struct PK_TOPOL_fctab_vertex_param_s
       {
       int        *param;
       int        length;
       };
typedef struct PK_TOPOL_fctab_vertex_param_s
               PK_TOPOL_fctab_vertex_param_t;


This is a support structure for PK_TOPOL_facet_r_t. It represents a one column
table which maps vertex indices (topology) into a parameter index value. This
index can be used to reference the param_uv, param_dp and param_d2p tables.