BasisFunction.h

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/* SPDX-License-Identifier: CC0-1.0 */
#ifndef BasisFunction_h
#define BasisFunction_h
 
#include <vector>
#include <string>
 
#include <QString>
 
namespace Isis {
  class BasisFunction {
    public:
      BasisFunction(const QString &name, int numVars, int numCoefs);
      virtual ~BasisFunction() {};
 
      void SetCoefficients(const std::vector<double> &coefs);
      double Evaluate(const std::vector<double> &vars);
      double Evaluate(const double &var);
      virtual void Expand(const std::vector<double> &vars);
 
      int Coefficients() const {
        return p_numCoefs;
      };
      int Variables() const {
        return p_numVars;
      };
      QString Name() const {
        return p_name;
      };
      double Term(int c) const {
        return p_terms[c];
      };
      double Coefficient(int i) const {
        return p_coefs[i];
      };
 
    protected:
      QString p_name;
      int p_numVars;
      int p_numCoefs;
      std::vector<double> p_coefs;
      std::vector<double> p_terms;
 
  };
};
 
#endif