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fix(ugc): write NIFs the way the game's own brick models are

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Compared block by block with res/BrickModels/ndmade (and nif.xml for
20.3.0.9, LU's version, user version 0): every shape now has the same four
properties in the same order (material with glossiness 4, alpha blending by
the vertex alpha, specular off, vertex colors as ambient and diffuse), nodes
have flags 0x110 and shapes 0x10. A generated NIF put in place of a game
model and spawned in the 1.10.64 client renders with its colors.

Readers treat a blended shape as transparent only where it is see-through
(material or vertex alpha below 1), for the icons and the 3D view.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Aaron Kimbrell
2026-09-27 14:40:46 -05:00
parent 30da6575e3
commit c4d2454e63
4 changed files with 35 additions and 19 deletions
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5
dUgcServer/UgcModel.cpp
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@@ -313,7 +313,10 @@ namespace UgcModel {
normal = length > 0.0f ? normal / length : glm::vec3(0.0f, 1.0f, 0.0f);
}
}
(source.material.alphaBlend ? model.transparent : model.opaque).Append(mesh);
// Blending only shows where something is see-through (the game's brick models blend every shape)
bool seeThrough = source.material.alphaBlend && source.material.alpha < 0.99f;
for (size_t v = 0; source.material.alphaBlend && !seeThrough && v < mesh.colors.size(); v++) seeThrough = mesh.colors[v].a < 0.99f;
(seeThrough ? model.transparent : model.opaque).Append(mesh);
}
return model;
}