/*
 * p2d_hsort.h - Hierarchical polygon sort
 *
 * Written 2012 by Werner Almesberger
 * Copyright 2012 Werner Almesberger
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 */


#ifndef P2D_HSORT_H
#define P2D_HSORT_H

#include "poly2d.h"


#define	p2d_to_hier(p)	((struct p2d_hier *) (p))


struct p2d_hier {
	struct p2d p;		/* "next" link for siblings */
	struct p2d_hier *holes;	/* children */
};


struct p2d_hier *p2d_hsort(const struct p2d *p);
void p2d_hier_free(struct p2d_hier *t);

#endif /* !P2D_HSORT_H */