Clip planes don't move smoothly between named views

[rpeng@…]

The following bug report has been submitted:
Platform:        Windows-10-10.0.22621
ChimeraX Version: 1.6.1 (2023-05-09 17:57:07 UTC)
Description
Hi Tom,
I didn't find a way to reply previous email, but thank you for the help!

I noticed a new feature that may be called a bug. So in this session, from p2, I did a rotation and narrow clipping to get p3. But when do 'view p2; wait; view p3 60' the clipping is not changing gradually. 

I found out (reproducible) that it has something to do with how I narrow the clipping. If I use command 'clip near 1' to get p3, then the near plane will not change gradually. If I use mouse to move the plane in the GUI to get p3, then it's working properly.

It's fine for me for now. But there are definitely times when a precise control of clipping plane using numbers is needed.

Thanks for your help!
Best,
Ruizhi

Log:
UCSF ChimeraX version: 1.6.1 (2023-05-09)  
© 2016-2023 Regents of the University of California. All rights reserved.  
How to cite UCSF ChimeraX  

> open "C:\\\Users\\\kfzr5\\\OneDrive - Florida State
> University\\\Drp1\\\volumes\\\PAorig\\\PA_raw.mrc"

Opened PA_raw.mrc as #1, grid size 224,224,224, pixel 4.04, shown at level
689, step 1, values float32  

> set bgColor white

> ui tool show "Side View"

> view name p1

> volume #1 level 383.5

> view name p2

> view name p3

> view p1

> view p2 60

> view p3 60

> view p2

> turn x 90

> clip near +20

[Repeated 18 time(s)]

> clip far -20

[Repeated 16 time(s)]

> view name p3

> view p2

> view p3 60

> view p2

> turn x 90

> view name p3

> view p2

> view p3 60

> view p2

> turn x 90

> view p2

> clip near +20

[Repeated 13 time(s)]

> clip far -20

[Repeated 12 time(s)]

> view p3

> view p2

> clip near +20

[Repeated 17 time(s)]

> clip far -20

[Repeated 14 time(s)]

> view name p3

> view p2

> view p3 60

> view p2

> camera ortho

> view p2

> view p3 60

> view p2

> view p3

> view name p3

> view p2

> view p3 60

> view p2

> turn x 90

> view name p3

> view p2

> view p3 60

> view p2

> turn x 90

> clip near 50

[Repeated 5 time(s)]

> clip far -50

[Repeated 6 time(s)]

> view name p3

> view p2

> view p3 60

> view name p3

> view p2

> wait 10

> view p3 60




OpenGL version: 3.3.0 NVIDIA 526.98
OpenGL renderer: NVIDIA GeForce RTX 3070/PCIe/SSE2
OpenGL vendor: NVIDIA Corporation

Python: 3.9.11
Locale: en_US.cp1252
Qt version: PyQt6 6.4.2, Qt 6.4.2
Qt runtime version: 6.4.3
Qt platform: windows

Manufacturer: To Be Filled By O.E.M.
Model: To Be Filled By O.E.M.
OS: Microsoft Windows 11 Pro (Build 22621)
Memory: 68,642,189,312
MaxProcessMemory: 137,438,953,344
CPU: 16 AMD Ryzen 7 5800X 8-Core Processor             
OSLanguage: en-US

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[Tom Goddard]

This is not a bug. If you transition between two named views and one has clip planes and one does not, then the clip planes will not move smoothly. If both the starting view and the ending view has clip planes in different positions then the do interpolate smoothly no matter how the clip plane was set.

I tested this and it worked as expected both when I used "view near 1" and when I used the Side View to adjust the near clip plane.

[Tom Goddard]

Elaine, maybe it is worth adding to the documentation that when transitioning between views the clip planes will only move smoothly if both the start and end views have the clip plane.