121 lines
4.9 KiB
C
121 lines
4.9 KiB
C
/* interpolation/gsl_spline2d.h
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*
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* Copyright 2012 David Zaslavsky
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or (at
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* your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#ifndef __GSL_SPLINE2D_H__
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#define __GSL_SPLINE2D_H__
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#include <gsl/gsl_interp.h>
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#include <gsl/gsl_interp2d.h>
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#undef __BEGIN_DECLS
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#undef __END_DECLS
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#ifdef __cplusplus
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# define __BEGIN_DECLS extern "C" {
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# define __END_DECLS }
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#else
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# define __BEGIN_DECLS /* empty */
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# define __END_DECLS /* empty */
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#endif
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__BEGIN_DECLS
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/*
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* A 2D interpolation object which stores the arrays defining the function.
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* In all other respects, this is just like a gsl_interp2d object.
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*/
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typedef struct
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{
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gsl_interp2d interp_object; /* low-level interpolation object */
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double * xarr; /* x data array */
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double * yarr; /* y data array */
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double * zarr; /* z data array */
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} gsl_spline2d;
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gsl_spline2d * gsl_spline2d_alloc(const gsl_interp2d_type * T, size_t xsize, size_t ysize);
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int gsl_spline2d_init(gsl_spline2d * interp, const double xa[],
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const double ya[], const double za[],
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size_t xsize, size_t ysize);
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void gsl_spline2d_free(gsl_spline2d * interp);
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double gsl_spline2d_eval(const gsl_spline2d * interp, const double x,
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const double y, gsl_interp_accel* xa, gsl_interp_accel* ya);
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int gsl_spline2d_eval_e(const gsl_spline2d * interp, const double x,
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const double y, gsl_interp_accel* xa, gsl_interp_accel* ya,
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double * z);
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double gsl_spline2d_eval_extrap(const gsl_spline2d * interp, const double x,
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const double y, gsl_interp_accel* xa, gsl_interp_accel* ya);
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int gsl_spline2d_eval_extrap_e(const gsl_spline2d * interp, const double x,
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const double y, gsl_interp_accel* xa, gsl_interp_accel* ya,
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double * z);
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double gsl_spline2d_eval_deriv_x(const gsl_spline2d * interp, const double x,
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const double y, gsl_interp_accel* xa, gsl_interp_accel* ya);
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int gsl_spline2d_eval_deriv_x_e(const gsl_spline2d * interp, const double x,
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const double y, gsl_interp_accel* xa,
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gsl_interp_accel* ya, double * z);
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double gsl_spline2d_eval_deriv_y(const gsl_spline2d * interp, const double x,
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const double y, gsl_interp_accel* xa,
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gsl_interp_accel* ya);
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int gsl_spline2d_eval_deriv_y_e(const gsl_spline2d * interp, const double x,
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const double y, gsl_interp_accel* xa,
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gsl_interp_accel* ya, double * z);
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double gsl_spline2d_eval_deriv_xx(const gsl_spline2d * interp, const double x,
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const double y, gsl_interp_accel* xa, gsl_interp_accel* ya);
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int gsl_spline2d_eval_deriv_xx_e(const gsl_spline2d * interp, const double x,
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const double y, gsl_interp_accel* xa,
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gsl_interp_accel* ya, double * z);
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double gsl_spline2d_eval_deriv_yy(const gsl_spline2d * interp, const double x,
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const double y, gsl_interp_accel* xa, gsl_interp_accel* ya);
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int gsl_spline2d_eval_deriv_yy_e(const gsl_spline2d * interp, const double x,
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const double y, gsl_interp_accel* xa,
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gsl_interp_accel* ya, double * z);
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double gsl_spline2d_eval_deriv_xy(const gsl_spline2d * interp, const double x,
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const double y, gsl_interp_accel* xa, gsl_interp_accel* ya);
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int gsl_spline2d_eval_deriv_xy_e(const gsl_spline2d * interp, const double x,
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const double y, gsl_interp_accel* xa,
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gsl_interp_accel* ya, double * z);
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size_t gsl_spline2d_min_size(const gsl_spline2d * interp);
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const char * gsl_spline2d_name(const gsl_spline2d * interp);
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int gsl_spline2d_set(const gsl_spline2d * interp, double zarr[],
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const size_t i, const size_t j, const double z);
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double gsl_spline2d_get(const gsl_spline2d * interp, const double zarr[],
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const size_t i, const size_t j);
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__END_DECLS
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#endif /* __GSL_SPLINE2D_H__ */
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