[vtkusers] camera position 2

[Peter]

in the link below
http://public.kitware.com/cgi-bin/viewcvs.cgi/*checkout*/Examples/Annotation/Tcl/cubeAxes.tcl?root=VTK&content-type=text/plain


it contains something like below

vtkCamera camera
    camera SetClippingRange 1.60187 20.0842
    camera SetFocalPoint 0.21406 1.5 0
    camera SetPosition 8.3761 4.94858 4.12505
    camera SetViewUp 0.180325 0.549245 -0.815974

i wonder how can i precisely get my camera postion. and i wonder how
they can get the camera postion so accurate. i bet there must be some
method... so please enlighten me...


thanks

Yours
Pan