Accept both relative and absolute extrusion width values. #151

README.markdown

@@ -211,9 +211,8 @@ The author is Alessandro Ranellucci.
         --notes             Notes to be added as comments to the output file
       
        Flow options (advanced):
-        --extrusion-width-ratio
-                            Calculate the extrusion width as the layer height multiplied by
-                            this value (> 0, default: calculated automatically)
+        --extrusion-width   Set extrusion width manually; it accepts either an absolute value in mm
+                            (like 0.65) or a percentage over layer height (like 200%)
         --bridge-flow-ratio Multiplier for extrusion when bridging (> 0, default: 1)
         
 

lib/Slic3r.pm

@@ -99,7 +99,7 @@ our $first_layer_height_ratio = 1;
 our $infill_every_layers    = 1;
 
 # flow options
-our $extrusion_width_ratio  = 0;
+our $extrusion_width        = 0;
 our $bridge_flow_ratio      = 1;
 our $overlap_factor         = 0.5;
 our $flow_width;

lib/Slic3r/Config.pm

@@ -198,9 +198,9 @@ our $Options = {
     },
     
     # flow options
-    'extrusion_width_ratio' => {
-        label   => 'Extrusion width (ratio over layer height; leave zero to calculate automatically)',
-        cli     => 'extrusion-width-ratio=f',
+    'extrusion_width' => {
+        label   => 'Extrusion width (mm or %; leave zero to calculate automatically)',
+        cli     => 'extrusion-width=f',
         type    => 'f',
     },
     'bridge_flow_ratio' => {
@@ -516,15 +516,22 @@ sub load {
         next if /^$/;
         next if /^\s*#/;
         /^(\w+) = (.*)/ or die "Unreadable configuration file (invalid data at line $.)\n";
-        my $key = $1;
+        my ($key, $val) = ($1, $2);
+        
+        # handle legacy options
         next if $ignore{$key};
+        if ($key eq 'extrusion_width_ratio') {
+            $key = 'extrusion_width';
+            $val = $val =~ /^\d+(\.\d+)?$/ ? ($val*100) . "%" : 0;
+        }
+        
         if (!exists $Options->{$key}) {
             $key = +(grep { $Options->{$_}{aliases} && grep $_ eq $key, @{$Options->{$_}{aliases}} }
-                keys %$Options)[0] or warn "Unknown option $1 at line $.\n";
+                keys %$Options)[0] or warn "Unknown option $key at line $.\n";
         }
         next unless $key;
         my $opt = $Options->{$key};
-        set($key, $opt->{deserialize} ? $opt->{deserialize}->($2) : $2);
+        set($key, $opt->{deserialize} ? $opt->{deserialize}->($val) : $val);
     }
     close $fh;
 }
@@ -581,8 +588,10 @@ sub validate {
     die "First layer height can't be zero or negative\n"
         if ($Slic3r::layer_height * $Slic3r::first_layer_height_ratio) <= 0;
     
-    if ($Slic3r::extrusion_width_ratio) {
-        $Slic3r::flow_width = $Slic3r::layer_height * $Slic3r::extrusion_width_ratio;
+    if ($Slic3r::extrusion_width) {
+        $Slic3r::flow_width = $Slic3r::extrusion_width =~ /^(\d+(?:\.\d+)?)%$/
+            ? ($Slic3r::layer_height * $1 / 100)
+            : $Slic3r::extrusion_width;
     } else {
         # here we calculate a sane default by matching the flow speed (at the nozzle)
         # and the feed rate

lib/Slic3r/GUI/SkeinPanel.pm

@@ -70,7 +70,7 @@ sub new {
         },
         extrusion => {
             title => 'Extrusion',
-            options => [qw(extrusion_width_ratio bridge_flow_ratio)],
+            options => [qw(extrusion_width bridge_flow_ratio)],
         },
         output => {
             title => 'Output',

lib/Slic3r/Print.pm

@@ -437,7 +437,7 @@ sub write_gcode {
     print $fh "\n" if $Slic3r::notes;
     
     for (qw(layer_height perimeters solid_layers fill_density nozzle_diameter filament_diameter
-        extrusion_multiplier perimeter_speed infill_speed travel_speed extrusion_width_ratio scale)) {
+        extrusion_multiplier perimeter_speed infill_speed travel_speed scale)) {
         printf $fh "; %s = %s\n", $_, Slic3r::Config->get($_);
     }
     printf $fh "; single wall width = %.2fmm\n", $Slic3r::flow_width;

slic3r.pl

@@ -255,9 +255,8 @@ $j
     --notes             Notes to be added as comments to the output file
   
    Flow options (advanced):
-    --extrusion-width-ratio
-                        Calculate the extrusion width as the layer height multiplied by
-                        this value (> 0, default: calculated automatically)
+    --extrusion-width   Set extrusion width manually; it accepts either an absolute value in mm
+                        (like 0.65) or a percentage over layer height (like 200%)
     --bridge-flow-ratio Multiplier for extrusion when bridging (> 0, default: $Slic3r::bridge_flow_ratio)
     
 EOF