Fluid box

#define     FL_BOX_CLASS(klass)

#define     FL_BOX(obj)

#define     FL_IS_BOX(obj)

struct FlBoxClass;

struct FlBox {
  GtsGNode parent;

  FttCell * root;
  GtsObject * neighbor[FTT_NEIGHBORS];
  guint id;
  int pid;
};

FlBoxClass* fl_box_class                    (void);

FlBox*      fl_box_new                      (FlBoxClass *klass);

void        fl_box_set_pos                  (FlBox *box,
                                             FttVector *pos);

void        fl_box_set_relative_pos         (FlBox *box,
                                             FlBox *reference,
                                             FttDirection d);