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SPE-1963: Improve ordering of perimeters with Arachne perimeter generator

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Especially in cases when the object is composed only of 2 external perimeters and 1 or 2 internal perimeters, the order of perimeters wasn't optimal and differed from the Classic perimeter generator. That caused unnecessary long travels before the external contour was printed.

The ordering of perimeters is slightly inspired by the latest changes in CuraEngine.

Cherry-picked from prusa3d/PrusaSlicer@10875082de

Co-authored-by: Lukáš Hejl <hejl.lukas@gmail.com>
This commit is contained in:
Noisyfox
2024-12-22 17:49:08 +08:00
parent 4b739539a4
commit babb84c70a
8 changed files with 890 additions and 756 deletions
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23
src/libslic3r/Arachne/utils/ExtrusionLine.cpp
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@@ -253,9 +253,10 @@ bool ExtrusionLine::is_contour() const
return poly.is_clockwise();
}
double ExtrusionLine::area() const
{
assert(this->is_closed);
double ExtrusionLine::area() const {
if (!this->is_closed)
return 0.;
double a = 0.;
if (this->junctions.size() >= 3) {
Vec2d p1 = this->junctions.back().p.cast<double>();
@@ -265,9 +266,25 @@ double ExtrusionLine::area() const
p1 = p2;
}
}
return 0.5 * a;
}
Points to_points(const ExtrusionLine &extrusion_line) {
Points points;
points.reserve(extrusion_line.junctions.size());
for (const ExtrusionJunction &junction : extrusion_line.junctions)
points.emplace_back(junction.p);
return points;
}
BoundingBox get_extents(const ExtrusionLine &extrusion_line) {
BoundingBox bbox;
for (const ExtrusionJunction &junction : extrusion_line.junctions)
bbox.merge(junction.p);
return bbox;
}
} // namespace Slic3r::Arachne
namespace Slic3r {