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feat(ugc): glitter flecks (LEGO-AnimUV) and milky satin in made models

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Glitter colors (Materials.xml type glitter, glitter_colors 114,117) go into
S21_Glitter_Model and, transparent, S21_GlitterAlpha_Model (shader_glitter,
default 21, LEGO-AnimUV). Their shapes get box-projected UVs, an
NiTexturingProperty with a stored 128 px mipmapped fleck texture
(NiSourceTexture + NiPersistentSrcTextureRendererData, as the client's own
env_ag_ocean-maelstrom.nif) and two NiTextureTransformControllers looping
the base map's translation (glitter_size, glitter_density, glitter_speed).
The shader lays the texture over the vertex color by its alpha and outputs
the vertex alpha, so transparent glitter blends as S01_Alpha does.

Satin colors (satin_colors, LEGO's opal colors) stay in S01_Alpha but get
satin_opacity and are whitened by satin_whiten.

NifFile reads the base map's scroll speed (uvScroll) from the controllers;
the icon draws still flecks, the UGC 3D view and the LXFML viewers moving
ones. stats.json counts the glitter groups. With shader_glitter 0 and no
satin colors the files are the same bytes as before (tested). Also keeps
glow_emissive for the icon (it was reset by the icon settings).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Aaron Kimbrell
2026-09-28 12:53:52 -05:00
parent 49c1486771
commit dfe4cc523a
24 changed files with 966 additions and 93 deletions
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9
dUgcServer/UgcFormats.h
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@@ -7,6 +7,7 @@
#include <string_view>
#include <vector>
#include "UgcGlitter.h"
#include "UgcModel.h"
#include "UgcRender.h"
@@ -43,13 +44,19 @@ namespace UgcFormats {
// NiMaterialProperty's emissive color (grey) of the group's shapes; 0 the shared white material with none.
// The client's emissive shader (S46) lerps from the lit color to the vertex color by vertex alpha times its red.
float emissive{};
// The glitter of the UGC server's glitter groups (docs/UgcServer.md, "Metal and glow"): the shapes get UVs
// (UgcGlitter::Uv) and an NiTexturingProperty whose base map is the fleck texture stored in the file
// (NiSourceTexture, NiPersistentSrcTextureRendererData), its texture transform's translation looped by an
// NiTextureTransformController for U and one for V. Null: none.
const UgcGlitter::Params* glitter{};
};
/**
* The layout LU Toolbox exports (setup_lod_data) and the game's own brick models (res/BrickModels/ndmade) have:
* the root node, an NiLODNode per group with NiRangeLODData holding each level's distances, a node per level and
* the level's shapes under it, named like the group. Properties as WriteNif; a group with
* an emissive color gets a material of its own.
* an emissive color gets a material of its own, a glitter group the glitter texture's NiTexturingProperty (one
* for every glitter group of the file).
*/
std::string WriteLodNif(const std::string& rootName, const std::vector<NifLodGroup>& groups);