Expand Mask: Inverted fill on mesh islands #104022
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Reference: blender/blender#104022
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(NOTE) This task is part of the community & sub tasks of the workboard. Anyone is free to pick up this task and contribute. For any questions or needed reviewers, please tag @JosephEagar and @JulienKaspar.
When using the operator "Expand Mask by Topology" via
Shift Ayou can fill the entire connected mesh island by moving the cursor outside of the bounds of the object.The mesh island is always filled with a mask value of 1.
The issue is that when using the modal shortcut
Fto invert the effect, it doesn't do anything yet.This task is about changing the behavior to fill the mesh island with a mask value of 0 if the operation is inverted.
Changed status from 'Needs Triage' to: 'Confirmed'
Added subscribers: @JulienKaspar, @JosephEagar
Added subscriber: @Pratyaksh-Raj
Hello , I want to work on this issue .
by using "Invert Mask" operator, which is accessed through the Shift-Ctrl-I shortcut which change mask value from 1 - 0 and vice versa and it can also be done by manually .
so @JosephEagar will you please guide me here what I need to do?
@Pratyaksh-Raj Inverting the mask has a very different effect, because it inverts the currently existing mask.
When inverting the Expand Mask operator the purpose is to set a mask value of 0 on the expanded area.
Is this issue fixed? @JulienKaspar cause when I tried doing the
shift+Aand then pressingFit does erase the selectionhey, so I'm trying to fix this bug, and I have a couple of doubts:
1. what is a mesh island? I googled it, and I came across the mesh island node documentation, and over there it says that mesh islands are separate connected regions of a mesh. Can anyone expand on that?
2. While trying to reproduce this issue, I am using the Expand Mask by Topology operator and inverting by pressing F, it does get inverted? Does it have to do with the cursor being out of bounds while I invert it?
mesh before applying any masks:
applying the Expand Mask by Topology operator while staying inside the bounds of the object:
inverting the operator by pressing F:
this is what is seen by going out of bounds regardless of whether the mask is inverted or not:
as @nainilnandu mentioned, is this issue fixed? @JulienKaspar
if not, the issue seems to be a bit unclear to me. It would be kind of you to expand (no pun intended) on this a bit more, so that I could understand the issue better. Thank you!
@nainilnandu @Piyush-Aniruddha-Udhao FYI I'm unavailable for the month of March. Reach out to @JosephEagar for info and help 👍
About the questions:
You're right. A mesh island is all geometry that is connected to each other.
Your example images seem to be wrong. Please make sure to use the latest version of Blender main and factory preferences.
The default expansion should be a mask value 1 (dark). If inverted with
F, the expansion will be a mask value of 0 (light), which is essentially like subtracting a mask.When starting an expansion and moving the cursor outside of the surface of the object, the mesh island will be filled with a mask value 1.
If the expansion is inverted with
F, it should fill the mesh island with a mask value of 0,but the issue is that it will fail to do anything.
Okay, I will update blender and try and replicate this issue! Thanks for the clarification.