void CLagCompensationManager::UpdateAIIndexes()
{
CAI_BaseNPC **ppAIs = g_AI_Manager.AccessAIs();
int nAIs = g_AI_Manager.NumAIs();
for ( int i = 0; i < nAIs; i++ )
{
CAI_BaseNPC *pNPC = ppAIs[i];
if ( pNPC && pNPC->GetAIIndex() != i ) // index of NPC has changed
{// move their data to their new index, probably wanting to delete the old track record
int oldIndex = pNPC->GetAIIndex();
int newIndex = i;
//Msg("Lag compensation record adjusting, moving from index %i to %i\n",oldIndex,newIndex);
CUtlFixedLinkedList< LagRecord > *track = &m_EntityTrack[ oldIndex ];
CUtlFixedLinkedList< LagRecord > *oldTrack = &m_EntityTrack[ newIndex ];
m_EntityTrack[oldIndex] = *oldTrack;
m_EntityTrack[newIndex] = *track;
if ( oldTrack->Count() > 0 ) // there's data in the auld yin, probably from someone newly dead,
{// but if not we'll swap them round so that the old one can then fix their AI index
//Msg("Index %i already contains data!\n",newIndex);
for ( int j=0; j<nAIs; j++ )
{
CAI_BaseNPC *pConflictingNPC = ppAIs[j];
if ( pConflictingNPC && pConflictingNPC->GetAIIndex() == newIndex )
{// found the conflicting NPC, swap them into the old index
pConflictingNPC->SetAIIndex(oldIndex); // presumably they'll fix themselves further down the loop
Warning("Lag compensation adjusting entity index, swapping with an existing entity! (%i & %i)\n",oldIndex,newIndex);
break;
}
}
}
pNPC->SetAIIndex(newIndex);
}
}
//========= End Of AI Patch =======
}
void CLagCompensationManager::BacktrackEntity( CAI_BaseNPC *pEntity, float flTargetTime )
{
Vector org, mins, maxs;
QAngle ang;
VPROF_BUDGET( "BacktrackEntity", "CLagCompensationManager" );
// get track history of this entity
int index = pEntity->GetAIIndex();
CUtlFixedLinkedList< LagRecord > *track = &m_EntityTrack[ index ];
// check if we have at leat one entry
if ( track->Count() <= 0 )
return;
int curr = track->Head();
LagRecord *prevRecord = NULL;
LagRecord *record = NULL;
Vector prevOrg = pEntity->GetLocalOrigin();
// Walk context looking for any invalidating event
while( track->IsValidIndex(curr) )
{
// remember last record
prevRecord = record;
// get next record
record = &track->Element( curr );
if ( !(record->m_fFlags & LC_ALIVE) )
{
// entity must be alive, lost track
return;
}
Vector delta = record->m_vecOrigin - prevOrg;
if ( delta.LengthSqr() > LAG_COMPENSATION_TELEPORTED_DISTANCE_SQR )
{
// lost track, moved too far (may have teleported)
return;
}
// did we find a context smaller than target time ?
if ( record->m_flSimulationTime <= flTargetTime )
break; // hurra, stop
prevOrg = record->m_vecOrigin;
// go one step back in time
curr = track->Next( curr );
}
Assert( record );
if ( !record )
{
if ( sv_unlag_debug.GetBool() )
{
DevMsg( "No valid positions in history for BacktrackEntity ( %s )\n", pEntity->GetClassname() );
}
return; // that should never happen
}
float frac = 0.0f;
if ( prevRecord &&
(record->m_flSimulationTime < flTargetTime) &&
(record->m_flSimulationTime < prevRecord->m_flSimulationTime) )
{
// we didn't find the exact time but have a valid previous record
// so interpolate between these two records;
Assert( prevRecord->m_flSimulationTime > record->m_flSimulationTime );
Assert( flTargetTime < prevRecord->m_flSimulationTime );
// calc fraction between both records
frac = ( flTargetTime - record->m_flSimulationTime ) /
( prevRecord->m_flSimulationTime - record->m_flSimulationTime );
Assert( frac > 0 && frac < 1 ); // should never extrapolate
ang = Lerp( frac, record->m_vecAngles, prevRecord->m_vecAngles );
org = Lerp( frac, record->m_vecOrigin, prevRecord->m_vecOrigin );
mins = Lerp( frac, record->m_vecMins, prevRecord->m_vecMins );
maxs = Lerp( frac, record->m_vecMaxs, prevRecord->m_vecMaxs );
}
else
{
// we found the exact record or no other record to interpolate with
// just copy these values since they are the best we have
ang = record->m_vecAngles;
org = record->m_vecOrigin;
mins = record->m_vecMins;
maxs = record->m_vecMaxs;
}
// See if this is still a valid position for us to teleport to
if ( sv_unlag_fixstuck.GetBool() )
{
// Try to move to the wanted position from our current position.
trace_t tr;
UTIL_TraceEntity( pEntity, org, org, MASK_NPCSOLID, &tr );
if ( tr.startsolid || tr.allsolid )
{
if ( sv_unlag_debug.GetBool() )
DevMsg( "WARNING: BackupEntity trying to back entity into a bad position - %s\n", pEntity->GetClassname() );
CBasePlayer *pHitPlayer = dynamic_cast<CBasePlayer *>( tr.m_pEnt );
// don't lag compensate the current player
if ( pHitPlayer && ( pHitPlayer != m_pCurrentPlayer ) )
{
// If we haven't backtracked this player, do it now
// this deliberately ignores WantsLagCompensationOnEntity.
if ( !m_RestorePlayer.Get( pHitPlayer->entindex() - 1 ) )
{
// prevent recursion - save a copy of m_RestorePlayer,
// pretend that this player is off-limits
int pl_index = pEntity->entindex() - 1;
// Temp turn this flag on
m_RestorePlayer.Set( pl_index );
BacktrackPlayer( pHitPlayer, flTargetTime );
// Remove the temp flag
m_RestorePlayer.Clear( pl_index );
}
}
else
{
CAI_BaseNPC *pHitEntity = dynamic_cast<CAI_BaseNPC *>( tr.m_pEnt );
if ( pHitEntity )
{
CAI_BaseNPC *pNPC = NULL;
CAI_BaseNPC **ppAIs = g_AI_Manager.AccessAIs();
int nAIs = g_AI_Manager.NumAIs();
for ( int i = 0; i < nAIs; i++ ) // we'll have to find this entity's index though :(
{
pNPC = ppAIs[i];
if ( pNPC == pHitEntity )
break;
}
// If we haven't backtracked this player, do it now
// this deliberately ignores WantsLagCompensationOnEntity.
if ( pNPC && !m_RestoreEntity.Get( pNPC->GetAIIndex() ) )
{
// prevent recursion - save a copy of m_RestoreEntity,
// pretend that this player is off-limits
// Temp turn this flag on
m_RestoreEntity.Set( pNPC->GetAIIndex() );
BacktrackEntity( pHitEntity, flTargetTime );
// Remove the temp flag
m_RestoreEntity.Clear( pNPC->GetAIIndex() );
}
}
}
// now trace us back as far as we can go
UTIL_TraceEntity( pEntity, pEntity->GetLocalOrigin(), org, MASK_NPCSOLID, &tr );
if ( tr.startsolid || tr.allsolid )
{
// Our starting position is bogus
if ( sv_unlag_debug.GetBool() )
DevMsg( "Backtrack failed completely, bad starting position\n" );
}
else
{
// We can get to a valid place, but not all the way to the target
Vector vPos;
VectorLerp( pEntity->GetLocalOrigin(), org, tr.fraction * g_flFractionScale, vPos );
// This is as close as we're going to get
org = vPos;
if ( sv_unlag_debug.GetBool() )
DevMsg( "Backtrack got most of the way\n" );
}
}
}
// See if this represents a change for the entity
int flags = 0;
LagRecord *restore = &m_EntityRestoreData[ index ];
LagRecord *change = &m_EntityChangeData[ index ];
QAngle angdiff = pEntity->GetLocalAngles() - ang;
Vector orgdiff = pEntity->GetLocalOrigin() - org;
// Always remember the pristine simulation time in case we need to restore it.
restore->m_flSimulationTime = pEntity->GetSimulationTime();
if ( angdiff.LengthSqr() > LAG_COMPENSATION_EPS_SQR )
{
flags |= LC_ANGLES_CHANGED;
restore->m_vecAngles = pEntity->GetLocalAngles();
pEntity->SetLocalAngles( ang );
change->m_vecAngles = ang;
}
// Use absolute equality here
if ( ( mins != pEntity->WorldAlignMins() ) ||
( maxs != pEntity->WorldAlignMaxs() ) )
{
flags |= LC_SIZE_CHANGED;
restore->m_vecMins = pEntity->WorldAlignMins() ;
restore->m_vecMaxs = pEntity->WorldAlignMaxs();
pEntity->SetSize( mins, maxs );
change->m_vecMins = mins;
change->m_vecMaxs = maxs;
}
// Note, do origin at end since it causes a relink into the k/d tree
if ( orgdiff.LengthSqr() > LAG_COMPENSATION_EPS_SQR )
{
flags |= LC_ORIGIN_CHANGED;
restore->m_vecOrigin = pEntity->GetLocalOrigin();
pEntity->SetLocalOrigin( org );
change->m_vecOrigin = org;
}
// Sorry for the loss of the optimization for the case of people
// standing still, but you breathe even on the server.
// This is quicker than actually comparing all bazillion floats.
flags |= LC_ANIMATION_CHANGED;
restore->m_masterSequence = pEntity->GetSequence();
restore->m_masterCycle = pEntity->GetCycle();
bool interpolationAllowed = false;
if( prevRecord && (record->m_masterSequence == prevRecord->m_masterSequence) )
{
// If the master state changes, all layers will be invalid too, so don't interp (ya know, interp barely ever happens anyway)
interpolationAllowed = true;
}
////////////////////////
// First do the master settings
bool interpolatedMasters = false;
if( frac > 0.0f && interpolationAllowed )
{
interpolatedMasters = true;
pEntity->SetSequence( Lerp( frac, record->m_masterSequence, prevRecord->m_masterSequence ) );
pEntity->SetCycle( Lerp( frac, record->m_masterCycle, prevRecord->m_masterCycle ) );
if( record->m_masterCycle > prevRecord->m_masterCycle )
{
// the older record is higher in frame than the newer, it must have wrapped around from 1 back to 0
// add one to the newer so it is lerping from .9 to 1.1 instead of .9 to .1, for example.
float newCycle = Lerp( frac, record->m_masterCycle, prevRecord->m_masterCycle + 1 );
pEntity->SetCycle(newCycle < 1 ? newCycle : newCycle - 1 );// and make sure .9 to 1.2 does not end up 1.05
}
else
{
pEntity->SetCycle( Lerp( frac, record->m_masterCycle, prevRecord->m_masterCycle ) );
}
}
if( !interpolatedMasters )
{
pEntity->SetSequence(record->m_masterSequence);
pEntity->SetCycle(record->m_masterCycle);
}
////////////////////////
// Now do all the layers
int layerCount = pEntity->GetNumAnimOverlays();
for( int layerIndex = 0; layerIndex < layerCount; ++layerIndex )
{
CAnimationLayer *currentLayer = pEntity->GetAnimOverlay(layerIndex);
if( currentLayer )
{
restore->m_layerRecords[layerIndex].m_cycle = currentLayer->m_flCycle;
restore->m_layerRecords[layerIndex].m_order = currentLayer->m_nOrder;
restore->m_layerRecords[layerIndex].m_sequence = currentLayer->m_nSequence;
restore->m_layerRecords[layerIndex].m_weight = currentLayer->m_flWeight;
bool interpolated = false;
if( (frac > 0.0f) && interpolationAllowed )
{
LayerRecord &recordsLayerRecord = record->m_layerRecords[layerIndex];
LayerRecord &prevRecordsLayerRecord = prevRecord->m_layerRecords[layerIndex];
if( (recordsLayerRecord.m_order == prevRecordsLayerRecord.m_order)
&& (recordsLayerRecord.m_sequence == prevRecordsLayerRecord.m_sequence)
)
{
// We can't interpolate across a sequence or order change
interpolated = true;
if( recordsLayerRecord.m_cycle > prevRecordsLayerRecord.m_cycle )
{
// the older record is higher in frame than the newer, it must have wrapped around from 1 back to 0
// add one to the newer so it is lerping from .9 to 1.1 instead of .9 to .1, for example.
float newCycle = Lerp( frac, recordsLayerRecord.m_cycle, prevRecordsLayerRecord.m_cycle + 1 );
currentLayer->m_flCycle = newCycle < 1 ? newCycle : newCycle - 1;// and make sure .9 to 1.2 does not end up 1.05
}
else
{
currentLayer->m_flCycle = Lerp( frac, recordsLayerRecord.m_cycle, prevRecordsLayerRecord.m_cycle );
}
currentLayer->m_nOrder = recordsLayerRecord.m_order;
currentLayer->m_nSequence = recordsLayerRecord.m_sequence;
currentLayer->m_flWeight = Lerp( frac, recordsLayerRecord.m_weight, prevRecordsLayerRecord.m_weight );
}
}
if( !interpolated )
{
//Either no interp, or interp failed. Just use record.
currentLayer->m_flCycle = record->m_layerRecords[layerIndex].m_cycle;
currentLayer->m_nOrder = record->m_layerRecords[layerIndex].m_order;
currentLayer->m_nSequence = record->m_layerRecords[layerIndex].m_sequence;
currentLayer->m_flWeight = record->m_layerRecords[layerIndex].m_weight;
}
}
}
if ( !flags )
return; // we didn't change anything
if ( sv_lagflushbonecache.GetBool() )
pEntity->InvalidateBoneCache();
/*char text[256]; Q_snprintf( text, sizeof(text), "time %.2f", flTargetTime );
pEntity->DrawServerHitboxes( 10 );
NDebugOverlay::Text( org, text, false, 10 );
NDebugOverlay::EntityBounds( pEntity, 255, 0, 0, 32, 10 ); */
m_RestoreEntity.Set( index ); //remember that we changed this entity
m_bNeedToRestore = true; // we changed at least one player / entity
restore->m_fFlags = flags; // we need to restore these flags
change->m_fFlags = flags; // we have changed these flags
if( sv_showlagcompensation.GetInt() == 1 )
{
pEntity->DrawServerHitboxes(4, true);
}
}
