polygon.rb in gull-0.4.0

- old
+ new

@@ -1,37 +1,14 @@
 module Gull
   class Polygon
     attr_accessor :coordinates
 
     def initialize(polygon)
-      self.coordinates = polygon.split(' ').collect do |coords|
-        coords.split(',').collect(&:to_f)
-      end
+      self.coordinates = polygon.split(' ')
+                                .map { |point| point.split(',').map(&:to_f) }
     end
 
-    def centroid
-      low_x = 0
-      low_y = 0
-      high_x = 0
-      high_y = 0
-
-      coordinates.each do |pair|
-        x_bounds = bounds pair.first, low_x, high_x
-        low_x = x_bounds.first
-        high_x = x_bounds.last
-
-        y_bounds = bounds pair.last, low_y, high_y
-        low_y = y_bounds.first
-        high_y = y_bounds.last
-      end
-
-      center_x = low_x + ((high_x - low_x) / 2)
-      center_y = low_y + ((high_y - low_y) / 2)
-
-      [center_x, center_y]
-    end
-
     def image_url(api_key, options = {})
       options = {
         width: 640,
         height: 640,
         color: '0xff0000',
@@ -49,22 +26,19 @@
 
     def to_s
       coordinates.map { |pair| pair.join(',') }.join(' ')
     end
 
-    private
-
-    def bounds(point, low, high)
-      if point < low || low == 0
-        low = point
-      elsif point > high || high == 0
-        high = point
-      end
-
-      [low, high]
+    # Returns well-known text (WKT) formatted polygon
+    def to_wkt
+      pairs = coordinates.map { |pair| "#{pair.last} #{pair.first}" }
+                         .join(', ')
+      "POLYGON((#{pairs}))"
     end
 
+    private
+
     def coordinates_piped
-      coordinates.collect { |pair| pair.join ',' }.join '|'
+      coordinates.map { |pair| pair.join ',' }.join '|'
     end
   end
 end