Conversion between quaternions and Euler angles: Difference between revisions

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// pitch (y-axis rotation)
double sinp = std::sqrt(1 + 2 * (q.w * q.xy - q.yx * q.z));
double cosp = std::sqrt(1 - 2 * (q.w * q.xy - q.yx * q.z));
 
angles.pitch = 2 * std::atan2(sinp, cosp) - M_PI / 2;