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Maniphest T72050

Subdivide method "Straight Cut" not working when N-Gons enabled
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Description

System Information
Operating system: Windows-7-6.1.7601-SP1 64 Bits
Graphics card: GeForce GTX 980/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 425.31

Blender Version
Broken: version: 2.81 (sub 16), branch: master, commit date: 2019-11-20 14:27, hash: rB26bd5ebd42e3
Worked: (optional)

Short description of error
Subdivide in Edit mode: Quad Corner Type "Straight Cut" not working if "Create N-Gons" is enabled, falls back to "Inner Vert".

Exact steps for others to reproduce the error

Revisions and Commits

rB Blender
rBdae033801b8c Fix T72050 Subdivide method "Straight Cut" not working with N-Gons enabled

Related Objects

Event Timeline

Karja Krähwald (karja) created this task.Nov 29 2019, 8:33 PM
Germano Cavalcante (mano-wii) lowered the priority of this task from 90 to Low.Dec 2 2019, 6:01 PM
Germano Cavalcante (mano-wii) added a project: Modeling.
Germano Cavalcante (mano-wii) added a subscriber: Germano Cavalcante (mano-wii).

I can confirm.
For some reason this option only works when Create N-Gons is disabled.
I think it should be the other way around since Straight Cut is the only option that creates N-Gons on the subdividided face.

(that behavior was introduced in rB3875461a)

Dalai Felinto (dfelinto) added a project: Tracker Curfew.Dec 23 2019, 1:41 PM
Sybren A. Stüvel (sybren) changed the subtype of this task from "Report" to "Bug".Jan 20 2020, 4:05 PM
Sybren A. Stüvel (sybren) removed a project: Tracker Curfew.
Sybren A. Stüvel (sybren) added a subscriber: Sybren A. Stüvel (sybren).

'Straight Cut' is actually documented as creating N-Gons. However, the 'Create N-Gons' option is documented as:

Quad/Tri Mode: Forces subdivide to create triangles or quads instead of n-gons (see examples below). This mode doesn’t allow the use of Straight Cut on quad corners.

This is probably the source of the bug: the checkbox is documented as the opposite ("force quad/tris" instead of "allow Ngons"), causing confusion.

Sybren A. Stüvel (sybren) renamed this task from Subdivide method "Straight Cut" not working to Subdivide method "Straight Cut" not working when N-Gons enabled.Jan 20 2020, 4:10 PM
Sybren A. Stüvel (sybren) edited projects, added BF Blender (2.82); removed BF Blender.
Germano Cavalcante (mano-wii) raised the priority of this task from Low to Normal.Jan 20 2020, 4:16 PM
Sybren A. Stüvel (sybren) claimed this task.Jan 20 2020, 4:17 PM
Sybren A. Stüvel (sybren) closed this task as Resolved by committing rBdae033801b8c: Fix T72050 Subdivide method "Straight Cut" not working with N-Gons enabled.Jan 20 2020, 4:30 PM
Sybren A. Stüvel (sybren) added a commit: rBdae033801b8c: Fix T72050 Subdivide method "Straight Cut" not working with N-Gons enabled.
Philipp Oeser (lichtwerk) mentioned this in D10702: Fix T86238 : Value of Quad Corner Type changes automatically in the Subdivide operator..Mar 22 2021, 3:55 PM