From dccd7d19a9421c26181fb7fceccc5b9f647f8cd2 Mon Sep 17 00:00:00 2001
From: Alessandro Ranellucci <aar@cpan.org>
Date: Sun, 26 Feb 2012 14:54:38 +0100
Subject: [PATCH] First layer temperature. #134

---
 README.markdown              |  2 ++
 lib/Slic3r.pm                |  1 +
 lib/Slic3r/Config.pm         |  6 ++++++
 lib/Slic3r/GUI/SkeinPanel.pm |  2 +-
 lib/Slic3r/Print.pm          | 10 ++++++++--
 slic3r.pl                    |  2 ++
 6 files changed, 20 insertions(+), 3 deletions(-)

diff --git a/README.markdown b/README.markdown
index 9c79563f..1ec4245d 100644
--- a/README.markdown
+++ b/README.markdown
@@ -115,6 +115,8 @@ The author is Alessandro Ranellucci (me).
                             very little need to change this value, which is only useful to 
                             compensate for filament packing (default: 1)
         --temperature       Extrusion temperature in degree Celsius, set 0 to disable (default: 200)
+        --first-layer-temperature Extrusion temperature for the first layer, in degree Celsius,
+                            set 0 to disable (default: same as --temperature)
         
       Speed options:
         --travel-speed      Speed of non-print moves in mm/s (default: 130)
diff --git a/lib/Slic3r.pm b/lib/Slic3r.pm
index bb2c1ac8..8e23c1b7 100644
--- a/lib/Slic3r.pm
+++ b/lib/Slic3r.pm
@@ -61,6 +61,7 @@ our $gcode_comments     = 0;
 our $filament_diameter  = 3;    # mm
 our $extrusion_multiplier = 1;
 our $temperature        = 200;
+our $first_layer_temperature;
 
 # speed options
 our $travel_speed           = 130;  # mm/s
diff --git a/lib/Slic3r/Config.pm b/lib/Slic3r/Config.pm
index dff00f01..c73310d8 100644
--- a/lib/Slic3r/Config.pm
+++ b/lib/Slic3r/Config.pm
@@ -91,6 +91,11 @@ our $Options = {
         type    => 'f',
         aliases => [qw(filament_packing_density)],
     },
+    'first_layer_temperature' => {
+        label   => 'First layer temperature (°C)',
+        cli     => 'fisrt-layer-temperature=i',
+        type    => 'i',
+    },
     'temperature' => {
         label   => 'Temperature (°C)',
         cli     => 'temperature=i',
@@ -594,6 +599,7 @@ sub validate {
     $Slic3r::small_perimeter_speed ||= $Slic3r::perimeter_speed;
     $Slic3r::bridge_speed ||= $Slic3r::infill_speed;
     $Slic3r::solid_infill_speed ||= $Slic3r::infill_speed;
+    $Slic3r::first_layer_temperature //= $Slic3r::temperature; #/
 }
 
 1;
diff --git a/lib/Slic3r/GUI/SkeinPanel.pm b/lib/Slic3r/GUI/SkeinPanel.pm
index 6714933a..33033787 100644
--- a/lib/Slic3r/GUI/SkeinPanel.pm
+++ b/lib/Slic3r/GUI/SkeinPanel.pm
@@ -25,7 +25,7 @@ sub new {
         },
         filament => {
             title => 'Filament',
-            options => [qw(filament_diameter extrusion_multiplier temperature)],
+            options => [qw(filament_diameter extrusion_multiplier temperature first_layer_temperature)],
         },
         print_speed => {
             title => 'Print speed',
diff --git a/lib/Slic3r/Print.pm b/lib/Slic3r/Print.pm
index 753c971a..72e9cfcc 100644
--- a/lib/Slic3r/Print.pm
+++ b/lib/Slic3r/Print.pm
@@ -587,8 +587,8 @@ sub export_gcode {
     
     # write start commands to file
     printf $fh "M104 %s%d ; set temperature\n",
-        ($Slic3r::gcode_flavor eq 'mach3' ? 'P' : 'S'), $Slic3r::temperature
-            if $Slic3r::temperature;
+        ($Slic3r::gcode_flavor eq 'mach3' ? 'P' : 'S'), $Slic3r::first_layer_temperature
+            if $Slic3r::first_layer_temperature;
     print  $fh "$Slic3r::start_gcode\n";
     printf $fh "M109 %s%d ; wait for temperature to be reached\n", 
         ($Slic3r::gcode_flavor eq 'mach3' ? 'P' : 'S'), $Slic3r::temperature
@@ -622,6 +622,12 @@ sub export_gcode {
     
     # write gcode commands layer by layer
     foreach my $layer (@{ $self->layers }) {
+        if ($layer->id == 1) {
+            printf $fh "M104 %s%d ; set temperature\n",
+                ($Slic3r::gcode_flavor eq 'mach3' ? 'P' : 'S'), $Slic3r::temperature
+                if $Slic3r::temperature && $Slic3r::temperature != $Slic3r::first_layer_temperature;
+        }
+        
         # go to layer
         print $fh $extruder->change_layer($layer);
         
diff --git a/slic3r.pl b/slic3r.pl
index eeef4cbc..bc10c95e 100755
--- a/slic3r.pl
+++ b/slic3r.pl
@@ -133,6 +133,8 @@ Usage: slic3r.pl [ OPTIONS ] file.stl
                         very little need to change this value, which is only useful to 
                         compensate for filament packing (default: $Slic3r::extrusion_multiplier)
     --temperature       Extrusion temperature in degree Celsius, set 0 to disable (default: $Slic3r::temperature)
+    --first-layer-temperature Extrusion temperature for the first layer, in degree Celsius,
+                        set 0 to disable (default: same as --temperature)
     
   Speed options:
     --travel-speed      Speed of non-print moves in mm/s (default: $Slic3r::travel_speed)