From 81085433fd0c70b9a2566dedd46a6bd8bf398ded Mon Sep 17 00:00:00 2001
From: Alessandro Ranellucci <aar@cpan.org>
Date: Mon, 26 Sep 2011 16:58:08 +0200
Subject: [PATCH] New options to multiply input object

---
 README.markdown   |  3 +--
 lib/Slic3r.pm     |  3 +++
 lib/Slic3r/STL.pm | 22 +++++++++++++++++++++-
 slic3r.pl         | 18 ++++++++++++++++++
 4 files changed, 43 insertions(+), 3 deletions(-)

diff --git a/README.markdown b/README.markdown
index b637f2196..180d05528 100644
--- a/README.markdown
+++ b/README.markdown
@@ -37,7 +37,7 @@ Slic3r current features are:
 * use relative or absolute extrusion commands;
 * center print around bed center point;
 * multiple solid layers near horizontal external surfaces;
-* ability to scale and rotate input object;
+* ability to scale, rotate and multiply input object;
 * use different speed for bottom layer.
 
 Roadmap includes the following goals:
@@ -46,7 +46,6 @@ Roadmap includes the following goals:
 * allow the user to customize initial and final GCODE commands;
 * support material for internal perimeters;
 * ability to infill in the direction of bridges;
-* multiply input object;
 * cool;
 * nice packaging for cross-platform deployment.
 
diff --git a/lib/Slic3r.pm b/lib/Slic3r.pm
index c139676cd..9f2cc2132 100644
--- a/lib/Slic3r.pm
+++ b/lib/Slic3r.pm
@@ -64,5 +64,8 @@ our $skirt_distance     = 6;    # mm
 # transform options
 our $scale              = 1;
 our $rotate             = 0;
+our $multiply_x         = 1;
+our $multiply_y         = 1;
+our $multiply_distance  = 6;    # mm
 
 1;
diff --git a/lib/Slic3r/STL.pm b/lib/Slic3r/STL.pm
index 97b02a2e0..f48f0c97f 100644
--- a/lib/Slic3r/STL.pm
+++ b/lib/Slic3r/STL.pm
@@ -47,6 +47,20 @@ sub parse_file {
         $extents[$_][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,
@@ -67,7 +81,13 @@ sub parse_file {
                 for X,Y,Z;
         }
         
-        $self->_facet($print, @$facet);
+        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);
+        }
     }
     
     print "\n==> PROCESSING SLICES:\n";
diff --git a/slic3r.pl b/slic3r.pl
index 6b79c3790..eb3944c25 100755
--- a/slic3r.pl
+++ b/slic3r.pl
@@ -56,6 +56,9 @@ GetOptions(
     # transform options
     'scale=i'               => \$Slic3r::scale,
     'rotate=i'              => \$Slic3r::rotate,
+    'multiply-x=i'          => \$Slic3r::multiply_x,
+    'multiply-y=i'          => \$Slic3r::multiply_y,
+    'multiply-distance=i'   => \$Slic3r::multiply_distance,
 );
 
 # validate configuration
@@ -100,6 +103,18 @@ GetOptions(
     # --scale
     die "Invalid value for --scale\n"
         if $Slic3r::scale <= 0;
+    
+    # --multiply-x
+    die "Invalid value for --multiply-x\n"
+        if $Slic3r::multiply_x < 1;
+    
+    # --multiply-y
+    die "Invalid value for --multiply-y\n"
+        if $Slic3r::multiply_y < 1;
+    
+    # --multiply-distance
+    die "Invalid value for --multiply-distance\n"
+        if $Slic3r::multiply_distance < 1;
 }
 
 my $stl_parser = Slic3r::STL->new;
@@ -186,6 +201,9 @@ Usage: slic3r.pl [ OPTIONS ] file.stl
    Transform options:
     --scale             Factor for scaling input object (default: $Slic3r::scale)
     --rotate            Rotation angle in degrees (0-360, default: $Slic3r::rotate)
+    --multiply-x        Number of items along X axis (1+, default: $Slic3r::multiply_x)
+    --multiply-y        Number of items along Y axis (1+, default: $Slic3r::multiply_y)
+    --multiply-distance Distance in mm between copies (default: $Slic3r::multiply_distance)
     
 EOF
     exit ($exit_code || 0);