New command line option: --dont-arrange

Don't arrange the objects on the build plate. The model coordinates
define the absolute positions on the build plate.
The option --print-center will be ignored.

Also there is a fix in the command line invocation of --duplicate-grid
so it will run, but still there is something broken there and the results
are not correct.

README.md

@@ -322,6 +322,9 @@ The author of the Silk icon set is Mark James.
         --duplicate         Number of items with auto-arrange (1+, default: 1)
         --duplicate-grid    Number of items with grid arrangement (default: 1,1)
         --duplicate-distance Distance in mm between copies (default: 6)
+        --dont-arrange      Don't arrange the objects on the build plate. The model coordinates
+                            define the absolute positions on the build plate. 
+                            The option --print-center will be ignored.
         --xy-size-compensation
                             Grow/shrink objects by the configured absolute distance (mm, default: 0)
 

lib/Slic3r/Print/Simple.pm

@@ -41,6 +41,11 @@ has 'print_center' => (
     default => sub { Slic3r::Pointf->new(100,100) },
 );
 
+has 'dont_arrange' => (
+    is      => 'rw',
+    default => sub { 0 },
+);
+
 has 'output_file' => (
     is      => 'rw',
 );
@@ -52,7 +57,7 @@ sub set_model {
     $self->_print->clear_objects;
 
     # make sure all objects have at least one defined instance
-    my $need_arrange = $model->add_default_instances;
+    my $need_arrange = $model->add_default_instances && ! $self->dont_arrange;
 
     # apply scaling and rotation supplied from command line if any
     foreach my $instance (map @{$_->instances}, @{$model->objects}) {
@@ -61,15 +66,15 @@ sub set_model {
     }
 
     if ($self->duplicate_grid->[X] > 1 || $self->duplicate_grid->[Y] > 1) {
-        $model->duplicate_objects_grid($self->duplicate_grid, $self->_print->config->duplicate_distance);
+        $model->duplicate_objects_grid($self->duplicate_grid->[X], $self->duplicate_grid->[Y], $self->_print->config->duplicate_distance);
     } elsif ($need_arrange) {
         $model->duplicate_objects($self->duplicate, $self->_print->config->min_object_distance);
     } elsif ($self->duplicate > 1) {
         # if all input objects have defined position(s) apply duplication to the whole model
         $model->duplicate($self->duplicate, $self->_print->config->min_object_distance);
     }
     $_->translate(0,0,-$_->bounding_box->z_min) for @{$model->objects};
-    $model->center_instances_around_point($self->print_center);
+    $model->center_instances_around_point($self->print_center) if (! $self->dont_arrange);
 
     foreach my $model_object (@{$model->objects}) {
         $self->_print->auto_assign_extruders($model_object);

slic3r.pl

@@ -48,6 +48,7 @@ BEGIN
         'duplicate=i'           => \$opt{duplicate},
         'duplicate-grid=s'      => \$opt{duplicate_grid},
         'print-center=s'        => \$opt{print_center},
+        'dont-arrange'          => \$opt{dont_arrange},
     );
     foreach my $opt_key (keys %{$Slic3r::Config::Options}) {
         my $cli = $Slic3r::Config::Options->{$opt_key}->{cli} or next;
@@ -204,6 +205,7 @@ BEGIN
             duplicate       => $opt{duplicate}      // 1,
             duplicate_grid  => $opt{duplicate_grid} // [1,1],
             print_center    => $opt{print_center}   // Slic3r::Pointf->new(100,100),
+            dont_arrange    => $opt{dont_arrange}   // 0,
             status_cb       => sub {
                 my ($percent, $message) = @_;
                 printf "=> %s\n", $message;
@@ -485,6 +487,9 @@ sub usage {
     --duplicate         Number of items with auto-arrange (1+, default: 1)
     --duplicate-grid    Number of items with grid arrangement (default: 1,1)
     --duplicate-distance Distance in mm between copies (default: $config->{duplicate_distance})
+    --dont-arrange      Don't arrange the objects on the build plate. The model coordinates
+                        define the absolute positions on the build plate. 
+                        The option --print-center will be ignored.
     --xy-size-compensation
                         Grow/shrink objects by the configured absolute distance (mm, default: $config->{xy_size_compensation})