[vtkusers] DeepCopy doesn't copy vectors?
Madhusudhanan Balasubramanian
madhu_lsu at yahoo.com
Fri Sep 3 16:16:40 EDT 2004
Try ShallowCopy(); it works for me.
Madhu.
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I have a function which returns a vtkDataSet*, but subsequent callswill make the pointer returned in earlier calls invalid, so I want tocopy the output of the function into my own vtkDataSet. I figuredDeepCopy would do what I want, but it doesn't seem to copy (at least)the vector data from the point data of the source dataset.To spell it out better:vtkDataSet* MyObj::func(){ this->Data = some_filter->GetOutput(); return this->Data; //Data is a vtkDataSet*}void MyObj::SomeOtherFunc(){ vtkDataSet *my_data = vtkDataSet::New(); my_data->DeepCopy(this->func()); /*** CRASH HERE ***/ my_data->GetPointData()->GetVectors(); /*** CRASH HERE ***/}Psuedo-ish code, of course. Running through gdb, it seems thatGetPointData() returns a valid pointer, but when I try to GetVectors()from the pointer returned by GetPointData(), i get a segmentationfault.So it looks to me as if the vector data isn't being copied. Is thisnormal behavior? How / what should I set to enable a complete copy ofthe vtkDataSet
and all of the data it holds?Thanks,-tom
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