  COMMAND PWAVE3D
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    Purpose: 3D-particle-wave (along x-,y- and z-axis)
      Usage: PWAVE3D(<particleID>,<frames>,<filename>,<"S" or "F">,<saveFormat>,
                     [<amplitude>,<wavelength>,<sourceX>,<sourceY>,<sourceZ>,
                     <damping>,<phase in degrees>])
   Examples: pwave3d(1,40,obj,s,particle,,14.0,32.0,10,-10,12,1.2,-30.0)
             pwave3d(1,60,hd1:objects,f,obj)
