//===========================================================================
// Copyright (C) 1998, 2000-2007, 2010, 2011, 2012 SINTEF ICT, Applied
// Mathematics, Norway.
//
// This file is part of GoTools
//
// 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 version 2 of the License. 
//
// 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, see <http://www.gnu.org/licenses>
//
// Contact information: E-mail: tor.dokken@sintef.no                      
// SINTEF ICT, Department of Applied Mathematics,                         
// P.O. Box 124 Blindern,                                                 
// 0314 Oslo, Norway.                                                     
//
// Other licenses are also available for this software, notably licenses
// for:
// - Building commercial software.                                        
// - Building software whose source code you wish to keep private.        
//===========================================================================

#include "sisl-copyright.h"

/*
 *
 * $Id: sh6idcon.c,v 1.2 2001-03-19 15:59:08 afr Exp $
 *
 */


#define SH6IDCON

#include "sislP.h"

/*
* Forward declarations.
* ---------------------
*/

#if defined (SISLNEEDPROTOTYPES)
void
sh6idcon (SISLIntdat ** pintdat, SISLIntpt ** pintpt1, SISLIntpt ** pintpt2, int *jstat)
#else
void 
sh6idcon (pintdat, pintpt1, pintpt2, jstat)
     SISLIntdat **pintdat;
     SISLIntpt **pintpt1;
     SISLIntpt **pintpt2;
     int *jstat;
#endif
/*
*********************************************************************
*
*********************************************************************
*
* PURPOSE    : To connect two intersection points in pintdat into a list.
*              If pintdat is SISL_NULL a new pintdat is also made.
*              If  one of pintpt is close to an other intersection point
*              the object pintpt is pointing to is removed, and
*              pintpt is set to point to the already inserted point.
*              The direction of the connection is set to go 
*              from pintpt1 to pintpt2.
*
*
*
* INPUT      : pintpt1  - Pointer to a pointer to new intersection point.
*              pintpt2  - Pointer to a pointer to new intersection point.
*              pintdat  - Pointer to a pointer to intersection date.
*
*
* OUTPUT     : jstat  - status messages
*                               = 0      : Connection done.
*                               < 0      : error
*
*
* METHOD     :
*
*
* REFERENCES :
*
*-
* CALLS      : s6err      - Gives error message.
*              sh6connect - Do the connection on low level.
*              sh6idnpt   - Insert a new intpt structure.
*
* WRITTEN BY : Ulf J. Krystad 06.91
* REVISED BY:  Micael Floater July 91. Set direction of connection.
* REVISED BY:   Ulf J. Krystad 07.91  Removed direction of connection.
*********************************************************************
*/
{
  int kstat;			/* Local status variable.                     */

  /* First we have to be sure that pintdat contain the two points. */

  sh6idnpt (pintdat, pintpt1, 1, &kstat);
  if (kstat < 0)
    goto error;

  sh6idnpt (pintdat, pintpt2, 1, &kstat);
  if (kstat < 0)
    goto error;

    /* Connect */
  sh6connect (*pintpt1, *pintpt2, &kstat);
  if (kstat < 0)
    goto error;

    /* Set direction of connection. */
    /*  sh6setdir(*pintpt1, *pintpt2, &kstat);
    if (kstat < 0)
    goto error; */


  *jstat = 0;
  goto out;

  /* Error from lower function */
error:
  *jstat = kstat;
  s6err ("sh6idcon", *jstat, 0);
  out:
     ;
}
