[vtkusers] VTK in a MultiTouch Environment

[Christopher Denter]

Hello!

Sorry this thread has been silent for a few days. I'm back working on  
the issues.

So here is my roadmap for now:
	1. Work with the hack that I already have on a linux box. (Using it  
on MacOSX seems to be impossible, see below.)
	    This will be encapsulated in its own class so I can swap the VTK  
rendering related parts
	    easily afterwards without affecting the rest of the application.
	2. Write my program around that abstracted 'VTKWidget' (pymt  
terminology).
	3. Hope that either of the following happens:
		a) The hack is sufficient for what I need to do with it
		b) PyMT switches to PyOpengl (that's being discussed at the moment.  
David said that this worked for him easily 10 years ago.)
	    And if both don't happen:
		c) Implement that OpenGL RenderWindow we talked about. (Without the  
initialization phase.)

For 1) I did the following: http://paste.pocoo.org/show/148216/
By some magic I didn't understand nor find documentation about, that  
then gets wrapped and is accessible from within python.
Is that what you meant, David?
The only thing that pyglet gives me as pygletwin._window is something  
like 'c_void_p(402346272)'; does that look like a valid pointer to a  
carbon window?
I extracted the number and passed it to SetRootWindowInfo. After  
setting the size accordingly, the rendering then shows up in the  
pyglet window. However,
it is not possible to extract it as a texture because VTK seems to use  
some 'overlay' approach on OSX. This seems to mean that the hack  
cannot work on OSX, correct?

Hence, 2) will only be possible on linux.

As for 3b) I hope that this happens soon, but I can't know. David, do  
you have any example around that illustrates how to use VTK with  
PyOpenGL?

3c) will be enormously difficult for me, as I lack the experience in  
both, working with VTK and such big C++-projects. What I'd do is copy- 
paste vtkOpenGLRenderWindow.{cxx|h} to vtkRawOpenGLRenderWindow{.cxx| 
h}, respectively, replace all vtkOpenGLRenderWindow occurrences with  
vtkRawOpenGLRenderWindow and strip away everything that looks like  
OpenGL initialization.
What would I then need to do in order to make it compile with the rest  
of the code? (And can I somehow only recompile that file and link it  
again so I don't have to wait 30 minutes after every change to the  
code before I can test it, due to the lengthy compilation process?)


Thanks.
	Christopher