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Fix extra perimeter from gap fill where it's impossible

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This commit is contained in:
remi durand 2021-06-14 00:35:54 +02:00
parent c082d1972f
commit e2a7c7368c
1 changed files with 5 additions and 17 deletions
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22
src/libslic3r/PerimeterGenerator.cpp
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@ -752,15 +752,9 @@ void PerimeterGenerator::process()
if (!expoly.holes.empty()) {
//this is a a sort of a loop
//try to see if it's possible to add a "perimeter"
Polygons small_peri = offset(expoly.contour, -(float)(perimeter_spacing), ClipperLib::jtMiter, 3);
Polygons small_holes = expoly.holes;
polygons_reverse(small_holes);
ExPolygons small_ex = diff_ex(small_peri, small_holes);
if (small_ex.size() == 1 && !small_ex.front().holes.empty()) {
ExPolygons contour_expolygon = offset_ex(expoly, -(float)(perimeter_spacing / 2), ClipperLib::jtMiter, 3);
if (contour_expolygon.size() == 1 && !contour_expolygon.front().holes.empty()) {
//OK
Polygons perimeter_line = offset(expoly.contour, -(float)(perimeter_spacing/2), ClipperLib::jtMiter, 3);
if (perimeter_line.size() != 1)
continue;
// update list & variable to let the new perimeter be taken into account
loop_number = contours_size;
if (contours_size >= contours.size()) {
@ -768,16 +762,10 @@ void PerimeterGenerator::process()
holes.emplace_back();
}
//Add the new periemter
contours[contours_size].emplace_back(perimeter_line.front(), contours_size, true, has_steep_overhang);
contours[contours_size].emplace_back(contour_expolygon.front().contour, contours_size, true, has_steep_overhang);
//create the new gapfills
ExPolygon perimeter_area;
perimeter_area.holes.emplace_back(small_ex.front().contour);
perimeter_area.holes.front().reverse();
perimeter_line = offset(perimeter_line.front(), (float)(perimeter_spacing / 2), ClipperLib::jtMiter, 3);
if (perimeter_line.size() != 1) // should never happen
perimeter_line = { expoly.contour };
perimeter_area.contour = perimeter_line.front();
ExPolygons to_add = diff_ex(expoly, perimeter_area);
ExPolygons gapfill_area = offset_ex(expoly.contour, -(float)(perimeter_spacing));
ExPolygons to_add = intersection_ex({ expoly }, gapfill_area);
//add the new gapfill
if (to_add.size() == 0)
expoly.clear();