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UV: Add alpaca_rotate variant for improved packing efficiency #105977

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Chris Blackbourn merged 2 commits from Chris_Blackbourn/blender:uv-alpaca-rotate3 into main 2023-03-28 00:35:38 +02:00
Conversation 1 Commits 2 Files Changed 4 +245 -32
Chris Blackbourn commented 2023-03-22 03:50:41 +01:00
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Chris Blackbourn force-pushed uv-alpaca-rotate3 from 44de660927 to ab7485194d 2023-03-22 07:36:21 +01:00 Compare
Chris Blackbourn requested review from Campbell Barton 2023-03-22 07:37:25 +01:00
Campbell Barton commented 2023-03-27 03:43:18 +02:00
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While this commit looks like a nice improvement, please add a description unless the subject includes all necessary information.

I can assume this rotates islands when the faster alpaca method is used for AABB-packing of smaller islands - which still gain from better alignment. But this kind of statement should be included in the commit message.

While this commit looks like a nice improvement, please add a description unless the subject includes all necessary information. I can assume this rotates islands when the faster alpaca method is used for AABB-packing of smaller islands - which still gain from better alignment. But this kind of statement should be included in the commit message.
Campbell Barton reviewed 2023-03-27 03:43:44 +02:00
source/blender/geometry/intern/uv_pack.cc Outdated
@ -551,6 +552,132 @@ static void pack_island_xatlas(const Span<UVAABBIsland *> island_indices,
*r_max_v = max_v;
}
static void update_hole_rotate(float2 &hole,
Campbell Barton commented 2023-03-27 03:43:44 +02:00
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update_hole_rotate doesn't have a doc-string, a short explanation explaining what it's doing would be good. It's not totally obvious that q and quad_area will never be negative, that could be asserted, it could also be noted that the arguments are ordered. (to ensure unexpected negative values never occur).

`update_hole_rotate` doesn't have a doc-string, a short explanation explaining what it's doing would be good. It's not totally obvious that `q` and `quad_area` will never be negative, that could be asserted, it *could* also be noted that the arguments are ordered. (to ensure unexpected negative values never occur).
Chris_Blackbourn marked this conversation as resolved
Campbell Barton approved these changes 2023-03-27 03:44:55 +02:00
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Approve, with request for a commit message body and some doc-strings.

Approve, with request for a commit message body and some doc-strings.
Chris Blackbourn added 1 commit 2023-03-28 00:24:14 +02:00
Chris Blackbourn merged commit b828641a93 into main 2023-03-28 00:35:38 +02:00
Chris Blackbourn deleted branch uv-alpaca-rotate3 2023-03-28 00:35:39 +02:00
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