diff options
Diffstat (limited to 'Alc')
| -rw-r--r-- | Alc/ALu.c | 48 |
1 files changed, 22 insertions, 26 deletions
@@ -404,9 +404,9 @@ static ALvoid CalcSourceParams(const ALCcontext *ALContext, ALsource *ALSource, { ALfloat InnerAngle,OuterAngle,Angle,Distance,DryMix; ALfloat Direction[3],Position[3],SourceToListener[3]; + ALfloat Velocity[3],ListenerVel[3]; ALfloat MinVolume,MaxVolume,MinDist,MaxDist,Rolloff,OuterGainHF; ALfloat ConeVolume,ConeHF,SourceVolume,ListenerGain; - ALfloat U[3],V[3],N[3]; ALfloat DopplerFactor, DopplerVelocity, flSpeedOfSound; ALfloat Matrix[3][3]; ALfloat flAttenuation; @@ -434,11 +434,13 @@ static ALvoid CalcSourceParams(const ALCcontext *ALContext, ALsource *ALSource, //Get listener properties ListenerGain = ALContext->Listener.Gain; MetersPerUnit = ALContext->Listener.MetersPerUnit; + memcpy(ListenerVel, ALContext->Listener.Velocity, sizeof(ALContext->Listener.Velocity)); //Get source properties SourceVolume = ALSource->flGain; memcpy(Position, ALSource->vPosition, sizeof(ALSource->vPosition)); memcpy(Direction, ALSource->vOrientation, sizeof(ALSource->vOrientation)); + memcpy(Velocity, ALSource->vVelocity, sizeof(ALSource->vVelocity)); MinVolume = ALSource->flMinGain; MaxVolume = ALSource->flMaxGain; MinDist = ALSource->flRefDistance; @@ -499,12 +501,10 @@ static ALvoid CalcSourceParams(const ALCcontext *ALContext, ALsource *ALSource, } //1. Translate Listener to origin (convert to head relative) - // Note that Direction and SourceToListener are *not* transformed. - // SourceToListener is used with the source and listener velocities, - // which are untransformed, and Direction is used with SourceToListener - // for the sound cone if(ALSource->bHeadRelative==AL_FALSE) { + ALfloat U[3],V[3],N[3]; + // Build transform matrix aluCrossproduct(ALContext->Listener.Forward, ALContext->Listener.Up, U); // Right-vector aluNormalize(U); // Normalized Right-vector @@ -520,20 +520,19 @@ static ALvoid CalcSourceParams(const ALCcontext *ALContext, ALsource *ALSource, Position[0] -= ALContext->Listener.Position[0]; Position[1] -= ALContext->Listener.Position[1]; Position[2] -= ALContext->Listener.Position[2]; - - SourceToListener[0] = -Position[0]; - SourceToListener[1] = -Position[1]; - SourceToListener[2] = -Position[2]; - - // Transform source position into listener space + // Transform source position and direction into listener space aluMatrixVector(Position, Matrix); + aluMatrixVector(Direction, Matrix); + // Transform source and listener velocity into listener space + aluMatrixVector(Velocity, Matrix); + aluMatrixVector(ListenerVel, Matrix); } else - { - SourceToListener[0] = -Position[0]; - SourceToListener[1] = -Position[1]; - SourceToListener[2] = -Position[2]; - } + ListenerVel[0] = ListenerVel[1] = ListenerVel[2] = 0.0f; + + SourceToListener[0] = -Position[0]; + SourceToListener[1] = -Position[1]; + SourceToListener[2] = -Position[2]; aluNormalize(SourceToListener); aluNormalize(Direction); @@ -666,24 +665,21 @@ static ALvoid CalcSourceParams(const ALCcontext *ALContext, ALsource *ALSource, //4. Calculate Velocity if(DopplerFactor != 0.0f) { - ALfloat flVSS, flVLS = 0.0f; + ALfloat flVSS, flVLS; ALfloat flMaxVelocity = (DopplerVelocity * flSpeedOfSound) / DopplerFactor; - flVSS = aluDotproduct(ALSource->vVelocity, SourceToListener); + flVSS = aluDotproduct(Velocity, SourceToListener); if(flVSS >= flMaxVelocity) flVSS = (flMaxVelocity - 1.0f); else if(flVSS <= -flMaxVelocity) flVSS = -flMaxVelocity + 1.0f; - if(ALSource->bHeadRelative == AL_FALSE) - { - flVLS = aluDotproduct(ALContext->Listener.Velocity, SourceToListener); - if(flVLS >= flMaxVelocity) - flVLS = (flMaxVelocity - 1.0f); - else if(flVLS <= -flMaxVelocity) - flVLS = -flMaxVelocity + 1.0f; - } + flVLS = aluDotproduct(ListenerVel, SourceToListener); + if(flVLS >= flMaxVelocity) + flVLS = (flMaxVelocity - 1.0f); + else if(flVLS <= -flMaxVelocity) + flVLS = -flMaxVelocity + 1.0f; ALSource->Params.Pitch = ALSource->flPitch * ((flSpeedOfSound * DopplerVelocity) - (DopplerFactor * flVLS)) / |