Default Mix Duration != 0?

Alexus

Hello. 🙂

I have a simple questions about mixing time between different animations.

1) If I set "Default Mix Duration" to zero, would it be really zero? Can it can be 0.001f?
2) If yes, what parameters control this value in this case?

Thank you so much for your help and great work!

Alexus

Pharan

The mix duration value is the time it takes in seconds, for one animation to transition to the next.
The "Default Mix Duration" field on the SkeletonData Asset gets loaded as the default duration that animation transitions have when you play a new animation after another one.
You can also set custom mix duration values per pair of animations on the SkeletonData Asset. This takes priority over the default mix duration.

You can also set the mix duration within the code you use to set the animations. For example:

Spine.TrackEntry trackEntry = skeletonAnimation.AnimationState.SetAnimation(0, "run", true);
trackEntry.MixDuration = 0.5f; // Make this transition last 0.5 seconds, instead of the default mix duration value.

When the mix duration is 0, no visible transition/fade out happens. The new animation immediately starts playing without blending when you set it.

Alexus

Thank you for quick reply!
I'm not sure if I do everything right. I lean Spine Skeleton(my character), turn it on 180 degrees(mirror) and then change animation on the new one.
The "Default Mix Duration" field on the SkeletonData Asset is set to zero. But I can see, how it first mirror on 180 degrees and then change animation. It's happen fast, but I can see how my character was in old "lean" animation. Maybe 1-2 frames. I checked twice delay between changing rotation(mirror on 180 degrees) and setting new animation.
What do I do wrong?
Thank you so much for your help in my problem. 🙂

Pharan

This probably has nothing to do with mixing, and more to do with Unity script execution order.
See this section here : https://github.com/pharan/spine-unity-docs/blob/master/Handling-the-Skeleton.md#lifecycle

If your script runs AFTER SkeletonAnimation, the animation pose won't be visible/applied until the next frame.
You can either force your script to run BEFORE SkeletonAnimation (see: https://docs.unity3d.com/Manual/class-MonoManager.html).
Or if your script runs after SkeletonAnimation, make sure to make the calls below.

var skeletonAnimation = GetComponent<SkeletonAnimation>();
// change rotation
// set animation
skeletonAnimation.AnimationState.Update(0);
skeletonAnimation.AnimationState.Apply(skeletonAnimation.Skeleton);

But either way, I would recommend you specify the execution order (https://docs.unity3d.com/Manual/class-MonoManager.html) to make sure you know which script runs first all the time. Unity can order it in unexpected ways at unexpected times otherwise.

maasha

For anyone viewing this from the future and wants to change the mix for a particular animation only, this really helped me.
Hope it helps you too :heart:

Harald

Very glad it helped! It's even nicer on the spine-unity documentation page where you can see the animated GIF 😉
spine-unity Runtime Documentation: Mix Settings

It's always a good idea to search the documentation page first when having any questions.