typedef int PK_FACE_heal_t;
PK_FACE_heal_no_c don't heal wounds - leave rubber faces
PK_FACE_heal_cap_c find a surface in which all edges of a hole
lie and attach this to a face covering the
hole
PK_FACE_heal_grow_from_child_c faces around the hole are extended until
they cover the hole
PK_FACE_heal_grow_from_parent_c grow the faces the parent had around the
hole until they cover it
PK_FACE_heal_shrink_c if extending faces does not yield a
solution, then shrinking the faces is tried
PK_FACE_heal_yes_c attempt healing by any appropriate means
