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#247 fix because a polygon can disappear if grown.

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supermerill 2020-05-18 16:24:56 +02:00
parent e8616d5de4
commit ebc4e9a000
1 changed files with 17 additions and 5 deletions
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22
src/libslic3r/PerimeterGenerator.cpp
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@ -707,19 +707,31 @@ void PerimeterGenerator::process()
//if the shrink split the area in multipe bits
if (expoly_after_shrink_test.size() > 1) {
//remove too small bits
for (int i = 0; i < expoly_after_shrink_test.size(); i++)
if (expoly_after_shrink_test[i].area() < (SCALED_EPSILON*SCALED_EPSILON * 4)
|| offset_ex(ExPolygons{ expoly_after_shrink_test[i] }, min*0.5)[0].area() < minarea) {
for (int i = 0; i < expoly_after_shrink_test.size(); i++) {
if (expoly_after_shrink_test[i].area() < (SCALED_EPSILON * SCALED_EPSILON * 4)) {
expoly_after_shrink_test.erase(expoly_after_shrink_test.begin() + i);
i--;
} else {
ExPolygons wider = offset_ex(ExPolygons{ expoly_after_shrink_test[i] }, min * 0.5);
if (wider.empty() || wider[0].area() < minarea) {
expoly_after_shrink_test.erase(expoly_after_shrink_test.begin() + i);
i--;
}
}
}
//maybe some areas are a just bit too thin, try with just a little more offset to remove them.
ExPolygons expoly_after_shrink_test2 = offset_ex(ExPolygons{ expoly }, double(-min *0.8));
for (int i = 0; i < expoly_after_shrink_test2.size(); i++) {
if (expoly_after_shrink_test2[i].area() < (SCALED_EPSILON*SCALED_EPSILON * 4)
|| offset_ex(ExPolygons{ expoly_after_shrink_test2[i] }, min*0.5)[0].area() < minarea) {
if (expoly_after_shrink_test2[i].area() < (SCALED_EPSILON * SCALED_EPSILON * 4)) {
expoly_after_shrink_test2.erase(expoly_after_shrink_test2.begin() + i);
i--;
}else{
ExPolygons wider = offset_ex(ExPolygons{ expoly_after_shrink_test2[i] }, min * 0.5);
if (wider.empty() || wider[0].area() < minarea) {
expoly_after_shrink_test2.erase(expoly_after_shrink_test2.begin() + i);
i--;
}
}
}
//it's better if there are significantly less extrusions