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/macosx-10.10.1/OpenAL-54/Source/OpenAL/
H A DoalSource.cpp3879 Float32 coneDirection[3]; local
3890 coneDirection[0] = mConeDirection[0];
3891 coneDirection[1] = mConeDirection[1];
3892 coneDirection[2] = mConeDirection[2];
3893 aluNormalize(coneDirection); // Normalized cone direction vector
3896 angle = 180.0 * acos (aluDotproduct(vsl, coneDirection))/M_PI; // convert from radians to degrees

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