jumpy transitions between keyframes

[alisterburt]

looks like there has been some sort of regression which makes the transitions between keyframes jump around

I'm not sure under what circumstances it occurs exactly yet, it seems like playing with the preview slider before capturing keyframes is part of the problem

https://user-images.githubusercontent.com/7307488/142078462-9089fa3e-c61d-43ad-bb99-59bcd389c6b4.mp4

@maweigert you were using the plugin recently, is this something you ran into?

[maweigert]

@maweigert you were using the plugin recently, is this something you ran into?

Hm, I didn't run into it, yet I can reproduce it...

[alisterburt]

thanks for taking a look! I'll keep digging 🙂

[alisterburt]

unsuccesful bug hunt, need to call it quits for tonight, mini report...

• appears with version 0.0.2 of napari-animation from pip and on main
• appears with recent napari versions 0.4.10 and 0.4.11
• appears with recent vispy versions 0.8.1
• appears to be a zoom problem but zoom values in Animation._frames.camera['zoom'] appear correct for a jumpy animation

for i in range(31):
    print(animation._frames[i].camera['zoom'])

1.890401643454949
1.8904016434549489
1.8904016434549489
1.8904016434549489
1.8904016434549487
1.8904016434549487
1.8904016434549487
1.8904016434549487
1.8904016434549487
1.8904016434549487
1.8904016434549487
1.8904016434549487
1.8904016434549484
1.8904016434549484
1.8904016434549484
1.8904016434549484
1.8904016434549484
1.8904016434549484
1.8904016434549484
1.8904016434549487
1.8904016434549487
1.8904016434549487
1.8904016434549487
1.8904016434549487
1.8904016434549487
1.8904016434549487
1.8904016434549487
1.8904016434549489
1.8904016434549489
1.8904016434549489
1.890401643454949

I recently installed this and other things into a fresh environment on another machine and didn't have any problems. Bug is definitely not super reproducible so far...

[alisterburt]

fixed upstream in vispy!