Method BuildPoints

Common/DataModel/vtkImageData.cxx:150–187

------------------------------------------------------------------------------

//------------------------------------------------------------------------------
void vtkImageData::BuildPoints()
{
  vtkNew<vtkDoubleArray> xCoords;
  vtkNew<vtkDoubleArray> yCoords;
  vtkNew<vtkDoubleArray> zCoords;
  vtkDoubleArray* axisCoords[3] = { xCoords.Get(), yCoords.Get(), zCoords.Get() };

  int dims[3];
  this->GetDimensions(dims);

  int extent[6];
  this->GetExtent(extent);

  int loc[3];
  int ijk[3];
  double point[3];
  for (int i = 0; i < 3; ++i)
  {
    if (this->DirectionMatrixIsIdentity)
    {
      axisCoords[i]->SetNumberOfValues(dims[i]);
      for (loc[i] = 0, ijk[i] = extent[2 * i]; loc[i] < dims[i]; ++loc[i], ++ijk[i])
      {
        point[i] = this->Origin[i] + this->Spacing[i] * ijk[i];
        axisCoords[i]->SetValue(loc[i], point[i]);
      }
    }
    else
    {
      // axis coords will be used to extract spacing and origin, so we use loc instead of ijk
      axisCoords[i]->SetNumberOfValues(2);
      axisCoords[i]->SetValue(0, this->Origin[i]);
      axisCoords[i]->SetValue(1, this->Origin[i] + this->Spacing[i]);
    }
  }
  this->SetStructuredPoints(vtkStructuredData::GetPoints(
    xCoords, yCoords, zCoords, extent, this->DirectionMatrix->GetData()));
}

//------------------------------------------------------------------------------
void vtkImageData::GetCell(vtkIdType cellId, vtkGenericCell* cell)