.scene_transition_finished?

[tomasz]

I want to make sure that a transition has been finished between two scenes.
When a scene is selected Sketchup.active_model.active_view.camera returns immediately the selected scene camera, although current view still changes till it reaches the destination.

If scenes contain cameras then it can be tested using a view observers and comparing camera eye & direction or maybe even more parameters. What if cameras exactly same in both scenes, but have say a different shadow settings?

Have someone a good idea how to solve it, that it will work in all cases?

[TIG]

Can you get the rendering_options of the scene [page] you are transitioning to... and compare some aspect[s] of the active_view's rendering_options with the equivalent[s] of the scene's rendering_options - e.g. sun-direction or date-time ? and return 'true' only when these are found to be equal ?

[Dan Rathbun]

You need to use the FrameChangeObserver

Weirdly it must be attached to the class via a class method (see example).

1) The simple example is posted in the Google Sketchup API Blog:
http://sketchupapi.blogspot.com/2009/07/dynamic-components-that-react-to-scene.html

2) It is not formmatted correctly (if you cut and paste it from the webpage,) so Todd Burch reformatted it, and posted it here:
http://www.smustard.com/forum/viewtopic.php?f=9&t=25

IF you use it, RENAME the class "FrameChangeObserver" to something else, WITHIN your own toplevel namespace.
Ex:

module Tomasz # <<-- unique toplevel namespace
  module AnimTest
    class FrameSpy
      # modified callback methods
      # from the Google example
    end

    # your AnimTest code that uses
    # an instance of your FrameSpy class

    # other methods, etc.

  end # module
end # module

[tomasz]

@tig said:

Can you get the rendering_options of the scene [page] you are transitioning to... and compare some aspect[s] of the active_view's rendering_options with the equivalent[s] of the scene's rendering_options - e.g. sun-direction or date-time ? and return 'true' only when these are found to be equal ?

Right. Unfortunately it is what I would like to avoid.

@dan rathbun said:

You need to use the FrameChangeObserver

Weirdly it must be attached to the class via a class method (see example).

Thank you, this is exactly what I was looking for!
It is really weird. I have checked all observers, but didn't remember this method hidden in SketchUp::Pages!

[Dan Rathbun]

@unknownuser said:

Thank you, this is exactly what I was looking for!
It is really weird. I have checked all observers, but didn't remember this method hidden in SketchUp::Pages!

Yup.. it is overlooked because is does not have a protoclass defined, nor it's own page in the API reference.