The constrain axis manipulator often fails to function when the 3d view is maximised #53212
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Reference: blender/blender#53212
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Blender Bugs
System Information
OSX 10.13
NVIDIA GeForce GT 755M 1 GB
Blender Version
Broken: 2.79
Worked: Never? spotted it about 7 years ago, but only just around to filing this!
Short description of error
The constrain axis manipulator often fails to function when the 3d view is maximised
Exact steps for others to reproduce the error
I think this is the reason I have never fully reported it, because I can’t figure out the exact cause. However, these things I know for sure….
3d View must be maximised (Shift+Spacebar)
Must be in Perspective view! Flipping back between Ortho and Perspective (Numpad 5) you can see that the Axis Constraint works fine in Ortho, but not in Perspective.
Once the bug is ‘found’, it is persistent…
You can ShitSpacebar back to normal UI, all will work, but if you immediately ShiftSpacebar back to maximised, the constraint will fail again.
Also, with regard to Blender version and operating system, I have noticed this bug for many, many years on multiple computers on both PC and Mac computers.
Hope you can find it! Will report back if I figure out the exact reproduction steps…
I currently have the bug in Edit Mode, but it can definitely happen in Object Mode too.
Cheers
Wayne
Changed status to: 'Open'
Added subscriber: @slowboy
Added subscriber: @zeauro
The fact that problem did not happen one day but was present next day makes me think that it might be relative to preferences or addons.
Next time, it happens try to save .blend file and to reload factory settings.
Currently, I did not succeed to reproduce on linux.
Added subscriber: @mont29
Am sorry, but we need a valid, stable way to reproduce an issue to investigate it. Cannot reproduce it here either (debian testing system with GTX850m and current NVidia drivers), this could be caused by a lot of stuff (buggy drivers, buggy hardware, …). First to try I’d say is to see if you can reproduce it on other systems (ideally same ones, or close to).
Ahah! I've found the cause!! So, happened again this morning, and I was almost considering making a video to show you what I meant, but while playing around with the 'bug' I finally realised that some objects would still constrain - then it dawned on me that those objects were further away - so, I zoomed out to move my problem object further away, and, lo and behold - axis constrain! So, I'm supposing it's a clipping plane thing? If the object is too close to the viewer, it is out of some operational clipping bounds and therefor doesn't get the constrain code?
Would you mind trying to recreate yourself? I am able to 'fix' the problem when it happens (by zooming out), but wonder if you are able to 'create' the problem by zooming in?
Thanks
Wayne
Added subscriber: @AnthonyEdlin
Could not reproduce here on linux. Could be OS specific. File with bug happening for you would be needed.
Ubuntu 16.04.3 LTS
Blender 2.79 build master
66a6d16
NVIDIA 1080 driver 384.90
Added subscriber: @fablefox
Changed status from 'Open' to: 'Archived'
Thanks for the report but it would be helpful if you add a blend-file to the report that demonstrates the issue at hand.
Since last asking for information it has been 7 or more days, due to the policy of our bug tracker we will have to archive the report until the requested information is given.
Changed status from 'Archived' to: 'Open'
AxisConstraintsFails.blend
Very sorry for the late reply, guys - I somehow missed the request for an example file.
So, I've got one now, and reopened the bug, hope that's ok?
Within the file, select any of the multiple objects in the viewport and move it using an axis constraint - you will find that the axis constraints function.
Now, zoom in to any object, with numpad period, or just zoom so that an object fills the viewport, and try using an axis constraint again - for me, the axis constraint disappears and the object's movement is not constrained at all.
Would be interested to see if anyone else can reproduce this?
Thanks
Wayne
Added subscriber: @VukGardasevic
Some additional information was provided.
Marking as Needs Triage.
Added subscriber: @lichtwerk
cannot reproduce this, even with provided file (linux fedora 27, 970M with 384.98 drivers)
Added subscriber: @FloridaJo
I can't reproduce here on macOS.
Zoom in, zoom out, fullscreen, perspective, ortho, '.'
Constraint axis is always there for me.
So, I think unless we find a reproducable case here [apparently this cannot be reproduced with provided file]: marking as incomplete again
No prob - weird though - has always been 100% reproducable for me, for literally years, and on multiple versions and operating systems - it's just that it's taken me several years to figure out why it was happening for me (being too 'close' to the object) - but I swear it's been there forever, and still is! XD
No worries though, I'll come back if I have any insights.
ps. Oh, by the way, Joel - it's definitely not an Ortho thing, 100% Perspective view - ortho is always fine.
Cheers
Wayne
Changed status from 'Open' to: 'Archived'
No point in keeping open something no developper can reproduce… Archiving for now, thanks for the report anyway.