Update to "scenes.rb" example (from the old API blog)

[DanRathbun]

@DanRathbun

Also added scene_label [if it exists in the DC dictionary].

Why? Because the “included in animation” flag is not yet exposed in the API.The only way to know is to test the label to see if it equals the name surrounded by parenthesis.

Hmmm. thinking,… Maybe I should write that test into the Ruby-side so the DC authors need not do it. And then just write a boolean attribute they can use, like: scene_animated ? Yes I think that is the better route. No sense in writing two near identical values into the DC dictionary. (Just wish there was a fast boolean query method already implemented in the Sketchup::Page class to ask if a page was “included in animation”.)

Done. Added scene_animated optional attribute.

• For now, uses the workaround I posted: Sketchup::Page # use_in_animation? …

Removed the writing of scene_label attribute (as unneeded.)