Exact boolean diff does not work for particular case #90109

New Issue

Liviu Grigorescu · 2021-07-24T23:44:44+02:00

Liviu Grigorescu commented

2021-07-24 23:44:44 +02:00

System Information
Operating system: Linux-5.4.0-77-generic-x86_64-with-glibc2.27 64 Bits
Graphics card: GeForce GTX 850M/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 460.80

Blender Version
Broken: version: 2.93.0, branch: master, commit date: 2021-06-02 11:21, hash: 84da05a8b8
Worked: (newest version of Blender that worked as expected)

Short description of error
Boolean difference is not working for one particular case when using Exact solver.

Exact steps for others to reproduce the error

Load the attached blender file.
Select Obj1. You should see something like
Go to modifiers and check Fast solver. Now it starts working

I tried selecting Self and Hole tolerant options and it does not work.
I also checked with other objects (ie. cilinders, ...) and the boolean operation is correctly applied with Exact solver. It seems the issue can be reproduced only when I try to diff Obj2.

issue_boolean_exact.blend

**System Information** Operating system: Linux-5.4.0-77-generic-x86_64-with-glibc2.27 64 Bits Graphics card: GeForce GTX 850M/PCIe/SSE2 NVIDIA Corporation 4.5.0 NVIDIA 460.80 **Blender Version** Broken: version: 2.93.0, branch: master, commit date: 2021-06-02 11:21, hash: `84da05a8b8` Worked: (newest version of Blender that worked as expected) **Short description of error** Boolean difference is not working for one particular case when using `Exact` solver. **Exact steps for others to reproduce the error** * Load the attached blender file. * Select `Obj1`. You should see something like ![image.png](https://archive.blender.org/developer/F10236296/image.png) * Go to modifiers and check `Fast` solver. Now it starts working ![image.png](https://archive.blender.org/developer/F10236291/image.png) I tried selecting `Self` and `Hole tolerant` options and it does not work. I also checked with other objects (ie. cilinders, ...) and the boolean operation is correctly applied with `Exact` solver. It seems the issue can be reproduced only when I try to diff `Obj2`. [issue_boolean_exact.blend](https://archive.blender.org/developer/F10236279/issue_boolean_exact.blend)

Liviu Grigorescu commented

2021-07-24 23:44:44 +02:00

Added subscriber: @Liviu-Grigorescu

Liviu Grigorescu commented

2021-07-25 00:08:13 +02:00

I attached a new file where I simplified Obj2 by dissolving unnecessary edges. Problem still persists.issue_boolean_exact_simplified.blend

I attached a new file where I simplified `Obj2` by dissolving unnecessary edges. Problem still persists.[issue_boolean_exact_simplified.blend](https://archive.blender.org/developer/F10236320/issue_boolean_exact_simplified.blend)

Erik Abrahamsson commented

2021-07-25 11:42:38 +02:00

Added subscriber: @erik85

Erik Abrahamsson commented

2021-07-25 11:42:38 +02:00

Hi, if you recalculate the normals on your cutting object it works fine. (edit mode ctrl-shift-N)

Howard Trickey commented

2021-07-25 19:57:48 +02:00

Added subscriber: @howardt

Howard Trickey commented

2021-07-25 19:57:48 +02:00

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

Howard Trickey closed this issue

2021-07-25 19:57:48 +02:00

Howard Trickey self-assigned this 2021-07-25 19:57:48 +02:00

Howard Trickey commented

2021-07-25 19:57:48 +02:00

This was fixed by commit 0aad8100ae You still have to use the Self option to make it work in Exact mode.

This was fixed by commit 0aad8100ae5cfb You still have to use the Self option to make it work in Exact mode.

Liviu Grigorescu commented

2021-07-26 10:47:53 +02:00

Thank you @howardt for the quick resolution.
Until the new commit gets into next build I'll use the normals recalculation suggested by @erik85.

Thank you @howardt for the quick resolution. Until the new commit gets into next build I'll use the normals recalculation suggested by @erik85.

Liviu Grigorescu commented

2021-07-29 22:54:11 +02:00

Can I find this commit in daily build Blender 2.93.2 - Candidate so I can give it a try?

Can I find this commit in [daily build ](https://builder.blender.org/download/daily/) Blender 2.93.2 - Candidate so I can give it a try?

Howard Trickey commented

2021-07-30 01:10:49 +02:00

I did not back port this fix to 2.93.2. Not clear whether I should or not. It will be in the master daily build however.

Liviu Grigorescu commented

2021-08-01 22:48:03 +02:00

No need to back port. I switched to 3.0 and it works fine.

Sign in to join this conversation.

No Label

Download

What's New

Blender Studio

Manual

Developers Blog

Documentation

Benchmark

Blender Conference

Development Fund

One-time Donations

Exact boolean diff does not work for particular case #90109