[vtk-developers] Big in vtkTreeReader - doesn't get Points correctly

[David Doria]

When reading a tree from a file, the Points coordinates are lost.

After tracing through vtkTreeReader.cxx, the reader gets the points
correctly initially. It then adds edges to a "builder":

builder->AddEdge(parent, child);

then when it copies the builder to the output:

output->GetPoints is correct here...

//copy the builder to the output
 if (!output->CheckedShallowCopy(builder))

'output' no longer has the correct point coordinates (they are all zero).

Here is an example that creates a tree, writes it (correctly), then
fails to have the points when it reads it back in.

http://www.rpi.edu/~doriad/VTK_List/Problems/TreeReader/

Can someone who is familiar with this reader please take a look?

Thanks,

David