subroutine kutl_convert_c_to_w(c, mass, w)
*
* begin_doc
*
*  Convert a C track to a W track at the point of closest approach to its
*  reference point.
*
*  Input Parameters:
*  c              double precision array
*                 Input track parameters
*
*  mass           double precision variable
*                 mass of particle
*
*  Output Parameters:
*  w              double precision array
*                 Output track parameters
*
*
*  Other routines:
*
*  Notes:
*
*  Author:   Paul Avery      Created:  Tue Sep 23 20:59:11 EDT 1997
*
*  Major revisions:
*
*
* end_doc