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Issue metadata

Status: WontFix
Owner: ----
Closed: May 2016
Components:
EstimatedDays: ----
NextAction: ----
OS: All
Pri: 3
Type: Bug



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Matrix interpolation during transition takes long path

Project Member Reported by l...@chromium.org, May 6 2016

Issue description

Version: 50.0.2661.94 and 52.0.2727.0
OS: Linux

What steps will reproduce the problem?
(1) Go to https://jsfiddle.net/m44hr39q/
(2) Click on the black box, and see it do a ~360 flip

What is the expected output?
The starting and ending angles are so close, I expected the transition to do a tiny animation, e.g. barely move.

What do you see instead?
The transition takes the "long path" around, doing a ~360 flip.

I'm not familiar whether taking the short/long path is the intended behavior, but I would like to be able to control the direction (choose the shorter path).  Is this possible?

 

Comment 1 by samli@chromium.org, May 10 2016

Components: -Blink>CSS>3D Blink>CSS
Components: -Blink>CSS Blink>Animation
Labels: -OS-Linux OS-All
Status: WontFix (was: Untriaged)
Behavior seems consistent with firefox.

> I'm not familiar whether taking the short/long path is the intended behavior, but I would like to be able to control the direction (choose the shorter path).  Is this possible?

In general would not recommend use of matrix interpolation. Use other transform operations, add additional keyframes where necessary.

Comment 4 by l...@chromium.org, May 11 2016

Gotcha, thanks dstockwell@ and samli@ !

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