232 lines
6.6 KiB
Perl
232 lines
6.6 KiB
Perl
package Slic3r::TriangleMesh;
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use Moo;
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use List::Util qw(reduce min max first);
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use Slic3r::Geometry qw(X Y Z A B unscale same_point);
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use Slic3r::Geometry::Clipper qw(union_ex offset);
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use Storable;
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# public
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has 'vertices' => (is => 'ro', required => 1); # id => [$x,$y,$z]
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has 'facets' => (is => 'ro', required => 1); # id => [ $v1_id, $v2_id, $v3_id ]
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# private
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has 'edges' => (is => 'rw'); # id => [ $v1_id, $v2_id ]
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has 'facets_edges' => (is => 'rw'); # id => [ $e1_id, $e2_id, $e3_id ]
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has 'edges_facets' => (is => 'rw'); # id => [ $f1_id, $f2_id, (...) ]
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use constant MIN => 0;
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use constant MAX => 1;
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sub analyze {
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my $self = shift;
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return if defined $self->edges;
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$self->edges([]);
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$self->facets_edges([]);
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$self->edges_facets([]);
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my %table = (); # edge_coordinates => edge_id
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my $vertices = $self->vertices; # save method calls
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for (my $facet_id = 0; $facet_id <= $#{$self->facets}; $facet_id++) {
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my $facet = $self->facets->[$facet_id];
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$self->facets_edges->[$facet_id] = [];
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# reorder vertices so that the first one is the one with lowest Z
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# this is needed to get all intersection lines in a consistent order
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# (external on the right of the line)
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{
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my $lowest_vertex_idx = reduce {
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$vertices->[ $facet->[$a] ][Z] < $vertices->[ $facet->[$b] ][Z] ? $a : $b
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} -3 .. -1;
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@$facet[-3..-1] = (@$facet[$lowest_vertex_idx..-1], @$facet[-3..($lowest_vertex_idx-1)]);
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}
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# ignore the normal if provided
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my @vertices = @$facet[-3..-1];
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foreach my $edge ($self->_facet_edges($facet_id)) {
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my $edge_coordinates = join ';', sort @$edge;
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my $edge_id = $table{$edge_coordinates};
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if (!defined $edge_id) {
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# Note that the order of vertices in $self->edges is *casual* because it is only
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# good for one of the two adjacent facets. For this reason, it must not be used
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# when dealing with single facets.
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push @{$self->edges}, $edge;
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$edge_id = $#{$self->edges};
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$table{$edge_coordinates} = $edge_id;
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$self->edges_facets->[$edge_id] = [];
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}
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push @{$self->facets_edges->[$facet_id]}, $edge_id;
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push @{$self->edges_facets->[$edge_id]}, $facet_id;
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}
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}
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}
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sub merge {
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my $class = shift;
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my @meshes = @_;
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my $vertices = [];
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my $facets = [];
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foreach my $mesh (@meshes) {
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my $v_offset = @$vertices;
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push @$vertices, @{$mesh->vertices};
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push @$facets, map {
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my $f = [@$_];
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$f->[$_] += $v_offset for -3..-1;
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$f;
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} @{$mesh->facets};
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}
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return $class->new(vertices => $vertices, facets => $facets);
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}
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sub clone {
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Storable::dclone($_[0])
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}
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sub check_manifoldness {
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my $self = shift;
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$self->analyze;
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# look for any edges belonging to an odd number of facets
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# we should actually check that each pair of facets belonging to this edge
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# has compatible winding order
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my ($first_bad_edge_id) =
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grep { @{ $self->edges_facets->[$_] } % 2 } 0..$#{$self->edges_facets};
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if (defined $first_bad_edge_id) {
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warn sprintf "Warning: The input file contains a hole near edge %f,%f,%f-%f,%f,%f (not manifold). "
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. "You might want to repair it and retry, or to check the resulting G-code before printing anyway.\n",
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map @{$self->vertices->[$_]}, @{$self->edges->[$first_bad_edge_id]};
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return 0;
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}
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# empty the edges array as we don't really need it anymore
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@{$self->edges} = ();
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return 1;
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}
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sub rotate {
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my $self = shift;
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my ($deg, $center) = @_;
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return if $deg == 0;
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my $rad = Slic3r::Geometry::deg2rad($deg);
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# transform vertex coordinates
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foreach my $vertex (@{$self->vertices}) {
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@$vertex = (@{ +(Slic3r::Geometry::rotate_points($rad, $center, [ $vertex->[X], $vertex->[Y] ]))[0] }, $vertex->[Z]);
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}
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}
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sub scale {
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my $self = shift;
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my ($factor) = @_;
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return if $factor == 1;
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# transform vertex coordinates
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foreach my $vertex (@{$self->vertices}) {
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$vertex->[$_] *= $factor for X,Y,Z;
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}
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}
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sub scale_xyz {
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my $self = shift;
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my ($versor) = @_;
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# transform vertex coordinates
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foreach my $vertex (@{$self->vertices}) {
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$vertex->[$_] *= $versor->[$_] for X,Y,Z;
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}
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}
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sub move {
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my $self = shift;
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my (@shift) = @_;
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# transform vertex coordinates
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foreach my $vertex (@{$self->vertices}) {
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$vertex->[$_] += $shift[$_] || 0 for X,Y,Z;
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}
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}
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sub align_to_origin {
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my $self = shift;
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# calculate the displacements needed to
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# have lowest value for each axis at coordinate 0
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my $bb = $self->bounding_box;
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$self->move(map -$bb->extents->[$_][MIN], X,Y,Z);
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}
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sub center_around_origin {
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my $self = shift;
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$self->move(map -$_, @{ $self->center });
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}
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sub center {
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my $self = shift;
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return $self->bounding_box->center;
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}
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sub duplicate {
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my $self = shift;
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my (@shifts) = @_;
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my @new_facets = ();
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foreach my $facet (@{$self->facets}) {
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# transform vertex coordinates
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my ($normal, @vertices) = @$facet;
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foreach my $shift (@shifts) {
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push @new_facets, [ $normal ];
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foreach my $vertex (@vertices) {
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push @{$self->vertices}, [ map $self->vertices->[$vertex][$_] + ($shift->[$_] || 0), (X,Y,Z) ];
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push @{$new_facets[-1]}, $#{$self->vertices};
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}
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}
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}
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push @{$self->facets}, @new_facets;
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$self->BUILD;
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}
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sub used_vertices {
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my $self = shift;
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return [ map $self->vertices->[$_], map @$_, @{$self->facets} ];
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}
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sub bounding_box {
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my $self = shift;
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return Slic3r::Geometry::BoundingBox->new_from_points_3D($self->used_vertices);
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}
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sub size {
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my $self = shift;
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return $self->bounding_box->size;
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}
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# this will return *scaled* expolygons, so it is expected to be run
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# on unscaled meshes
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sub horizontal_projection {
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my $self = shift;
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my @f = ();
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foreach my $facet (@{$self->facets}) {
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push @f, Slic3r::Polygon->new(
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map [ map $_ / &Slic3r::SCALING_FACTOR, @{$self->vertices->[$_]}[X,Y] ], @$facet
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);
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}
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$_->make_counter_clockwise for @f; # do this after scaling, as winding order might change while doing that
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# the offset factor was tuned using groovemount.stl
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return union_ex(offset(\@f, Slic3r::Geometry::scale 0.01), 1);
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}
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1;
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