diff options
| -rw-r--r-- | alc/alu.cpp | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/alc/alu.cpp b/alc/alu.cpp index b337286b..1e6e7d07 100644 --- a/alc/alu.cpp +++ b/alc/alu.cpp @@ -527,6 +527,15 @@ inline float ScaleAzimuthFront(float azimuth, float scale) return azimuth; } +/* Wraps the given value in radians to stay between [-pi,+pi] */ +inline float WrapRadians(float r) +{ + constexpr float Pi{al::MathDefs<float>::Pi()}; + constexpr float Pi2{al::MathDefs<float>::Tau()}; + if(r > Pi) return std::fmod(Pi+r, Pi2) - Pi; + if(r < -Pi) return Pi - std::fmod(Pi-r, Pi2); + return r; +} /* Begin ambisonic rotation helpers. * @@ -750,9 +759,11 @@ void CalcPanningAndFilters(ALvoice *voice, const ALfloat xpos, const ALfloat ypo case FmtStereo: if(DirectChannels == DirectMode::Off) { - /* Convert counter-clockwise to clockwise. */ - StereoMap[0].angle = -props->StereoPan[0]; - StereoMap[1].angle = -props->StereoPan[1]; + /* Convert counter-clockwise to clock-wise, and wrap between + * [-pi,+pi]. + */ + StereoMap[0].angle = WrapRadians(-props->StereoPan[0]); + StereoMap[1].angle = WrapRadians(-props->StereoPan[1]); } chans = StereoMap; |