InterpolateBilinear.h

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#ifndef UTILS_INTERPOLATE_BILINEAR_H
#define UTILS_INTERPOLATE_BILINEAR_H
 
#include <vector>
 
#include "core/clockwerkerrors.h"
 
namespace warptwin {
    class InterpolateBilinear
    {
    public:
        int setData(const std::vector<double> &xValues, const std::vector<double> &yValues, const std::vector<std::vector<double>> &zValues);

        int getMinX(double& minX) const;

        int getMaxX(double& maxX) const;

        int getMinY(double& minX) const;

        int getMaxY(double& maxX) const;

        int interpolate(double x, double y, double &zInterpolated);
 
    private:
        std::vector<double> _x_data; 
        std::vector<double> _y_data; 
        std::vector<std::vector<double>> _z_data; 

        unsigned int _x_idx, _y_idx;

        double _x1, _x2, _y1, _y2, _z11, _z12, _z21, _z22;

        unsigned int _findIntervalIndex(const std::vector<double> &vec, double value);
    };
}
 
#endif // UTILS_INTERPOLATE_BILINEAR_H