I finally found the cause of negative keyframes!

[Daxel]

Hi guys, I've been less active here lately so I don't know if this is already known but, as far as I knew, the cause of the long standing problem of negative keyframes causing slowdowns was unknown, right? and needed to be solved using synthsin75's life saver "delete negative keyframes" script.

Today I finally found the cause, at least one of them.

Open a project, activate the timeline's visibility of multiple layers. In this case it was a bone layer, and a vector layer that was child of a different bone layer. Now select the vector layer, but copy-paste some keyframes from the bone layer to a different frame of the same bone layer, like you normally would if you forget you have the vector layer selected, which is quite easy with Moho's current timelines panel UI to be honest. This will result in the keyframes not being copied, which I already knew and may be intended behaviour. However, it will also result in lots of negative keyframes created, which can be checked using synthsin75's script.

I hope that's the only cause and it may be, because some people never see that problem so it could be that they just don't use to work with multiple timelines.

And now that I'm talking about multiple timeline's, I think that workflow could be way smoother with just these two additions:

1. Some way to quickly "close" (basically disable their timeline's visibility) the timelines that have their visibility activated from the timelines panel, without having to look for the layer in the layers panel.

2. The layer's panel should automatically show the selected layer when we select it clicking in its timeline. This is how it works for other selection methods like alt-right clicking, and it's even more needed when selecting from the timelines panel.

Have a nice day y'all.

[hayasidist]

far canal!!! yep -- reproducible here. Brilliant detective work!

[synthsin75]

Wow, long-time mystery solved!
Great work, Daxel.

I never use timeline visibility, so it makes sense why I never saw negative keyframes myself.

+1 for your two suggestions for improvements.