Snap vertices with "Closest" is not acting as expected #79556

New Issue

Georges Dahdouh · 2020-08-05T16:31:56+02:00

Georges Dahdouh commented

2020-08-05 16:31:56 +02:00

System Information
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: GeForce GTX 1080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 432.00

Blender Version
Broken: version: 2.83.3, branch: master, commit date: 2020-07-22 06:01, hash: 353e5bd749
Worked: 2.82a at least. Didn't check any 2.83 releases.

Short description of error
Snapping to vertex when moving with "Closest" works as if "Center" is chosen when moving several vertices at once.cubicle.blend

Exact steps for others to reproduce the error

In the attached file, go to edit mode with the selected cubic shape.
3 vertices already selected, try to move them down on Z axis with snap to vertices, "Closest".
The expected behavior is that the vertex at the bottom among the 3 selected vertices, should be at the same position of the vertex I'm snapping to.

#46892 (Snapping closest vertex with Pivot point set to Individual Origins)

**System Information** Operating system: Windows-10-10.0.18362-SP0 64 Bits Graphics card: GeForce GTX 1080/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 432.00 **Blender Version** Broken: version: 2.83.3, branch: master, commit date: 2020-07-22 06:01, hash: `353e5bd749` Worked: 2.82a at least. Didn't check any 2.83 releases. **Short description of error** Snapping to vertex when moving with "Closest" works as if "Center" is chosen when moving several vertices at once.[cubicle.blend](https://archive.blender.org/developer/F8748594/cubicle.blend) **Exact steps for others to reproduce the error** - In the attached file, go to edit mode with the selected cubic shape. - 3 vertices already selected, try to move them down on Z axis with snap to vertices, "Closest". - The expected behavior is that the vertex at the bottom among the 3 selected vertices, should be at the same position of the vertex I'm snapping to. #46892 (Snapping closest vertex with Pivot point set to Individual Origins)

Georges Dahdouh commented

2020-08-05 16:31:56 +02:00

Added subscriber: @GeorgesDahdouh

Georges Dahdouh changed title from ~~Snap vertices with "Closes" is not acting as expected~~ to Snap vertices with "Closest" is not acting as expected

2020-08-05 16:32:33 +02:00

Gilberto Rodrigues commented

2020-08-05 23:25:29 +02:00

Added subscriber: @Gilberto.R

Gilberto Rodrigues commented

2020-08-05 23:25:29 +02:00

Changing the Pivot Point from "individual origins" to any other option makes it behave as expected. Also I can reproduce this issue in 2.90 beta.

Pasang Bomjan commented

2020-08-06 09:51:21 +02:00

Added subscriber: @Pasang

Pasang Bomjan commented

2020-08-06 09:51:21 +02:00

Changed status from 'Needs Triage' to: 'Archived'

Pasang Bomjan closed this issue

2020-08-06 09:51:21 +02:00

Pasang Bomjan self-assigned this 2020-08-06 09:51:21 +02:00

Pasang Bomjan commented

2020-08-06 09:51:21 +02:00

This is not a bug. When you choose the pivot point as "Individual Origin", the transformation acts on individual pieces of elements. Then when you Snap with the 'Closest', the polygon which is closest will be snapped
It has always worked this way. If you're still confused, I can show you the practical cases.

This is not a bug. When you choose the pivot point as "Individual Origin", the transformation acts on individual pieces of elements. Then when you Snap with the 'Closest', the polygon which is closest will be snapped It has always worked this way. If you're still confused, I can show you the practical cases.

Gilberto Rodrigues commented

2020-08-06 22:21:17 +02:00

Added subscriber: @mano-wii

Gilberto Rodrigues commented

2020-08-06 22:21:17 +02:00

No, to me it isn't working as expected. @mano-wii can you please have a look?

Gilberto Rodrigues commented

2020-08-06 22:30:09 +02:00

@Pasang you should let a developer triage this.

Pasang Bomjan commented

2020-08-07 08:44:04 +02:00

Can you show me the video where it worked before? I'd like to see it. 😃

Gilberto Rodrigues commented

2020-08-07 22:32:14 +02:00

Seems like it's broken since 2.79. This behavior is not documented. Documentation says it snaps the closest vertex, it doesn't say "it snaps the closest object center instead depending on pivot point"... If this was to be a feature, it would be added as a snapping option, not a pivot point dependent thing. So please reopen the task @Pasang let the developer have his opinion if this is really a bug or something that needs documentation.

Pasang Bomjan commented

2020-08-07 22:44:24 +02:00

Now the task is closed already, only a developer can reopen it. If you think I may have made a mistake then you can create a new task showing how it used to work. :)

Pasang Bomjan was unassigned by Ankit Meel

2020-08-07 23:13:03 +02:00

Ankit Meel commented

2020-08-07 23:13:03 +02:00

Changed status from 'Archived' to: 'Confirmed'

Ankit Meel reopened this issue

2020-08-07 23:13:03 +02:00

Germano Cavalcante commented

2020-08-08 01:37:33 +02:00

The target is calculated based on the center of the elements involved.
With the Individual Origin option enabled, the center of the transformed elements is the center of the island to which it belongs.
It has always worked that way, but maybe it is time to change that behavior.
I will analyze it a little more to see if there is any disadvantage in changing this behavior.

The target is calculated based on the center of the elements involved. With the `Individual Origin` option enabled, the center of the transformed elements is the center of the island to which it belongs. It has always worked that way, but maybe it is time to change that behavior. I will analyze it a little more to see if there is any disadvantage in changing this behavior.

Germano Cavalcante self-assigned this 2020-08-08 01:37:44 +02:00

Pasang Bomjan commented

2020-08-08 09:12:45 +02:00

I will analyze it a little more to see if there is any disadvantage in changing this behavior.

Here's the use case.
20200808_124736.mp4

> I will analyze it a little more to see if there is any disadvantage in changing this behavior. Here's the use case. [20200808_124736.mp4](https://archive.blender.org/developer/F8758174/20200808_124736.mp4)

Gilberto Rodrigues commented

2020-08-08 22:42:38 +02:00

@Pasang , for consistency sake of course. Changing the number of selected islands or changing the pivot point shouldn't alter the snapping option behavior. Snapping with "Closest" has a defined meaning, which is snapping the closest vertex, not "the closest island's center sometimes". The way it is, with the snapping being different depending on pivot point, makes users very stressed and confused, it feels like snap is broken. If snapping closest island center behavior is to be a feature, it should be a snapping option, not a pivot point dependent thing. Having the user's suffer until they learn behavior exceptions in features is not good design. Features should be consistent and intuitive. Behavior inconsistencies will only make people more reliant on the manual or come bug report. To me snap with closest should always mean snapping with closest vertex and something else should be something else.

Pasang Bomjan commented

2020-08-09 10:04:30 +02:00

@Gilberto.R, sorry for being a jerk earlier 😀.
I agree that there should be more options like closest edge, closest face, closest island and that the closest point should snap the closest vert no matter the pivot point.

@Gilberto.R, sorry for being a jerk earlier 😀. I agree that there should be more options like **closest edge, closest face, closest island** and that the **closest point** should snap the closest vert no matter the pivot point.

Georg K commented

2021-01-31 00:10:55 +01:00

Added subscriber: @georgK

Gilberto Rodrigues commented

2021-03-30 17:59:27 +02:00

@mano-wii Though it doesn't work in 2.79, I just found that this worked fine in much earlier versions.
Open blender 2.49b.
Tab to edit mode.
Duplicate cube and move it
Turn on Snapping
Change pivot point to "Individual Centers"
Snapping will still snap with closest. So no Bug there. The bug is that in current versions when you change the pivot to "Individual Origins", snap uses the nearest island center for snapping instead of using the closest point.

also no bug on version 2.59.

@mano-wii Though it doesn't work in 2.79, I just found that this worked fine in much earlier versions. Open blender 2.49b. Tab to edit mode. Duplicate cube and move it Turn on Snapping Change pivot point to "Individual Centers" Snapping will still snap with closest. So no Bug there. The bug is that in current versions when you change the pivot to "Individual Origins", snap uses the nearest island center for snapping instead of using the closest point. also no bug on version 2.59.

Germano Cavalcante commented

2021-03-30 21:38:18 +02:00

@Gilberto.R, thank you for the info, but we still need to look for the reason that these changes were made.
I feel like changing this now is a long shot.

@Gilberto.R, thank you for the info, but we still need to look for the reason that these changes were made. I feel like changing this now is a long shot.

Samuel Gariépy commented

2022-03-16 16:41:07 +01:00

Added subscriber: @sgariepy.3d

Philipp Oeser removed the

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Snap vertices with "Closest" is not acting as expected #79556