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LSST Data Management Base Package
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gslinterpolator.h
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1#ifndef LSST_GAUSS2D_FIT_GSLINTERPOLATOR_H
2#define LSST_GAUSS2D_FIT_GSLINTERPOLATOR_H
3
4#ifdef LSST_GAUSS2D_FIT_HAS_GSL
5
6#include "gsl.h"
7#include "interpolation.h"
8
10
11#include <gsl/gsl_errno.h>
12#include <gsl/gsl_spline.h>
13
14namespace lsst::gauss2d::fit {
15
19class GSLInterpolator : public Object {
20public:
21 explicit GSLInterpolator(std::vector<double> x, std::vector<double> y,
22 InterpType interp_type = INTERPTYPE_DEFAULT);
23 ~GSLInterpolator();
24
25 const InterpType get_interp_type() const;
26 static constexpr InterpType INTERPTYPE_DEFAULT = InterpType::cspline;
27
29 double get_knot_x(size_t idx) const;
31 double get_knot_y(size_t idx) const;
32
34 double eval(double x) const;
36 double eval_deriv(double x) const;
38 size_t size() const;
39
40 std::string repr(bool name_keywords = false,
41 std::string_view namespace_separator = Object::CC_NAMESPACE_SEPARATOR) const override;
42 std::string str() const override;
43
44private:
45 gsl_interp_accel* _acc;
46 gsl_spline* _spline;
47
48 const InterpType _interp_type;
49 size_t _n_knots;
50 std::vector<double> _x;
51 std::vector<double> _y;
52};
53
54} // namespace lsst::gauss2d::fit
55
56#endif // LSST_GAUSS2D_FIT_HAS_GSL
57#endif // LSST_GAUSS2D_FIT_GSLINTERPOLATOR_H