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CLIPPER_OFFSET_SCALE was made a power of two, the scaling functions

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inside ClipperUtils are now using bit shifts instead of multiplication
by doubles, which makes the scaling precise.

Removed the scale parameter from all offset functions.

Modified the safety offset to calculate offset per polygon instead
of over all polygons at once. The old way was not safe and very slow,
sometimes this meant a kiss of death for supports for example.
This commit is contained in:
bubnikv 2016-11-28 17:33:17 +01:00
parent e93253e270
commit 695c92fb00
14 changed files with 214 additions and 152 deletions
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4
lib/Slic3r/Print.pm
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@ -276,7 +276,7 @@ sub make_skirt {
my $distance = scale max($self->config->skirt_distance, $self->config->brim_width);
for (my $i = $skirts; $i > 0; $i--) {
$distance += scale $spacing;
my $loop = offset([$convex_hull], $distance, 1, JT_ROUND, scale(0.1))->[0];
my $loop = offset([$convex_hull], $distance, JT_ROUND, scale(0.1))->[0];
my $eloop = Slic3r::ExtrusionLoop->new_from_paths(
Slic3r::ExtrusionPath->new(
polyline => Slic3r::Polygon->new(@$loop)->split_at_first_point,
@ -369,7 +369,7 @@ sub make_brim {
# -0.5 because islands are not represented by their centerlines
# (first offset more, then step back - reverse order than the one used for
# perimeters because here we're offsetting outwards)
push @loops, @{offset2(\@islands, ($i + 0.5) * $flow->scaled_spacing, -1.0 * $flow->scaled_spacing, 100000, JT_SQUARE)};
push @loops, @{offset2(\@islands, ($i + 0.5) * $flow->scaled_spacing, -1.0 * $flow->scaled_spacing, JT_SQUARE)};
}
$self->brim->append(map Slic3r::ExtrusionLoop->new_from_paths(