CFD Online Discussion Forums - Accessing value at the corner of a mesh

Hi, I'm trying to get the value at the corner of a 2D mesh. I can easily get the values along the boundary by doing something like:

Code:

label topWall = 2DMesh.boundaryMesh().findPatchID("topWall");

fixedGradientFvPatchScalarField& bufferC = refCast<fixedGradientFvPatchScalarField>(C2D.boundaryField()[topWall]);

scalarField& valC  = bufferC;

        

forAll (valCsPositive, i)

{

cBoundary[i] =   C2D.boundaryField()[topWall][i];

}

But this doesn't include the values at the corners. How can I get these?

I've tried something like this which I found from http://www.cfd-online.com/Forums/ope...iven-cell.html:

Code:

vector probePoint(x,y,z); //these are the coordinates of the value I need

label probeCell = mesh.findCell(probePoint); // this is the nearest cell to the point that I need

const cell& c = mesh.cells()[probeCell]; // a cell is a list of faces 



forAll (c, i) 

{ 

// This gives you the patch ID for a face. If the face is internal, you get -1 

label patchID = mesh.boundaryMesh().whichPatch(c[i]); 



if (patchID > -1) 

{ 

label faceID = mesh.boundaryMesh()[patchID].whichFace(c[i]); 



Info << "values=" << field.boundaryField()[patchID][faceID] << endl;



} 

}

But this will only give me the values at the patches of the specified cell (not the corner) and moreover, it gives me a segmentation fault during runtime after spitting out the values at the patches.