Add weight/cost output to gcode. On the way to #647

lib/Slic3r/GUI/Tab.pm

@@ -962,7 +962,7 @@ sub build {
     my $self = shift;
     
     $self->init_config_options(qw(
-        filament_colour filament_diameter filament_notes filament_max_volumetric_speed extrusion_multiplier
+        filament_colour filament_diameter filament_notes filament_max_volumetric_speed extrusion_multiplier filament_density filament_cost
         temperature first_layer_temperature bed_temperature first_layer_bed_temperature
         fan_always_on cooling
         min_fan_speed max_fan_speed bridge_fan_speed disable_fan_first_layers
@@ -977,6 +977,8 @@ sub build {
             $optgroup->append_single_option_line('filament_colour', 0);
             $optgroup->append_single_option_line('filament_diameter', 0);
             $optgroup->append_single_option_line('extrusion_multiplier', 0);
+            $optgroup->append_single_option_line('filament_density', 0);
+            $optgroup->append_single_option_line('filament_cost', 0);
         }
     
         {

lib/Slic3r/Print/GCode.pm

@@ -321,17 +321,33 @@ sub export {
     $self->print->clear_filament_stats;
     $self->print->total_used_filament(0);
     $self->print->total_extruded_volume(0);
+    my $total_filament_weight = 0.0;
+    my $total_filament_cost = 0.0;
     foreach my $extruder (@{$gcodegen->writer->extruders}) {
         my $used_filament = $extruder->used_filament;
         my $extruded_volume = $extruder->extruded_volume;
+        my $filament_weight = $extruded_volume * $extruder->filament_density;
+        my $filament_cost = $filament_weight * ($extruder->filament_cost / 1000);
         $self->print->set_filament_stats($extruder->id, $used_filament);
         
         printf $fh "; filament used = %.1fmm (%.1fcm3)\n",
             $used_filament, $extruded_volume/1000;
+        if ($filament_weight > 0) {
+            $total_filament_weight += $filament_weight;
+            printf $fh "; filament used = %.1fg\n",
+                   $filament_weight;
+            if ($filament_cost > 0) {
+                $total_filament_cost += $filament_cost;
+                printf $fh "; filament cost = %.1f\n",
+                       $filament_cost;
+            }
+        }
         
         $self->print->total_used_filament($self->print->total_used_filament + $used_filament);
         $self->print->total_extruded_volume($self->print->total_extruded_volume + $extruded_volume);
     }
+    printf $fh "; total filament cost = %.1f\n",
+           $total_filament_cost;
     
     # append full config
     print $fh "\n";

xs/src/libslic3r/Extruder.cpp

@@ -111,6 +111,18 @@ Extruder::filament_diameter() const
     return this->config->filament_diameter.get_at(this->id);
 }
 
+double
+Extruder::filament_density() const
+{
+    return this->config->filament_density.get_at(this->id);
+}
+
+double
+Extruder::filament_cost() const
+{
+    return this->config->filament_cost.get_at(this->id);
+}
+
 double
 Extruder::extrusion_multiplier() const
 {

xs/src/libslic3r/Extruder.hpp

@@ -29,6 +29,8 @@ class Extruder
     double used_filament() const;
     
     double filament_diameter() const;
+    double filament_density() const;
+    double filament_cost() const;
     double extrusion_multiplier() const;
     double retract_length() const;
     double retract_lift() const;

xs/src/libslic3r/PrintConfig.cpp

@@ -335,6 +335,30 @@ PrintConfigDef::PrintConfigDef()
         opt->values.push_back(3);
         def->default_value = opt;
     }
+
+    def = this->add("filament_density", coFloats);
+    def->label = "Density";
+    def->tooltip = "Enter your filament density here. This is only for statistical information. A decent way is to weigh a known length of filament and compute the ratio of the length to volume.";
+    def->sidetext = "g/mm^3";
+    def->cli = "filament-density=f@";
+    def->min = 0;
+    {
+        ConfigOptionFloats* opt = new ConfigOptionFloats();
+        opt->values.push_back(0);
+        def->default_value = opt;
+    }
+
+    def = this->add("filament_cost", coFloats);
+    def->label = "Cost";
+    def->tooltip = "Enter your filament cost per kg here. This is only for statistical information.";
+    def->sidetext = "money/kg";
+    def->cli = "filament-cost=f@";
+    def->min = 0;
+    {
+        ConfigOptionFloats* opt = new ConfigOptionFloats();
+        opt->values.push_back(0);
+        def->default_value = opt;
+    }
     
     def = this->add("filament_settings_id", coString);
     def->default_value = new ConfigOptionString("");

xs/src/libslic3r/PrintConfig.hpp

@@ -299,6 +299,8 @@ class GCodeConfig : public virtual StaticPrintConfig
     ConfigOptionString              extrusion_axis;
     ConfigOptionFloats              extrusion_multiplier;
     ConfigOptionFloats              filament_diameter;
+    ConfigOptionFloats              filament_density;
+    ConfigOptionFloats              filament_cost;
     ConfigOptionFloats              filament_max_volumetric_speed;
     ConfigOptionBool                gcode_comments;
     ConfigOptionEnum<GCodeFlavor>   gcode_flavor;
@@ -334,6 +336,8 @@ class GCodeConfig : public virtual StaticPrintConfig
         OPT_PTR(extrusion_axis);
         OPT_PTR(extrusion_multiplier);
         OPT_PTR(filament_diameter);
+        OPT_PTR(filament_density);
+        OPT_PTR(filament_cost);
         OPT_PTR(filament_max_volumetric_speed);
         OPT_PTR(gcode_comments);
         OPT_PTR(gcode_flavor);

xs/xsp/Extruder.xsp

@@ -42,6 +42,8 @@
         %code%{ RETVAL = THIS->retract_speed_mm_min; %};
     
     double filament_diameter();
+    double filament_density();
+    double filament_cost();
     double extrusion_multiplier();
     double retract_length();
     double retract_lift();