- Real relative_coordinate (Dimension_cache *d) const;
- Dimension_cache*common_group (Dimension_cache const* s) const;
- Dimension_cache*common_group (Link_array<Dimension_cache> caches) const;
- void set_empty (bool);
- void translate (Real);
- void set_offset (Real);
- bool valid_b () const { return valid_b_; }
- bool empty_b() const { return empty_b_; }
- void set_dim (Interval);
- Interval get_dim () const;