[chimerax-users] Re: Trackpad rotation

Hi Tom, Yes I’ve tried playing with that, and I agree 2 is better, but I still think there is more to it than that. Here is a comparison where I try to perform the same sequence of operations in Chimera and ChimeraX, on the same model - first pinch-zooming, then twist-rotating (this has the twist sensitivity set to 2 for ChimeraX):  In Chimera, both the pinch to zoom and the twist to zoom work pretty well independently - you do get some mixing but not much. In ChimeraX, even with the modified settings, when I pinch to zoom, it rotates quite a bit, and when I twist to rotate, it ends up zooming quite a bit more than I would like. Is this how it looks for you? I tried to make the gestures I used as close to identical as I could although of course hard to make them exactly the same, but it gives a sense of what I’m seeing hopefully Cheers Oli

On Aug 22, 2023, at 8:37 PM, Tom Goddard wrote:

Hi Oli,

Comparing ChimeraX trackpad pinch zoom to Chimera I observed that ChimeraX exhibits more rotational jitter. I've reduced the jitter by reducing the ChimeraX trackpad twist speed from 6 to 2. When you place two fingers on the trackpad and move them in a circle about the midpoint between the fingers this twist produces a rotation of the model about an axis perpendicular to the screen. A 90 degree finger twist was producing about a 450 degree rotation in ChimeraX while in Chimera it produces only 180 degree rotation. More details here:

https://www.rbvi.ucsf.edu/trac/ChimeraX/ticket/9623

You can adjust the twist speed in your current ChimeraX using menu ChimeraX / Settings, Trackpad tab, Trackpad Twist Speed option. If you want the most stable zoom you can even set that to 1 or 0 so that twist is minimized or eliminated.

Tom

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On Aug 22, 2023, at 2:58 PM, Tom Goddard via ChimeraX-users wrote:

Hi Oli,

I agree pinch zoom in ChimeraX on a Mac trackpad always does some rotation too. It may be in Chimera it better separated pinch zoom from two finger rotation. I'll investigate.

Did you know that 4-finger drag up or down on a Mac trackpad in ChimeraX does a zoom?

Tom

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On Aug 22, 2023, at 1:54 PM, Oliver Clarke via ChimeraX-users wrote:

Hi,

The trackpad zoom/rotation settings in ChimeraX seem very different from “old” Chimera. Is there any way to replicate the behavior from Chimera?

Specifically, when I pinch to zoom in ChimeraX, I often find the view rotating a lot, unless I am very careful, which does not happen in Chimera. I have tried playing around with the trackpad twist sensitivity, but so far have been unable to find settings similar to the default in Chimera.

Cheers Oli _______________________________________________ ChimeraX-users mailing list -- chimerax-users@cgl.ucsf.edu To unsubscribe send an email to chimerax-users-leave@cgl.ucsf.edu Archives: https://mail.cgl.ucsf.edu/mailman/archives/list/chimerax-users@cgl.ucsf.edu/

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