[chimerax-users] crossfade warps image when transitioning

[Liz Kellogg]

Hi Tom

Thanks so much for the advice! I should have suspected. I'll try it out on
my Linux box in the meantime.

Liz



On Thu, May 23, 2019, 8:00 PM Tom Goddard <goddard at sonic.net> wrote:

> Hi Liz,
>
>   Let's talk about a specific test case.  If I run the following commands
> I see atoms slowly fade in over 5 seconds
>
>         open 3gbp
>         hide #1
>         crossfade 300 ; show #1
>
> From what you describe, it doesn't fade properly on your computer.  Your
> description that it looks like the lower left corner is shown makes me
> suspect you have a particular model of MacBook Pro with retina screen and
> only Intel graphics where we have reports that saving an image in ChimeraX
> sometimes only shows the lower left corner of what is shown on the scene.
> I just tried the above commands and also a version that made a movie
>
>         movie record ; crossfade 300 ; show #1 ; wait 300 ; movie encode
> ~/Desktop/test.mp4
>
> on a 2019 iMac with retina display and it all worked as expected.
>
>   So I suspect your problem is a know bug in Apple's graphics driver on
> your particular laptop.    It is only certain MacBook Pro laptops from a
> few years ago where we have seen the problem.  Unfortunately only Apple can
> fix that.  Apple decided a few years back to make its own proprietary
> graphics library called Metal and so their support of the OpenGL graphics
> standard which ChimeraX uses and works on Windows, Linux, and Mac is poor.
> If you have any other computer you can use, I suggest trying your same
> steps on that computer -- I suspect it will work.
>
>         Tom
>
>
> > On May 23, 2019, at 4:35 PM, Liz Kellogg <lizkellogg at gmail.com> wrote:
> >
> > Hi all
> >
> > OK I have a real problem this time (not a silly problem on my end). I'm
> trying to make movies in chimerax, and I used to be able to use the
> crossfade function in Chimera to smoothly interpolate two images to change
> the scene.
> >
> > However, in ChimeraX, when I use the crossfade function it either warps
> the first image or it somehow interpolates a zoomed in view of the lower
> left corner of the first image into the second, which makes for a jarring
> transition.  Closing and re-opening ChimeraX seems to change the behavior,
> but I still can't get a smooth transition between image 1 and image 2. Any
> idea how to fix this? I thought perhaps setting the view size before
> starting to record the movie would help, but that doesn't seem to work.
> >
> > Thanks a bunch.
> >
> > Best
> > Liz
> > _______________________________________________
> > ChimeraX-users mailing list
> > ChimeraX-users at cgl.ucsf.edu
> > Manage subscription:
> > http://www.rbvi.ucsf.edu/mailman/listinfo/chimerax-users
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://plato.cgl.ucsf.edu/pipermail/chimerax-users/attachments/20190523/504c5c95/attachment.html>