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debug "Don't print totally unsuported perimeters" aka "no perimeters on bridged area"

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This commit is contained in:
supermerill 2018-07-10 20:20:03 +02:00
parent 4f6e19b3c2
commit 592588af22
1 changed files with 19 additions and 13 deletions
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30
xs/src/libslic3r/PerimeterGenerator.cpp
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@ -76,12 +76,10 @@ void PerimeterGenerator::process()
//store surface for bridge infill to avoid unsupported perimeters (but the first one, this one is always good)
if (this->config->no_perimeter_unsupported && i == this->config->min_perimeter_unsupported
&& this->lower_slices != NULL && !this->lower_slices->expolygons.empty()) {
//note: i don't know where to use the safety offset or not, so if you know, please modify the block.
//compute our unsupported surface
ExPolygons unsupported = diff_ex(last, this->lower_slices->expolygons, true);
if (!unsupported.empty()) {
ExPolygons to_draw;
//remove small overhangs
ExPolygons unsupported_filtered = offset2_ex(unsupported, -(float)(perimeter_spacing), (float)(perimeter_spacing));
if (!unsupported_filtered.empty()) {
@ -103,13 +101,13 @@ void PerimeterGenerator::process()
//simplify to avoid most of artefacts from printing lines.
ExPolygons bridgeable_simplified;
for (ExPolygon &poly : bridgeable) {
poly.simplify(perimeter_spacing/4, &bridgeable_simplified);
poly.simplify(perimeter_spacing/2, &bridgeable_simplified);
}
//offset by perimeter spacing because the simplify may have reduced it a bit.
//it's not dangerous as it will be intersected by 'unsupported' later
to_draw.insert(to_draw.end(), bridgeable.begin(), bridgeable.end());
//FIXME: add overlap in this->fill_surfaces->append
// add overlap (perimeter_spacing/4 was good in test, ie 25%)
coord_t overlap = scale_(this->config->get_abs_value("infill_overlap", perimeter_spacing));
coord_t overlap = scale_(this->config->get_abs_value("infill_overlap", unscale(perimeter_spacing)));
unsupported_filtered = intersection_ex(unsupported_filtered, offset_ex(bridgeable_simplified, overlap));
} else {
unsupported_filtered.clear();
@ -126,24 +124,32 @@ void PerimeterGenerator::process()
unsupported_filtered = intersection_ex(unsupported_filtered, ExPolygons() = { hull });
}
if (!unsupported_filtered.empty()) {
//to_draw.insert(to_draw.end(), detector._anchor_regions.begin(), detector._anchor_regions.end());
//and we want at least 1 perimeter of overlap
ExPolygons bridge = unsupported_filtered;
unsupported_filtered = intersection_ex(offset_ex(unsupported_filtered, (float)(perimeter_spacing)), last);
// unsupported need to be offset_ex by -(float)(perimeter_spacing/2) for the hole to be flush
ExPolygons supported = diff_ex(last, unsupported_filtered); //offset_ex(unsupported_filtered, -(float)(perimeter_spacing / 2)), true);
ExPolygons bridge_and_support = union_ex(bridge, support);
//to_draw.insert(to_draw.end(), support.begin(), support.end());
// remove from the bridge & support the small inmperfections of the union
ExPolygons bridge_and_support = offset2_ex(union_ex(bridge, support, true), perimeter_spacing/2, -perimeter_spacing/2);
// make him flush with perimeter area
unsupported_filtered = intersection_ex(offset_ex(unsupported_filtered, (float)(perimeter_spacing / 2)), bridge_and_support);
// store the results
last = supported;
//add this directly to the infill list.
// this will avoid to throw wrong offsets into a good polygons
this->fill_surfaces->append(
unsupported_filtered,
stInternal);
// store the results
last = diff_ex(last, unsupported_filtered, true);
//remove "thin air" polygons
for (int i = 0; i < last.size();i++) {
if (intersection_ex(support, ExPolygons() = { last[i] }).empty()) {
this->fill_surfaces->append(
ExPolygons() = { last[i] },
stInternal);
last.erase(last.begin() + i);
i--;
}
}
}
}
}