Snapping to vertex for Rotation doesnt work for Empty and Pivot Point #99279

New Issue

Alexander · 2022-06-29T21:18:53+02:00

Alexander commented

2022-06-29 21:18:53 +02:00

Blender Version
Broken: 2.92, 3.1.2
Worked: -

Short description of error
Snapping with Rotation enabled doesnt work for Empty and Pivot Point (In Affect Only Origin mode)
In attached file,
cube was properly aligned during rotation with snapping to vertex on the plane (marked)
but rotation of Empty produce unexpected results

Exact steps for others to reproduce the error
Place any type of Emply object or try to edit Pivot Point and rotate it with snapping to certain object vertex to match rotation. Rotation will always produce unexpected results.

Video demonstration: https://www.youtube.com/watch?v=zB9ElkiEG7U

snapping_issue_T99279.blend

**Blender Version** Broken: 2.92, 3.1.2 Worked: - **Short description of error** Snapping with Rotation enabled doesnt work for Empty and Pivot Point (In Affect Only Origin mode) In attached file, cube was properly aligned during rotation with snapping to vertex on the plane (marked) but rotation of Empty produce unexpected results **Exact steps for others to reproduce the error** Place any type of Emply object or try to edit Pivot Point and rotate it with snapping to certain object vertex to match rotation. Rotation will always produce unexpected results. Video demonstration: https://www.youtube.com/watch?v=zB9ElkiEG7U [snapping_issue_T99279.blend](https://archive.blender.org/developer/F13241695/snapping_issue_T99279.blend)

Alexander commented

2022-06-29 21:18:53 +02:00

Added subscriber: @Alexander-35

Pratik Borhade commented

2022-06-30 07:37:27 +02:00

Added subscriber: @PratikPB2123

Pratik Borhade commented

2022-06-30 07:37:27 +02:00

Changed status from 'Needs Triage' to: 'Needs User Info'

Pratik Borhade commented

2022-06-30 07:37:27 +02:00

Thanks for the report. I'm not able to repro this. Can you upload your .blend?

Alexander commented

2022-06-30 10:32:14 +02:00

In #99279#1382700, @PratikPB2123 wrote:
Thanks for the report. I'm not able to repro this. Can you upload your .blend?

Sure. I also i record a video showing that issue with snapping.
https://www.youtube.com/watch?v=zB9ElkiEG7U{F13241689}

snapping_issue_T99279.blend

And just for clarify: snapping for rotation of objects works as expected. Issue only happening in case of Pivot Point editing and Empty's. Its creating troubles because:

Ability to snap Pivot Point with rotation can help easilly and fast orient pivot point as you needed. The job can be done with addons, but it will require more time. And those issue are anyway looks like bug.
Ability to snap Empty to desired orientation are crucial because currently we dont have proper Groups in blender. Groups are kind of replaced by "parenting to empty" and Empty are basically becomes to Group Pivot Point. So ability to orient Empty (Group Pivot Point) are become important thing.

> In #99279#1382700, @PratikPB2123 wrote: > Thanks for the report. I'm not able to repro this. Can you upload your .blend? Sure. I also i record a video showing that issue with snapping. https://www.youtube.com/watch?v=zB9ElkiEG7U{F13241689} [snapping_issue_T99279.blend](https://archive.blender.org/developer/F13241695/snapping_issue_T99279.blend) And just for clarify: snapping for rotation of objects works as expected. Issue only happening in case of Pivot Point editing and Empty's. Its creating troubles because: 1. Ability to snap Pivot Point with rotation can help easilly and fast orient pivot point as you needed. The job can be done with addons, but it will require more time. And those issue are anyway looks like bug. 2. Ability to snap Empty to desired orientation are crucial because currently we dont have proper Groups in blender. Groups are kind of replaced by "parenting to empty" and Empty are basically becomes to Group Pivot Point. So ability to orient Empty (Group Pivot Point) are become important thing.

Pratik Borhade commented

2022-07-06 13:05:11 +02:00

Changed status from 'Needs User Info' to: 'Confirmed'

Pratik Borhade commented

2022-07-06 13:05:11 +02:00

Added subscriber: @mano-wii

Germano Cavalcante commented

2022-07-06 17:23:04 +02:00

The snapping in the Rotation op works by trying to align 3 points:

Rotation pivot
Point calculated as snap origin (the Snap With)
Snap Point

In the case of the Cube, the Snap With is the BoundBox point of the Cube Closest to the snap point. In this case, the vertex in the low corner with the highest X value

In the case of Empty, the Snap With and the Rotation Pivot are in the same position. This makes alignment impossible.

I don't know how to solve this without a solution that involves choosing a Custom "Snap With" (D9415: Transform: add feature to edit the 'Snap Base')

The snapping in the Rotation op works by trying to align 3 points: - Rotation pivot - Point calculated as snap origin (the `Snap With`) - Snap Point In the case of the Cube, the `Snap With` is the BoundBox point of the Cube `Closest` to the snap point. In this case, the vertex in the low corner with the highest X value In the case of Empty, the `Snap With` and the `Rotation Pivot` are in the same position. This makes alignment impossible. I don't know how to solve this without a solution that involves choosing a Custom "Snap With" ([D9415: Transform: add feature to edit the 'Snap Base'](https://archive.blender.org/developer/D9415))

Philipp Oeser removed the

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Snapping to vertex for Rotation doesnt work for Empty and Pivot Point #99279