[dariodario32]

Hi,
I'm working on a modified version of pimpleDyMFoam, in which i can access the pointDisplacement field and assign value to a boundary patch according to data calculated inside the solver. (I'm using OF 4.1)

after declaring the IOobject and the pointPatchVectorField referred to the patch:

pointVectorField pointDisplacement_
(
IOobject
(
"pointDisplacement",
mesh.time().timeName(),
mesh,
IOobject::MUST_READ,
IOobject::AUTO_WRITE
),
pointMesh::New(mesh)
);

const pointPatchVectorField &pvf = pointDisplacement_.boundaryField()[patchI];

I would like to assign the value coming from displacements (a vectorField variable):

pvf = displacements;

when I compile the solver I have the following error:

error: passing ‘const pointPatchVectorField {aka const Foam:ointPatchField<Foam::Vector<double> >}’ as ‘this’ argument discards qualifiers [-fpermissive]

Does anybody know why?
Thanks

[dariodario32]

the solution is to use boundaryFieldRef instead of boundaryField to write into the boundary patch:

pointVectorField& PointDisplacement = const_cast<pointVectorField&>
(
mesh.objectRegistry::lookupObject<pointVectorField >
(
"pointDisplacement"
)
);

PointDisplacement.boundaryFieldRef()[patchI] == displacements;

[Lin Xiangfeng]

Originally Posted by dariodario32

the solution is to use boundaryFieldRef instead of boundaryField to write into the boundary patch:

i want to say thank you, your solution really do me a help~

[ankur_garg]

Can Anyone help me, Where I am going wrong to write the below equation, where qem is the volScalarField and dfm is the class object:
error: passing ‘const volScalarField {aka const Foam::GeometricField<double, Foam::fvPatchField, Foam::volMesh>}’ as ‘this’ argument discards qualifiers [-fpermissive]
scalarField& qem = dfm.qem().boundaryFieldRef()[patchi];