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feat(ugc): color_brightness and transparent_colors

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color_brightness (percent, default 100: unchanged) scales the models' vertex
colors, not the icons', for servers where the made models look brighter than
they should. transparent_colors names color ids drawn transparent whatever
Materials.xml says: 129 (Tr. Bright Bluish Violet with Glitter) has alpha
255 there, so it came out opaque; a named color gets transparent_opacity.
Both default to off, so models come out byte for byte as before.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
This commit is contained in:
Aaron Kimbrell
2026-09-28 11:07:07 -05:00
parent 2384f46a57
commit 41d336878a
7 changed files with 60 additions and 3 deletions
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32
tests/dUgcTests/UgcTests.cpp
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@@ -1272,3 +1272,35 @@ TEST(UgcShaders, IconsDrawGlowUnlitAndMetalShiny) {
EXPECT_EQ(UgcModel::FromNif(*read, UgcJobs::Shaders{}.TagLooks()).opaque.looks, std::vector<UgcModel::eLook>(4, UgcModel::eLook::GLOW));
EXPECT_TRUE(UgcModel::FromNif(*read).opaque.looks.empty());
}
// color_brightness scales the models' vertex colors (not icons'); transparent_colors makes a color Materials.xml has
// opaque transparent, at transparent_opacity
TEST(UgcModel, BrightnessAndTransparentColors) {
UgcBricks::BrickLibrary library(MakeRes(), 0);
constexpr uint32_t ADDED = 50001;
library.SetMaterials({ { ADDED, { 0, 200, 100, 255 } } });
std::string error;
const auto brick = UgcModel::ParseLxfml("<LXFML versionMajor=\"5\"><Bricks><Brick><Part designID=\"3001\" materials=\"" + std::to_string(ADDED) +
"\"><Bone transformation=\"1,0,0,0,1,0,0,0,1,0,0,0\"/></Part></Brick></Bricks></LXFML>", error);
UgcModel::BuildOptions options;
options.colorVariation = 0.0f;
const auto normal = UgcModel::Build(brick, library, options);
ASSERT_FALSE(normal.opaque.colors.empty());
EXPECT_TRUE(normal.transparent.colors.empty());
options.brightness = 50.0f;
const auto darker = UgcModel::Build(brick, library, options);
ASSERT_FALSE(darker.opaque.colors.empty());
const auto linear = UgcPalette::SrgbToLinear(glm::vec3(normal.opaque.colors[0])) * 0.5f;
EXPECT_NEAR(darker.opaque.colors[0].g, UgcPalette::LinearToSrgb(linear).g, 1e-4f);
options.icon = true;
EXPECT_EQ(UgcModel::Build(brick, library, options).opaque.colors[0], UgcModel::Build(brick, library, [&] { auto o = options; o.brightness = 100.0f; return o; }()).opaque.colors[0]);
options = {};
options.colorVariation = 0.0f;
options.transparentColors.insert(ADDED);
const auto seeThrough = UgcModel::Build(brick, library, options);
EXPECT_TRUE(seeThrough.opaque.colors.empty());
ASSERT_FALSE(seeThrough.transparent.colors.empty());
EXPECT_NEAR(seeThrough.transparent.colors[0].a, 0.5882f, 1e-4f);
}