[vtkusers] a surprise questuion about show some clouds!

[David Doria]

On Fri, Jan 6, 2012 at 7:54 PM, seaer <wuweitianye at yahoo.com.cn> wrote:
>
>  hello all!
>  I used VTK(5.4 ) to show some points on QVTKWidget with QT(4.7.3), a
> surprise questuion happened!
>  there are two different input data:
>   // a.txt (x,y,z)
>  1.021 1.548 93.725
>  1.011 1.555 93.735
>  1.023 1.588 93.711
>  1.009 1.591 93.726
>  1.001 1.601 93.732
>
>  http://vtk.1045678.n5.nabble.com/file/n5126976/Screenshot.png
>
>  // b.txt (x,y,z)
>  607645.021 3623761.548 93.725
>  607645.011 3623761.555 93.735
>  607645.023 3623761.588 93.711
>  607645.009 3623761.591 93.726
>  607645.001 3623761.601 93.732
>   http://vtk.1045678.n5.nabble.com/file/n5126976/Screenshot-1.png
>
>  in my code, i has used renderer->ResetCamera();
>  input aa.txt , vtkPoints have 5 points. input bb.txt ,vtkPoints also have 5
> poins. but  when show  inputting bb.txt  data ,why  viewPort only a point
> .for me, I didn't understand some   VTK mechanisms about this.
>  how can i do good about this.
>  thanks!

You'll have to show us some code. I'd suggest doing this in a normal
vtkRenderWindow (not using QVTK) for the example you send us. Are you
using vtkSimplePointsReader to read the files?

http://www.vtk.org/Wiki/VTK/Examples/Cxx/IO/SimplePointsReader

David