From 6985fe462bae3dc97314808652982dd8bf28252d Mon Sep 17 00:00:00 2001
From: Josh Holtrop <josh.holtrop@gentex.com>
Date: Sun, 17 Nov 2013 18:53:54 -0500
Subject: [PATCH] correct off-by-one error on face/line indices

---
 obj2d.rb | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/obj2d.rb b/obj2d.rb
index f94b8a9..c81f3a2 100644
--- a/obj2d.rb
+++ b/obj2d.rb
@@ -29,9 +29,9 @@ def main(obj_fname, d_fname)
     elsif line =~ /^o\s+(.*)/
       raise "Do not know how to handle object #{$1.inspect}"
     elsif line =~ /^f\s+(\d+)\s+(\d+)\s+(\d+)/
-      cur_obj << [$1, $2, $3].map(&:to_i)
+      cur_obj << [$1, $2, $3].map {|v| v.to_i - 1}
     elsif line =~ /^l\s+(\d+)\s+(\d+)/
-      cur_obj << [$1, $2].map(&:to_i)
+      cur_obj << [$1, $2].map {|v| v.to_i - 1}
     end
   end
   File.open(d_fname, "w") do |fh|