Scaling animation cannot handle negative numbers

[abek42]

Description:
Attempting to scale to -1 from 1 only completes till 0.001 and stops there.
Potential duplicate of #4263 but now with example code.

• A-Frame Version: >1.0.0
• Platform / Device: Win10/Firefox 73.0.1
• Reproducible Code Snippet or URL: https://judicious-morocco-9avsv2b5p.glitch.me/scaleAnimBug.html
  Click once to reveal letter 'E' made out of blocks
  Click second time to attempt scale to -1 1 1
  Expected result: A mirrored 'E'.
  Actual result: Thin sliver with scale.x = 0.001

Thanks.

[mneunomne]

Experiencing the same issue, following animation property set entity with scale "0 1 1" instead of "-1 1 1"
animation__enter_scale="property: scale; from: -1 1 0.5; to: -1 1 1.0; dur: 500; startEvents: show; dir: alternate;"

[koktavy]

This issue remains, tested on both 1.1.0 and 1.2.0

[mrxz]

Addressed by #5404. It seems the animation component tries to prevent zero values by capping at an epsilon. This (unintentionally?) prevented negative scales, but this is no longer needed. So once the check is removed negative scales should work.