- Global SH_Xrotate90 (shtns_cfg shtns, cplx *Qlm, cplx *Rlm)
- Rotate SH representation around X axis by 90 degrees.
- Global SH_Yrotate (shtns_cfg shtns, cplx *Qlm, double alpha, cplx *Rlm)
- Rotate SH representation around Y axis by alpha (in radians).
- Global SH_Yrotate90 (shtns_cfg shtns, cplx *Qlm, cplx *Rlm)
- Rotate SH representation around Y axis by 90 degrees.