diff options
| -rw-r--r-- | Alc/ALu.c | 22 |
1 files changed, 11 insertions, 11 deletions
@@ -628,20 +628,20 @@ static ALvoid CalcSourceParams(const ALCcontext *ALContext, ALsource *ALSource, } // Distance-based air absorption - if(ALSource->AirAbsorptionFactor > 0.0f) + if(ALSource->AirAbsorptionFactor > 0.0f && ALSource->DistanceModel != AL_NONE) { - ALfloat amount = AIRABSORBGAINDBHF * ALSource->AirAbsorptionFactor * - MetersPerUnit; + ALfloat dist = Distance-MinDist; ALfloat absorb; - // Convert a -6dB rolloff into a -0.05dB rolloff - absorb = pow(10.0f, log10(flAttenuation) * amount / -6.0f); - if(absorb < 1.0f) - { - DryGainHF *= absorb; - for(i = 0;i < MAX_SENDS;i++) - WetGainHF[i] *= absorb; - } + if(dist < 0.0f) dist = 0.0f; + // Absorption calculation is done in dB + absorb = (ALSource->AirAbsorptionFactor*AIRABSORBGAINDBHF) * + (dist*MetersPerUnit); + // Convert dB to linear gain before applying + absorb = pow(10.0, absorb/20.0); + DryGainHF *= absorb; + for(i = 0;i < MAX_SENDS;i++) + WetGainHF[i] *= absorb; } //3. Apply directional soundcones |