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/* Gerris - The GNU Flow Solver
 * Copyright (C) 2001 National Institute of Water and Atmospheric Research
 *
 * 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.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	See the GNU
 * General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
 * 02111-1307, USA.  
 */

#ifndef __SOLID_H__
#define __SOLID_H__

#include <gts.h>

#include "domain.h"
#include "event.h"

#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */

enum {
  GFS_STATUS_UNDEFINED = 0,
  GFS_STATUS_SOLID     = 1,
  GFS_STATUS_FLUID     = 2
};

void         gfs_cell_fluid                              (FttCell * cell);
gboolean     gfs_solid_is_thin                           (FttCell * cell, 
							  GfsGenericSurface * s);
gboolean     gfs_set_2D_solid_fractions_from_surface     (FttCell * cell,
							  GfsGenericSurface * s);
guint        gfs_init_solid_fractions_leaves             (GfsDomain * domain,
							  GSList * i,
							  GfsVariable * status);
void         gfs_init_solid_fractions_from_children      (GfsDomain * domain,
							  gboolean destroy_solid,
							  FttCellCleanupFunc cleanup,
							  gpointer data,
							  GfsVariable * status);
guint        gfs_domain_init_solid_fractions             (GfsDomain * domain,
							  GSList * i,
							  gboolean destroy_solid,
							  FttCellCleanupFunc cleanup,
							  gpointer data,
							  GfsVariable * status);
void         gfs_cell_init_solid_fractions_from_children (FttCell * cell);
gboolean     gfs_cell_check_solid_fractions              (FttCell * root);
void         gfs_domain_init_fraction                    (GfsDomain * domain,
							  GfsGenericSurface * s,
							  GfsVariable * c);
void         gfs_cell_cm                                 (const FttCell * cell, 
							  FttVector * cm);
void         gfs_solid_normal                            (const FttCell * cell,
							  FttVector * n);
void         gfs_face_ca                                 (const FttCellFace * face, 
							  FttVector * ca);
void         gfs_solid_coarse_fine                       (FttCell * parent,
							  GfsDomain * domain);

/* GfsSolid: Header */

typedef struct _GfsSolid         GfsSolid;

struct _GfsSolid {
  /*< private >*/
  GfsEvent parent;

  /*< public >*/
  GfsGenericSurface * s;
};

#define GFS_SOLID(obj)            GTS_OBJECT_CAST (obj,\
					         GfsSolid,\
					         gfs_solid_class ())
#define GFS_IS_SOLID(obj)         (gts_object_is_from_class (obj,\
						 gfs_solid_class ()))

GfsEventClass * gfs_solid_class  (void);

#ifdef __cplusplus
}
#endif /* __cplusplus */

#endif /* __SOLID_H__ */