This feature allows for phase sampling in the filters derived from FieldConvert filter. Time can be written as t = mT + nT, with m number of periods elapsed, T period and n phase (0 <= n <= 1). By selecting T and n, phase averaging can be carried out.
- Add test
- Test all possible configurations to make sure the right number of samples is taken even when the timestep falls in the middle of the interval
- Change logic introducing a flag to turn on the feature and document it