rose.rb in straightedge-0.1.2

- old
+ new

@@ -5,16 +5,22 @@
 
       def initialize(directions:{})
 	@directions = directions
       end
 
-      def project(point)
+      def orbit(point)
 	@directions.values.collect do |delta|
 	  Ruler.translate(point, delta)
 	end
       end
 
+      def orbits(points, depth: 1)
+	return if depth.zero?
+	obs = points.map(&method(:orbit)).flatten(1)
+	(obs + orbits(obs, depth: depth-1)).uniq
+      end
+
       class << self
 	def simple
 	  return @simple_rose unless @simple_rose.nil?
 	  @simple_rose = new directions: {
 	    :north => [0, -1],
@@ -23,9 +29,10 @@
 	    :west  => [-1, 0]
 	  } 
 	end
 
 	# for hex navigation (nb coords are in cube-space)
+	# TODO use for hex oriented grids
 	def hexagonal
 	  return @hex_rose unless @hex_rose.nil?
 	  @hex_rose = new directions: {
 	    :north     => [1, -1, 0],
 	    :northeast => [0, -1, 1],