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Texture displacement: mix filament colours in the slicer (#16242)

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ExPikaPaka
2026-10-09 17:52:35 +08:00
committed by GitHub
parent 1bddcf3ab6
commit 62b829d1cb
19 changed files with 324 additions and 329 deletions
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src/libslic3r/TextureDisplacement.cpp
+22 -11
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@@ -2372,12 +2372,11 @@ indexed_triangle_set build_texture_displacement_v2(const indexed_triangle_set
//
// The *palette* index, not the printed filament. The decimation treats any edge whose two faces
// differ as a crease (TextureBakeDecimate.cpp), so it must only ever see where the **perceived**
// colour changes - which is exactly what ColorResolveFn's own contract says the interleaving may
// never be fed into. Handing it the resolved filament made every Z band boundary a crease: on an
// upright wall that is one crease per band, so the collapse ran along those lines and left a stack
// of horizontal slivers, each printing in a single filament. Those were the horizontal colour
// lines in the baked result, and they also spent the triangle budget drawing a pattern the eye is
// meant to blend away. Faces the paint excludes are skipped by the pipeline itself.
// colour changes. A mix is one perceived colour however its components are laid down, which is why
// it has to be the palette index here: back when this was handed a per-triangle interleave instead,
// every band boundary read as a crease, the collapse ran along those lines and left a stack of
// horizontal slivers, and the triangle budget went on drawing a pattern the eye is meant to blend
// away. Faces the paint excludes are skipped by the pipeline itself.
const TextureBake::ColorSampleFn color_sample =
color_sampler ? TextureBake::ColorSampleFn([&color_sampler](const Vec3f &p, const Vec3f &n) {
return color_sampler(p, n);
@@ -2403,7 +2402,7 @@ indexed_triangle_set build_texture_displacement_v2(const indexed_triangle_set
stats->triangles_budget = result.triangles_budget;
stats->budget_limited = result.budget_limited;
}
indexed_triangle_set out = TextureBake::to_indexed_triangle_set(result.geometry);
indexed_triangle_set out = TextureBake::to_indexed_triangle_set(result.geometry, &result.face_color);
if (out.indices.empty())
return mesh;
if (flip_normals)
@@ -2424,6 +2423,8 @@ indexed_triangle_set build_texture_displacement_v2(const indexed_triangle_set
max_depth = std::max(max_depth, std::abs(layer.depth_mm));
const float relief_tol = max_depth + paint_tol;
std::vector<int> palette(out.indices.size(), -1);
const std::vector<int> &face_mask = result.face_color;
const bool have_face_mask = face_mask.size() == out.indices.size();
tbb::parallel_for(tbb::blocked_range<size_t>(0, out.indices.size()), [&](const tbb::blocked_range<size_t> &r) {
for (size_t i = r.begin(); i < r.end(); ++i) {
const stl_triangle_vertex_indices &t = out.indices[i];
@@ -2439,8 +2440,19 @@ indexed_triangle_set build_texture_displacement_v2(const indexed_triangle_set
// reason; this path was the inconsistent one.
Vec3f foot = centroid, base_n = Vec3f::UnitZ();
const float d2 = painted_closest(centroid, &foot, &base_n);
if (!all_painted && d2 >= relief_tol * relief_tol)
// Which faces may be coloured comes from the pipeline, which recorded it on the
// refined mesh where the paint mask is exact, and carried it through the collapse,
// the T-junction repair and the weld. Proximity cannot answer this: a displaced face
// is no longer where its base was, so on a part thinner than the relief depth the
// nearest painted surface to the *opposite* face is the painted one, and the texture
// appeared there too. Only the position to sample at still comes from the base
// surface, for the projection reason above.
if (have_face_mask) {
if (face_mask[i] == TextureBake::FACE_UNPAINTED)
continue;
} else if (!all_painted && d2 >= relief_tol * relief_tol) {
continue;
}
palette[i] = sampler(foot, base_n);
}
});
@@ -2462,7 +2474,7 @@ indexed_triangle_set build_texture_displacement_v2(const indexed_triangle_set
Vec3f normal = (b - a).cross(c - a);
const float nl = normal.norm();
normal = (nl > 0.f) ? Vec3f(normal / nl) : Vec3f::UnitZ();
const int filament = color->resolve ? color->resolve(palette[i], centroid, normal) : palette[i];
const int filament = palette[i];
if (filament >= 0)
out_color[i] = uint8_t(std::min(filament + 1, 255));
}
@@ -2919,8 +2931,7 @@ static indexed_triangle_set build_texture_displacement_in_place(
Vec3f normal = (b - a).cross(c - a);
const float nl = normal.norm();
normal = (nl > 0.f) ? Vec3f(normal / nl) : Vec3f::UnitZ();
const int filament = color->resolve ? color->resolve(triangle_palette[i], centroid, normal)
: triangle_palette[i];
const int filament = triangle_palette[i];
if (filament >= 0)
out_color[i] = uint8_t(std::min(filament + 1, 255));
}