#ifndef GRID_H
#define GRID_H
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <render.h>
#include <cdt.h>
typedef struct _grid Grid;
typedef struct _node_list {
Agnode_t* node;
struct _node_list* next;
} node_list;
typedef struct {
int i, j;
} gridpt;
typedef struct {
gridpt p;
node_list* nodes;
Dtlink_t link;
} cell;
extern Grid* mkGrid (int);
extern void adjustGrid (Grid* g, int nnodes);
extern void clearGrid (Grid*);
extern void addGrid (Grid*, int, int, Agnode_t*);
extern void walkGrid (Grid*, int(*)(Dt_t*,cell*,Grid*));
extern cell* findGrid (Grid*, int, int);
extern void delGrid (Grid*);
extern int gLength (cell* p);
#endif