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a4f9eea8e5
Looks like this produces sensible results for interpolation with 0, though I'm not really convinced about the results from, let's say, 1px to 2000px in the attached test-case, I would've expected a linear interpolation from that to go through normal length interpolation. css-transforms-1 says: > Two transform functions with the same name and the same number of arguments > are interpolated numerically without a former conversion. The calculated > value will be of the same transform function type with the same number of > arguments. > > Special rules apply to <matrix()>. Which is what we do... I was going to file a spec issue but turns out that it's already addressed in css-transforms-2: https://drafts.csswg.org/css-transforms-2/#interpolation-of-transform-functions Which says: > The transform functions <matrix()>, matrix3d() and perspective() get > converted into 4x4 matrices first and interpolated as defined in section > Interpolation of Matrices afterwards. Differential Revision: https://phabricator.services.mozilla.com/D4942 --HG-- extra : moz-landing-system : lando