Camera/Light FocalPoint/Position

[Bill Lorensen]

You need an eval on the SetPosition line:

eval light SetPosition [cam1 GetPosition]

It's a tcl'ism.

Bill

At 10:06 AM 5/29/00 -0500, Eduardo Kortright wrote:
>Hello,
>
>Sorry to bother everyone with what is probably a trivial question.
>The VTK User's Manual has the following innocent-looking example:
>
>vtkCamera cam1
>vtkLight light
>   light SetPosition [cam1 GetPosition]
>
>This tcl code will not work on a recent nightly release of VTK for
>Windows.
>
>The result is an error:  Object named: light, could not find requested
>method:  SetPosition or the method was called with incorrect arguments.
>
>The same happens if you try to set the FocalPoint for the light.  The
>same error occurs if you similarly try to set the camera's position and
>focal point as well.  No error occurs if you specify coordinates using
>constants as in
>
>   light SetPosition 0 0 3
>
>What am I missing?  Thanks for any pointers.
>
>--
>Eduardo Kortright   Department of Computer Science
>eduardo at cs.uno.edu   University of New Orleans
>Voice: (504) 280-6626   Lakefront Campus
>FAX:   (504) 280-7228   New Orleans, LA 70148


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