diff options
Diffstat (limited to 'Alc')
| -rw-r--r-- | Alc/ALu.c | 55 |
1 files changed, 31 insertions, 24 deletions
@@ -110,14 +110,15 @@ static __inline ALvoid aluNormalize(ALfloat *inVector) } } -static __inline ALvoid aluMatrixVector(ALfloat *vector,ALfloat matrix[3][3]) +static __inline ALvoid aluMatrixVector(ALfloat *vector,ALfloat w,ALfloat matrix[4][4]) { - ALfloat result[3]; + ALfloat temp[4] = { + vector[0], vector[1], vector[2], w + }; - result[0] = vector[0]*matrix[0][0] + vector[1]*matrix[1][0] + vector[2]*matrix[2][0]; - result[1] = vector[0]*matrix[0][1] + vector[1]*matrix[1][1] + vector[2]*matrix[2][1]; - result[2] = vector[0]*matrix[0][2] + vector[1]*matrix[1][2] + vector[2]*matrix[2][2]; - memcpy(vector, result, sizeof(result)); + vector[0] = temp[0]*matrix[0][0] + temp[1]*matrix[1][0] + temp[2]*matrix[2][0] + temp[3]*matrix[3][0]; + vector[1] = temp[0]*matrix[0][1] + temp[1]*matrix[1][1] + temp[2]*matrix[2][1] + temp[3]*matrix[3][1]; + vector[2] = temp[0]*matrix[0][2] + temp[1]*matrix[1][2] + temp[2]*matrix[2][2] + temp[3]*matrix[3][2]; } static ALvoid SetSpeakerArrangement(const char *name, ALfloat SpeakerAngle[OUTPUTCHANNELS], @@ -408,7 +409,7 @@ static ALvoid CalcSourceParams(const ALCcontext *ALContext, ALsource *ALSource, ALfloat MinVolume,MaxVolume,MinDist,MaxDist,Rolloff,OuterGainHF; ALfloat ConeVolume,ConeHF,SourceVolume,ListenerGain; ALfloat DopplerFactor, DopplerVelocity, flSpeedOfSound; - ALfloat Matrix[3][3]; + ALfloat Matrix[4][4]; ALfloat flAttenuation; ALfloat RoomAttenuation[MAX_SENDS]; ALfloat MetersPerUnit; @@ -503,29 +504,35 @@ static ALvoid CalcSourceParams(const ALCcontext *ALContext, ALsource *ALSource, //1. Translate Listener to origin (convert to head relative) if(ALSource->bHeadRelative==AL_FALSE) { - ALfloat U[3],V[3],N[3]; + ALfloat U[3],V[3],N[3],P[3]; // Build transform matrix - aluCrossproduct(ALContext->Listener.Forward, ALContext->Listener.Up, U); // Right-vector - aluNormalize(U); // Normalized Right-vector - memcpy(V, ALContext->Listener.Up, sizeof(V)); // Up-vector - aluNormalize(V); // Normalized Up-vector memcpy(N, ALContext->Listener.Forward, sizeof(N)); // At-vector aluNormalize(N); // Normalized At-vector - Matrix[0][0] = U[0]; Matrix[0][1] = V[0]; Matrix[0][2] = -N[0]; - Matrix[1][0] = U[1]; Matrix[1][1] = V[1]; Matrix[1][2] = -N[1]; - Matrix[2][0] = U[2]; Matrix[2][1] = V[2]; Matrix[2][2] = -N[2]; - - // Translate source position into listener space - Position[0] -= ALContext->Listener.Position[0]; - Position[1] -= ALContext->Listener.Position[1]; - Position[2] -= ALContext->Listener.Position[2]; + memcpy(V, ALContext->Listener.Up, sizeof(V)); // Up-vector + aluNormalize(V); // Normalized Up-vector + aluCrossproduct(N, V, U); // Right-vector + aluNormalize(U); // Normalized Right-vector + P[0] = -(ALContext->Listener.Position[0]*U[0] + // Translation + ALContext->Listener.Position[1]*U[1] + + ALContext->Listener.Position[2]*U[2]); + P[1] = -(ALContext->Listener.Position[0]*V[0] + + ALContext->Listener.Position[1]*V[1] + + ALContext->Listener.Position[2]*V[2]); + P[2] = -(ALContext->Listener.Position[0]*-N[0] + + ALContext->Listener.Position[1]*-N[1] + + ALContext->Listener.Position[2]*-N[2]); + Matrix[0][0] = U[0]; Matrix[0][1] = V[0]; Matrix[0][2] = -N[0]; Matrix[0][3] = 0.0f; + Matrix[1][0] = U[1]; Matrix[1][1] = V[1]; Matrix[1][2] = -N[1]; Matrix[1][3] = 0.0f; + Matrix[2][0] = U[2]; Matrix[2][1] = V[2]; Matrix[2][2] = -N[2]; Matrix[2][3] = 0.0f; + Matrix[3][0] = P[0]; Matrix[3][1] = P[1]; Matrix[3][2] = P[2]; Matrix[3][3] = 1.0f; + // Transform source position and direction into listener space - aluMatrixVector(Position, Matrix); - aluMatrixVector(Direction, Matrix); + aluMatrixVector(Position, 1.0f, Matrix); + aluMatrixVector(Direction, 0.0f, Matrix); // Transform source and listener velocity into listener space - aluMatrixVector(Velocity, Matrix); - aluMatrixVector(ListenerVel, Matrix); + aluMatrixVector(Velocity, 0.0f, Matrix); + aluMatrixVector(ListenerVel, 0.0f, Matrix); } else ListenerVel[0] = ListenerVel[1] = ListenerVel[2] = 0.0f; |