text: /*
   * Copyright (C) 2005-2017 Centre National d'Etudes Spatiales (CNES)
   *
   * This file is part of Orfeo Toolbox
   *
   *     https://www.orfeo-toolbox.org/
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *     http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  #ifndef otbTimeSeries_h
  #define otbTimeSeries_h
  
  #include "itkFixedArray.h"
  #include <cmath>
  
  namespace otb
  {
  template <unsigned int TDegree=2, class TCoefPrecision = double>
  class PolynomialTimeSeries
  {
  public:
  
    typedef TCoefPrecision CoefficientsPrecisionType;
    typedef itk::FixedArray< CoefficientsPrecisionType, TDegree+1 > CoefficientsType;
  
  
    /// Constructor
    PolynomialTimeSeries()
    {
    }
    /// Destructor
    virtual ~PolynomialTimeSeries() {}
  
    inline void SetCoefficients(CoefficientsType& coeffs)
    {
      for(unsigned int i=0; i<=TDegree; ++i)
        m_Coefficients[i] = coeffs[i];
    }
  
    inline TCoefPrecision GetCoefficient(unsigned int co) const
    {
      return m_Coefficients[co];
    }
  
    inline CoefficientsType GetCoefficients() const
    {
      return m_Coefficients;
    }
  
    inline CoefficientsPrecisionType GetValue( CoefficientsPrecisionType val) const
    {
      CoefficientsPrecisionType tmpVal = 0;
      for( unsigned int i=0; i<=TDegree; ++i)
        tmpVal += m_Coefficients[i]*std::pow(val, static_cast<CoefficientsPrecisionType>(i));
      return tmpVal;
    }
  
  private:
    CoefficientsType m_Coefficients;
  };
  }
  #endif
  