Problem with rotation and labels

[jeroen.vanweperen@…]

The following bug report has been submitted:
Platform:        Windows-10-10.0.22631
ChimeraX Version: 1.9 (2024-12-11 19:11:19 UTC)
Description
After adding any labels to residues on the structure with the command [label #1 & sel text "test" height 2], rotating the structure with the left mouse button causes the view to lock onto any part of the structure that comes in front of the camera and will start rotating around that part, repeating each time some new part comes close into view. This causes the view to zoom in more and more each time some part comes close to the camera. Without the labels, the rotation functions as normal and keeps the same distance from the camera to the protein.

Log:
Startup Messages  
---  
note | available bundle cache has not been initialized yet  
  
UCSF ChimeraX version: 1.9 (2024-12-11)  
© 2016-2024 Regents of the University of California. All rights reserved.  
How to cite UCSF ChimeraX  

> open "C:\Users\weper004\OneDrive - Wageningen University &
> Research\Jeroen\Projects and Experiments\2024-05 Comparative
> modelling\AlphaFold 3 eiwitten\Mi-1 updated sequence\Mi9 + ADP.cif" format
> mmcif

Chain information for Mi9 + ADP.cif #1  
---  
Chain | Description  
A | .  
  
Computing secondary structure  

> ui tool show "Show Sequence Viewer"

> sequence chain /A

Alignment identifier is 1/A  

> select /A:70

9 atoms, 8 bonds, 1 residue, 1 model selected  

> select /A:43-70

238 atoms, 242 bonds, 28 residues, 1 model selected  

> select /A:131

10 atoms, 10 bonds, 1 residue, 1 model selected  

> select /A:131-132

18 atoms, 18 bonds, 2 residues, 1 model selected  

> select /A:131-132,250-252

38 atoms, 37 bonds, 5 residues, 1 model selected  

> select /A:131-132,250-252,370-402

299 atoms, 306 bonds, 38 residues, 1 model selected  

> select /A:131-132,250-252,370-402,582-584

320 atoms, 326 bonds, 41 residues, 1 model selected  

> select /A:131-132,250-252,370-402,582-584,733-735

344 atoms, 349 bonds, 44 residues, 1 model selected  

> label #1 & sel text test height 2




OpenGL version: 3.3.0 - Build 31.0.101.4887
OpenGL renderer: Intel(R) Iris(R) Xe Graphics
OpenGL vendor: Intel

Python: 3.11.4
Locale: nl_NL.cp1252
Qt version: PyQt6 6.7.1, Qt 6.7.1
Qt runtime version: 6.7.3
Qt platform: windows

Manufacturer: LENOVO
Model: 21HESA8900
OS: Microsoft Windows 11 Enterprise (Build 22631)
Memory: 34,016,735,232
MaxProcessMemory: 137,438,953,344
CPU: 12 13th Gen Intel(R) Core(TM) i5-1335U
OSLanguage: en-US

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[Tom Goddard]

Thanks for the report. I can reproduce this bug on Mac.

open 1a0m
label /A text "test" height 2

Zoom in close so molecule extends beyond edge of screen and rotate. Zoomed out does not have the problem because the center of rotation calculation then uses the center of the scene instead of the front center point.

I think it is a bug caused by the labels reorienting to always face the viewer. Testing this by causing the labels not to reorient

label orient 360

prevents the problem (but of course the labels don't reorient). I'll look into fixing this in the next week or so and will report when it is fixed.

[Tom Goddard]

Fixed.

The 3d labels reorient to face the camera when the scene is rotated. That causes a "shape changed" notification and that causes the center of rotation to update. I fixed this with an unpleasant hack to the 3d label code so that it does not cause a "shape changed" notification when reorienting labels due to a camera move. Couldn't think of any better way to handle this.