arc.rb in geometry-in-ruby-0.0.5

- old
+ new
@@ -11,89 +11,89 @@
 == Usage
 An {Arc} with its center at [1,1] and a radius of 2 that starts at the X-axis and goes to the Y-axis (counter-clockwise)
     arc = Geometry::Arc.new center:[1,1], radius:2, start:0, end:90
 =end
 
-    class Arc
-	include ClusterFactory
+	class Arc
+		include ClusterFactory
+		
+		attr_reader :center
+		attr_reader :radius
+		attr_reader :start_angle, :end_angle
+		attr_writer :options
+		def options
+			@options = {} if !@options
+			@options
+		end
 
-	attr_reader :center
-	attr_reader :radius
-	attr_reader :start_angle, :end_angle
-	attr_writer :options
-	def options
-		@options = {} if !@options
-		@option
+		# @overload new(center, start, end)
+		#  Create a new {Arc} given center, start and end {Point}s
+		# @option options [Point] :center (PointZero)   The {Point} at the center
+		# @option options [Point] :start    The {Arc} starts at the start {Point}
+		# @option options [Point] :end	    The {Point} where it all ends
+		# @return [Arc]
+		# @overload new(center, radius, start, end)
+		#  Create a new {Arc} given a center {Point}, a radius and start and end angles
+		# @option options [Point]   :center (PointZero)	The {Point} at the center of it all
+		# @option options [Numeric] :radius	Radius
+		# @option options [Numeric] :start	Starting angle
+		# @option options [Numeric] :end	Ending angle
+		# @return [ThreePointArc]
+		def self.new(options={})
+			center = options.delete(:center) || PointZero.new
+			
+			if options.has_key?(:radius)
+				original_new(center, options[:radius], options[:start], options[:end])
+			else
+				ThreePointArc.new(center, options[:start], options[:end])
+			end
+		end
+		
+		# Construct a new {Arc}
+		# @overload initialize(center, radius, start_angle, end_angle)
+		# @param [Point]    center	The {Point} at the center of it all
+		# @param [Numeric]  radius	Radius
+		# @param [Numeric]  start_angle	Starting angle
+		# @param [Numeric]  end_angle	Ending angle
+		def initialize(center, radius, start_angle, end_angle)
+			@center = Point[center]
+			@radius = radius
+			@start_angle = start_angle
+			@end_angle = end_angle
+		end
+		
+		# @return [Point]   The starting point of the {Arc}
+		def first
+			@center + @radius * Vector[Math.cos(@start_angle), Math.sin(@start_angle)]
+		end
+		
+		# @return [Point]   The end point of the {Arc}
+		def last
+			@center + @radius * Vector[Math.cos(@end_angle), Math.sin(@end_angle)]
+		end
 	end
 
-	# @overload new(center, start, end)
-	#  Create a new {Arc} given center, start and end {Point}s
-	# @option options [Point] :center (PointZero)   The {Point} at the center
-	# @option options [Point] :start    The {Arc} starts at the start {Point}
-	# @option options [Point] :end	    The {Point} where it all ends
-	# @return [Arc]
-	# @overload new(center, radius, start, end)
-	#  Create a new {Arc} given a center {Point}, a radius and start and end angles
-	# @option options [Point]   :center (PointZero)	The {Point} at the center of it all
-	# @option options [Numeric] :radius	Radius
-	# @option options [Numeric] :start	Starting angle
-	# @option options [Numeric] :end	Ending angle
-	# @return [ThreePointArc]
-	def self.new(options={})
-	    center = options.delete(:center) || PointZero.new
+	class ThreePointArc < Arc
+		attr_reader :center
+		attr_reader :start, :end
 
-	    if options.has_key?(:radius)
-		original_new(center, options[:radius], options[:start], options[:end])
-	    else
-		ThreePointArc.new(center, options[:start], options[:end])
-	    end
-	end
+		# Contruct a new {Arc} given center, start and end {Point}s
+		#  Always assumes that the {Arc} is counter-clockwise. Reverse the order
+		#  of the start and end points to get an {Arc} that goes around the other way.
+		# @overload initialize(center_point, start_point, end_point)
+		# @param [Point]    center_point    The {Point} at the center
+		# @param [Point]    start_point	    The {Arc} starts at the start {Point}
+		# @param [Point]    end_point	    The {Point} where it all ends
+		def initialize(center_point, start_point, end_point)
+		    @center, @start, @end = [center_point, start_point, end_point].map {|p| Point[p]}
+		    raise ArgumentError unless [@center, @start, @end].all? {|p| p.is_a?(Point)}
+		end
 
-	# Construct a new {Arc}
-	# @overload initialize(center, radius, start_angle, end_angle)
-	# @param [Point]    center	The {Point} at the center of it all
-	# @param [Numeric]  radius	Radius
-	# @param [Numeric]  start_angle	Starting angle
-	# @param [Numeric]  end_angle	Ending angle
-	def initialize(center, radius, start_angle, end_angle)
-	    @center = Point[center]
-	    @radius = radius
-	    @start_angle = start_angle
-	    @end_angle = end_angle
-	end
+		# The starting point of the {Arc}
+		# @return [Point]
+		alias :first :start
 
-	# @return [Point]   The starting point of the {Arc}
-	def first
-	    @center + @radius * Vector[Math.cos(@start_angle), Math.sin(@start_angle)]
+		# The end point of the {Arc}
+		# @return [Point]
+		alias :last :end
 	end
-
-	# @return [Point]   The end point of the {Arc}
-	def last
-	    @center + @radius * Vector[Math.cos(@end_angle), Math.sin(@end_angle)]
-	end
-    end
-
-    class ThreePointArc < Arc
-	attr_reader :center
-	attr_reader :start, :end
-
-	# Contruct a new {Arc} given center, start and end {Point}s
-	#  Always assumes that the {Arc} is counter-clockwise. Reverse the order
-	#  of the start and end points to get an {Arc} that goes around the other way.
-	# @overload initialize(center_point, start_point, end_point)
-	# @param [Point]    center_point    The {Point} at the center
-	# @param [Point]    start_point	    The {Arc} starts at the start {Point}
-	# @param [Point]    end_point	    The {Point} where it all ends
-	def initialize(center_point, start_point, end_point)
-	    @center, @start, @end = [center_point, start_point, end_point].map {|p| Point[p]}
-	    raise ArgumentError unless [@center, @start, @end].all? {|p| p.is_a?(Point)}
-	end
-
-	# The starting point of the {Arc}
-	# @return [Point]
-	alias :first :start
-
-	# The end point of the {Arc}
-	# @return [Point]
-	alias :last :end
-    end
 end