= ChimeraX Developer Meeting =

Attendance: 

January 12, 2026

= Agenda =

* Qt 6.9 not saving custom colors on Windows
* ~~!SciPy missing symbol on macOS 12~~
* ~~Update Qt to 6.10.1 after holidays~~
* OpenGL ES for Rasberry Pi
* Flying edges surface generation
* Decide on numpy, PySide, Python updates for 1.12 (3.13 or 3.14?)
* Brainstorm about log performance, #9909
* Chimera not working with macOS 26, graphics pane positioned over command-line.
* Work in progress reports
* Inside ribbon color?
* Make Chimera end-of-life bug report and registration changes.


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= Discussion =

* Qt saving custom colors
 - Eric will add Qt code to save custom colors at end of session and restore at start of session on Windows.
 - Qt 6.9 removed this behavior and left it up to apps to implement it.

* Rocky 9 build failure
 - Zach will look at why Rocky 9 build email says it failed but it actually succeeded.
 - Zach will remove Rocky 8 from the build email, we no longer support Rocky 8.

* Qt updates
 - Zach updated daily build to Qt 6.10.1.
 - Also TechPreview is using PySide 6.10.

* OpenGL ES for Rasberry Pi
 - Discussed our long past deliberations on supporting ChimeraX on mobile devices, web browsers using OpenGL ES.
 - Did not seem we could do a good job on those devices given our limited resources.
 - Zach tried OpenGL ES for Linux ARM, including possibly HPC clusters.
 - Tom does not want to face the complexity, bugs, and poor performance of OpenGL ES on low power devices.
 - Still want Linux ARM ChimeraX build but with OpenGL (not ES).
 - Zach will test if ChimeraX OpenGL 3.1 works on Rasberry Pi.  Normally ChimeraX asks for 3.3 minimum.

* Flying edges surface generation
 - Discussed including flying edges contour surface calculation.
 - Tom wants OpenMP dependency only to be part of flying edges, not all the C++ volume code, in case OpenMP fails on some platforms.
 - Zach will look into putting flying edge in separate shared library in the map bundle.

* numpy, PySide, Python updates
 - If we update to Python 3.13 we probably also want to update to numpy 2 since numpy 1 builds are not provided by PyPi for Python 3.13.
 - We want to try moving from PyQt to PySide.
 - The outstanding PySide bugs were fixed by Qt 6.10 in Zach's tests.
 - The TechPreview ChimeraX currently uses PySide.
 - Will decide on updates when Greg returns.

* Appending to long Log slows ISOLDE
 - Eric wants ideas for how to avoid appending log messages slowing down ChimeraX.

* Chimera macOS 26 graphic mispositioned
 - Eric is still looking into fixing the Chimera mispositioned graphics pane on macOS 26.

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= Action Items =