Method PrepareForNewData

Common/DataModel/vtkImageData.cxx:133–147

------------------------------------------------------------------------------ Graphics filters reallocate every execute. Image filters try to reuse the scalars.

// Graphics filters reallocate every execute.  Image filters try to reuse
// the scalars.
void vtkImageData::PrepareForNewData()
{
  // free everything but the scalars
  vtkDataArray* scalars = this->GetPointData()->GetScalars();
  if (scalars)
  {
    scalars->Register(this);
  }
  this->Initialize();
  if (scalars)
  {
    this->GetPointData()->SetScalars(scalars);
    scalars->UnRegister(this);
  }
}

//------------------------------------------------------------------------------
void vtkImageData::BuildPoints()