typedef int PK_reset_prec_t; This datatype indicates the success of an attempt to reset the precision of an edge to the session precision. One of the following values: PK_reset_prec_ok_c geometry successfully replaced and precision set to session precision PK_reset_prec_tangent_c geometry not replaced and precision unaltered because surfaces are approximately tangential at edge PK_reset_prec_missing_geom_c not enough geometry present on edge or adjacent faces to recompute edge geometry PK_reset_prec_failure_c recomputation of edge geometry failed.