lib/physical/box.rb in physical-0.1.4 vs lib/physical/box.rb in physical-0.2.0

@@ -3,7 +3,29 @@
 require 'measured'
 
 module Physical
   class Box < Cuboid
     DEFAULT_LENGTH = BigDecimal::INFINITY
+    attr_reader :inner_dimensions,
+                :inner_length,
+                :inner_width,
+                :inner_height
+
+    def initialize(inner_dimensions: [], **args)
+      super args
+      @inner_dimensions = fill_dimensions(Types::Dimensions[inner_dimensions])
+      @inner_length, @inner_width, @inner_height = *@inner_dimensions.reverse
+    end
+
+    alias :inner_x :inner_length
+    alias :inner_y :inner_width
+    alias :inner_z :inner_height
+    alias :inner_depth :inner_height
+
+    def inner_volume
+      Measured::Volume(
+        inner_dimensions.map { |d| d.convert_to(:cm).value }.reduce(1, &:*),
+        :ml
+      )
+    end
   end
 end