fn combine<const DERIVATIVES: bool>(
[n, m]: &[VectorWave; 2],
normalization: Complex,
[weight_n, weight_m]: [f64; 2],
) -> VectorWaveExpand description
The wave normalization (weight_n N + weight_m M) of the value and requested
derivatives. The part m from spherical_parts is -M, so it enters with a
minus sign.