Method ComputeCellLength

Filters/FlowPaths/vtkEvenlySpacedStreamlines2D.cxx:246–273

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//------------------------------------------------------------------------------
int vtkEvenlySpacedStreamlines2D::ComputeCellLength(double* cellLength)
{
  vtkAbstractInterpolatedVelocityField* func;
  int maxCellSize = 0;
  if (this->CheckInputs(func, &maxCellSize) != VTK_OK)
  {
    if (func)
    {
      func->Delete();
    }
    return 0;
  }
  vtkDataSet* input;
  auto cell = vtkSmartPointer<vtkGenericCell>::New();
  double velocity[3];
  // access the start position
  if (!func->FunctionValues(this->StartPosition, velocity))
  {
    func->Delete();
    return 0;
  }
  // Make sure we use the dataset found by the vtkAbstractInterpolatedVelocityField
  input = func->GetLastDataSet();
  input->GetCell(func->GetLastCellId(), cell);
  *cellLength = sqrt(cell->GetLength2());
  func->Delete();
  return 1;
}

//------------------------------------------------------------------------------
int vtkEvenlySpacedStreamlines2D::FillInputPortInformation(int port, vtkInformation* info)