Hello,
I'm having trouble resolving the following complier error:
error: ‘const class dealii::DoFCellAccessor<dealii::DoFHandler<3, 3>,
false>’ has no member named ‘vertex_indices’; did you mean ‘vertex_index’?
I don't understand the difference between the following code and the double
for-loop of step13::PointValueEvaluation::operator()
for (const auto &cell : dof_handler.active_cell_iterators())
{
// Loop over all vertices in the current cell.
for (const auto vertex : cell->vertex_indices()){
// Do some computation with the solution at the vertex.
Indeed, the documentation does not list a member function
"vertex_indices()" for the active cell iterator class. However, then I do
not understand why the above line works in step-13. Does it have anything
to do with my solution vector being a BlockVector<double> rather than
Vector<double>? Perhaps (maybe even likely) I have some misunderstanding of
what -> is doing. Later in the code the following line compiles just fine
even though vertex() is ALSO not a documented member function of the active
cell iterator class:
Point<3> currentVertex = cell->vertex(vertex);
I clearly have some grave misunderstanding I haven't been able to sort out
on my own with the documentation and examples. Can someone help me figure
out what is going on here?
Quick note: I'm aware that evaluation at the vertices is risky in the case
of DG methods, but I am using Q2 FEs.
Regards,
Kyle
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