"Cursor Extrude Vertex" causes source vertex to snap #89647

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Will · 2021-07-04T20:35:31+02:00

Will commented

2021-07-04 20:35:31 +02:00

System Information
Operating system: Tux-Based
Graphics card: Intel

Blender Version
Broken: 2.93

Short description of error

The [CTRL}+[RMB] extrude operator (ops.mesh.dupli_extrude_cursor()) causes the source vertex to be snapped, in addition to the newly created vertex:

(GIF.)

Exact steps for others to reproduce the error
Select a vertex, and do [CTRL}+[RMB] in a situation where there is a valid snap position for it. (I used Surface snap with a surface behind it.)

Test File:
#89647.blend

**System Information** Operating system: Tux-Based Graphics card: Intel **Blender Version** Broken: 2.93 **Short description of error** The [CTRL}+[RMB] extrude operator (`ops.mesh.dupli_extrude_cursor()`) causes the source vertex to be snapped, in addition to the newly created vertex: ![WrongSnap.gif](https://archive.blender.org/developer/F10211265/WrongSnap.gif) (GIF.) **Exact steps for others to reproduce the error** Select a vertex, and do [CTRL}+[RMB] in a situation where there is a valid snap position for it. (I used Surface snap with a surface behind it.) Test File: [#89647.blend](https://archive.blender.org/developer/F10211552/T89647.blend)

Will commented

2021-07-04 20:35:31 +02:00

Added subscriber: @WCN

Pratik Borhade commented

2021-07-05 04:55:46 +02:00

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

Pratik Borhade commented

2021-07-05 04:55:55 +02:00

Added subscriber: @PratikPB2123

Germano Cavalcante commented

2021-07-05 15:10:34 +02:00

Added subscriber: @mano-wii

Germano Cavalcante commented

2021-07-05 15:10:34 +02:00

Changed status from 'Confirmed' to: 'Needs Developer To Reproduce'

Germano Cavalcante commented

2021-07-05 15:10:34 +02:00

Apparently it's intentional:
https://developer.blender.org/diffusion/B/browse/master/source/blender/editors/mesh/editmesh_extrude.c$870

/* also project the source, for retopo workflow */

But I don't see a problem with changing behavior if it's really desirable.
I suppose this is something for the #sculpt_paint_texture team to decide.

Apparently it's intentional: https://developer.blender.org/diffusion/B/browse/master/source/blender/editors/mesh/editmesh_extrude.c$870 > /* also project the source, for retopo workflow */ --- But I don't see a problem with changing behavior if it's really desirable. I suppose this is something for the #sculpt_paint_texture team to decide.

Will commented

2021-07-05 15:17:28 +02:00

That's odd.

I'll note that it's inconsistent with how the other Extrude tools all seem to work, and I haven't heard of anyone having any problem using those for retopo.

Personally, if I want to project the source, I'll just do so separately with a quick zero-length grab (- [x], then immediately [Enter] or [LMB]). IMO needing such a common and fast explicit operation to reproject probably wastes less time than having to disable snapping to avoid reprojection.

That's odd. I'll note that it's inconsistent with how the other Extrude tools all seem to work, and I haven't heard of anyone having any problem using those for retopo. Personally, if I want to project the source, I'll just do so separately with a quick zero-length grab (`- [x]`, then immediately `[Enter]` or `[LMB]`). IMO needing such a common and fast explicit operation to reproject probably wastes less time than having to disable snapping to avoid reprojection.

Will commented

2021-07-10 04:17:07 +02:00

The current behaviour also projects even if the source vertex isn't even on the screen/view frustum, which naturally leads to some rather unpredictable behaviour.

Philipp Oeser removed the

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"Cursor Extrude Vertex" causes source vertex to snap #89647