[vtkusers] Getting all x,y,z coordinates of a data set

[tony hakki]

Hello;
 I would like to get whole x,y,z coordinates of a stl dataset.  I think I will use vtkPoints and GetPoint. I have tried many times but i hanen't achieved. Please help me
 

int npts;
vtkSTLReader *read = vtkSTLReader::New();
read->SetFileName(filename);
read->Update();

vtkPolyData *Source=read->GetOutput();
npts = Source->GetNumberOfPoints();

here I don't know how to go on

Can any body help me please

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