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Copy and paste operation on f-curves do not respect keyframe tangent handles...
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System Information
win7 sp1 2XAsus ROG

Blender Version

Short description of error

I guess the title says it all... My animators were dismayed quite a bit when they saw this happening. Hoping its me again this time, cuz if Blender can't copy tangent handle orientations and paste them, that's a huge drag for animators... :(

Exact steps for others to reproduce the error
I've prepared a little demonstration video to clearly illustrate my problem... The scene file is also included in the rar file.



Event Timeline

Ajlan Altug (jacobo) raised the priority of this task from to Needs Triage by Developer.
Ajlan Altug (jacobo) updated the task description. (Show Details)
Ajlan Altug (jacobo) set Type to Bug.

I think there is a limitation for selecting and copying keyframes n Graph Editor.
You have to select f-curve and press V in source channel to hide all the others before copying.

Then, when you paste f-curves, default type of paste operator is set to Mix. So result is mixed with previous keyframe needed for F-curve creation.
If you press F6, you can change it to Overwrite All.
Previous Keyframe would be overwritten by the one at same frame and it would not mess-up tangent of copied keyframes that have handles type set to aligned.

Oh, thank goodness... It's so kind of you to get back to me on this board for a post that seemingly otherwise had to have been posted on a forum elsewhere. thank you, I appreciate it :) I've gone through the manual quite a bit, yet this must have escaped me somehow. The way it went though, I kinda tended to see it much as a limitation or maybe a bug, so I decided to post here.

Again, thank you for devoting your time, I know you guys are pretty busy, but thank you all the same :)

Cheers :)


That commit fixes one specific issue - before, pasting a curve over another ones having keyframes at the same time would not override existing keyframes' handles properties.

Copy/paste of fcurves remain a bit rough on the edges, but that's more like usual TODO, no more bug here. Thanks for the report! :)