Skyrim in-nif animations not being imported/exported correctly.

[dafop]

Not sure if this is actually meant to be fully supported or not, but based on the recent focus on hkx I thought it might be. Example of incorrect values being returned on export below - also true for 'frequency' in NiTransformController, which seems to be forced to 1.0 regardless of original value.

[BadDogSkyrim]

I'll have a look. The forward/backward values have to be recalculated from Blender's bezier handles so the behavior may be correct even if the values differ.

Do you know what "frequency" does? I'd like to represent it in Blender if it has meaning.

[dafop]

Thanks! The animation does unfortunately appear to be altered by the process - the gear does not simply rotate, it accelerates and decelerates in its rotation.

Frequency is a divider for the animation timings so eg if you have a frequency of 0.25, all animations will take four times longer to complete (and frequency of 2 would halve that time). I suppose it's there so it's easy to modify the speed of any animation without having to change all the values in all the keys.

[BadDogSkyrim]

Huh. I dunno if Blender has an equivalent to frequency. I kinda don't think so.

I'd expect the start/stop behavior to change a bit, since those handles affect the curve at those points.

[dafop]

I guess you could 'multiply out' the frequency when you import it. But it's a bit of a shame to lose it entirely. It's sort of the equivalent of 'play at 2x, 4x speed' etc which would be very handy.

Is it possible to have the start/end of the beziers to correctly reflect the original values? Btw, the simple example I used above is... /meshes/dlc02/dungeons/dwemer/clutter/dweplatformgear01.nif

[BadDogSkyrim]

Yes, I expect I'll be able to fix this.

[dafop]

Great - thanks! Hope it's an easy job.

[BadDogSkyrim]

Fixed in next release.

I was not able to find even one vanilla nif that sets frequency to anything other than 1. Do you have an example? Cuz usually, things that aren't used don't work.

[dafop]

Thanks for fixing! I really wish there was more documentation freely available for nifs - so I'm really guessing at what frequency really represents, though it seems quite a fair assumption. Quite right - I can't find any vanilla nifs with a frequency set to anything but 1.0. I'm guessing this is because originally the animation was handled in 3DS and exported in a standard way from there, which always sets the frequency to 1.0. However, I can confirm that frequency changes are honoured in nifskope, CK and in Skyrim (and presumably other beth games).

Looking here (though obviously this is fallout) - https://geckwiki.com/index.php?title=NIF_Animation_Controllers - "Frequency: Scales the update time units to keyframe time units."