int type = 1;
int unit = 3;
int accuracy = 1;
int count = 1;
double acc_val[11] = {.01,0,0,0,0,0,0,0,0,0,0};
double density = 1.0;
double massprop[47];
double massprop_stat[13];
/* if sheet bodies were selected */
UF_CALL(UF_MODL_ask_mass_props_3d(&blk_obj,
count,
type,
unit,
density,
accuracy,
acc_val,
massprop,
massprop_stat));