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Triangulate faces with 'Beauty method' produces extra small triangles in certain cases
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Description

System Information
Operating system: Windows-10-10.0.18362-SP0 64 Bits
Graphics card: GeForce RTX 2080 Ti/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 451.48

Blender Version
Broken: version: 2.90.0 Alpha, branch: master, commit date: 2020-07-19 21:23, hash: rB78e40ad21f5b
Worked: N/A

Short description of error
On circular geometry Triangulate sometimes pick worse edge than expected

Exact steps for others to reproduce the error

  1. Open attached blend file
  2. Select middle circle as shown on image.
  3. Click Triangulate faces with quad method set to 'Beauty' by default


triangulation_problem2.blend781 KBDownload

Revisions and Commits

rB Blender
rBf2b71df549b5 Fix T79482: Triangulate quads with 'Beauty' can make zero area faces
rB3f94f47113f9 Fix T79482: Triangulate quads with 'Beauty' can make zero area faces

Related Objects

Event Timeline

Andrii Mykhailov (zelfit) renamed this task from Triangulate faces with produces extra small triangles in certain cases to Triangulate faces with 'Beauty method produces extra small triangles in certain cases.Aug 3 2020, 11:05 AM
Andrii Mykhailov (zelfit) created this task.
Andrii Mykhailov (zelfit) renamed this task from Triangulate faces with 'Beauty method produces extra small triangles in certain cases to Triangulate faces with 'Beauty method' produces extra small triangles in certain cases.Aug 3 2020, 11:07 AM
Andrii Mykhailov (zelfit) updated the task description. (Show Details)
Marcin Twarowski (Tvaroog) added a subscriber: Marcin Twarowski (Tvaroog).Aug 3 2020, 11:22 AM

Inner circle in the mesh from the file you provided is already all triangles.

Andrii Mykhailov (zelfit) updated the task description. (Show Details)Aug 3 2020, 11:23 AM

Updated file. Should be fine now.

Campbell Barton (campbellbarton) closed this task as Resolved by committing rB3f94f47113f9: Fix T79482: Triangulate quads with 'Beauty' can make zero area faces.Aug 3 2020, 1:14 PM
Campbell Barton (campbellbarton) claimed this task.
Campbell Barton (campbellbarton) added a commit: rB3f94f47113f9: Fix T79482: Triangulate quads with 'Beauty' can make zero area faces.
Jeroen Bakker (jbakker) mentioned this in T77348: Blender LTS: Maintenance Task.Aug 12 2020, 8:18 AM
Jeroen Bakker (jbakker) added a commit: rBf2b71df549b5: Fix T79482: Triangulate quads with 'Beauty' can make zero area faces.Aug 12 2020, 9:46 AM
Falk David (filedescriptor) mentioned this in T85402: Triangulate faces with Beauty method produces incorrect geometry .Feb 5 2021, 3:16 PM