Method ReadColors

IO/MINC/vtkMNIObjectReader.cxx:455–513

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//------------------------------------------------------------------------------
int vtkMNIObjectReader::ReadColors(
  vtkProperty* property, vtkPolyData* data, vtkIdType numPoints, vtkIdType numCells)
{
  // Find out what kind of coloring is used
  vtkIdType colorType = 0;
  if (this->ParseIdValue(&colorType) == 0)
  {
    return 0;
  }

  // Set the number of colors
  vtkIdType numColors = 1;
  if (colorType == 1)
  {
    numColors = numCells;
  }
  else if (colorType == 2)
  {
    numColors = numPoints;
  }
  else if (colorType != 0)
  {
    vtkErrorMacro("Color number must be 0, 1 or 2 " << this->FileName << ":" << this->LineNumber);
    return 0;
  }

  // Read the colors
  vtkUnsignedCharArray* colors = vtkUnsignedCharArray::New();
  colors->SetName("Colors");
  colors->SetNumberOfComponents(4);
  int status = this->ParseValues(colors, 4 * numColors);

  if (status != 0)
  {
    if (colorType == 0)
    {
      data->GetCellData()->SetScalars(nullptr);
      data->GetPointData()->SetScalars(nullptr);
      property->SetColor(
        colors->GetValue(0) / 255.0, colors->GetValue(1) / 255.0, colors->GetValue(2) / 255.0);
    }
    else if (colorType == 1)
    {
      data->GetPointData()->SetScalars(nullptr);
      data->GetCellData()->SetScalars(colors);
      property->SetColor(1.0, 1.0, 1.0);
    }
    else if (colorType == 2)
    {
      data->GetCellData()->SetScalars(nullptr);
      data->GetPointData()->SetScalars(colors);
      property->SetColor(1.0, 1.0, 1.0);
    }
  }

  colors->Delete();

  return status;