Junxiang Wang,
it looks like you are using a const multiphyProblem instance but its
member function interpolate is not const. Try
multiphyProblem<dim>::interpolate(TriaActiveIterator<dealii::DoFCellAccessor<dim,
dim, false>>& cell, double &beta) const
Best,
Daniel
On Wed, Dec 4, 2024 at 1:44 AM Junxiang Wang <wangjx0...@gmail.com> wrote:
>
> Dear DEAL.II Communities,
>
> I encountered the following compile error in the function
> interpolate(cell,beta) where I wanted to access cell data inside the function
> and failed to debug it after several methods....
> """
> error: passing ‘const multiphyProblem<3>’ as ‘this’ argument discards
> qualifiers [-fpermissive]
> 1018 | double g_o = interpolate(cell,beta);
> """
>
>
> The definition of cell is:
> ""
> 5 typename DoFHandler<dim>::active_cell_iterator cell = dof_handler
> 4
> .begin_active(),
> 3 endc =
> dof_handler.end();
> ""
> The definition of function interpolate() is:
> """
> 13 template <int dim>
> 12 double
> 11
> multiphyProblem<dim>::interpolate(TriaActiveIterator<dealii::DoFCellAccessor<dim,
> dim, false>>& cell, double &beta)
> 10 {
> 9 double g{0};
> 8
> 7 double x = cell->center()[0] - 0.5;
> 6 double y = cell->center()[1] - 0.5;
> 5
> 4 double r = std::sqrt(std::pow(x,2) + std::pow(y,2));
> 3 // definition of g
> 8
> 9 return g;
> 10
> 11 }
> """
>
>
> Do you know any issue may involved in the code? and can give me some hint.
>
> Thanks a lot.
>
> Best regard,
>
> Junxiang Wang
>
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