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Prevent variable-width logic from causing negative extrusion. #3220

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This commit is contained in:
Alessandro Ranellucci 2016-07-10 14:35:53 +02:00
parent 546312a18d
commit f352406c33
1 changed files with 7 additions and 3 deletions
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10
xs/src/libslic3r/PerimeterGenerator.cpp
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@ -492,16 +492,20 @@ PerimeterGenerator::_variable_width(const ThickPolylines &polylines, ExtrusionRo
const double w = fmax(line.a_width, line.b_width);
if (path.polyline.points.empty()) {
path.polyline.append(line.a);
path.polyline.append(line.b);
flow.width = unscale(w);
#ifdef SLIC3R_DEBUG
printf(" filling %f gap\n", flow.width);
#endif
// make sure we don't include too thin segments which
// may cause even slightly negative mm3_per_mm because of floating point math
path.mm3_per_mm = flow.mm3_per_mm();
if (path.mm3_per_mm < EPSILON) continue;
path.width = flow.width;
path.height = flow.height;
path.polyline.append(line.a);
path.polyline.append(line.b);
} else {
thickness_delta = fabs(scale_(flow.width) - w);
if (thickness_delta <= tolerance) {