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Store the original pre-clamped distance instead of re-computing it

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This commit is contained in:
Chris Robinson 2009-12-08 10:12:18 -08:00
parent 5170e251f9
commit 1694e5bd12
1 changed files with 3 additions and 4 deletions
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7
Alc/ALu.c
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@ -408,7 +408,7 @@ ALvoid aluInitPanning(ALCcontext *Context)
static ALvoid CalcSourceParams(const ALCcontext *ALContext, ALsource *ALSource,
ALboolean isMono)
{
ALfloat InnerAngle,OuterAngle,Angle,Distance,DryMix;
ALfloat InnerAngle,OuterAngle,Angle,Distance,DryMix,OrigDist;
ALfloat Direction[3],Position[3],SourceToListener[3];
ALfloat Velocity[3],ListenerVel[3];
ALfloat MinVolume,MaxVolume,MinDist,MaxDist,Rolloff,OuterGainHF;
@ -584,6 +584,7 @@ static ALvoid CalcSourceParams(const ALCcontext *ALContext, ALsource *ALSource,
//2. Calculate distance attenuation
Distance = aluSqrt(aluDotproduct(Position, Position));
OrigDist = Distance;
flAttenuation = 1.0f;
for(i = 0;i < NumSends;i++)
@ -808,9 +809,7 @@ static ALvoid CalcSourceParams(const ALCcontext *ALContext, ALsource *ALSource,
ALSource->Params.Pitch = ALSource->flPitch;
// Use energy-preserving panning algorithm for multi-speaker playback
length = aluSqrt(Position[0]*Position[0] + Position[1]*Position[1] +
Position[2]*Position[2]);
length = __max(length, MinDist);
length = __max(OrigDist, MinDist);
if(length > 0.0f)
{
ALfloat invlen = 1.0f/length;