Tweens of anything else but position/rotation...

LuxxorOne

For example: How can I do tweening of colors or other parameters?

I tried to read up on "bound callable references" but still don't really understand them in this context.

I get it when I write something like this:

fun addTwo(x: Int) = x + 2
var list = listOf(1, 2, 3, 4).map(::addTwo) // # => [3, 4, 5, 6]
println(list)

But I don't understand this:

You have to use bound callable references to define properties that will change"

Can someone give an example in KorGE context how to tween a non-trivial/arbitrary parameter please (like color?
I also don't get how to get bytes data from RGBA color in general btw. )

Thanks.

soywiz

The same way as the other properties. Colors and angles are specially handled here: https://github.com/korlibs/korge/blob/16aac42d6cf0e4eed19e088e12b73282661cf0f4/korge/src/commonMain/kotlin/com/soywiz/korge/tween/tween.kt#L242-L248

The way for doing that is:

view.tween(view::colorMul[Colors.RED, Colors.BLUE])
view.tween(view::rotation[180.degrees])

Also note that in addition to views you can interpolate any other property just using the [...] syntax.
The view from view.tween is the view that will register an updater, and as long as that view is on the stage, it will interpolate the properties on each frame.

LuxxorOne

I just found that out by myself, lol.
This is so easy, I was looking to get the bytes r/g/b separate...
Very cool!