Boolean modifier: Self Intersection fails when mesh object is same for both operand types #93568

New Issue

Roman Shulga · 2021-12-02T13:55:41+01:00

Roman Shulga commented

2021-12-02 13:55:41 +01:00

System Information
Operating system: Win10 (21H1 19043.1348)
Graphics card: GeForce 1080Ti (496.76)

Blender Version
Latest 3.0 (December 02, 02:20:21 - 9cec9b4d6e)

Short description of error
Operand type collection did not consider self intersection with certain condition.
It fails when mesh object is same for both operand types

Exact steps for others to reproduce the error

Open .blend file
Change operand type to Object
Uncheck Self Intersection
Switch back to `Collection

Test File:
boolean.blend
2021-12-03 13-50-41.mp4

**System Information** Operating system: Win10 (21H1 19043.1348) Graphics card: GeForce 1080Ti (496.76) **Blender Version** Latest 3.0 (December 02, 02:20:21 - 9cec9b4d6e33) **Short description of error** Operand type `collection` did not consider `self intersection` with certain condition. It fails when mesh object is same for both operand types **Exact steps for others to reproduce the error** - Open .blend file - Change operand type to `Object` - Uncheck `Self Intersection` - Switch back to `Collection Test File: [boolean.blend](https://archive.blender.org/developer/F12685929/boolean.blend) [2021-12-03 13-50-41.mp4](https://archive.blender.org/developer/F12685686/2021-12-03_13-50-41.mp4)

Roman Shulga commented

2021-12-02 13:55:41 +01:00

Added subscriber: @rainbro

Pratik Borhade commented

2021-12-02 14:07:11 +01:00

Added subscriber: @PratikPB2123

Pratik Borhade commented

2021-12-03 08:23:33 +01:00

Boolean, Exact algorithm, the checkmark "Self Intersections" disappears when object cutter in "Collection"

Hi, thanks for the report. From code side this has been excluded intentionally.

(Looking at the one liner comment, I think self intersection is always available when operand type is Collection)

/* When operand is collection, we always use_self. */
if (RNA_enum_get(ptr, "operand_type") == eBooleanModifierFlag_Object) {
uiItemR(col, ptr, "use_self", 0, nullptr, ICON_NONE);
}
uiItemR(col, ptr, "use_hole_tolerant", 0, nullptr, ICON_NONE);
}```

(see: https://developer.blender.org/diffusion/B/browse/master/source/blender/modifiers/intern/MOD_boolean.cc$601)

> Boolean, Exact algorithm, the checkmark "Self Intersections" disappears when object cutter in "Collection" Hi, thanks for the report. From code side this has been excluded intentionally. (Looking at the one liner comment, I think self intersection is always available when operand type is `Collection`) ``` if (use_exact) { ``` /* When operand is collection, we always use_self. */ if (RNA_enum_get(ptr, "operand_type") == eBooleanModifierFlag_Object) { uiItemR(col, ptr, "use_self", 0, nullptr, ICON_NONE); } uiItemR(col, ptr, "use_hole_tolerant", 0, nullptr, ICON_NONE); }``` ``` (see: https://developer.blender.org/diffusion/B/browse/master/source/blender/modifiers/intern/MOD_boolean.cc$601)

Roman Shulga commented

2021-12-03 11:55:57 +01:00

Yes, I thought so too. At first. And then I selected the object, disabled Self Intersections and selected Collections again. In my file, you can do this in two clicks and see the result, or rather its absence, namely, Self Intersections is not enabled when selecting Collections.

2021-12-03 13-50-41.mp4

Yes, I thought so too. At first. And then I selected the object, disabled Self Intersections and selected Collections again. In my file, you can do this in two clicks and see the result, or rather its absence, namely, Self Intersections is not enabled when selecting Collections. [2021-12-03 13-50-41.mp4](https://archive.blender.org/developer/F12685686/2021-12-03_13-50-41.mp4)

Pratik Borhade commented

2021-12-03 12:16:38 +01:00

Hi, described case (in video) is probably a bug. Will confirm.
Happens only when object is same for both operand types.

(Will search if this has been reported before or not)

Hi, described case (in video) is probably a bug. Will confirm. Happens only when object is same for both operand types. (Will search if this has been reported before or not)

Pratik Borhade changed title from ~~The checkmark "Self Intersections" disappears when object cutter in "Collection"~~ to Boolean modifier: Self Intersection fails when mesh object is same for both operand types

2021-12-03 12:57:52 +01:00

Pratik Borhade commented

2021-12-03 12:58:44 +01:00

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

Philipp Oeser removed the

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Boolean modifier: Self Intersection fails when mesh object is same for both operand types #93568