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Workaround Clipper changing point coordinates while performing simplify_polygons(), thus causing a crash in Slic3r. #2306

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This commit is contained in:
Alessandro Ranellucci 2014-11-08 12:56:14 +01:00
parent a78be203aa
commit 9c93e52c8f
4 changed files with 14 additions and 7 deletions
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11
lib/Slic3r/GCode.pm
View File

@ -148,12 +148,19 @@ sub extrude_loop {
if ($self->config->seam_position eq 'nearest') {
@candidates = @$polygon if !@candidates;
$point = $last_pos->nearest_point(\@candidates);
$loop->split_at_vertex($point);
if (!$loop->split_at_vertex($point)) {
# On 32-bit Linux, Clipper will change some point coordinates by 1 unit
# while performing simplify_polygons(), thus split_at_vertex() won't
# find them anymore.
$loop->split_at($point);
}
} elsif (@candidates) {
my @non_overhang = grep !$loop->has_overhang_point($_), @candidates;
@candidates = @non_overhang if @non_overhang;
$point = $last_pos->nearest_point(\@candidates);
$loop->split_at_vertex($point);
if (!$loop->split_at_vertex($point)) {
$loop->split_at($point);
}
} else {
$point = $last_pos->projection_onto_polygon($polygon);
$loop->split_at($point);

6
xs/src/libslic3r/ExtrusionEntity.cpp
View File

@ -224,7 +224,7 @@ ExtrusionLoop::length() const
return len;
}
void
bool
ExtrusionLoop::split_at_vertex(const Point &point)
{
for (ExtrusionPaths::iterator path = this->paths.begin(); path != this->paths.end(); ++path) {
@ -261,10 +261,10 @@ ExtrusionLoop::split_at_vertex(const Point &point)
// we can now override the old path list with the new one and stop looping
this->paths = new_paths;
}
return;
return true;
}
}
CONFESS("Point not found");
return false;
}
void

2
xs/src/libslic3r/ExtrusionEntity.hpp
View File

@ -92,7 +92,7 @@ class ExtrusionLoop : public ExtrusionEntity
Point last_point() const;
void polygon(Polygon* polygon) const;
double length() const;
void split_at_vertex(const Point &point);
bool split_at_vertex(const Point &point);
void split_at(const Point &point);
void clip_end(double distance, ExtrusionPaths* paths) const;
bool has_overhang_point(const Point &point) const;

2
xs/xsp/ExtrusionLoop.xsp
View File

@ -20,7 +20,7 @@
void append(ExtrusionPath* path)
%code{% THIS->paths.push_back(*path); %};
double length();
void split_at_vertex(Point* point)
bool split_at_vertex(Point* point)
%code{% THIS->split_at_vertex(*point); %};
void split_at(Point* point)
%code{% THIS->split_at(*point); %};