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Ragdoll gets deformed when in negative scale

decoamorim

I posted this in another tread, but people mistaken the issue with the other tread issue.

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Some weird thing happend with the meshes when flipping the character and applying the ragdoll.

I also flipped using code:

transform.localRotation = Quaternion.Euler(0.0f, 180.0f, 0.0f);

But all three methods get this bug in a different way.

Someone have the same problem or flipped using a different method ?

Cranktrain

As I'm trying to fix ragdoll problems in my own project, I've come across just the same thing. If I use:

GetComponent<SkeletonAnimator>().skeleton.FlipX = false;

(or true)

Then the ragdoll does what it should. However! It seems like flipping with IK's is messed up, so a few of my bones still face the wrong way, even though the ragdoll doesn't look completely wrong.

Pharan

Single-bone IKs are broken with flipX. This is a known bug.
@BinaryCats had a trick to work around it.
Basically, force a two-bone IK by adding a dummy parent bone that has the same position as your child bone, and add the constraint to those two bones instead of just the single bone.

Handle that IK bug, and if flipX makes ragdoll work, that's probably the way to go.

Single-bone IKs will be fixed in Spine v3, but it should be easy to undo the hack above if you're really disturbed by it and once v3 rolls out. But honestly, it's pretty harmless.

Cranktrain

Thanks Pharan. I'm trying to figure out how to add another (empty) bone to my existing constraint. How do I do that? Or switch a new constraint in for the old one.

I hope there is a way, because I have a lot of keyed animations, and if I have to reanimate them all to get this hack working that would be awful. And in that case I'd probably remove my IK's and redo them all with simple bone rotations, since IK seems to have a few issues.

But I won't need to reanimate, right, there's a way to edit existing constraints?

BinaryCats

because this sites search sucks: How to Fix IK Flipping Issues

And you cant add a bone to an existing constraint. You might be able to if you edit the json, and re import though?
The way to do it in editor is to delete the IK. If you have animation keys on that ik, you can create a temp bone, copy all the key froms from said ik, to the temp bone, then delete. Remake the fixed IK, and copy the keys from temp bone to IK

Cranktrain

Thanks BinaryCats, that's a very clear explanation.

I think my main problem is that I don't want to redo all my animations just because I can't edit an existing constraint. Is there a way to do that?

If not, I think I may have to wait till Version 3, which I hear will be fix negative-scale issues.

decoamorim

Thanks for the support guys!

It seems BinatyCats came with a temporary solution for it.

But in a chain of bones, for example a leg, that have a "Tie Bone - Thin Bone - Foot Bone - Middle Foot Bone - Tip Foot Bone "
The fake bone must be father of all the chain? Or each bone must have a fake father bone?

The IK have to work with both fake and wanted bone? Or just the child of the fake bone?

There is a prediction when V3 comes out? (It just did, but not for Unity right?)

Cranktrain

I would guess (and these are just my imaginings) that now that Spine version 3 is out, spine-csharp and spine-unity will be updated very soon, perhaps in the next couple of weeks. Spine for C# and Unity projects is 'broken' (for version 3, currently) and so Esoteric Software will obviously want to let the features cascade down into all the runtimes. This is probably the best way to do it, maintaining so many runtimes isn't easy, so I'm sure we can bear with a week or so of incompatibility issues. Unity is probably the most popular runtime, after all, it does have its own forum Group, so I imagine attention will start here first.

So given that Spine 3 has been released, I bet that the hack BinaryCats has described won't be required when full support for V3 hits the Unity runtime, and you might want to just wait till then.

I'm also guessing that Mitch's super-rad Project Magelight lighting work will come soon, perhaps in the very same update as Version 3 support.

When V3 comes out my stuff will open like flood gates. - Mitch

Guessing over!

decoamorim

This project is amazing Cranktrain.
Cant wait!