| 1 | //
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| 2 | // C++ Interface: BufferedLinearInterpolator1D
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| 3 | //
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| 4 | // Description:
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| 5 | //
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| 6 | //
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| 7 | // Author: Takeshi Nakazato <takeshi.nakazato@nao.ac.jp>, (C) 2012
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| 8 | //
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| 9 | // Copyright: See COPYING file that comes with this distribution
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| 10 | //
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| 11 | //
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| 12 | #ifndef ASAP_BUFFERED_LINEAR_INTERPOLATOR_1D_H
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| 13 | #define ASAP_BUFFERED_LINEAR_INTERPOLATOR_1D_H
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| 14 |
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| 15 | #include "Interpolator1D.h"
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| 16 |
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| 17 | namespace asap {
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| 18 |
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| 19 | /**
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| 20 | * Linear interpolation with some buffers for acceleration.
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| 21 | * @author TakeshiNakazato
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| 22 | */
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| 23 | class BufferedLinearInterpolator1D : public Interpolator1D {
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| 24 | public:
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| 25 | // Default constructor.
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| 26 | BufferedLinearInterpolator1D();
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| 27 |
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| 28 | // Destructor.
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| 29 | virtual ~BufferedLinearInterpolator1D();
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| 30 |
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| 31 | // Set horizontal (x) and vertical (y) data.
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| 32 | // @param[in] x pointer to horizontal data.
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| 33 | // @param[in] y pointer to vertical data.
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| 34 | // @param[in] n number of data.
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| 35 | // @see Interpolator1D::setData()
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| 36 | void setData(double *x, float *y, unsigned int n);
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| 37 |
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| 38 | // Set horizontal data (x).
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| 39 | // @param[in] x pointer to horizontal data.
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| 40 | // @param[in] n number of data.
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| 41 | // @see Interpolator1D::setX()
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| 42 | void setX(double *x, unsigned int n);
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| 43 |
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| 44 | // Perform interpolation.
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| 45 | // @param[in] x horizontal location where the value is evaluated
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| 46 | // by interpolation.
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| 47 | // @return interpolated value at x.
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| 48 | // @see Interpolator1D::interpolate()
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| 49 | float interpolate(double x);
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| 50 |
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| 51 | private:
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| 52 | // Numerical factor for linear interpolation.
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| 53 | double factor_;
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| 54 |
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| 55 | // Previous location.
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| 56 | double xold_;
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| 57 |
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| 58 | // Previous location as an index
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| 59 | unsigned int prev_;
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| 60 |
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| 61 | // Boolean parameter whether buffered values are effective or not.
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| 62 | bool reusable_;
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| 63 | };
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| 64 |
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| 65 | }
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| 66 | #endif
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