TypeError: toValue.subtract is not a function

Bugs
1

Hello Babylon.js community,

I’ve discovered a potential bug in the animation system where Vector3 interpolation loses its type during runtime animations.

Description: During scene rendering with runtime animations, the animation._interpolate() method is returning plain objects instead of Vector3 instances for ANIMATIONTYPE_VECTOR3, which causes vector operations of subtraction to fail.

Current Behavior: During interpolation, we get:
fromValue = _Vector3 {_isDirty: true, _x: 375.89759748328, _y: 78.7461339178, _z: -657.0282096862}
toValue = {isDirty: true, x: 1399.8330523717, y: 660.6643702683, z: -849.4280001309}

When trying to perform operations, we get:

TypeError: toValue.subtract is not a function in Line 595 File: runtimeAnimation.ts

Expected Behavior: Both fromValue and toValue should be proper Vector3 instances that maintain their vector operation methods during interpolation.

Environment:

  • Babylon.js version: 7.41.1
  • Occurs in all browsers and OS

Can anyone else confirm this behavior?

Thanks for your help!

2

Welcome aboard!

Could you make a reproduction in the Playground? I think Vector3 animation is the most common type of animation, it would be strange if nobody had encountered this bug before…

3

Just looked back at the problem it’s problem from our side we were passing serialized vectors instead of actual vectors causing the problem.
We can close this is not a bug

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