lib/picky/calculations/location.rb in picky-0.12.3 vs lib/picky/calculations/location.rb in picky-1.0.0

@@ -1,6 +1,6 @@
-module Calculations
+module Calculations # :nodoc:all
   
   # A location calculation recalculates a 1-d location
   # to the Picky internal 1-d "grid".
   #
   # For example, if you have a location x == 12.3456,
@@ -16,10 +16,18 @@
       @precision = precision || 1
       @grid      = @user_grid / (@precision + 0.5)
     end
     
     def minimum= minimum
+      # Add a margin of 1 user grid.
+      #
       minimum -= @user_grid
+      
+      # Add plus 1 grid so that the index key never falls on 0.
+      # Why? to_i maps by default to 0.
+      #
+      minimum -= @grid
+      
       @minimum = minimum
     end
     
     #
     #
\ No newline at end of file