Bug 220856

Summary: TransformationMatrix::Recompose() and Decompose() incorrectly transpose rotation
Product: WebKit Reporter: Imanol Fernandez <ifernandez>
Component: AnimationsAssignee: Nobody <webkit-unassigned>
Status: NEW ---    
Severity: Normal CC: cdumez, dino, graouts, krit, mrobinson, simon.fraser, webkit-bug-importer
Priority: P2 Keywords: InRadar
Version: WebKit Nightly Build   
Hardware: All   
OS: All   

Description Imanol Fernandez 2021-01-22 03:05:45 PST
The computation of quaternions during matrix decomposition looks like it's based off of the matrix transpose. The matrix data is actually column major order but the quaternion operations seem to assume row major order.

More info in the equivalent chromium bug:
https://bugs.chromium.org/p/chromium/issues/detail?id=929841
Comment 1 Radar WebKit Bug Importer 2021-01-29 03:06:11 PST
<rdar://problem/73747851>