Method WriteEdgeData

IO/Legacy/vtkDataWriter.cxx:713–856

------------------------------------------------------------------------------ Write the edge data (e.g., scalars, vectors, ...) of a vtk graph. Returns 0 if error.

// Write the edge data (e.g., scalars, vectors, ...) of a vtk graph.
// Returns 0 if error.
int vtkDataWriter::WriteEdgeData(ostream* fp, vtkGraph* g)
{
  vtkIdType numEdges;
  vtkDataArray* scalars;
  vtkDataArray* vectors;
  vtkDataArray* normals;
  vtkDataArray* tcoords;
  vtkDataArray* tensors;
  vtkDataArray* globalIds;
  vtkAbstractArray* pedigreeIds;
  vtkFieldData* field;
  vtkDataSetAttributes* cd = g->GetEdgeData();

  vtkDebugMacro(<< "Writing edge data...");

  numEdges = g->GetNumberOfEdges();
  if (numEdges <= 0)
  {
    vtkDebugMacro(<< "No edge data to write!");
    return 1;
  }

  scalars = cd->GetScalars();
  if (scalars && scalars->GetNumberOfTuples() <= 0)
    scalars = nullptr;

  vectors = cd->GetVectors();
  if (vectors && vectors->GetNumberOfTuples() <= 0)
    vectors = nullptr;

  normals = cd->GetNormals();
  if (normals && normals->GetNumberOfTuples() <= 0)
    normals = nullptr;

  tcoords = cd->GetTCoords();
  if (tcoords && tcoords->GetNumberOfTuples() <= 0)
    tcoords = nullptr;

  tensors = cd->GetTensors();
  if (tensors && tensors->GetNumberOfTuples() <= 0)
    tensors = nullptr;

  globalIds = cd->GetGlobalIds();
  if (globalIds && globalIds->GetNumberOfTuples() <= 0)
    globalIds = nullptr;

  pedigreeIds = cd->GetPedigreeIds();
  if (pedigreeIds && pedigreeIds->GetNumberOfTuples() <= 0)
    pedigreeIds = nullptr;

  field = cd;
  if (field && field->GetNumberOfTuples() <= 0)
    field = nullptr;

  if (!(scalars || vectors || normals || tcoords || tensors || globalIds || pedigreeIds || field))
  {
    vtkDebugMacro(<< "No edge data to write!");
    return 1;