diff options
Diffstat (limited to 'Alc/ALu.c')
| -rw-r--r-- | Alc/ALu.c | 12 |
1 files changed, 10 insertions, 2 deletions
@@ -1215,6 +1215,9 @@ static void CalcAttnSourceParams(ALvoice *voice, const struct ALvoiceProps *prop else if(SendSlots[i]->Params.AuxSendAuto) { RoomRolloff[i] = SendSlots[i]->Params.RoomRolloff + props->RoomRolloffFactor; + /* Calculate the distances to where this effect's decay reaches + * -60dB. + */ DecayDistance[i] = SendSlots[i]->Params.DecayTime * Listener->Params.ReverbSpeedOfSound; DecayHFDistance[i] = DecayDistance[i] * SendSlots[i]->Params.DecayHFRatio; @@ -1223,8 +1226,13 @@ static void CalcAttnSourceParams(ALvoice *voice, const struct ALvoiceProps *prop ALfloat airAbsorption = SendSlots[i]->Params.AirAbsorptionGainHF; if(airAbsorption < 1.0f) { - ALfloat limitRatio = log10f(REVERB_DECAY_GAIN) / log10f(airAbsorption); - DecayHFDistance[i] = minf(limitRatio, DecayHFDistance[i]); + /* Calculate the distance to where this effect's air + * absorption reaches -60dB, and limit the effect's HF + * decay distance (so it doesn't take any longer to decay + * than the air would allow). + */ + ALfloat absorb_dist = log10f(REVERB_DECAY_GAIN) / log10f(airAbsorption); + DecayHFDistance[i] = minf(absorb_dist, DecayHFDistance[i]); } } } |