/*
=============
SV_EmitPacketEntities
Writes a delta update of an entity_state_t list to the message->
=============
*/
void SV_EmitPacketEntities( sv_client_t *cl, client_frame_t *to, sizebuf_t *msg )
{
entity_state_t *oldent, *newent;
int oldindex, newindex;
int oldnum, newnum;
int from_num_entities;
client_frame_t *from;
// this is the frame that we are going to delta update from
if( cl->delta_sequence != -1 )
{
from = &cl->frames[cl->delta_sequence & SV_UPDATE_MASK];
from_num_entities = from->num_entities;
// the snapshot's entities may still have rolled off the buffer, though
if( from->first_entity <= svs.next_client_entities - svs.num_client_entities )
{
MsgDev( D_WARN, "%s: delta request from out of date entities.\n", cl->name );
from = NULL;
from_num_entities = 0;
BF_WriteByte( msg, svc_packetentities );
BF_WriteWord( msg, to->num_entities );
}
else
{
BF_WriteByte( msg, svc_deltapacketentities );
BF_WriteWord( msg, to->num_entities );
BF_WriteByte( msg, cl->delta_sequence );
}
}
else
{
from = NULL;
from_num_entities = 0;
BF_WriteByte( msg, svc_packetentities );
BF_WriteWord( msg, to->num_entities );
}
newent = NULL;
oldent = NULL;
newindex = 0;
oldindex = 0;
while( newindex < to->num_entities || oldindex < from_num_entities )
{
if( newindex >= to->num_entities )
{
newnum = MAX_ENTNUMBER;
}
else
{
newent = &svs.packet_entities[(to->first_entity+newindex)%svs.num_client_entities];
newnum = newent->number;
}
if( oldindex >= from_num_entities )
{
oldnum = MAX_ENTNUMBER;
}
else
{
oldent = &svs.packet_entities[(from->first_entity+oldindex)%svs.num_client_entities];
oldnum = oldent->number;
}
if( newnum == oldnum )
{
// delta update from old position
// because the force parm is false, this will not result
// in any bytes being emited if the entity has not changed at all
MSG_WriteDeltaEntity( oldent, newent, msg, false, SV_IsPlayerIndex( newent->number ), sv.time );
oldindex++;
newindex++;
continue;
}
if( newnum < oldnum )
{
// this is a new entity, send it from the baseline
MSG_WriteDeltaEntity( &svs.baselines[newnum], newent, msg, true, SV_IsPlayerIndex( newent->number ), sv.time );
newindex++;
continue;
}
if( newnum > oldnum )
{
qboolean force;
if( EDICT_NUM( oldent->number )->free )
force = true; // entity completely removed from server
else force = false; // just removed from delta-message
// remove from message
MSG_WriteDeltaEntity( oldent, NULL, msg, force, false, sv.time );
oldindex++;
continue;
}
}
BF_WriteWord( msg, 0 ); // end of packetentities
}
/*
=============
SV_EmitEvents
=============
*/
static void SV_EmitEvents( sv_client_t *cl, client_frame_t *to, sizebuf_t *msg )
{
event_state_t *es;
event_info_t *info;
entity_state_t *state;
event_args_t nullargs;
int ev_count = 0;
int count, ent_index;
int i, j, ev;
Q_memset( &nullargs, 0, sizeof( nullargs ));
es = &cl->events;
// count events
for( ev = 0; ev < MAX_EVENT_QUEUE; ev++ )
{
if( es->ei[ev].index ) ev_count++;
}
// nothing to send
if( !ev_count ) return; // nothing to send
if( ev_count >= 31 ) ev_count = 31;
for( i = 0; i < MAX_EVENT_QUEUE; i++ )
{
info = &es->ei[i];
if( info->index == 0 )
continue;
ent_index = info->entity_index;
for( j = 0; j < to->num_entities; j++ )
{
state = &svs.packet_entities[(to->first_entity+j)%svs.num_client_entities];
if( state->number == ent_index )
break;
}
if( j >= to->num_entities )
{
// couldn't find
info->packet_index = to->num_entities;
info->args.entindex = ent_index;
}
else
{
info->packet_index = j;
info->args.ducking = 0;
if(!( info->args.flags & FEVENT_ORIGIN ))
VectorClear( info->args.origin );
if(!( info->args.flags & FEVENT_ANGLES ))
VectorClear( info->args.angles );
VectorClear( info->args.velocity );
}
}
BF_WriteByte( msg, svc_event ); // create message
BF_WriteUBitLong( msg, ev_count, 5 ); // up to MAX_EVENT_QUEUE events
for( count = i = 0; i < MAX_EVENT_QUEUE; i++ )
{
info = &es->ei[i];
if( info->index == 0 )
{
info->packet_index = -1;
info->entity_index = -1;
continue;
}
// only send if there's room
if( count < ev_count )
{
BF_WriteUBitLong( msg, info->index, MAX_EVENT_BITS ); // 1024 events
if( info->packet_index == -1 )
{
BF_WriteOneBit( msg, 0 );
}
else
{
BF_WriteOneBit( msg, 1 );
BF_WriteUBitLong( msg, info->packet_index, MAX_ENTITY_BITS );
if( !Q_memcmp( &nullargs, &info->args, sizeof( event_args_t )))
{
BF_WriteOneBit( msg, 0 );
}
else
{
BF_WriteOneBit( msg, 1 );
MSG_WriteDeltaEvent( msg, &nullargs, &info->args );
}
}
if( info->fire_time )
{
BF_WriteOneBit( msg, 1 );
BF_WriteWord( msg, Q_rint( info->fire_time * 100.0f ));
}
else BF_WriteOneBit( msg, 0 );
}
info->index = 0;
info->packet_index = -1;
info->entity_index = -1;
count++;
}
}
/*
==================
MSG_WriteDeltaEntity
Writes part of a packetentities message, including the entity number.
Can delta from either a baseline or a previous packet_entity
If to is NULL, a remove entity update will be sent
If force is not set, then nothing at all will be generated if the entity is
identical, under the assumption that the in-order delta code will catch it.
==================
*/
void MSG_WriteDeltaEntity( entity_state_t *from, entity_state_t *to, sizebuf_t *msg, qboolean force, qboolean player, float timebase )
{
delta_info_t *dt = NULL;
delta_t *pField;
int i, startBit;
int numChanges = 0;
if( to == NULL )
{
int fRemoveType;
if( from == NULL ) return;
// a NULL to is a delta remove message
BF_WriteWord( msg, from->number );
// fRemoveType:
// 0 - keep alive, has delta-update
// 1 - remove from delta message (but keep states)
// 2 - completely remove from server
if( force ) fRemoveType = 2;
else fRemoveType = 1;
BF_WriteUBitLong( msg, fRemoveType, 2 );
return;
}
startBit = msg->iCurBit;
if( to->number < 0 || to->number >= GI->max_edicts )
{
MsgDev( D_ERROR, "MSG_WriteDeltaEntity: Bad entity number: %i\n", to->number );
return;
}
BF_WriteWord( msg, to->number );
BF_WriteUBitLong( msg, 0, 2 ); // alive
if( to->entityType != from->entityType )
{
BF_WriteOneBit( msg, 1 );
BF_WriteUBitLong( msg, to->entityType, 2 );
}
else BF_WriteOneBit( msg, 0 );
if( to->entityType == ENTITY_NORMAL )
{
if( player )
{
dt = Delta_FindStruct( "entity_state_player_t" );
}
else
{
dt = Delta_FindStruct( "entity_state_t" );
}
}
else if( to->entityType == ENTITY_BEAM )
{
dt = Delta_FindStruct( "custom_entity_state_t" );
}
ASSERT( dt && dt->bInitialized );
pField = dt->pFields;
ASSERT( pField );
// activate fields and call custom encode func
Delta_CustomEncode( dt, from, to );
// process fields
for( i = 0; i < dt->numFields; i++, pField++ )
{
if( Delta_WriteField( msg, pField, from, to, timebase ))
numChanges++;
}
// if we have no changes - kill the message
if( !numChanges && !force ) BF_SeekToBit( msg, startBit );
}