Allow perimeters = 0. #282

README.markdown

@@ -143,7 +143,7 @@ The author is Alessandro Ranellucci (me).
                             Infill every N layers (default: 1)
       
       Print options:
-        --perimeters        Number of perimeters/horizontal skins (range: 1+, 
+        --perimeters        Number of perimeters/horizontal skins (range: 0+, 
                             default: 3)
         --solid-layers      Number of solid layers to do for top/bottom surfaces
                             (range: 1+, default: 3)

lib/Slic3r/Config.pm

@@ -554,7 +554,7 @@ sub validate {
     
     # --perimeters
     die "Invalid value for --perimeters\n"
-        if $Slic3r::perimeters < 1;
+        if $Slic3r::perimeters < 0;
     
     # --solid-layers
     die "Invalid value for --solid-layers\n"

lib/Slic3r/Perimeter.pm

@@ -11,10 +11,6 @@ sub make_perimeter {
     my ($layer) = @_;
     Slic3r::debugf "Making perimeters for layer %d\n", $layer->id;
     
-    # at least one perimeter is required
-    die "Can't slice object with no perimeters!\n"
-        if $Slic3r::perimeters == 0;
-    
     # this array will hold one arrayref per original surface (island);
     # each item of this arrayref is an arrayref representing a depth (from outer
     # perimeters to inner); each item of this arrayref is an ExPolygon:

slic3r.pl

@@ -161,7 +161,7 @@ Usage: slic3r.pl [ OPTIONS ] file.stl
                         Infill every N layers (default: $Slic3r::infill_every_layers)
   
   Print options:
-    --perimeters        Number of perimeters/horizontal skins (range: 1+, 
+    --perimeters        Number of perimeters/horizontal skins (range: 0+, 
                         default: $Slic3r::perimeters)
     --solid-layers      Number of solid layers to do for top/bottom surfaces
                         (range: 1+, default: $Slic3r::solid_layers)