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/**
* This is the file casson.h. It was initially written by Damien Heard
* as part of the program Orb (http://www.ms.unimelb.edu.au/~snap/orb.html).
*
* This header was introduced into Regina for the Orb / Casson import
* and export routines, which were contributed by Ryan Budney. It is
* for internal use by these routines only; any other code should call
* the public routines from orb.h.
*
* Many thanks to Damien Heard for giving permission for his code to
* be distributed under the terms of the GNU General Public License.
*/
#ifndef CASSON_H
#define CASSON_H
#include "regina-core.h"
#define LN(ch) (ch=='u') ? 0 : ((ch=='v') ? 1 : ((ch=='w') ? 2 : 3))
const int vertex_at_faces[4][4] =
{{9,2,3,1},
{3,9,0,2},
{1,3,9,0},
{2,0,1,9}};
typedef struct CassonFormat CassonFormat;
typedef struct EdgeInfo EdgeInfo;
typedef struct TetEdgeInfo TetEdgeInfo;
struct REGINA_LOCAL CassonFormat
{
int num_tet;
EdgeInfo *head;
};
struct REGINA_LOCAL EdgeInfo
{
int index,
singular_index;
double singular_order;
TetEdgeInfo *head;
EdgeInfo *prev,
*next;
};
struct REGINA_LOCAL TetEdgeInfo
{
int tet_index,f1,f2;
TetEdgeInfo *prev,
*next;
};
#endif
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