//(team_t)(ent->client->playerTeam)
		{
			if ( ent->wait < 0 )
			{//remove yourself
				Quake3Game()->DebugPrint( IGameInterface::WL_ERROR, "NPC %s could not spawn, firing target3 (%s) and removing self\n", ent->targetname, ent->target3 );
				//Fire off our target3
				G_UseTargets2( ent, ent, ent->target3 );

				//Kill us
				ent->e_ThinkFunc = thinkF_G_FreeEntity;
				ent->nextthink = level.time + 100;
			}
			else
			{
				Quake3Game()->DebugPrint( IGameInterface::WL_ERROR, "NPC %s at (%5.0f %5.0f %5.0f) couldn't spawn, waiting %4.2f secs to try again\n",
					ent->targetname, ent->s.origin[0], ent->s.origin[1], ent->s.origin[2], ent->wait/1000.0f );
				ent->e_ThinkFunc = thinkF_NPC_Begin;
				ent->nextthink = level.time + ent->wait;//try again in half a second
			}
			return;
		}
	}
	//Spawn effect
	NPC_SpawnEffect( ent );

	VectorCopy( ent->client->ps.origin, spawn_origin);
	VectorCopy( ent->s.angles, spawn_angles);
	spawn_angles[YAW] = ent->NPC->desiredYaw;

	client = ent->client;

	// increment the spawncount so the client will detect the respawn
	client->ps.persistant[PERS_SPAWN_COUNT]++;

	client->airOutTime = level.time + 12000;

	client->ps.clientNum = ent->s.number;
	// clear entity values

	if ( ent->health )	// Was health supplied in map
	{
		ent->max_health = client->pers.maxHealth = client->ps.stats[STAT_MAX_HEALTH] = ent->health;
	}
	else if ( ent->NPC->stats.health )	// Was health supplied in NPC.cfg?