Rotation with snap sets values to NaN

[rcorre]

Godot version:

3.2.1.stable.custom_build.f0a489cf4

That's 3.2.1 with two patches:

• Use QuickOpen to load resources in the inspector. #37228
• Switched the language server from websockets to TCP #35864

OS/device including version:

GNU/Linux 5.6.15-arch1-1
GTX 970
GLES3

Issue description:

When I rotate an object with snapping (either by pressing y or holding ctrl while dragging the gizmo),
Godot sets all the rotations to NaN. If I save the scene after doing this, Godot will refuse to load the scene
again, saying it encountered an error while parsing.

Rotation without snap works normally.

Steps to reproduce:

Unfortunately this isn't happening in a new project, I'm unsure what I did to get my current project into this state.

Minimal reproduction project:

https://gitlab.com/rcorre/quest

[nobuyukinyuu]

big guess here but the rotational value of a node an old project might've had a number in it that evaluated out to something that maybe resulted in a 0/0 operation (maybe through roundoff error) -- applying rotation has always done some funky things with snap and maybe a change in how it's processed between editor versions let the door open for a NaN to sneak in when mixing old and new data values.

If there's a specific node in your project that this occurs on, you might be able to replicate it in a new project by manually assigning the same rotational value to the node from a text editor (not godot itself). This would require a rotational value that isn't NaN, since once a NaN sneaks in it will spread to other values. If you keep your code in a repo you may have a specific commit to track down where when adjusting the rotation from the editor the NaN first sneaks in.

[rcorre]

Good idea, but unfortunately there's no NaN in any scene files, and it happens on any object.

[rcorre]

In the logs I see

 servers/visual/visual_server_scene.cpp:601 - Condition "Math::is_nan(v.x)" is true.

[rcorre]

It happens even if I create a new scene. I'll try to build debug bits and dig in tonight.

[rcorre]

Debugging that line was no help, as it is just noticing the NaN, not creating it. @nobuyukinyuu might be on to something with a bad config though. I just removed the entry for this project from ~/.config/godot/projects/ and the issue disappeared.

[rcorre]

cfg.zip

Here's the offending config. I can't find anything suspicous.

[rcorre]

There's a fair chance I accidentally opened this project with a master build and screwed up my config this way. It probably isn't worth pursuing unless you're really curious.

[rcorre]

Just happened to me again. I'm reasonably sure I didn't open this particular project with a master build. I noticed that in the configure snap menu my snap values are set to

• Translate: 0
• Rotate: 0
• Scale: 0.000002%

Restoring those values to the defaults fixes the issue (but I never intentionally changed them).