Extension KHR_animation_pointer

[ghost]

Add support for the upcoming extension KHR_animation_pointer.

[mikeskydev]

Just to note, I have begun working on an import implementation of this and have successfully animated the material base color property with KHR_animation_pointer. Thanks @hybridherbst for the great test asset!

2023-04-05_15-27-31.mp4

[hybridherbst]

Excellent! There's a few more sample assets, and you can always make your own by simply exporting with our UnityGltf fork at https://github.com/prefrontalcortex/unitygltf/tree/dev :)

Excited to see this come to glTFast!

[ptc-rgrasset]

@mikeskydev this is really fantastic, definitely really interested about this work !

Having at least base color + transparency support will definitely cover the core baseline of most of standard DCC (or CAD) tools. I I would love to see a PR when you are further along the line.

When you say import, I suppose you also mean runtime loading and not just editor import ?

[mikeskydev]

Thanks! I hope to bring a draft PR this week to see if I'm going along the right lines. I'll use this issue to document my progress before the PR:

So far I've implemented baseColorFactor which as you said covers a lot of cases. I've also started implementing KHR_texture_transform as required by my client, but as some initial logic in glTFast sets up texture transforms in C#, I may need to move the logic to the shaders instead otherwise the transforms are wrong.

Due to the way Unity's animation system works, I've also got a basic reverse material lookup just to get up to speed, but I want to improve that before a PR.

I've also observed that animating material color only works on Legacy animations, I'm not familiar enough with Mechanim to know if I'm doing something wrong or it (still) isn't supported there.

[mikeskydev]

2023-04-13_12-19-11.mp4

This should be all the animatable material properties that glTFast currently supports!

I'm going to do a bit more tidying up, then will submit a draft PR for some feedback.

[hybridherbst]

Nice! It does seem like the core animation capabilities have been lost from your video, e.g. blend shape weights, transforms.

[mikeskydev]

Yep, I was focusing on material pointers first but will attach the node pointers to the old routes in due course!

[mikeskydev]

Fairly happy with this now, would love some feedback! Unity-Technologies#7

[atteneder]

Thanks a lot!
Looking at it in Unity-Technologies#7