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Port seam fix for Arachne from PrusaSlicer

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Signed-off-by: SoftFever <softfeverever@gmail.com>
This commit is contained in:
SoftFever 2023-01-26 01:43:23 +08:00
parent 854470cfba
commit 031a027717
1 changed files with 33 additions and 8 deletions
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41
src/libslic3r/GCode/SeamPlacer.cpp
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@ -1324,17 +1324,42 @@ void SeamPlacer::place_seam(const Layer *layer, ExtrusionLoop &loop, bool extern
assert(layer->id() >= po->slicing_parameters().raft_layers());
const size_t layer_index = layer->id() - po->slicing_parameters().raft_layers();
const double unscaled_z = layer->slice_z;
auto get_next_loop_point = [&loop](ExtrusionLoop::ClosestPathPoint current) {
current.segment_idx += 1;
if (current.segment_idx >= loop.paths[current.path_idx].polyline.points.size()) {
current.path_idx = next_idx_modulo(current.path_idx, loop.paths.size());
current.segment_idx = 0;
}
current.foot_pt = loop.paths[current.path_idx].polyline.points[current.segment_idx];
return current;
};
const PrintObjectSeamData::LayerSeams &layer_perimeters = m_seam_per_object.find(layer->object())->second.layers[layer_index];
const PrintObjectSeamData::LayerSeams& layer_perimeters =
m_seam_per_object.find(layer->object())->second.layers[layer_index];
// Find the closest perimeter in the SeamPlacer to the first point of this loop.
size_t closest_perimeter_point_index;
{
const Point &fp = loop.first_point();
Vec2f unscaled_p = unscaled<float>(fp);
closest_perimeter_point_index = find_closest_point(*layer_perimeters.points_tree.get(), to_3d(unscaled_p, float(unscaled_z)));
// Find the closest perimeter in the SeamPlacer to this loop.
// Repeat search until two consecutive points of the loop are found, that result in the same closest_perimeter
// This is beacuse with arachne, T-Junctions may exist and sometimes the wrong perimeter was chosen
size_t closest_perimeter_point_index = 0;
{ // local space for the closest_perimeter_point_index
Perimeter* closest_perimeter = nullptr;
ExtrusionLoop::ClosestPathPoint closest_point{ 0,0,loop.paths[0].polyline.points[0] };
size_t points_count = std::accumulate(loop.paths.begin(), loop.paths.end(), 0, [](size_t acc, const ExtrusionPath& p) {
return acc + p.polyline.points.size();
});
for (size_t _ = 0; _ < points_count; ++_) {
Vec2f unscaled_p = unscaled<float>(closest_point.foot_pt);
closest_perimeter_point_index = find_closest_point(*layer_perimeters.points_tree.get(),
to_3d(unscaled_p, float(unscaled_z)));
if (closest_perimeter != &layer_perimeters.points[closest_perimeter_point_index].perimeter) {
closest_perimeter = &layer_perimeters.points[closest_perimeter_point_index].perimeter;
closest_point = get_next_loop_point(closest_point);
}
else {
break;
}
}
}
Vec3f seam_position;
size_t seam_index;
if (const Perimeter &perimeter = layer_perimeters.points[closest_perimeter_point_index].perimeter; perimeter.finalized) {