Bezier Editor - add "Apply Function on Selected Keys"

[puthre]

Added Apply Function on Selected Key(s) feature on right click menu so you can now scale, move keys, set keys to a constant value and more easily create effects (like Bounce, Overshoot, etc) using the powerful godot Expression class.
Functions can have parameters "time" and "value", "time" is the time of the key,
"value" is the current value of the key.

[ghost]

I'm not exactly sure what is valid input for this (function names?). As far as I can tell giving a value changes the value of the selected keyframe. Is there more to it?

[puthre]

I'm not exactly sure what is valid input for this (function names?). As far as I can tell giving a value changes the value of the selected keyframe. Is there more to it?

Yes, that spin control allows you to enter any math expression and it's more useful when you select multiple keys and apply a function like:

"value*2.5"
(for scaling)
or

"cos(time)*200.0/time+value"
Anything that https://docs.godotengine.org/en/3.1/classes/class_expression.html class supports
that is most of the math functions.

[aaronfranke]

@puthre Is this still desired? If so, it needs to be rebased on the latest master branch.

[puthre]

@puthre Is this still desired? If so, it needs to be rebased on the latest master branch.

Well, it doesn't seem to be very useful. I'll close it for now.