diff options
Diffstat (limited to 'indra/llmath/llquaternion.cpp')
| -rw-r--r-- | indra/llmath/llquaternion.cpp | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/indra/llmath/llquaternion.cpp b/indra/llmath/llquaternion.cpp index dcef2b345e..a8d9eba2a0 100644 --- a/indra/llmath/llquaternion.cpp +++ b/indra/llmath/llquaternion.cpp @@ -864,6 +864,26 @@ void LLQuaternion::getAngleAxis(F32* angle, LLVector3 &vec) const } } +const LLQuaternion& LLQuaternion::setFromAzimuthAndAltitude(F32 azimuthRadians, F32 altitudeRadians) +{ + // euler angle inputs are complements of azimuth/altitude which are measured from zenith + F32 pitch = llclamp(F_PI_BY_TWO - altitudeRadians, 0.0f, F_PI_BY_TWO); + F32 yaw = llclamp(F_PI_BY_TWO - azimuthRadians, 0.0f, F_PI_BY_TWO); + setEulerAngles(0.0f, pitch, yaw); + return *this; +} + +void LLQuaternion::getAzimuthAndAltitude(F32 &azimuthRadians, F32 &altitudeRadians) +{ + F32 rick_roll; + F32 pitch; + F32 yaw; + getEulerAngles(&rick_roll, &pitch, &yaw); + // make these measured from zenith + altitudeRadians = llclamp(F_PI_BY_TWO - pitch, 0.0f, F_PI_BY_TWO); + azimuthRadians = llclamp(F_PI_BY_TWO - yaw, 0.0f, F_PI_BY_TWO); +} + // quaternion does not need to be normalized void LLQuaternion::getEulerAngles(F32 *roll, F32 *pitch, F32 *yaw) const { |