[vtkusers] deepcopy and shallowcopy

[alethea]

First, DeepCopy will copy all layers of data, whereas ShallowCopy will copy
less data.

Here's a simple example of using DeepCopy in C++, where triangleFilter at
the end of some data pipeline.

vtkPolyData* UseDeepCopy(vtkTriangleFilter* triangleFilter)
{
  triangleFilter->Update(); // this needs to be called to actually build the
data structure returned in  GetOutput()

  vtkPolyData* polyData = vtkPolyData::New(); // You must create this
object, or it can't be used in DeepCopy

  polyData->DeepCopy(triangleFilter->GetOutput()); // Copy the triangulated
data over to polyData

  // Note, you could delete triangleFilter now, because the data's been
copied, though that should really be done outside of this function.

  return polyData;
}


david

david bahn wrote
> Hi All,
>          i have a question about the application of deepcopy and
> shallowcopy functions in polydata, how does these two functions works,
> anybody can give me an example to understand the applications of these two
> functions in an example?
> 
> 
> david





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