[Open Beta] Procedural On-the-Fly Animation in UE4: iTween!

[JaredTherriault]

@;202551

So I downloaded iTween at your suggestion on the Progress bar, I’m a little confused on how to use it though, I did the C++ install, compiled ect, in Blueprints I see there is a ‘Float from/to simple’ so I thought i try that, the start end and time seems obvious, but what I dont get is the targets. I can point an object as the target, but how do I tell it what property its going to update? at first I thought maybe there is an event I can bind to, but I don’t see it.

Hey , glad to see you!

iTween does not update specific properties on targets, it sends an interface message to that object. So in your case you’d want to implement iTInterface on your widget blueprint and set that as the OnTweenTick target. Then back in your widget blueprint, implement “Event On Tween Data Tick.” This will be fired every time the tween updates. One of the sends on the interface is “Float Value.” This is the current value of the float between your start and end floats, modulated by the tween. You can plug that value into your “Set Progress Bar Value” node, fired off every time “Event On Tween Data Tick” is called.

I used to have a video up for this, but I took it down because it wasn’t really relevant anymore in the new version. I plan to make a more current video very soon, I’m just ironing out some bugs and usability improvements first. Let me know if anything doesn’t make sense, I’ll do my best to explain it in detail!