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% | Reference manual page: farin_c1_interpolation.tex
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% | 
% | August 2003  Julia Floetotto
% | Package:   Interpolation
% | 
% |
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\begin{ccRefFunction}{farin_c1_interpolation}

\ccDefinition
  
The function \ccRefName\ interpolates the function values and the
gradients that are provided by functors using the method described in  \cite{f-sodt-90}.

\ccInclude{CGAL/interpolation_functions.h}

\ccParameters \ccc{RandomAccessIterator::value_type} is a pair
associating a point to a (non-normalized) barycentric coordinate.  See
\ccc{sibson_c1_interpolation} for the other parameters.

\ccFunction{template < class RandomAccessIterator, class Functor,
  class GradFunctor, class Traits> typename Functor::result_type
  farin_c1_interpolation(RandomAccessIterator first,
  RandomAccessIterator beyond, const typename
  std::iterator_traits<RandomAccessIterator>::value_type::second_type&
  norm, Functor function_value, GradFunctor function_gradient, const
  Traits& traits);} {generates the interpolated function value
  computed by Farin's interpolant \cite{f-sodt-90}.  See also
  \ccc{sibson_c1_interpolation}.  \ccPrecond{\ccc{norm} $\neq 0$.
    \ccc{function_value(p).second == true} for all points \ccc{p} of
    the point/coordinate pairs in the range
    $\left[\right.$\ccc{first}, \ccc{beyond}$\left.\right)$.}
  \ccPrecond{The range $\left[\right.$ \ccc{first},
    \ccc{beyond}$\left.\right)$ contains either one or more than three
    elements.  }  }

\ccHeading{Requirements}

Same requirements as for \ccc{sibson_c1_interpolation} only the
iterator must provide random access and \ccc{Traits::FT} does not need
to provide the square root operation.

\ccSeeAlso
\ccRefIdfierPage{CGAL::Data_access<Map>}\\
\ccRefIdfierPage{CGAL::linear_interpolation} \\
\ccRefIdfierPage{CGAL::sibson_c1_interpolation} \\
\ccRefIdfierPage{CGAL::sibson_gradient_fitting} \\
\ccRefIdfierPage{CGAL::Interpolation_traits_2<K>} \\
\ccRefIdfierPage{CGAL::natural_neighbor_coordinates_2}\\
\ccRefIdfierPage{CGAL::regular_neighbor_coordinates_2} \\
\ccRefIdfierPage{CGAL::surface_neighbor_coordinates_3}\\
%\ccImplementation

\end{ccRefFunction}