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feat(ugc): make models like LU Toolbox does, within CPU and memory budgets

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Parity with LU Toolbox's Process Model, Bake Lighting and icon renderer, with
its defaults as the settings' defaults:

- Colors from its LU palette (UgcPalette: LU colors, LDD colors mapped to the
  nearest LU one, unknown ones black), transparent bricks at 58.82% opacity, a
  brick transparent only when all of its materials are.
- Color variation: each brick's material gets its HSV value shifted in a 2.224
  gamma by up to 5% (times the color's own amount), from a random number of
  the model, brick and material, so reprocessing gives the same colors in
  every LOD. Icons get none, and the icon renderer's color corrections.
- LODs 0 and 2 with its distance logic, written as NiLODNode/NiRangeLODData
  like its exports and the game's own brick models, shapes divided at 65535
  vertices along the longest side like divide_mesh.
- Ambient occlusion like its AO-only bake: 64 rays per vertex, distance 5,
  after hidden surface removal, transparent bricks neither baked nor
  occluding, glow colors added.
- Icons from its icon scene: 50 mm lens at 53.4/19.5 degrees, sun of 2.5 at
  21/50.3 degrees with soft shadows, grey world light with occlusion; LOD 0's
  hidden surface removal and occlusion are reused for them.
- Optional ground plane for hidden surface removal; stats.json per model and
  the previous version's previews kept for comparing.

Budgets, applied live on config reload: max_cpu_percent (workers account
their thread CPU time and sleep to stay under it, long renders included),
worker_nice, max_memory_mb (jobs are estimated from their brick count and
wait until they fit), max_model_bricks and pause_hours. /status and the
traffic report show CPU, memory and throttling.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Aaron Kimbrell
2026-09-27 09:19:59 -05:00
parent c8ad83b4f0
commit c27735cbb3
21 changed files with 1875 additions and 232 deletions
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13
dUgcServer/UgcStorage.cpp
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@@ -10,8 +10,13 @@ namespace {
"model.nif", "model.nif.gz", "model.nif.checksum",
"model.lxfml.gz", "model.lxfml.checksum",
"icon.dds.gz", "icon.dds.checksum", "icon.png",
"model.noao.nif", "stats.json",
"previous.icon.png", "previous.model.nif", "previous.model.noao.nif", "previous.stats.json",
};
// What of the files made before is kept when an item is made again, for comparing (as previous.<name>)
constexpr std::array KEPT_FILES = { "icon.png", "model.nif", "model.noao.nif", "stats.json" };
const char* KindFolder(UgcStorage::Kind kind) {
return kind == UgcStorage::Kind::MODEL ? "models" : "modular";
}
@@ -61,6 +66,14 @@ std::optional<uint64_t> UgcStorage::Write(Kind kind, LWOOBJID id, const Files& f
}
bytes += data.size();
}
// Keep the last version's previews to compare with
for (const auto* name : KEPT_FILES) {
if (files.contains(name)) {
std::filesystem::copy_file(folder / name, temporary / (std::string("previous.") + name), std::filesystem::copy_options::overwrite_existing, code);
if (!code) bytes += std::filesystem::file_size(temporary / (std::string("previous.") + name), code);
code.clear();
}
}
// Swap the old folder out and the new one in; the old one is deleted after
const auto old = folder.parent_path() / (".old-" + folder.filename().string() + "-" + RandomSuffix());
const bool hadOld = std::filesystem::exists(folder, code);