void FTemporalLODState::UpdateTemporalLODTransition(const FViewInfo& View, float LastRenderTime)
{
bool bOk = false;
if (!View.bDisableDistanceBasedFadeTransitions)
{
bOk = true;
TemporalLODLag = CVarLODTemporalLag.GetValueOnRenderThread();
if (TemporalLODTime[1] < LastRenderTime - TemporalLODLag)
{
if (TemporalLODTime[0] < TemporalLODTime[1])
{
TemporalLODViewOrigin[0] = TemporalLODViewOrigin[1];
TemporalDistanceFactor[0] = TemporalDistanceFactor[1];
TemporalLODTime[0] = TemporalLODTime[1];
}
TemporalLODViewOrigin[1] = View.ViewMatrices.ViewOrigin;
TemporalDistanceFactor[1] = View.GetLODDistanceFactor();
TemporalLODTime[1] = LastRenderTime;
if (TemporalLODTime[1] <= TemporalLODTime[0])
{
bOk = false; // we are paused or something or otherwise didn't get a good sample
}
}
}
if (!bOk)
{
TemporalLODViewOrigin[0] = View.ViewMatrices.ViewOrigin;
TemporalLODViewOrigin[1] = View.ViewMatrices.ViewOrigin;
TemporalDistanceFactor[0] = View.GetLODDistanceFactor();
TemporalDistanceFactor[1] = TemporalDistanceFactor[0];
TemporalLODTime[0] = LastRenderTime;
TemporalLODTime[1] = LastRenderTime;
TemporalLODLag = 0.0f;
}
}
