[vtkusers] Serious bug, that freezes the system.

[Bill Lorensen]

Jorrit,
vtk does not handle the same mapper (with display lists...the default) referenced in 2 render windows.
Try applying the ImmediateModeRenderingOn method to the mapper.

The known problem that you found should be repaired. 

Bill

At 11:29 AM 1/12/01 +0100, Jorrit Schaap wrote:
>Hi,
>
>I've finally been able to write a small and simple demo programm to
>demonstrate a very serious bug somewhere in the picker. The programm can be
>found in the attachement of this mail. I've had this bug for a long time now
>in my own programm, but was never able to reproduce it in a small and simple
>programm. So, here it is, I suspect that the bug is somewhere in the
>picker...
>
>Here's a description of what happens. When you run the programm, two
>renderwindows appear, both showing the same cone. This cone is created by
>the same source, mapper and actor, and then attached to both windows. You
>can now rotate and pan and zoom in both windows... everything is fine and
>working as it should be. Now, press 'o' on your keyboard (to set the
>interactorstyle to object/actor mode), and try to click on the cone and
>rotate or move it. Depending on your hardware configuration, your system
>should either totaly freeze, or at least the behaviour of the interaction
>should go funny and eventually the programm will crash. Try also to place
>another window (explorer or so) underneath the renderwindow. On some
>platforms you will see the lower window 'through' the renderwindows.
>
>I have tested this on multiple systems, running WinNT and Win2000, with
>different video cards. Only with a GeForce the system totally freezes. With
>other types of video cards the programm behaved funny, and then crashed. We
>are currently using the nightly version from 27/10/2000, but we have had
>this problem for over at least a year, using many different versions of vtk.
>
>Just a last note: If you're going to try to find this bug, please save all
>the stuff you're working on and close all aplications... ;-)
>
>Best regards, Jorrit.
>
>--
>Jorrit Schaap
>Division of Image Processing
>Leiden University Medical Center
>+31 71 5266206