lib/terraformer/line_string.rb in terraformer-0.0.1 vs lib/terraformer/line_string.rb in terraformer-0.0.2

@@ -4,8 +4,83 @@
 
     def first_coordinate
       coordinates[0]
     end
 
+    def linear_ring?
+      coordinates.length > 3 and coordinates.first == coordinates.last
+    end
+
+    def lines
+      ls = []
+      coordinates.each_cons(2) {|l| ls << l}
+      ls
+    end
+
+    def contains? obj
+      case obj
+      when Point
+        lines.any? {|l| Geometry.line_contains_point? l, obj.coordinates}
+      when LineString
+        self == obj or coordinates.slice_exists? obj.coordinates
+        # todo this does not case for a line string of different coordinates
+        #      that is actually contained yet
+      when MultiLineString
+        obj.line_strings.all? {|ls| ls.within? self}
+      else
+        raise ArgumentError.new "unsupported type: #{obj.type rescue obj.class}"
+      end
+    end
+
+    def within? obj
+      case obj
+      when LineString
+        self == obj or obj.coordinates.slice_exists? coordinates
+        # todo this does not case for a line string of different coordinates
+        #      that is actually contained yet
+      when MultiLineString
+        obj.line_strings.any? {|ls| ls.contains? self}
+      when Polygon
+        obj.contains? self
+      when MultiPolygon
+        obj.polygons.any? {|p| p.contains? self}
+      else
+        raise ArgumentError.new "unsupported type: #{obj.type rescue obj.class}"
+      end
+    end
+
+    def points
+      coordinates.map &:to_point
+    end
+    alias_method :vertices, :points
+
+    def point_at idx
+      coordinates[idx].to_point
+    end
+    alias_method :vertex_at, :point_at
+
+    def add_vertex p
+      p = p.coordinates if Point === p
+      raise ArgumentError unless Coordinate === p
+      coordinates << p
+    end
+    alias_method :<<, :add_vertex
+
+    def insert_vertex idx, p
+      p = p.coordinates if Point === p
+      raise ArgumentError unless Coordinate === p
+      coordinates.insert idx, p
+    end
+
+    def remove_vertex p
+      p = p.coordinates if Point === p
+      raise ArgumentError unless Coordinate === p
+      coordinates.delete p
+    end
+
+    def remove_vertex_at idx
+      coordinates.delete_at idx
+    end
+
   end
 
 end