Bug in Boolean Difference when placing object with snap to vertex tool #71229

New Issue

Matias Bela · 2019-10-30T22:17:15+01:00

Matias Bela commented

2019-10-30 22:17:15 +01:00

System Information
Operating system:Kernel: 4.19.0-5-amd64 x86_64 bits: 64 compiler: gcc v: 6.3.0

Desktop: Xfce 4.12.3 Distro: MX-18.3_x64 Continuum May 26  2019 
base: Debian GNU/Linux 9 (stretch)

Graphics card:
Device-1: Intel Haswell-ULT Integrated Graphics vendor: Lenovo

driver: i915 v: kernel bus ID: 00:02.0 
Display: x11 server: X.Org 1.19.2 driver: modesetting unloaded: fbdev,vesa 
resolution: 1366x768~60Hz 
OpenGL: renderer: Mesa DRI Intel Haswell Mobile v: 4.5 Mesa 18.2.6 
direct render: Yes

Blender Version
Broken: blender-2.81- 14 oct
Worked: (optional)

Short description of error

Boolean Difference not working when using snap to vertex before using the modifier

Exact steps for others to reproduce the error
Add Cube, Add another Cube. Place the second Cube intersecting the previous one using the snap to vertex tool (probably restricting axis is needed to achieve that)

Then add a modifier on the first cube and use the 2nd as difference boolean operation. ERROR:There wont be any visible subtraction on the first cube as expected, only It will cut the mesh leaving all the other vertex edges and faces in the object (view in edit mode)

Add:
(The error Only hapens using standard coordenates 0,0,0 or 1,1,1 .
When the object is placed free not in the matrix, it works ok, but when the objects are beeing placed in the space matrix the error happens)

The error is also in previous blender 2.79

**System Information** Operating system:Kernel: 4.19.0-5-amd64 x86_64 bits: 64 compiler: gcc v: 6.3.0 ``` Desktop: Xfce 4.12.3 Distro: MX-18.3_x64 Continuum May 26 2019 base: Debian GNU/Linux 9 (stretch) ``` Graphics card: Device-1: Intel Haswell-ULT Integrated Graphics vendor: Lenovo ``` driver: i915 v: kernel bus ID: 00:02.0 Display: x11 server: X.Org 1.19.2 driver: modesetting unloaded: fbdev,vesa resolution: 1366x768~60Hz OpenGL: renderer: Mesa DRI Intel Haswell Mobile v: 4.5 Mesa 18.2.6 direct render: Yes ``` **Blender Version** Broken: blender-2.81- 14 oct Worked: (optional) **Short description of error** Boolean Difference not working when using snap to vertex before using the modifier **Exact steps for others to reproduce the error** Add Cube, Add another Cube. Place the second Cube intersecting the previous one using the snap to vertex tool (probably restricting axis is needed to achieve that) Then add a modifier on the first cube and use the 2nd as difference boolean operation. ERROR:There wont be any visible subtraction on the first cube as expected, only It will cut the mesh leaving all the other vertex edges and faces in the object (view in edit mode) Add: (The error Only hapens using standard coordenates 0,0,0 or 1,1,1 . When the object is placed free not in the matrix, it works ok, but when the objects are beeing placed in the space matrix the error happens) The error is also in previous blender 2.79

Matias Bela commented

2019-10-30 22:17:15 +01:00

Added subscriber: @belamat

Dspazio commented

2019-10-31 10:22:22 +01:00

Added subscriber: @Dspazio

Dspazio commented

2019-10-31 10:22:22 +01:00

Boolean modifier in its current state doesn't play nicely with coplanar faces. This is a known issue that is being solved by developers https://developer.blender.org/T47030

I suspect that using snap vertex tool would led you to make coplanar faces rather quickly. If you feel I'm wrong, please attach a blend file with that example you provided since you can snap vertex in more ways.

Boolean modifier in its current state doesn't play nicely with coplanar faces. This is a known issue that is being solved by developers https://developer.blender.org/T47030 I suspect that using snap vertex tool would led you to make coplanar faces rather quickly. If you feel I'm wrong, please attach a blend file with that example you provided since you can snap vertex in more ways.

Philipp Oeser commented

2019-11-01 10:16:25 +01:00

Added subscribers: @howardt, @lichtwerk

Philipp Oeser commented

2019-11-01 10:16:25 +01:00

This is a known thing (probably #54024 (BMesh boolean fails when edge is co-planar to face (under some circumstances))), will merge these reports.
Note that @howardt is currently rewriting booleans to support these cases, so situation will most likely improve soonish...

This is a known thing (probably #54024 (BMesh boolean fails when edge is co-planar to face (under some circumstances))), will merge these reports. Note that @howardt is currently rewriting booleans to support these cases, so situation will most likely improve soonish...

Philipp Oeser commented

2019-11-01 10:16:33 +01:00

Closed as duplicate of #54024

Philipp Oeser closed this issue

2019-11-01 10:16:33 +01:00

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Bug in Boolean Difference when placing object with snap to vertex tool #71229