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Face.h

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/* $\Id$ 
   Face.h in library gridlock
   Written by Samit Ahlawat <ahlawat2@uiuc.edu>
   Distributed under GPL (GNU Public License)
*/

#ifndef _FACE_H_
#define _FACE_H_

#include "common_headers.h"


/******************************************************
 * Representation of Face class                       *
 ******************************************************/

struct Face
{
        /********************************************
         *  |  Your face based variables here   |   *
         * \|/                                 \|/  *
         *  '                                   '   *
         ********************************************/
        
    /********************************************
         *  .                                   .   *
         * /|\ Your face based variables above /|\  *
         *  |                                   |   *
         ********************************************/
                
        struct Edge** face_edges;
        int edge_num;

#ifndef AREA_VOLUME_NORMAL_NOT_NEEDED
        float area;
        /***********************************************
         * Direction cosines of unit area normal. Correct
         * sign is specified by the cell having this face
         ***********************************************/
        float direction_cosines [3];
#endif  

#ifndef CELL_FACE_CENTROID_NOT_NEEDED
        float centroid_coordinates [3];
#endif
                
        int global_face_num;
        /*boundary_face = 1 if face is on boundary, 0 oherwise*/
        short boundary_face;
        
};

void static_face_ds_init (void);

void face_init (int fc_num, int ed_num, struct Face* fc);

#ifndef CELL_FACE_CENTROID_NOT_NEEDED

void compute_centroid (struct Face* fc);

#endif

#ifndef AREA_VOLUME_NORMAL_NOT_NEEDED
void compute_direction_cosines (struct Face* fc);

void compute_area (struct Face* fc);
#endif

void set_this_face (struct Face* fc);

void print_fc_debug_info (struct Face* fc);

void output_face (FILE* fp, struct Face* fc);

void face_destroy (struct Face* fc);

void static_face_ds_destroy (void);

#endif

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