shells/fem/sedge.h

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/* -*- C -*- */
/*
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
 *
 *                                   Fehmi Cirak
 *                        California Institute of Technology
 *                           (C) 2003 All Rights Reserved
 *
 * <LicenseText>
 *
 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
*/
#ifndef SEDGE_H
#define SEDGE_H

#if defined(HAVE_CONFIG_H)
/* autoconf */
#include <config.h>
#elif defined(BLD_PROCEDURE)
/* build procedure */
#include <portinfo.h>
#endif


#ifdef __cplusplus
namespace shells {
#define DECLARE_EXTERN extern "C"
#else
#define DECLARE_EXTERN extern
#endif

    struct SVertexS;
    struct SElementS;

    typedef struct SEdgeS {
        struct SVertexS    *m_a;      /* first end vertex */
        struct SVertexS    *m_b;      /* second end vertex */
        
        struct SElementS   *m_t;      /* first incident face */
        struct SElementS   *m_t2;     /* second incident face */
        
        struct SVertexS    *m_a2;     /* first end vertex belonging to m_t2 */
        struct SVertexS    *m_b2;     /* second end vertex belonging to m_t2 */
    } SEdge;
    
    
    DECLARE_EXTERN SEdge *createSEdge (struct SVertexS *, struct SVertexS *, 
                                       struct SElementS *);
    DECLARE_EXTERN void deleteSEdge (SEdge *edge);

    static int checkIfSEdgeContainsSElement(SEdge *edge, 
                                            struct SElementS *element) 
        {
            if (edge->m_t==element) return 1;
            if (edge->m_t2==element) return 2;
            
            return 0;
        }


#ifdef __cplusplus
}
#endif
#undef DECLARE_EXTERN

#endif 

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