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Cleanup: BLI: Parallel Transform #114373

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Iliya Katushenock wants to merge 2 commits from mod_moder:parallel_transform into main
pull from: mod_moder:parallel_transform
merge into: blender:main

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Conversation 2 Commits 2 Files Changed 15 +60 -97
Iliya Katushenock commented 2023-11-01 19:50:11 +01:00
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Parallel transform is the new function. Analog of std transform with parallelism.
This will simplify common loops over all values.

Parallel transform is the new function. Analog of std transform with parallelism. This will simplify common loops over all values.
Iliya Katushenock added 1 commit 2023-11-01 19:50:23 +01:00
Iliya Katushenock requested review from Hans Goudey 2023-11-01 19:58:13 +01:00
Hans Goudey requested review from Jacques Lucke 2023-11-01 20:05:10 +01:00
Iliya Katushenock added 1 commit 2023-11-01 20:19:30 +01:00
buildbot/vexp-code-patch-coordinator Build done. Details
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Hans Goudey requested changes 2023-11-01 20:27:40 +01:00
source/blender/geometry/intern/realize_instances.cc
@ -290,3 +289,1 @@
dst[i] = math::transform_point(transform, src[i]);
}
});
array_utils::copy(src, dst);
Hans Goudey commented 2023-11-01 20:25:50 +01:00
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I don't think this change is for the better. Copying and transforming should be the same hot loop.

Same with anywhere else a transform and copy is split in this PR.

I don't think this change is for the better. Copying and transforming should be the same hot loop. Same with anywhere else a transform and copy is split in this PR.
source/blender/nodes/geometry/nodes/node_geo_transform_geometry.cc
@ -124,6 +119,7 @@ static void transform_greasepencil(GreasePencil &grease_pencil, const float4x4 &
static void translate_instances(bke::Instances &instances, const float3 translation)
{
MutableSpan<float4x4> transforms = instances.transforms();
Hans Goudey commented 2023-11-01 20:27:36 +01:00
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Unrelated formatting change

Unrelated formatting change
Hans Goudey commented 2023-11-01 20:27:51 +01:00
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@blender-bot build

@blender-bot build
Jacques Lucke reviewed 2023-11-02 13:20:48 +01:00
Jacques Lucke left a comment
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Generally seems ok, my main concerns are:

  • The hot loop is less visible.
  • Manually optimizing the hot loop is less possible.
  • This encourages making hot loops smaller than they should be (e.g. the change in stl_import_mesh.cc).
  • Might result in more copying because data is not explicitly changed inplace.
Generally seems ok, my main concerns are: * The hot loop is less visible. * Manually optimizing the hot loop is less possible. * This encourages making hot loops smaller than they should be (e.g. the change in `stl_import_mesh.cc`). * Might result in more copying because data is not explicitly changed inplace.
Hans Goudey commented 2023-11-02 13:41:33 +01:00
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Given those points and how this change ended up with extra copying loops, I'd suggest to skip this for now.

Given those points and how this change ended up with extra copying loops, I'd suggest to skip this for now.
Iliya Katushenock added this to the Core Libraries project 2023-12-01 15:04:45 +01:00
Iliya Katushenock deleted branch parallel_transform 2024-04-07 16:28:45 +02:00
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Reference: blender/blender#114373
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