| 1 | //
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| 2 | // C++ Interface: Interpolator1D
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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_INTERPOLATOR_1D_H
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| 13 | #define ASAP_INTERPOLATOR_1D_H
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| 14 |
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| 15 | #include "Locator.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 | * Base class for interpolation operation
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| 21 | * @author TakeshiNakazato
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| 22 | */
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| 23 | class Interpolator1D {
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| 24 | public:
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| 25 | // Default constructor.
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| 26 | Interpolator1D();
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| 27 |
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| 28 | // Destructor.
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| 29 | virtual ~Interpolator1D();
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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 | void setData(double *x, float *y, unsigned int n);
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| 36 |
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| 37 | // Set horizontal data (x).
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| 38 | // @param[in] x pointer to horizontal data.
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| 39 | // @param[in] n number of data.
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| 40 | void setX(double *x, unsigned int n);
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| 41 |
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| 42 | // Set vertical data (y).
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| 43 | // @param[in] y pointer to vertical data.
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| 44 | // @param[in] n number of data.
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| 45 | void setY(float *y, unsigned int n);
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| 46 |
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| 47 | // Reset object.
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| 48 | void reset();
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| 49 |
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| 50 | // Set order for polynomial interpolation.
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| 51 | // @param order order of the polynomial.
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| 52 | //
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| 53 | // This method is effective only for polynomial interpolation.
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| 54 | void setOrder(unsigned int order) {order_ = order;}
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| 55 |
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| 56 | // Perform interpolation.
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| 57 | // @param[in] x horizontal location where the value is evaluated
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| 58 | // by interpolation.
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| 59 | // @return interpolated value at x.
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| 60 | virtual float interpolate(double x) = 0;
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| 61 |
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| 62 | protected:
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| 63 | // Locate x.
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| 64 | // @param[in] x horizontal location.
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| 65 | // @return location as an index.
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| 66 | // @see Locator::locate()
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| 67 | unsigned int locate(double x);
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| 68 |
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| 69 | // Query function whether the object is ready to interpolate.
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| 70 | // @return true if object is ready else false.
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| 71 | bool isready();
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| 72 |
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| 73 | // Fuctory method to create appropriate Locator object.
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| 74 | void createLocator();
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| 75 |
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| 76 | // Order of the polynomial (only effective for polynomial interpolation).
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| 77 | unsigned int order_;
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| 78 |
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| 79 | // Number of data points.
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| 80 | unsigned int n_;
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| 81 |
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| 82 | // Horizontal data.
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| 83 | double *x_;
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| 84 |
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| 85 | // Vertical data.
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| 86 | float *y_;
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| 87 |
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| 88 | // Pointer to the Locator object.
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| 89 | Locator<double> *locator_;
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| 90 | };
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| 91 |
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| 92 | }
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| 93 | #endif
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