todo:
- remove FTDT operator from all processingX and replace by abstract-base-operator?
- remove FDTD engine from ProcessCurrent
- remove or cleanup ProcessEField + ProcessHField
Signed-off-by: Thorsten Liebig <Thorsten.Liebig@gmx.de>
Processing now uses a timestep interval in which Process() will do it's work
and returns the next interval it doesn't need another Process() call
all Processing routines can be put into these array
and it will take care of calling Process() at the right time
Thorsten Liebig
Sebastian Held