[FEATURE REQUEST] UNIVERSAL TWEEN

It would be great to have universal TWEEN function in expressions, perhaps with different options on easing in time.

output=tween(value1 to value 2, over amount of time in sec, type of easing)

Examples:

fake HDR:

walking from interior into exterior:

interior ->set brightness of interior TWEEN(100,60,2,0);

exterior ->set brightness of exterior TWEEN(180,100,2,0);

crossing the line between interior and exterior would result in dimming both - interior to very dark and exterior to normal in 2 seconds.

music:

switching between music themes with crossfade

More examples can be described (cameras, visibility of objects, objects moves etc.), but I think it's sufficient.

You can already achieve a lot with the lerp function.

There is the plugin LiteTween, but it's a behaviour, I don't know if you can use it to do all the things you say.

But I think it would be really hard to implement a function which receives a parameter for duration, given that the event sheets are executed every tick.

Yeah parameter for duration +100

+ Loads for me too. It is possible to code tweens with a bit of thought and research or you can use the Lite Tween plugin if you don't worry about future compatibility or access to the Scirra arcade. However, I think that having these built in would be great.

Lite Tween is fine, but it works with behaviors. I would like to see something more universal, which works almost with anything.

There are like 3 or 4 threads about that they want to have like official motion plug, but never got reply from Ashley.

Yann created a set of functions on this topic, I've reposted (hope thats ok) the links here as I have found them very useful :)

Topic:

http://www.scirra.com/forum/various-ease-in-ease-out-through-functions_topic66359.html

Yanns Demo

Yanns Capx

arontwose It is perfect and I understand the math behind it, still I'm not a programmer and I have difficulties in applying it to my needs...