203 lines
7.0 KiB
Perl
203 lines
7.0 KiB
Perl
package Slic3r::STL;
|
|
use Moo;
|
|
|
|
use CAD::Format::STL;
|
|
use Math::Clipper qw(integerize_coordinate_sets is_counter_clockwise);
|
|
use Slic3r::Geometry qw(three_points_aligned longest_segment);
|
|
use XXX;
|
|
|
|
use constant X => 0;
|
|
use constant Y => 1;
|
|
use constant Z => 2;
|
|
use constant MIN => 0;
|
|
use constant MAX => 1;
|
|
|
|
sub parse_file {
|
|
my $self = shift;
|
|
my ($file) = @_;
|
|
|
|
# open STL file
|
|
my $stl = CAD::Format::STL->new->load($file);
|
|
|
|
if ($Slic3r::rotate > 0) {
|
|
my $deg = Slic3r::Geometry::deg2rad($Slic3r::rotate);
|
|
foreach my $facet ($stl->part->facets) {
|
|
my ($normal, @vertices) = @$facet;
|
|
foreach my $vertex (@vertices) {
|
|
@$vertex = (@{ +(Slic3r::Geometry::rotate_points($deg, undef, [ $vertex->[X], $vertex->[Y] ]))[0] }, $vertex->[Z]);
|
|
}
|
|
}
|
|
}
|
|
|
|
# we only want to work with positive coordinates, so let's
|
|
# find our object extents to calculate coordinate displacements
|
|
my @extents = (map [99999999999, -99999999999], X,Y,Z);
|
|
foreach my $facet ($stl->part->facets) {
|
|
my ($normal, @vertices) = @$facet;
|
|
foreach my $vertex (@vertices) {
|
|
for (X,Y,Z) {
|
|
$extents[$_][MIN] = $vertex->[$_] if $vertex->[$_] < $extents[$_][MIN];
|
|
$extents[$_][MAX] = $vertex->[$_] if $vertex->[$_] > $extents[$_][MAX];
|
|
}
|
|
}
|
|
}
|
|
|
|
# scale extents
|
|
for (X,Y,Z) {
|
|
$extents[$_][MIN] *= $Slic3r::scale;
|
|
$extents[$_][MAX] *= $Slic3r::scale;
|
|
}
|
|
|
|
# multiply object
|
|
my @multiply_offset = (
|
|
(($extents[X][MAX] - $extents[X][MIN]) + $Slic3r::multiply_distance),
|
|
(($extents[Y][MAX] - $extents[Y][MIN]) + $Slic3r::multiply_distance),
|
|
);
|
|
$extents[X][MAX] += $multiply_offset[X] * ($Slic3r::multiply_x-1);
|
|
$extents[Y][MAX] += $multiply_offset[Y] * ($Slic3r::multiply_y-1);
|
|
my @copies = ();
|
|
for (my $i = 0; $i < $Slic3r::multiply_x; $i++) {
|
|
for (my $j = 0; $j < $Slic3r::multiply_y; $j++) {
|
|
push @copies, [ $multiply_offset[X] * $i, $multiply_offset[Y] * $j ];
|
|
}
|
|
}
|
|
|
|
# initialize print job
|
|
my $print = Slic3r::Print->new(
|
|
x_length => ($extents[X][MAX] - $extents[X][MIN]) / $Slic3r::resolution,
|
|
y_length => ($extents[Y][MAX] - $extents[Y][MIN]) / $Slic3r::resolution,
|
|
);
|
|
|
|
# calculate the displacements needed to
|
|
# have lowest value for each axis at coordinate 0
|
|
my @shift = map sprintf('%.0f', -$extents[$_][MIN] / $Slic3r::resolution), X,Y,Z;
|
|
|
|
# process facets
|
|
foreach my $facet ($stl->part->facets) {
|
|
|
|
# transform vertex coordinates
|
|
my ($normal, @vertices) = @$facet;
|
|
foreach my $vertex (@vertices) {
|
|
$vertex->[$_] = ($Slic3r::scale * $vertex->[$_] / $Slic3r::resolution) + $shift[$_]
|
|
for X,Y,Z;
|
|
}
|
|
|
|
foreach my $copy (@copies) {
|
|
my @copy_vertices = map [ @$_ ], @vertices; # clone vertices
|
|
foreach my $vertex (@copy_vertices) {
|
|
$vertex->[$_] += $copy->[$_] / $Slic3r::resolution for X,Y;
|
|
}
|
|
$self->_facet($print, $normal, @copy_vertices);
|
|
}
|
|
}
|
|
|
|
return $print;
|
|
}
|
|
|
|
sub _facet {
|
|
my $self = shift;
|
|
my ($print, $normal, @vertices) = @_;
|
|
Slic3r::debugf "\n==> FACET (%f,%f,%f - %f,%f,%f - %f,%f,%f):\n", map @$_, @vertices
|
|
if $Slic3r::debug;
|
|
|
|
# find the vertical extents of the facet
|
|
my ($min_z, $max_z) = (99999999999, -99999999999);
|
|
foreach my $vertex (@vertices) {
|
|
$min_z = $vertex->[Z] if $vertex->[Z] < $min_z;
|
|
$max_z = $vertex->[Z] if $vertex->[Z] > $max_z;
|
|
}
|
|
Slic3r::debugf "z: min = %.0f, max = %.0f\n", $min_z, $max_z;
|
|
|
|
if ($min_z == $max_z) {
|
|
Slic3r::debugf "Facet is horizontal; ignoring\n";
|
|
return;
|
|
}
|
|
|
|
# calculate the layer extents
|
|
my $min_layer = int($min_z * $Slic3r::resolution / $Slic3r::layer_height);
|
|
my $max_layer = int($max_z * $Slic3r::resolution / $Slic3r::layer_height);
|
|
Slic3r::debugf "layers: min = %s, max = %s\n", $min_layer, $max_layer;
|
|
|
|
# reorder vertices so that the first one is the one with lowest Z
|
|
# this is needed to get all intersection lines in a consistent order
|
|
# (external on the right of the line)
|
|
{
|
|
my @z_order = sort { $vertices[$a][Z] <=> $vertices[$b][Z] } 0..2;
|
|
@vertices = (splice(@vertices, $z_order[0]), splice(@vertices, 0, $z_order[0]));
|
|
}
|
|
|
|
for (my $layer_id = $min_layer; $layer_id <= $max_layer; $layer_id++) {
|
|
my $layer = $print->layer($layer_id);
|
|
$layer->add_line($_) for $self->intersect_facet(\@vertices, $layer->z);
|
|
}
|
|
}
|
|
|
|
sub intersect_facet {
|
|
my $self = shift;
|
|
my ($vertices, $z) = @_;
|
|
|
|
# build the three segments of the triangle facet
|
|
my @edges = (
|
|
[ $vertices->[0], $vertices->[1] ],
|
|
[ $vertices->[1], $vertices->[2] ],
|
|
[ $vertices->[2], $vertices->[0] ],
|
|
);
|
|
|
|
my (@lines, @intersection_points) = ();
|
|
|
|
foreach my $edge (@edges) {
|
|
my ($a, $b) = @$edge;
|
|
#printf "Az = %d, Bz = %d, z = %d\n", $a->[Z], $b->[Z], $z;
|
|
|
|
if ($a->[Z] == $b->[Z] && $a->[Z] == $z) {
|
|
# edge is horizontal and belongs to the current layer
|
|
my $edge_type = (grep $_->[Z] > $z, @$vertices) ? 'bottom' : 'top';
|
|
($a, $b) = ($b, $a) if $edge_type eq 'bottom';
|
|
push @lines, Slic3r::Line::FacetEdge->cast(
|
|
[ [$a->[X], $a->[Y]], [$b->[X], $b->[Y]] ],
|
|
edge_type => $edge_type,
|
|
);
|
|
#print "Horizontal edge!\n";
|
|
|
|
} elsif (($a->[Z] < $z && $b->[Z] > $z) || ($b->[Z] < $z && $a->[Z] > $z)) {
|
|
# edge intersects the current layer; calculate intersection
|
|
push @intersection_points, [
|
|
$b->[X] + ($a->[X] - $b->[X]) * ($z - $b->[Z]) / ($a->[Z] - $b->[Z]),
|
|
$b->[Y] + ($a->[Y] - $b->[Y]) * ($z - $b->[Z]) / ($a->[Z] - $b->[Z]),
|
|
];
|
|
#print "Intersects!\n";
|
|
|
|
} elsif ($a->[Z] == $z) {
|
|
#print "A point on plane!\n";
|
|
push @intersection_points, [ $a->[X], $a->[Y] ];
|
|
|
|
} elsif ($b->[Z] == $z) {
|
|
#print "B point on plane!\n";
|
|
push @intersection_points, [ $b->[X], $b->[Y] ];
|
|
}
|
|
}
|
|
|
|
Slic3r::Geometry::remove_coinciding_points(\@intersection_points);
|
|
|
|
if (@intersection_points > 1 && !@lines) {
|
|
|
|
# remove coinciding points
|
|
|
|
# defensive programming:
|
|
die "Facets must intersect each plane 0 or 2 times" if @intersection_points != 2;
|
|
|
|
# check whether the two points coincide due to resolution rounding
|
|
#if ($intersection_points[0]->coincides_with($intersection_points[1])) {
|
|
# Slic3r::debugf "Points coincide; removing\n";
|
|
# return;
|
|
#}
|
|
|
|
# connect points:
|
|
push @lines, Slic3r::Line->cast([ @intersection_points ]);
|
|
}
|
|
|
|
return @lines;
|
|
}
|
|
|
|
1;
|