//===========================================================================
// 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:
 *
 */

#define S2550

#include "sislP.h"

#if defined(SISLNEEDPROTOTYPES)
void
s2550( SISLCurve *curve,
       double     ax[],
       int        num_ax,
       double     curvature[],
       int       *jstat )
#else
void s2550( curve, ax, num_ax, curvature, jstat )
     SISLCurve  *curve;
     double      ax[];
     int         num_ax;
     double      curvature[];
     int        *jstat;
#endif
/*
*********************************************************************
*
*********************************************************************
*
* PURPOSE    : Evaluate the curvature of a curve at given parameter values
*              ax[ 0 ],...,ax[ num_ax - 1 ].
*
*
*
* INPUT      : curve    - Pointer to the curve.
*              ax       - The parameter values
*          num_ax       - No. of parameter values
*
*
*
*
* OUTPUT     :
*              curvature - The "num_ax" curvature values computed
*              jstat  - Status messages
*                                         > 0      : Warning.
*                                         = 0      : Ok.
*                                         < 0      : Error.
*
*
* METHOD     : Call the SISL rutine s2551() num_ax times
*
* REFERENCES :
*
*
* CALLS      : s2551()
*
* WRITTEN BY  :   Geir Westgaard, SINTEF, Oslo, November 1999
* MODIFIED BY :
* REVISED BY  :
*
*********************************************************************
*/
{
  int i;                      /* Index variable                      */
  int kstat = 0;              /* local status variable               */
  int kpos = 0;               /* local error position                */
  int leftknot = 0;           /* Knot index                          */
  double *derive = SISL_NULL;      /* Derivatives                         */



  /* Allocate local arrays */

  derive = newarray( 3*curve->idim, DOUBLE );

  if ( derive == SISL_NULL )      goto err101;


  /* Evaluate the curvature in all ax[i] position */

  for ( i = 0; i < num_ax; i++ )
  {
    s2551( curve, ax[i], &leftknot, derive, curvature + i, &kstat );

    if ( kstat < 0 ) goto error;
  }




 /* Successful computations.  */

  *jstat = 0;
  goto out;

  /* Error in scratch allocation */
 err101:
  *jstat = -101;
  s6err( "s2550",*jstat,kpos);

  /* Error in lower level routine.  */

 error:  *jstat = kstat;
  s6err( "s2550", *jstat, kpos );
  goto out;


 out:
  /* Free local arrays */

 if ( derive != SISL_NULL ) freearray( derive );

 return;

}
