Dear Bruno, Daniel and all,
Thank you so much for all of your help.
I finally made out my code. But it still has something wrong with the
DataOut part, perhaps I made some mistakes with the DataPostprocessor when
using it for output postprocessing. Here is the code snippet, wherein the
"StressPostprocessor" is a DataPostprocessor class I created for outputting
stress, and the "displacement_solutions" is a vector I computed out in the
prior steps. And the bold lines are where compiler says there is sth wrong
with:
template <int dim, int fe_degree>
void PlaneStress<dim, fe_degree>::output_displacement_and_stress_solutions
(unsigned int current_time_step)
{
std::vector<DataComponentInterpretation::DataComponentInterpretation>
data_component_interpretation (dim, DataComponentInterpretation::
component_is_part_of_vector);
DataOut<dim> u_data;
std::string displacement_filename = "displacement_solution_"
+ Utilities::int_to_string(
current_time_step)
+ ".vtk";
u_data.attach_dof_handler (dof_handler);
*u_data.add_data_vector (displacement_solutions,*
std::string("displacement_solution_")
+ Utilities::int_to_string(current_time_step
),
DataOut<dim>::type_dof_data,
data_component_interpretation);
std::ofstream u_output_stream (displacement_filename.c_str());
u_data.write_vtk(u_output_stream);
u_output_stream.close();
DataOut<dim> stress_data;
std::string stress_filename = "stress_solution_"
+ Utilities::int_to_string(
current_time_step)
+ ".vtk";
stress_data.attach_dof_handler (dof_handler);
*StressPostprocessor<dim> stress_out;*
*stress_data.add_data_vector(displacement_solutions, stress_out);*
stress_data.build_patches ();
std::ofstream stess_output_stream (stress_filename.c_str());
stress_data.write_vtk (stess_output_stream);
stess_output_stream.close();
}
And the error message on this part of code is:
error: undefined reference to 'void
dealii::DataOut_DoFData<dealii::DoFHandler<2, 2>, 2,
2>::add_data_vector<std::vector<double, std::allocator<double> >
>(std::vector<double, std::allocator<double> > const&, std::string const&,
dealii::DataOut_DoFData<dealii::DoFHandler<2, 2>, 2, 2>::DataVectorType,
std::vector<dealii::DataComponentInterpretation::DataComponentInterpretation,
std::allocator<dealii::DataComponentInterpretation::DataComponentInterpretation>
> const&)'
error: undefined reference to
'PlaneStress::StressPostprocessor<2>::StressPostprocessor()'
error: undefined reference to 'void
dealii::DataOut_DoFData<dealii::DoFHandler<2, 2>, 2,
2>::add_data_vector<std::vector<double, std::allocator<double> >
>(std::vector<double, std::allocator<double> > const&,
dealii::DataPostprocessor<2> const&)'
collect2: error: ld returned 1 exit status
I can't get any hint from this error message. Someone please help. Thanks
so much!
Best regard,
David
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