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/*
* Copyright (C) 1998, 2000-2007, 2010, 2011, 2012, 2013 SINTEF ICT,
* Applied Mathematics, Norway.
*
* Contact information: E-mail: tor.dokken@sintef.no
* SINTEF ICT, Department of Applied Mathematics,
* P.O. Box 124 Blindern,
* 0314 Oslo, Norway.
*
* This file is part of SISL.
*
* SISL is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as
* published by the Free Software Foundation, either version 3 of the
* License, or (at your option) any later version.
*
* SISL 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 Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public
* License along with SISL. If not, see
* <http://www.gnu.org/licenses/>.
*
* In accordance with Section 7(b) of the GNU Affero General Public
* License, a covered work must retain the producer line in every data
* file that is created or manipulated using SISL.
*
* Other Usage
* You can be released from the requirements of the license by purchasing
* a commercial license. Buying such a license is mandatory as soon as you
* develop commercial activities involving the SISL library without
* disclosing the source code of your own applications.
*
* This file may be used in accordance with the terms contained in a
* written agreement between you and SINTEF ICT.
*/
#include "sisl-copyright.h"
/*
*
* $Id: s1334.c,v 1.2 2001-03-19 15:58:46 afr Exp $
*
*/
#define S1334
#include "sislP.h"
#if defined(SISLNEEDPROTOTYPES)
void
s1334(double epoint[],int inbpnt,int idim,double nptyp[],
int icnsta,int icnend,int iopen,int ik,double astpar,
double *cendpar,SISLCurve **rc,double **gpar,int *jnbpar,int *jstat)
#else
void s1334(epoint,inbpnt,idim,nptyp,icnsta,icnend,iopen,ik,astpar,
cendpar,rc,gpar,jnbpar,jstat)
double epoint[];
int inbpnt;
int idim;
double nptyp[];
int icnsta;
int icnend;
int iopen;
int ik;
double astpar;
double *cendpar;
SISLCurve **rc;
double **gpar;
int *jnbpar;
int *jstat;
#endif
/*
*************************************************************************
*
* Purpose: To calculate a B-spline curve interpolating a set of points.
* The points can be assigned a tangent (derivative).
* The curve can be closed or open. If end-conditions are
* conflicting, the condition closed curve rules out other
* end conditions.
*
* Input:
* Epoint - Array (length idim*inbpnt) containing the points/
* derivatives to be interpolated.
* Inbpnt - No. of points/derivatives in the epoint array.
* Idim - The dimension of the space in which the points lie.
* nptyp - Array (length inbpnt) containing type indicator for
* points/derivatives/second-derivatives:
* 1 - Ordinary point.
* 2 - Knuckle point. (Is treated as an ordinary point.)
* 3 - Derivative to next point.
* 4 - Derivative to prior point.
* ( 5 - Second derivative to next point. )
* ( 6 - Second derivative to prior point. )
* 13 - Start-point of tangent to next point.
* 14 - End-point of tangent to prior point.
* Icnsta - Additional condition at the start of the curve:
* 0 : No additional condition.
* 1 : Zero curvature at start.
* Icnend - Additional condition at the end of the curve:
* 0 : No additional condition.
* 1 : Zero curvature at end.
* Iopen - Flag telling if the curve should be open or closed:
* 0 : Closed curve.
* 1 : Open curve.
* Ik - The order of the B-spline curve to be produced.
* Astpar - Parameter-value to be used at the start of the curve.
*
* Output:
* cendpar - Parameter-value used at the end of the curve.
* Rc - Pointer to output-curve.
* Gpar - Pointer to the parameter-values of the points in
* the curve. Represented only once, although derivatives
* and second-derivatives will have the same parameter-
* value as the points.
* Jnbpar - No. of different parameter-values.
* Jstat - status variable:
* < 0 : Error.
* = 0 : Ok.
* > 0 : Warning.
*
* Method: First the parametrization of the curve and the type
* specification of points/derivatives are checked and/or
* corrected. Then the knots are calculated, and the
* interpolation is performed.
*
* Calls: s1906,s1901,s6err.
*
* Written by: A.M. Ytrehus Si Oslo, Norway Sep. 1988.
* The main routine, p19501, is written by: T. Dokken SI.
* Rewised by: Trond Vidar Stensby, SI, 1991-07
*****************************************************************
*/
{
int kpos = 0;
int kstat = 0;
int *ltype = SISL_NULL; /* The kind of interpolation conditions. */
int knpt; /* Number of acepted interpolation conditions. */
double *lcond = SISL_NULL; /* The number of acepted interpolation conditions. */
int *ityp = SISL_NULL;
int ki;
/* make compatible to old use of s1604 */
if (iopen==SISL_CRV_CLOSED) iopen = SISL_CRV_PERIODIC;
/* a new version with input-iopen == rc->cuopen
should be made, with a name different from any
other.
NOTE: There is an error in this function when iopen = 0
qc as input to s1713 (and s1750) then has wrong flag !!*/
ityp = newarray (inbpnt, INT);
if (ityp == SISL_NULL)
goto err101;
for (ki=0; ki < inbpnt; ki++) ityp[ki] = (int)nptyp[ki];
/* <- guen & ujk Wed Jul 1 17:06:46 MESZ 1992 */
*jstat = 0;
/* Transform interpolation conditions. */
/* -> guen & ujk Wed Jul 1 17:06:46 MESZ 1992 */
/* s1906 (epoint, nptyp, icnsta, icnend, inbpnt, idim, &lcond, */
/* <ype, &knpt, &kstat); */
s1906 (epoint, ityp, icnsta, icnend, inbpnt, idim, &lcond,
<ype, &knpt, &kstat);
/* <- guen & ujk Wed Jul 1 17:06:46 MESZ 1992 */
if (kstat < 0)
goto error;
/* Interpolate. */
s1901(s1909, s1902, lcond, ltype, knpt, astpar, ik, idim, iopen,
cendpar, rc, gpar, jnbpar, &kstat);
if (kstat < 0) goto error;
*jstat = 0;
goto out;
/* Error in lower level routine. */
error: *jstat = kstat;
s6err("s1334",*jstat,kpos);
goto out;
/* allocation error */
err101: *jstat = -101;
s6err("s1334",*jstat,kpos);
goto out;
out:
if (ltype != SISL_NULL)
freearray (ltype);
/* -> added, guen & ujk Wed Jul 1 18:48:27 MESZ 1992 */
if (ityp != SISL_NULL)
freearray (ityp);
/* <- added, guen & ujk Wed Jul 1 18:48:27 MESZ 1992 */
if (lcond != SISL_NULL)
freearray (lcond);
return;
}
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