******	subroutine eppos2cn(ncx, aTrack, nc)

        ncx = 0: aTrack.pos is wolrd.
        ncx !=0: aTrack.pos is local for ncx


******	subroutine epsInside(pos, nci, nco)

	pos:   world
        nci:   comp which includes pos.  must be Matreska
        nco:   Matreska comp. number includes pos. or 0 no child Mat
               which includes pos.


******	subroutine epsOne(ncx, pos, icon)

	pos:  local to ncx

******	subroutine  epsPCont(ncx, pos, icon)

	pos:  local to ncx

******  subroutine epsMatreska(ncx, pos,  nc)

	pos: local to ncx

******  subroutine epsall(ncx, pos, nc)

        ncx = 0:  pos world
           != 0:  pos is local to  ncx

