3DPrinting/PrusaSlicer-NonPlainar
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Fix of safety_offset() after ClipperUtils refactoring.

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Fixes Solid infill where there should be none #6482
Also the safety offsetting was revised to be enabled only where needed,
the "do safety offset" is now easy to discover by
a new ApplySafetyOffset::Yes enum, and safety offset over union, which
is better done by offset() / offset_ex() has been replaced with
new union_safety_offset() / union_safety_offset_ex() functions, which
better convey their meaning and which could be better optimized than
union() with the safety offset applied.
This commit is contained in:
Vojtech Bubnik 2021-05-05 12:16:40 +02:00
parent cc68a292d1
commit 7d4b3f2992
10 changed files with 210 additions and 194 deletions
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5
src/libslic3r/PerimeterGenerator.cpp
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@ -349,7 +349,7 @@ void PerimeterGenerator::process()
coord_t min_width = coord_t(scale_(this->ext_perimeter_flow.nozzle_diameter() / 3));
ExPolygons expp = offset2_ex(
// medial axis requires non-overlapping geometry
diff_ex(last, offset(offsets, float(ext_perimeter_width / 2.)), true),
diff_ex(last, offset(offsets, float(ext_perimeter_width / 2.) + ClipperSafetyOffset)),
- float(min_width / 2.), float(min_width / 2.));
// the maximum thickness of our thin wall area is equal to the minimum thickness of a single loop
for (ExPolygon &ex : expp)
@ -496,8 +496,7 @@ void PerimeterGenerator::process()
ExPolygons gaps_ex = diff_ex(
//FIXME offset2 would be enough and cheaper.
offset2_ex(gaps, - float(min / 2.), float(min / 2.)),
offset2_ex(gaps, - float(max / 2.), float(max / 2.)),
true);
offset2_ex(gaps, - float(max / 2.), float(max / 2. + ClipperSafetyOffset)));
ThickPolylines polylines;
for (const ExPolygon &ex : gaps_ex)
ex.medial_axis(max, min, &polylines);