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Apply the Belt Slicing Transform to Painted Supports and Seams

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Painted support/seam facets, support volumes, seam occlusion, MMU and fuzzy skin painting (top/bottom
and side facets) and the adaptive infill octree used trafo_centered(), or trafo() with a centre-offset
shift, while the layers were sliced with the belt rotation, remap and Z lift; they now share
PrintObject::trafo_sliced().
This commit is contained in:
Hanif Koh
2026-09-14 17:27:32 +08:00
parent 9cca3093ee
commit 5092831007
5 changed files with 26 additions and 11 deletions
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src/libslic3r/MultiMaterialSegmentation.cpp
+6 -5
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@@ -1215,7 +1215,7 @@ static inline std::vector<std::vector<ExPolygons>> segmentation_top_and_bottom_l
// project downards pointing painted triangles over bottom surfaces.
std::vector<std::vector<Polygons>> top_raw(num_facets_states), bottom_raw(num_facets_states);
std::vector<float> zs = zs_from_layers(layers);
Transform3d object_trafo = print_object.trafo_centered();
Transform3d object_trafo = print_object.trafo_sliced();
#ifdef MM_SEGMENTATION_DEBUG_TOP_BOTTOM
static int iRun = 0;
@@ -2039,17 +2039,19 @@ std::vector<std::vector<ExPolygons>> segmentation_by_painting(const PrintObject
}
BOOST_LOG_TRIVIAL(debug) << "Print object segmentation - Projection of painted triangles - Begin";
// The layers were sliced in this frame (belt rotation, remap and Z lift included), and it already centers the object.
const Transform3d object_trafo = print_object.trafo_sliced();
for (const ModelVolume *mv : print_object.model_object()->volumes) {
const ModelVolumeFacetsInfo facets_info = extract_facets_info(*mv);
tbb::parallel_for(tbb::blocked_range<size_t>(1, num_facets_states), [&mv, &print_object, &facets_info, &layers, &edge_grids, &painted_lines, &painted_lines_mutex, &input_expolygons, &throw_on_cancel_callback](const tbb::blocked_range<size_t> &range) {
tbb::parallel_for(tbb::blocked_range<size_t>(1, num_facets_states), [&mv, &object_trafo, &facets_info, &layers, &edge_grids, &painted_lines, &painted_lines_mutex, &input_expolygons, &throw_on_cancel_callback](const tbb::blocked_range<size_t> &range) {
for (size_t extruder_idx = range.begin(); extruder_idx < range.end(); ++extruder_idx) {
throw_on_cancel_callback();
const indexed_triangle_set custom_facets = facets_info.facets_annotation.get_facets(*mv, EnforcerBlockerType(extruder_idx));
if (!mv->is_model_part() || custom_facets.indices.empty())
continue;
const Transform3f tr = print_object.trafo().cast<float>() * mv->get_matrix().cast<float>();
tbb::parallel_for(tbb::blocked_range<size_t>(0, custom_facets.indices.size()), [&tr, &custom_facets, &print_object, &layers, &edge_grids, &input_expolygons, &painted_lines, &painted_lines_mutex, &extruder_idx](const tbb::blocked_range<size_t> &range) {
const Transform3f tr = (object_trafo * mv->get_matrix()).cast<float>();
tbb::parallel_for(tbb::blocked_range<size_t>(0, custom_facets.indices.size()), [&tr, &custom_facets, &layers, &edge_grids, &input_expolygons, &painted_lines, &painted_lines_mutex, &extruder_idx](const tbb::blocked_range<size_t> &range) {
for (size_t facet_idx = range.begin(); facet_idx < range.end(); ++facet_idx) {
float min_z = std::numeric_limits<float>::max();
float max_z = std::numeric_limits<float>::lowest();
@@ -2102,7 +2104,6 @@ std::vector<std::vector<ExPolygons>> segmentation_by_painting(const PrintObject
Line line_to_test(Point(scale_(line_start_f.x()), scale_(line_start_f.y())),
Point(scale_(line_end_f.x()), scale_(line_end_f.y())));
line_to_test.translate(-print_object.center_offset());
// BoundingBoxes for EdgeGrids are computed from printable regions. It is possible that the painted line (line_to_test) could
// be outside EdgeGrid's BoundingBox, for example, when the negative volume is used on the painted area (GH #7618).