Hello, I baked many animations in a texture, when I play an animation I always set the animation offset to 0, but I observe that the animation offset depends on time. I challenged ChatGPT and the IA told me this is the expected behavior since the first frame is computed with the uniform time injec…

Illustration in video : [Babylonjs VertexAnimationTexture offset 0 problem] When I click on a button, I set a animation : this.thinInstancesAnimParameters.set( animationParams, thinIndex * 4); this.thinMeshes.forEach((m: Mesh): void => { m.thinInstanceSetBuffe…

You can try to set BakedVertexAnimationManager.time = 0 when you start a new animation?

Totally forgot this manager, this is the solution thank you ! Babylon team 1 - ChatGPT 0 :grin:

@Evgeni_Popov Sadly I just noticed that setting BakedVertexAnimationManager.time = 0 impacts all currents played animations. I suppose I could create an instance of BakedVertexAnimationManager for each thin instance but I don’t really like this idea… Do you see another solution ?

Nice thank you, I initially tried these kind of fomula but without success :sweat_smile: The solution given in playground : // This method will compute the VAT offset to use so that the animation starts at frame #0 for VAT time = time passed as 3rd parameter computeOffsetInAnim(fromFrame, toFrame,…

Yes, I think a documentation page in our documentation repository on VAT in real projects would be a nice addition, if anyone is up to the challenge!

Update VATs to explain how to set offset with thin instances master ← ylacaute:ylacaute-update-vat opened 10:05AM - 14 Apr 25 UTC (UTC) [image] …

VAT - How to start animation at offset 0?

Questions

Evgeni_Popov April 14, 2025, 7:32am 6

See my answer here and the corresponding PG: the function computeOffsetInAnim() should be what you need.

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VAT - How to start animation at offset 0?

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