# RuAUTD Gain This crate defines Gain of AUTD. Gain calculates and contains the amplitude and phase of each transducer in the AUTD. This crate contains following primitive Gains. * FocalPointGain: generate single focal point * PlaneWaveGain: generate a plane wave * BesselBeamGain: generate a Bessel Beam * NullGain: Gain with no output # Author Shun Suzuki, 2020