General question regarding callback functions

[jkissi]

Hi!
I would like to implement a "click and drag" functionality to select points. I didn't see that option in the vtk docs or the vedo examples. Is there a specific listener event for that or do I have to combine some other events in some way?

Cheers!
j

[marcomusy]

Hi
you may need to create a callback with Interaction events:
vedo -r multiwindows2

You may also need the computeWorldPosition() function, check out:
vedo -r cutFreeHand

ps: note that by pressing a you toggle actor-mode interaction and you can drag and rotate objects in the scene directly.