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Fixes and improvements to thin wall detection. #2829

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This commit is contained in:
Alessandro Ranellucci 2015-05-22 01:46:01 +02:00
parent 70ec433e67
commit 31e0fc7f17
2 changed files with 59 additions and 47 deletions
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13
xs/src/libslic3r/ExPolygon.cpp
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@ -191,12 +191,25 @@ ExPolygon::medial_axis(double max_width, double min_width, Polylines* polylines)
// unless they represent closed loops
for (Polylines::iterator polyline = polylines->begin(); polyline != polylines->end(); ++polyline) {
if (polyline->points.front().distance_to(polyline->points.back()) < min_width) continue;
// TODO: we should *not* extend endpoints where other polylines start/end
// (such as T joints, which are returned as three polylines by MedialAxis)
polyline->extend_start(max_width);
polyline->extend_end(max_width);
}
// clip again after extending endpoints to prevent them from exceeding the expolygon boundaries
intersection(*polylines, *this, polylines);
// remove too short polylines
// (we can't do this check before endpoints extension and clipping because we don't
// know how long will the endpoints be extended since it depends on polygon thickness
// which is variable - extension will be <= max_width/2 on each side)
for (size_t i = 0; i < polylines->size(); ++i) {
if ((*polylines)[i].length() < max_width) {
polylines->erase(polylines->begin() + i);
--i;
}
}
}
void