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handle throttle render case and clean up code logic to be more obvious

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This commit is contained in:
ZappoMan 2015-03-25 15:48:50 -07:00
parent 0c2a630a59
commit 68e730af45
2 changed files with 27 additions and 21 deletions
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46
interface/src/LODManager.cpp
View file

@ -50,6 +50,7 @@ void LODManager::autoAdjustLOD(float currentFPS) {
currentFPS = ASSUMED_FPS;
_lastUpShift = _lastDownShift = usecTimestampNow();
}
_fpsAverageStartWindow.updateAverage(currentFPS);
_fpsAverageDownWindow.updateAverage(currentFPS);
_fpsAverageUpWindow.updateAverage(currentFPS);
@ -64,12 +65,17 @@ void LODManager::autoAdjustLOD(float currentFPS) {
if (_automaticLODAdjust) {
// LOD Downward adjustment
// If our last adjust was an upshift, then we don't want to consider any downshifts until we've delayed at least
// our START_DELAY_WINDOW_IN_SECS
bool doDownShift = _lastAdjustWasUpShift
? (elapsedSinceUpShift > START_SHIFT_ELPASED && _fpsAverageStartWindow.getAverage() < getLODDecreaseFPS())
: (elapsedSinceDownShift > DOWN_SHIFT_ELPASED && _fpsAverageDownWindow.getAverage() < getLODDecreaseFPS());
// If we've been downshifting, we watch a shorter downshift window so that we will quickly move toward our
// target frame rate. But if we haven't just done a downshift (either because our last shift was an upshift,
// or because we've just started out) then we look at a much longer window to consider whether or not to start
// downshifting.
bool doDownShift = false;
if (_isDownshifting) {
doDownShift = (elapsedSinceDownShift > DOWN_SHIFT_ELPASED && _fpsAverageDownWindow.getAverage() < getLODDecreaseFPS());
} else {
doDownShift = (elapsedSinceUpShift > START_SHIFT_ELPASED && _fpsAverageStartWindow.getAverage() < getLODDecreaseFPS());
}
if (doDownShift) {
@ -83,24 +89,26 @@ void LODManager::autoAdjustLOD(float currentFPS) {
}
if (changed) {
if (_lastAdjustWasUpShift) {
qDebug() << "adjusting LOD DOWN after initial delay..."
<< "average fps for last "<< START_DELAY_WINDOW_IN_SECS <<"seconds was "
<< _fpsAverageStartWindow.getAverage()
<< "minimum is:" << getLODDecreaseFPS()
<< "elapsedSinceUpShift:" << elapsedSinceUpShift
<< " NEW _octreeSizeScale=" << _octreeSizeScale;
} else {
if (_isDownshifting) {
// subsequent downshift
qDebug() << "adjusting LOD DOWN..."
<< "average fps for last "<< DOWN_SHIFT_WINDOW_IN_SECS <<"seconds was "
<< _fpsAverageDownWindow.getAverage()
<< "minimum is:" << getLODDecreaseFPS()
<< "elapsedSinceDownShift:" << elapsedSinceDownShift
<< " NEW _octreeSizeScale=" << _octreeSizeScale;
} else {
// first downshift
qDebug() << "adjusting LOD DOWN after initial delay..."
<< "average fps for last "<< START_DELAY_WINDOW_IN_SECS <<"seconds was "
<< _fpsAverageStartWindow.getAverage()
<< "minimum is:" << getLODDecreaseFPS()
<< "elapsedSinceUpShift:" << elapsedSinceUpShift
<< " NEW _octreeSizeScale=" << _octreeSizeScale;
}
_lastDownShift = now;
_lastAdjustWasUpShift = false;
_isDownshifting = true;
emit LODDecreased();
}
@ -130,7 +138,7 @@ void LODManager::autoAdjustLOD(float currentFPS) {
<< " NEW _octreeSizeScale=" << _octreeSizeScale;
_lastUpShift = now;
_lastAdjustWasUpShift = true;
_isDownshifting = false;
emit LODIncreased();
}
@ -149,13 +157,11 @@ void LODManager::autoAdjustLOD(float currentFPS) {
}
void LODManager::resetLODAdjust() {
// TODO: Do we need this???
/*
_fpsAverageStartWindow.reset();
_fpsAverageDownWindow.reset();
_fpsAverageUpWindow.reset();
_lastAdjust = usecTimestampNow();
*/
_lastUpShift = _lastDownShift = usecTimestampNow();
_isDownshifting = false;
}
QString LODManager::getLODFeedbackText() {

2
interface/src/LODManager.h
View file

@ -107,7 +107,7 @@ private:
quint64 _lastDownShift = 0;
quint64 _lastUpShift = 0;
bool _lastAdjustWasUpShift = true; // start out as if we've just upshifted
bool _isDownshifting = false; // start out as if we're not downshifting
SimpleMovingAverage _fpsAverageStartWindow = START_DELAY_SAMPLES_OF_FRAMES;
SimpleMovingAverage _fpsAverageDownWindow = DOWN_SHIFT_SAMPLES_OF_FRAMES;