[vtk-developers] Problem when creating vtkImageData by hand
prabhu_r at users.sf.net
Sun Jul 10 07:22:38 EDT 2005
Sorry for the barrage of emails this week. I just ran into a peculiar
problem with VTK from CVS. If I use the vtkImagePlaneWidget along
with image data read from a file, everything seems to work. However,
when I create a vtkImageData object by hand and use that as input, I
get wierd problems. Stranger still, this works fine with VTK-4.4.
I've attached a slightly modified version of
Examples/GUI/Python/ImagePlaneWidget.py that demonstrates this
When run without modifications everything runs fine. I recreate the
same image data like so:
img_data = v16.GetOutput()
# Now lets create this data without the reader.
my_img_data = vtk.vtkImageData()
I then use 'my_img_data' instead of img_data as the input to the image
plane widgets. The example breaks and I get black planes which can't
be moved. The outline disappears (or maybe reduces to a point).
Something seems very wrong. If I don't use the vtkImagePlaneWidgets
and only use the outline then it is visible and looks OK.
The same exact code works with VTK-4.4. I wonder if I am doing
something wrong or is there a bug somewhere?
Any clarifications would be appreciated.
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