public and protected data should be used in structs -- not classes
  line no : 44  : b2geomvxdvolume * volfoam; // < the rohacell foam piece >
  line no : 62  : b2geomsvdladderrib * volrib; // < builds the geometry of the two
  line no : 64  : float_t frib1uposition; // < position of the first rib inside the
  line no : 66  : float_t frib2uposition; // < position of the second rib inside the
  line no : 86  : b2geomvxdvolume * volliquid; // < object building the geometry of the
