[vtkusers] order of execution

[Benjamin King]

Hello Christos,


> the problem is that in my window i have an interactor, so I find it 
> logical that the window does not allow other computations to be executed 
> before it closes (if it closes however the application closes!)

Hmm. The interactor catches the events that happen in the vtkRenderWindow. 
If a particular event makes it necessary to update the image, then the 
interactor will call vtkRenderWindow->Render(). As soon as this method 
returns, the interface should be responsive again.


> is it possible to have more than one vtk window open per application? if 
> yes how this could be done? threads? do you know any examples
> as i did not find any in the vtk documentation

What language are you using? With Tcl/Tk, you should use vtkTkRenderWidget. 
Example:

vtkTkRenderWidget .widget1
vtkTkRenderWidget .widget2

This will create two widgets with embedded vtkRenderWindows. There are some 
helper routines to attach Tcl/Tk's event management to the VTK pipeline. To 
access the vtkRenderWindows, you have to do somoething like

set window [.widget1 GetRenderWindow]


Best regards,
  Benjamin


-- 
Benjamin King
Institut für Medizinische Informatik
Medizinische Hochschule Hannover
Tel.: +49  511  532-2663