Hello,
I'm trying to access the coordinates of the quadrature points.
I'm doing :
QGauss<dim> quadrature_formula(degree + 1);
FEValues<dim> fe_values(fe, quadrature_formula,
update_values | update_quadrature_points |
update_JxW_values | update_gradients);
const std::vector<Point<dim>> & q_list =
quadrature_formula.get_points();
in the loop of the quadrature points,
const Point<dim> & GaussPoint = q_list[q];
And when i'm trying to get the values of GaussPoint, with GaussPoint[0]
(in my case dim=2), i've got the error :
--------------------------------------------------------
An error occurred in line <2778> of file
</local/lib/dealii/9.5.2_with_petsc/include/deal.II/base/table.h> in
function
typename dealii::AlignedVector<T>::reference dealii::Table<2,
ElementType>::operator()(dealii::Table<2, ElementType>::size_type,
dealii::Table<2, ElementType>::size_type) [with T = double; typename
dealii::AlignedVector<T>::reference = double&; dealii::Table<2,
ElementType>::size_type = long unsigned int]
The violated condition was:
::dealii::deal_II_exceptions::internals::compare_less_than(i,
this->table_size[0])
Additional information:
Index 4 is not in the half-open range [0,4).
Stacktrace:
-----------
#0 ./step-22: dealii::Table<2, double>::operator()(unsigned long,
unsigned long)
#1 ./step-22: Step22::StokesProblem<2>::compute_residual()
#2 ./step-22: Step22::StokesProblem<2>::run()
#3 ./step-22: main
--------------------------------------------------------
I don't understand why !!
How can i access to those coordinates ?
Many thanks,
Yann
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