Bug 19568

Summary: SVG animateMotion: calculation of rotate (auto) sometimes fails on bézier curves
Product: WebKit Reporter: Andreas Neumann <a.neumann>
Component: SVGAssignee: Nobody <webkit-unassigned>
Status: NEW    
Severity: Normal CC: ahmad.saleem792, eric, ericwilligers, graouts, karlcow, koivisto, krit, sabouhallawa, webkit-bug-importer, zimmermann
Priority: P2 Keywords: InRadar
Version: 528+ (Nightly build)   
Hardware: Mac   
OS: OS X 10.4   
URL: http://www.carto.net/papers/svg/samples/path_animation.svg
See Also: https://bugs.webkit.org/show_bug.cgi?id=258776
Bug Depends on:    
Bug Blocks: 41761    
Attachments:
Description Flags
This test page demonstrates occasional flickering at the end of the animation.
none
test case
none
testcase-targeted
none
testcases without visible issues. none

Andreas Neumann
Reported 2008-06-16 01:31:31 PDT
http://www.carto.net/papers/svg/samples/path_animation.svg The airplane symbol in the given example sometimes "jumps/flickers". It seems that in some occasions there is a problem with calculating the orientation of objects moving along the path.
Attachments
This test page demonstrates occasional flickering at the end of the animation. (3.14 KB, text/html)
2012-11-16 06:35 PST, Alexander Paschenko 		no flags
Details
test case (56.36 KB, image/svg+xml)
2022-05-31 13:44 PDT, Said Abou-Hallawa 		no flags
Details
testcase-targeted (9.87 KB, text/html)
2026-04-01 07:11 PDT, Karl Dubost 		no flags
Details
testcases without visible issues. (9.82 KB, text/html)
2026-04-01 07:12 PDT, Karl Dubost 		no flags
Details
Show Obsolete (1) View All Add attachment proposed patch, testcase, etc.
Eric Seidel (no email)
Comment 1 2008-07-03 22:04:55 PDT
Agreed.
Andreas Neumann
Comment 2 2008-10-14 11:23:50 PDT
I wonder if anyone had been able to look at this bug?
Dirk Schulze
Comment 3 2011-05-26 23:58:06 PDT
Rob and me realized that it even got worse. The plane is not visible at all in trunk.
Nikolas Zimmermann
Comment 4 2012-02-13 09:03:25 PST
(In reply to comment #3) > Rob and me realized that it even got worse. The plane is not visible at all in trunk. It's visible again in trunk, but still flickering.
Alexander Paschenko
Comment 5 2012-11-16 06:35:11 PST
Created attachment 174671 [details] This test page demonstrates occasional flickering at the end of the animation.
Alexander Paschenko
Comment 6 2012-11-16 06:37:20 PST
Comment on attachment 174671 [details] This test page demonstrates occasional flickering at the end of the animation. My bad, attached the file to a wrong bug. Please delete this attachment.
Eric Willigers
Comment 7 2017-10-07 03:07:18 PDT
The example link no longer works. Should the status be updated to WONTFIX?
Ahmad Saleem
Comment 8 2022-05-29 17:18:37 PDT
I was able to retrieve snapshot of Test URL and relevant SVG from Wayback Archives and upload it to "JSFiddle" in below link. Link - https://jsfiddle.net/u8wvqzg4/ This bug is still reproducible in Safari 15.5 and Safari TP 146. It is not reproducible in Chrome Canary 104 and Firefox Nightly 102 and there is no flickering of plane icon on flight path. Thanks!
Radar WebKit Bug Importer
Comment 9 2022-05-31 10:34:41 PDT
<rdar://problem/94162061>
Said Abou-Hallawa
Comment 10 2022-05-31 13:44:15 PDT
Created attachment 459902 [details] test case
Karl Dubost
Comment 11 2026-04-01 07:11:09 PDT
Created attachment 478889 [details] testcase-targeted
Karl Dubost
Comment 12 2026-04-01 07:12:09 PDT
Created attachment 478890 [details] testcases without visible issues. For the bug to be visible it requires to have very large coordinates, it seems.
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