59 lines
1.9 KiB
Perl
59 lines
1.9 KiB
Perl
package Slic3r::Flow;
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use Moo;
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use Slic3r::Geometry qw(PI);
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has 'nozzle_diameter' => (is => 'ro', required => 1);
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has 'layer_height' => (is => 'ro', default => sub { $Slic3r::layer_height });
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has 'width' => (is => 'rwp', builder => 1);
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has 'spacing' => (is => 'lazy');
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sub BUILD {
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my $self = shift;
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if ($self->width =~ /^(\d+(?:\.\d+)?)%$/) {
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$self->_set_width($self->layer_height * $1 / 100);
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}
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$self->_set_width($self->_build_width) if $self->width == 0; # auto
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}
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sub _build_width {
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my $self = shift;
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# here we calculate a sane default by matching the flow speed (at the nozzle) and the feed rate
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my $volume = ($self->nozzle_diameter**2) * PI/4;
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my $shape_threshold = $self->nozzle_diameter * $self->layer_height + ($self->layer_height**2) * PI/4;
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my $width;
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if ($volume >= $shape_threshold) {
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# rectangle with semicircles at the ends
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$width = (($self->nozzle_diameter**2) * PI + ($self->layer_height**2) * (4 - PI)) / (4 * $self->layer_height);
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} else {
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# rectangle with squished semicircles at the ends
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$width = $self->nozzle_diameter * ($self->nozzle_diameter/$self->layer_height - 4/PI + 1);
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}
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my $min = $self->nozzle_diameter * 1.05;
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my $max = $self->nozzle_diameter * 1.4;
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$width = $max if $width > $max;
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$width = $min if $width < $min;
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return $width;
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}
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sub _build_spacing {
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my $self = shift;
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my $min_flow_spacing;
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if ($self->width >= ($self->nozzle_diameter + $self->layer_height)) {
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# rectangle with semicircles at the ends
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$min_flow_spacing = $self->width - $self->layer_height * (1 - PI/4);
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} else {
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# rectangle with shrunk semicircles at the ends
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$min_flow_spacing = $self->nozzle_diameter * (1 - PI/4) + $self->width * PI/4;
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}
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return $self->width - $Slic3r::overlap_factor * ($self->width - $min_flow_spacing);
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}
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1;
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