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compute correct time-of-flight for extrapolation

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This commit is contained in:
Andrew Meadows 2015-05-28 14:24:39 -07:00
parent 0c6de897f5
commit 7be16da1a8
1 changed files with 20 additions and 13 deletions
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33
libraries/entities/src/EntityItem.cpp
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@ -480,17 +480,21 @@ int EntityItem::readEntityDataFromBuffer(const unsigned char* data, int bytesLef
bytesRead += encodedUpdateDelta.size();
// Newer bitstreams will have a last simulated and a last updated value
quint64 lastSimulatedFromBufferAdjusted = now;
if (args.bitstreamVersion >= VERSION_ENTITIES_HAS_LAST_SIMULATED_TIME) {
// last simulated is stored as ByteCountCoded delta from lastEdited
QByteArray encodedSimulatedDelta = originalDataBuffer.mid(bytesRead); // maximum possible size
ByteCountCoded<quint64> simulatedDeltaCoder = encodedSimulatedDelta;
quint64 simulatedDelta = simulatedDeltaCoder;
if (overwriteLocalData) {
_lastSimulated = lastEditedFromBufferAdjusted + simulatedDelta; // don't adjust for clock skew since we already did that
lastSimulatedFromBufferAdjusted = lastEditedFromBufferAdjusted + simulatedDelta; // don't adjust for clock skew since we already did that
if (lastSimulatedFromBufferAdjusted > now) {
lastSimulatedFromBufferAdjusted = now;
}
#ifdef WANT_DEBUG
qCDebug(entities) << " _lastSimulated:" << debugTime(_lastSimulated, now);
qCDebug(entities) << " _lastEdited:" << debugTime(_lastEdited, now);
qCDebug(entities) << " lastEditedFromBufferAdjusted:" << debugTime(lastEditedFromBufferAdjusted, now);
qCDebug(entities) << " lastSimulatedFromBufferAdjusted:" << debugTime(lastSimulatedFromBufferAdjusted, now);
#endif
}
encodedSimulatedDelta = simulatedDeltaCoder; // determine true length
@ -606,8 +610,8 @@ int EntityItem::readEntityDataFromBuffer(const unsigned char* data, int bytesLef
// use our simulation helper routine to get a best estimate of where the entity should be.
const float MIN_TIME_SKIP = 0.0f;
const float MAX_TIME_SKIP = 1.0f; // in seconds
float skipTimeForward = glm::clamp((float)(now - _lastSimulated) / (float)(USECS_PER_SECOND),
MIN_TIME_SKIP, MAX_TIME_SKIP);
float skipTimeForward = glm::clamp((float)(now - lastSimulatedFromBufferAdjusted) / (float)(USECS_PER_SECOND),
MIN_TIME_SKIP, MAX_TIME_SKIP);
if (skipTimeForward > 0.0f) {
#ifdef WANT_DEBUG
qCDebug(entities) << "skipTimeForward:" << skipTimeForward;
@ -617,19 +621,22 @@ int EntityItem::readEntityDataFromBuffer(const unsigned char* data, int bytesLef
// we don't want the side effect of flag setting.
simulateKinematicMotion(skipTimeForward, false);
}
_lastSimulated = now;
}
auto nodeList = DependencyManager::get<NodeList>();
const QUuid& myNodeID = nodeList->getSessionUUID();
if (overwriteLocalData && _simulatorID == myNodeID && !_simulatorID.isNull()) {
// we own the simulation, so we keep our transform+velocities and remove any related dirty flags
// rather than accept the values in the packet
_position = savePosition;
_rotation = saveRotation;
_velocity = saveVelocity;
_angularVelocity = saveAngularVelocity;
_dirtyFlags &= ~(EntityItem::DIRTY_TRANSFORM | EntityItem::DIRTY_VELOCITIES);
if (overwriteLocalData) {
if (_simulatorID == myNodeID && !_simulatorID.isNull()) {
// we own the simulation, so we keep our transform+velocities and remove any related dirty flags
// rather than accept the values in the packet
_position = savePosition;
_rotation = saveRotation;
_velocity = saveVelocity;
_angularVelocity = saveAngularVelocity;
_dirtyFlags &= ~(EntityItem::DIRTY_TRANSFORM | EntityItem::DIRTY_VELOCITIES);
} else {
_lastSimulated = now;
}
}
return bytesRead;