[vtkusers] image viewing slowdown?

[rharder at uiuc.edu]

Ahhh... sorry, I am an idiot.... I was reconnecting the
renderer to the renderwindow everytime I set a new array.
This is bad i guess....

Ross
  

---- Original message ----
>Date: Wed, 20 Oct 2004 22:26:40 -0500
>From: <rharder at uiuc.edu>  
>Subject: [vtkusers] image viewing slowdown?  
>To: vtkusers at vtk.org
>
>Hi,
>I am wondering what the standard operating procedure is for
>sending a new array down a pipeline.  I've found, using vtk4.2
>python, and wxPython, that things run fine if a have a separate
>pipeline, up to the renderwindow, for each array.  i just remove
>one renderer and add another to see a different image.  If i have
>just one pipeline, and send a new array through vtkImageImport, things
>slow down (zoom, pan, rotate) after a few arrays have been cycled
>through.  They still show up fine, but like a said, things slow
>down.
>Any thoughts?
>Ross
>
>Here is what I have.
>pseudo code:
>ii=vtkImageImport()
>id=ii.GetOutput()
>
>lut=vtkLookupTable()
>lut.SetNumberOfTableValues(256)
>lut.Build
>
>in2c=vtkImageMapToColors()
>im2c.SetLookupTable( lut )
>im2c.SetInput( id )
>
>ia=vtkImageActor()
>ia.SetInput( in2c.GetOutput() )
>
>ren=vtkRenderer()
>ren.SetActor( ia )
>
>to send data i do 
>ii.CopyImportVoidPointer( pointer, size )
>
>That's actually another point, ii.SetImportVoidPointer(pointer)
>doesn't seem to work in python.   
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