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Reworked the bridge detector to allow searching a single bridging

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direction over multiple regions. This allows a single bridge to be
drawn over holes, which are too close to each other to allow
for separate bridges.
Fixes Bridging-Angle not optimal
https://github.com/prusa3d/Slic3r/issues/12

Re-allowed adaptive infill line width for solid infills. The adaptive
infill line width works in some circumstances, see Issue #15,
but the original implementation often changed the line width too
aggressively. The current implementation limits the line width change
to 20%.
Fixes Gaps between infill and perimeter leads to errors in laydown on following layer
https://github.com/prusa3d/Slic3r/issues/15
This commit is contained in:
bubnikv 2016-11-08 09:59:25 +01:00
parent 5a81731577
commit 22ca927f12
7 changed files with 433 additions and 443 deletions
Download patch file Download diff file Expand all files Collapse all files

42
xs/src/libslic3r/BridgeDetector.hpp
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@ -8,20 +8,29 @@
namespace Slic3r {
// The bridge detector optimizes a direction of bridges over a region or a set of regions.
// A bridge direction is considered optimal, if the length of the lines strang over the region is maximal.
// This is optimal if the bridge is supported in a single direction only, but
// it may not likely be optimal, if the bridge region is supported from all sides. Then an optimal
// solution would find a direction with shortest bridges.
// The bridge orientation is measured CCW from the X axis.
class BridgeDetector {
public:
// The non-grown hole.
ExPolygon expolygon;
// The non-grown holes.
const ExPolygons &expolygons;
// In case the caller gaves us the input polygons by a value, make a copy.
ExPolygons expolygons_owned;
// Lower slices, all regions.
ExPolygonCollection lower_slices;
const ExPolygonCollection &lower_slices;
// Scaled extrusion width of the infill.
double extrusion_width;
coord_t spacing;
// Angle resolution for the brute force search of the best bridging angle.
double resolution;
double resolution;
// The final optimal angle.
double angle;
double angle;
BridgeDetector(const ExPolygon &_expolygon, const ExPolygonCollection &_lower_slices, coord_t _extrusion_width);
BridgeDetector(ExPolygon _expolygon, const ExPolygonCollection &_lower_slices, coord_t _extrusion_width);
BridgeDetector(const ExPolygons &_expolygons, const ExPolygonCollection &_lower_slices, coord_t _extrusion_width);
bool detect_angle();
void coverage(double angle, Polygons* coverage) const;
Polygons coverage(double angle = -1) const;
@ -29,10 +38,27 @@ public:
Polylines unsupported_edges(double angle = -1) const;
private:
void initialize();
struct BridgeDirection {
BridgeDirection(double a = -1.) : angle(a), coverage(0.), max_length(0.) {}
// the best direction is the one causing most lines to be bridged (thus most coverage)
bool operator<(const BridgeDirection &other) const {
// Initial sort by coverage only - comparator must obey strict weak ordering
return this->coverage > other.coverage;
};
double angle;
double coverage;
double max_length;
};
// Get possible briging direction candidates.
std::vector<double> bridge_direction_candidates() const;
// Open lines representing the supporting edges.
Polylines _edges;
// Closed polygons representing the supporting areas.
ExPolygons _anchors;
ExPolygons _anchor_regions;
};
}