From 67f5b7ab14b0898ed2cd04c1070d806602ac3699 Mon Sep 17 00:00:00 2001
From: Alessandro Ranellucci <aar@cpan.org>
Date: Fri, 9 Aug 2013 14:33:20 +0200
Subject: [PATCH] Require --default-acceleration when other acceleration
 settings are used

---
 lib/Slic3r/Config.pm | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/Slic3r/Config.pm b/lib/Slic3r/Config.pm
index ddf3fe6e3..a48f2f0f4 100644
--- a/lib/Slic3r/Config.pm
+++ b/lib/Slic3r/Config.pm
@@ -1385,6 +1385,11 @@ sub validate {
     die "Invalid value for --extrusion-multiplier\n"
         if defined first { $_ <= 0 } @{$self->extrusion_multiplier};
     
+    # --default-acceleration
+    die "Invalid zero value for --default-acceleration when using other acceleration settings\n"
+        if ($self->perimeter_acceleration || $self->infill_acceleration || $self->bridge_acceleration || $self->first_layer_acceleration)
+            && !$self->default_acceleration;
+    
     # general validation, quick and dirty
     foreach my $opt_key (keys %$Options) {
         my $opt = $Options->{$opt_key};