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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:
*
*/
#define S1541
#include "sislP.h"
#if defined(SISLNEEDPROTOTYPES)
void
s1541 ( SISLCurve *pc1,
int npol,
double ebder[],
int ileft[],
double eder[],
int *jstat )
#else
void
s1541 ( pc1, npol, ebder, ileft, eder, jstat )
SISLCurve* pc1;
int npol;
double ebder[];
int ileft[];
double eder[];
int *jstat;
#endif
/*
*********************************************************************
*
* PURPOSE: Given a (polynomial) spline curve pc1 and
* preevaluated basis functions (using s1540()) on an
* npol polyline, calculate the 3D positions on
* that polyline (eder).
*
* INPUT: pc1 - the spline curve
* npol - the number of polyline points
* ebder - array containing the basis values
* B(ax[0 ],i0-k+1),...,B(ax[0 ],i0)
* B(ax[1 ],i1-k+1),...,B(ax[1 ],i1)
* : :
* B(ax[m1-1],im1-1-k+1),...,B(ax[m1-1],im1-1)
*
* ileft - ileft[i] <= ti < ileft[i] + 1
* (exception for ti == in : ileft[ti] = n-1)
*
* OUTPUT: eder - contains the 3D polyline points
* jstat - Status messages
*
* = 0 : Ok.
* < 0 : Error.
*
*
* METHOD:
*
* WRITTEN BY: Geir Westgaard, SINTEF, Oslo, November 1999
* REVISED BY: Vibeke Skytt, SINTEF, Dec. 2006. Allow dimension different from 3
* and rational curves
*
*********************************************************************
*/
{
int m = 0, m1 = 0;
int my, my1;
int np, i, j;
int ik;
double bas;
double* ecoef = SISL_NULL;
int kdim = pc1->idim;
double scratch[4];
double *xyz = NULL;
int krat = (pc1->ikind == 2 || pc1->ikind == 4);
/* Check the input. */
//if ( pc1->idim != 3 ) goto err104;
if (krat)
kdim++;
if (kdim > 4)
{
if ((xyz = newarray(kdim, DOUBLE)) == SISL_NULL)
goto err101;
}
else xyz = scratch;
/* Set input to local variables. */
ik = pc1 -> ik;
ecoef = (krat) ? pc1->rcoef : pc1 -> ecoef;
for ( np = 0; np < npol; np++ )
{
my = ileft[ np ] - ik;
for (j=0; j<kdim; j++)
xyz[j] = 0.0;
for ( i = 0; i < ik; i++ )
{
my++;
my1 = kdim*my;
bas = ebder[ m1++ ];
for (j=0; j<kdim; j++)
xyz[j] += ecoef[my1+j]*bas;
}
if (krat)
{
for (j=0; j<pc1->idim; j++)
xyz[j] /= xyz[pc1->idim];
}
for (j=0; j<pc1->idim; j++)
eder[m++] = xyz[j];
}
/* Successful computations. */
*jstat = 0;
goto out;
/* Error in input, crv->idim != 3 */
//err104: *jstat = -104;
// s6err( "s1541", *jstat, 0 );
// goto out;
err101: *jstat = -101;
s6err( "s1541", *jstat, 0 );
goto out;
out:
if (xyz != SISL_NULL && xyz != scratch)
freearray(xyz);
return;
}
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