Bug 220856 - TransformationMatrix::Recompose() and Decompose() incorrectly transpose rotation
Summary: TransformationMatrix::Recompose() and Decompose() incorrectly transpose rotation
Status: NEW
Alias: None
Product: WebKit
Classification: Unclassified
Component: Animations (show other bugs)
Version: WebKit Nightly Build
Hardware: All All
: P2 Normal
Assignee: Nobody
URL:
Keywords: InRadar
Depends on:
Blocks:
 
Reported: 2021-01-22 03:05 PST by Imanol Fernandez
Modified: 2022-01-12 05:16 PST (History)
7 users (show)

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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>