Use Douglas-Peucker simplification always and remove the inefficient parallel lines merging algorithm. #277

lib/Slic3r.pm

@@ -81,6 +81,7 @@ our $infill_acceleration    = 50;   # mm/s^2
 
 # accuracy options
 our $scaling_factor         = 0.00000001;
+our $resolution             = 0.01;
 our $small_perimeter_area   = ((6.5 / $scaling_factor)**2)*PI;
 our $layer_height           = 0.4;
 our $first_layer_height_ratio = 1;

lib/Slic3r/Layer.pm

@@ -112,6 +112,7 @@ sub make_surfaces {
     {
         # merge everything
         my $expolygons = union_ex($loops);
+        $_->simplify(scale $Slic3r::resolution) for @$expolygons;
         
         Slic3r::debugf "  %d surface(s) having %d holes detected from %d polylines\n",
             scalar(@$expolygons), scalar(map $_->holes, @$expolygons), scalar(@$loops);

lib/Slic3r/TriangleMesh.pm

@@ -267,7 +267,6 @@ sub make_loops {
         Slic3r::debugf "  Discovered %s polygon of %d points\n",
             ($polygons[-1]->is_counter_clockwise ? 'ccw' : 'cw'), scalar(@points)
             if $Slic3r::debug;
-        pop @polygons if !$polygons[-1]->cleanup;
     }
     
     return [@polygons];