From 8a0e15ff37b3eb8e010b9da32d85120e4ef2e8cc Mon Sep 17 00:00:00 2001 From: Chris Robinson Date: Sun, 12 Sep 2010 00:10:33 -0700 Subject: [PATCH] Store air absorption factor locally --- Alc/ALu.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/Alc/ALu.c b/Alc/ALu.c index 5f104991..d54b9f09 100644 --- a/Alc/ALu.c +++ b/Alc/ALu.c @@ -264,6 +264,7 @@ ALvoid CalcSourceParams(ALsource *ALSource, const ALCcontext *ALContext) ALfloat MinVolume,MaxVolume,MinDist,MaxDist,Rolloff,OuterGainHF; ALfloat ConeVolume,ConeHF,SourceVolume,ListenerGain; ALfloat DopplerFactor, DopplerVelocity, flSpeedOfSound; + ALfloat AirAbsorptionFactor; ALbufferlistitem *BufferListItem; ALfloat Matrix[4][4]; ALfloat flAttenuation, effectiveDist; @@ -310,6 +311,7 @@ ALvoid CalcSourceParams(ALsource *ALSource, const ALCcontext *ALContext) InnerAngle = ALSource->flInnerAngle; OuterAngle = ALSource->flOuterAngle; OuterGainHF = ALSource->OuterGainHF; + AirAbsorptionFactor = ALSource->AirAbsorptionFactor; //1. Translate Listener to origin (convert to head relative) if(ALSource->bHeadRelative==AL_FALSE) @@ -432,12 +434,12 @@ ALvoid CalcSourceParams(ALsource *ALSource, const ALCcontext *ALContext) effectiveDist = (MinDist/flAttenuation - MinDist)*MetersPerUnit; // Distance-based air absorption - if(ALSource->AirAbsorptionFactor > 0.0f && effectiveDist > 0.0f) + if(AirAbsorptionFactor > 0.0f && effectiveDist > 0.0f) { ALfloat absorb; // Absorption calculation is done in dB - absorb = (ALSource->AirAbsorptionFactor*AIRABSORBGAINDBHF) * + absorb = (AirAbsorptionFactor*AIRABSORBGAINDBHF) * effectiveDist; // Convert dB to linear gain before applying absorb = aluPow(10.0f, absorb/20.0f); @@ -525,7 +527,7 @@ ALvoid CalcSourceParams(ALsource *ALSource, const ALCcontext *ALContext) WetGainHF[i] *= aluPow(10.0f, log10(Slot->effect.Reverb.AirAbsorptionGainHF) * - ALSource->AirAbsorptionFactor * effectiveDist); + AirAbsorptionFactor * effectiveDist); } } else -- 2.11.4.GIT