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Mesh: Move edge UV seams to a generic attribute #104728

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Hans Goudey merged 11 commits from HooglyBoogly/blender:refactor-mesh-uv-seam-generic into main 2023-03-01 14:13:15 +01:00
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Hans Goudey commented 2023-02-14 05:22:10 +01:00
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As part of #95966, move the ME_SEAM flag on mesh edges
to a generic boolean attribute, called .uv_seam. This is the
last bit of extra information stored in mesh edges. After this
is committed we can switch to a different type for them and
have a 1/3 improvement in memory consumption.

It is also now possible to see that a mesh has no UV seams in
constant time, and like other similar refactors, interacting with
only the UV seams can be done with less memory.

The attribute name starts with a . to signify that the attribute,
like face sets, isn't meant to be used in arbitrary procedural
situations (with geometry nodes for example). That gives us more
freedom to change things in the future.

As part of #95966, move the `ME_SEAM` flag on mesh edges to a generic boolean attribute, called `.uv_seam`. This is the last bit of extra information stored in mesh edges. After this is committed we can switch to a different type for them and have a 1/3 improvement in memory consumption. It is also now possible to see that a mesh has no UV seams in constant time, and like other similar refactors, interacting with only the UV seams can be done with less memory. The attribute name starts with a `.` to signify that the attribute, like face sets, isn't meant to be used in arbitrary procedural situations (with geometry nodes for example). That gives us more freedom to change things in the future.
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Hans Goudey added 4 commits 2023-02-14 05:22:13 +01:00 
As part of #95966, move the `ME_SEAM` flag on mesh edges
to a generic boolean attribute, called `.uv_seam`. This is the
last bit of extra information stored in mesh edges. After this
is committed we can switch to a different type for them and
have a 1/3 improvement in memory consumption.
Fix Mesh to BMesh conversion
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buildbot/vexp-code-patch-coordinator Build done.
Details
0a2c8104a1 
The BMesh edge flag needs to be explicitly zeroed
Hans Goudey commented 2023-02-14 05:22:54 +01:00
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Brecht Van Lommel added this to the Modeling project 2023-02-15 09:51:15 +01:00
Hans Goudey added 1 commit 2023-02-23 01:35:24 +01:00
Hans Goudey added 1 commit 2023-02-23 17:36:35 +01:00
Hans Goudey added 1 commit 2023-02-23 19:25:34 +01:00
Hans Goudey added 1 commit 2023-02-27 21:39:38 +01:00
Hans Goudey added 1 commit 2023-02-28 19:10:43 +01:00
Hans Goudey added this to the 3.6 LTS milestone 2023-02-28 19:35:13 +01:00
Hans Goudey added 1 commit 2023-02-28 23:48:54 +01:00
Campbell Barton approved these changes 2023-03-01 04:55:48 +01:00
Hans Goudey added 1 commit 2023-03-01 14:12:39 +01:00
Hans Goudey merged commit cccf91ff83 into main 2023-03-01 14:13:15 +01:00
Hans Goudey deleted branch refactor-mesh-uv-seam-generic 2023-03-01 14:13:16 +01:00
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Reference: blender/blender#104728
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