Function changeFaces

src/dynamicMesh/boundaryMesh/boundaryMesh.C:1713–1829

void Foam::boundaryMesh::changeFaces
(
    const labelList& patchIDs,
    labelList& oldToNew
)
{
    if (patchIDs.size() != mesh().size())
    {
        FatalErrorInFunction
            << "List of patchIDs not equal to number of faces." << endl
            << "PatchIDs size:" << patchIDs.size()
            << " nFaces::" << mesh().size()
            << abort(FatalError);
    }

    // Count number of faces for each patch

    labelList nFaces(patches_.size(), 0);

    forAll(patchIDs, facei)
    {
        label patchID = patchIDs[facei];

        if (patchID < 0 || patchID >= patches_.size())
        {
            FatalErrorInFunction
                << "PatchID " << patchID << " out of range"
                << abort(FatalError);
        }
        nFaces[patchID]++;
    }


    // Determine position in faces_ for each patch

    labelList startFace(patches_.size());

    startFace[0] = 0;

    for (label patchi = 1; patchi < patches_.size(); patchi++)
    {
        startFace[patchi] = startFace[patchi-1] + nFaces[patchi-1];
    }

    // Update patch info
    PtrList<boundaryPatch> newPatches(patches_.size());

    forAll(patches_, patchi)
    {
        const boundaryPatch& bp = patches_[patchi];

        newPatches.set
        (
            patchi,
            new boundaryPatch
            (
                bp.name(),
                patchi,