Animations: storing key frames in typed arrays #13434
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Please make sure to label your PR with "bug", "new feature" or "breaking change" label(s). |
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Please make sure to label your PR with "bug", "new feature" or "breaking change" label(s). |
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Snapshot stored with reference name: Test environment: To test a playground add it to the URL, for example: https://babylonsnapshots.z22.web.core.windows.net/refs/pull/13434/merge/index.html#WGZLGJ#4600 Links to test babylon tools with this snapshot: https://playground.babylonjs.com/?snapshot=refs/pull/13434/merge To test the snapshot in the playground with a playground ID add it after the snapshot query string: https://playground.babylonjs.com/?snapshot=refs/pull/13434/merge#BCU1XR#0 |
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It's quite a mammoth PR! I'm not really proficient with the animation system of Babylon.js, so I'm not sure I can help a lot on the structural/architectural review side... However, I can always review the code itself! Also, I think our animation system will possibly(/probably?) undergo some changes in the next weeks or months, so I wonder if it's the right time for such a big update to the system... cc @bghgary, @sebavan, @deltakosh, @RaananW |
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Wow! From quickly browsing the changes, it seems like some changes were made to central processes like the gltf loading process. are there any breaking changes here? |
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Let me convert as a draft during the discussions to prevent any accidental merges |
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In gltf loader, a flag |
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Keyframes in Babylon.js are stored with array of objects. Some animations exported with millions of key frames, with the object mode, it would take more memory than stored with typed arrays, like Float32Array. Without the object per frame, it would be much harder for features like per-frame interpolation and tangent to be implemented, so this could be an optional feature for those suffering too many keyframes without these advanced features. For AnimationCurveEditor it is hard to fully adapt it to CompactAnimation, maybe the fast way it to convert CompactAnimation to Animation, and replace all possible usage to converted animation. Not supported yet: * CUBICSPLINE animation with tangent * per-frame interpolation or tangent * serializing GLTF animation with quantization and 4-bytes alignment Forum link: https://forum.babylonjs.com/t/animations-storing-key-frames-in-typed-arrays/36566
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Long overdue update. @myfreeer you can not imagine how many discussions you helped us having in the core team regarding this topic :-) and this is for the best !!! Basically, we would like to use a system similar to what you are proposing here for our overall animation system :-) Unfortunately, we are too close to our 6.0 release to integrate those changes now and we would like them to be fully back compatible and working with all our feature set. What I propose is to close this PR and let @Popov72 integrate your changes as part of a broader revamp starting as soon as 6.0 will be released (in a couple months). You can track the issue here: #13534 Big thanks for the great contribution and sorry again we can not integrate immediately, hope it does not disrupt your plans too much. |
Keyframes in Babylon.js are stored with array of objects. Some animations exported with millions of key frames, with the object mode, it would take more memory than stored with typed arrays, like Float32Array.
Without the object per frame, it would be much harder for features like per-frame interpolation and tangent to be implemented, so this could be an optional feature for those suffering too many keyframes without these advanced features.
For AnimationCurveEditor it is hard to fully adapt it to CompactAnimation, maybe the fast way it to convert CompactAnimation to Animation, and replace all possible usage to converted animation.
Not supported yet:
Forum link:
https://forum.babylonjs.com/t/animations-storing-key-frames-in-typed-arrays/36566