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#include "swserv.h"
/*
* Print estimated time of arrival for object of
* connection.
*/
int CmdETA(int condescriptor, char *arg)
{
long object_num, dest_object_num;
char sndbuf[CS_DATA_MAX_LEN];
double distance;
double velocity;
double eta;
xsw_object_struct *object_num_ptr;
xsw_object_struct *dest_object_ptr;
/* Get object number. */
object_num = connection[condescriptor]->object_num;
if(DBIsObjectGarbage(object_num))
return(-1);
else
object_num_ptr = xsw_object[object_num];
/* Get destination object. */
dest_object_num = object_num_ptr->intercepting_object;
if(DBIsObjectGarbage(dest_object_num))
return(0);
else
dest_object_ptr = (xsw_object_struct
*)xsw_object[dest_object_num];
/* Cannot calculate if velocity is 0. */
velocity = object_num_ptr->velocity;
if(velocity <= 0)
{
return(0);
}
/* Check if in same sector. */
if(!Mu3DInSameSector(object_num, dest_object_num))
{
sprintf(sndbuf,
"ETA: Destination not in current sector."
);
NetSendLiveMessage(condescriptor, sndbuf);
return(0);
}
/* Get distance between objects (in XSW real units). */
distance = Mu3DDistance(
dest_object_ptr->x - object_num_ptr->x,
dest_object_ptr->y - object_num_ptr->y,
dest_object_ptr->z - object_num_ptr->z
);
/* Calculate eta. */
eta = distance / velocity;
/* ETA is in multiples of 16000, must convert into seconds. */
eta = eta / 100;
sprintf(sndbuf,
"ETA to %s in %s",
DBGetFormalNameStr(dest_object_num),
StringFormatTimePeriod((long)eta)
);
NetSendLiveMessage(condescriptor, sndbuf);
return(0);
}
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