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Maniphest T51818

Archipack: Nested boolean does mess normals of PARENT of hole object
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Description

System Information
Win 10

Blender Version
Broken: 2.77a - 2.77 last build bot
Worked: (optional)

Short description of error
Nested boolean does mess normals of PARENT of hole object !

Exact steps for others to reproduce the error

Setup achipack from https://github.com/s-leger/archipack/tree/boolean_mess

In T panel under Create, Use draw a wall click, drag and release to create a wall, then use draw doors/windows to slap object on the wall.

Select the wall, and in T + tools panel click on autoboolean.
Look at window frame.

boolean_mess.blend155 KBDownload

Details

Type
Bug

Event Timeline

Bastien Montagne (mont29) renamed this task from Nested boolean does mess normals of PARENT of hole object to Archipack: Nested boolean does mess normals of PARENT of hole object.Jun 16 2017, 4:27 PM
Bastien Montagne (mont29) edited projects, added Addons; removed BF Blender.
Campbell Barton (campbellbarton) added a subscriber: Campbell Barton (campbellbarton).Jun 16 2017, 5:49 PM

Since this is report in modifier, think its reasonable report narrows the problem down to test file that doesn't depend on 3rd party add-ons.

Campbell Barton (campbellbarton) triaged this task as Incomplete priority.Jun 16 2017, 5:55 PM
stephen leger (stephen_leger) added a comment.Jun 16 2017, 9:23 PM

Well, narrowed down a bit.

Mesh was created via bmesh, setting vertex, faces, material index, and uvs.
Setup boolean structure and parenting as you may find in file.

  • AutoBoolean does barely nothing, only update to same values allready set hide_select, hide_render, lock all transforms and cycles visibility related params.
  • Parent-child relationship, boolean modifiers and modifier.objects untouched.

Seem this is enougth to trigger (mess) update of normals in parent objects of holes.

Workaround :

  • call bm.update_normals() at mesh creation time.

using auto_smooth only hide the bug, but uncheck does show black objects.

Bastien Montagne (mont29) raised the priority of this task from Incomplete to Normal.Jun 28 2017, 10:35 AM