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FIX: AO/Emissive loading fix

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hydrogendeuteride
2025-12-05 16:54:00 +09:00
parent 28572c1679
commit 20f6ad494c
5 changed files with 64 additions and 13 deletions
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27
src/scene/vk_loader.cpp
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@@ -389,12 +389,35 @@ std::optional<std::shared_ptr<LoadedGLTF> > loadGltf(VulkanEngine *engine,
constants.metal_rough_factors.y = mat.pbrData.roughnessFactor;
// extra[0].x: normalScale (default 1.0)
constants.extra[0].x = 1.0f;
// extra[0].y: occlusionStrength (0..1, default 1.0)
constants.extra[0].y = mat.occlusionTexture.has_value() ? mat.occlusionTexture->strength : 1.0f;
// extra[0].y: occlusionStrength (0..1)
// extra[0].z: hasAO flag (1.0 if an occlusionTexture is present, 0.0 otherwise)
if (mat.occlusionTexture.has_value())
{
constants.extra[0].y = mat.occlusionTexture->strength;
constants.extra[0].z = 1.0f;
}
else
{
constants.extra[0].y = 0.0f;
constants.extra[0].z = 0.0f;
}
// extra[1].rgb: emissiveFactor
constants.extra[1].x = mat.emissiveFactor[0];
constants.extra[1].y = mat.emissiveFactor[1];
constants.extra[1].z = mat.emissiveFactor[2];
// If an emissive texture is present but the factor is left at 0,
// default to white so the texture is visible (common authoring pattern).
if (mat.emissiveTexture.has_value())
{
if (constants.extra[1].x == 0.0f &&
constants.extra[1].y == 0.0f &&
constants.extra[1].z == 0.0f)
{
constants.extra[1].x = 1.0f;
constants.extra[1].y = 1.0f;
constants.extra[1].z = 1.0f;
}
}
// extra[2].x: alphaCutoff for MASK materials (>0 enables alpha test)
constants.extra[2].x = 0.0f;
if (mat.alphaMode == fastgltf::AlphaMode::Mask)