how to control multiple actors individually using vtk.js?

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1

Hello! All. I am using vtk.js and so far it has been great. I am able to render multiple actors in the render window. however, all my mouse interactions (zoom, pan, rotate) are applied to all the actors that are rendered. I am searching for a way to apply mouse interactions on each actor individually while the rest actors remain undisturbed. Could someone share their knowledge on how to achieve this using vtk.js? Thank you.

2

You have 2 options:

  • use a generic interactor style (or manipulator) to translate mouse events into a UserMatrix to apply to a given (selected in your GUI?) actor
  • use an interactive widget to translate/rotate actors in your scene (one widget per actor ?). Such translation/rotation widget does not exist yet. (rendering 3d elements on top)
3

Thank you for your prompt response. So far i have been using the vtkFullScreenRenderWindow and then getting my interactor using getInteractor() on my vtkFullScreenRenderWindow instance. Now according to your first suggestion, should I be using some other interactor other than the one that I stated above?

4

on your interactor, you can set an interactorStyle. You would have to write your own interactor style. You can look at how the default InteractorStyleTrackballCamera is coded to write your own.

5

Sure. I will work on this and get back with the result. Thank you.