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- /* bspline/gsl_bspline.h
- *
- * Copyright (C) 2006 Patrick Alken
- *
- * 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; either version 3 of the License, or (at
- * your option) any later version.
- *
- * 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, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- */
- #ifndef __GSL_BSPLINE_H__
- #define __GSL_BSPLINE_H__
- #include <stdlib.h>
- #include "gsl_math.h"
- #include "gsl_vector.h"
- #undef __BEGIN_DECLS
- #undef __END_DECLS
- #ifdef __cplusplus
- # define __BEGIN_DECLS extern "C" {
- # define __END_DECLS }
- #else
- # define __BEGIN_DECLS /* empty */
- # define __END_DECLS /* empty */
- #endif
- __BEGIN_DECLS
- typedef struct
- {
- size_t k; /* spline order */
- size_t km1; /* k - 1 (polynomial order) */
- size_t l; /* number of polynomial pieces on interval */
- size_t nbreak; /* number of breakpoints (l + 1) */
- size_t n; /* number of bspline basis functions (l + k - 1) */
- gsl_vector *knots; /* knots vector */
- gsl_vector *deltal; /* left delta */
- gsl_vector *deltar; /* right delta */
- gsl_vector *B; /* temporary spline results */
- } gsl_bspline_workspace;
- gsl_bspline_workspace *
- gsl_bspline_alloc(const size_t k, const size_t nbreak);
- void gsl_bspline_free(gsl_bspline_workspace *w);
- size_t gsl_bspline_ncoeffs (gsl_bspline_workspace * w);
- size_t gsl_bspline_order (gsl_bspline_workspace * w);
- size_t gsl_bspline_nbreak (gsl_bspline_workspace * w);
- double gsl_bspline_breakpoint (size_t i, gsl_bspline_workspace * w);
- int
- gsl_bspline_knots(const gsl_vector *breakpts, gsl_bspline_workspace *w);
- int gsl_bspline_knots_uniform(const double a, const double b,
- gsl_bspline_workspace *w);
- int
- gsl_bspline_eval(const double x, gsl_vector *B,
- gsl_bspline_workspace *w);
- __END_DECLS
- #endif /* __GSL_BSPLINE_H__ */
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