| 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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