fn spherical_coefficient<const N: usize>(
mode: Mode,
prefactor: Complex,
vector: [Complex; 3],
direction: &Direction<N>,
pol: u8,
helicity: bool,
) -> Jet<N>Expand description
The coefficient of mode in the regular expansion of a unit plane wave of
polarization pol, without the position phase: the prefactor times
exp(-i m phi) times the polarized angular function of theta.