[vtkusers] object of vtk in TCL

[Chen Fu]

Hi!

I find the objects created by the vtk are not a
variable.
for example:

% vtkRenderer ren
ren
% info vars
tcl_rcFileName tkPriv.:0 tcl_version argv argv0
tcl_interactive
errormsg VTK_DATA_ROOT tcl_traceCompile tk_library
auto_oldpath
tk_version errorCode auto_path tk_strictMotif
errorInfo tkPriv
auto_index env tcl_patchLevel argc tk_patchLevel
tcl_traceExec
tcl_libPath errorMessage tcl_library tcl_platform
%

the "ren" isn't inside the "info vars"
How can i get a description of object? 

I try:
% puts $ren
can't read "ren": no such variable

I am a newbie in tcl. Hope somebody can lend me a hand
:)

Another probleam is how to delete such a object?
Sometimes, my
script want to replace the former object to another
type.

for example:
% vtkImageViewer ren
ren: a vtk object with that name already exists.

It seems can't  be replaced by declare a new object
with same name. So there must be a way to delete it,
isn't it?

Thank you!!


=====
Remote Scensing Satellite Ground Station
Chinese Academy of Science

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