lib/IFMapper/Room.rb in ifmapper-0.7 vs lib/IFMapper/Room.rb in ifmapper-0.8

@@ -82,9 +82,12 @@
       raise "next_to?(b): #{b} is not a room."
     end
     if self == b
       raise "next_to? comparing same room #{self}"
     end
+    if b.x == @x and b.y == @y
+      raise "#{self} and #{b} in same location."
+    end
     dx = (b.x - @x)
     dy = (b.y - @y)
     return nil if dx.abs > 1 or dy.abs > 1
     return vector_to_dir(dx, dy)
   end