Class: GeoRuby::SimpleFeatures::LineString::Segment

Inherits:
Object
  • Object
show all
Defined in:
lib/georuby-ext/georuby/locators.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(departure, arrival) ⇒ Segment

Returns a new instance of Segment.



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# File 'lib/georuby-ext/georuby/locators.rb', line 123

def initialize(departure, arrival)
  @departure, @arrival = departure, arrival
end

Instance Attribute Details

#arrival ⇒ Object (readonly)

Returns the value of attribute arrival.



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# File 'lib/georuby-ext/georuby/locators.rb', line 121

def arrival
  @arrival
end

#departure ⇒ Object (readonly)

Returns the value of attribute departure.



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# File 'lib/georuby-ext/georuby/locators.rb', line 121

def departure
  @departure
end

#line ⇒ Object

Returns the value of attribute line.



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# File 'lib/georuby-ext/georuby/locators.rb', line 127

def line
  @line
end

#line_distance_at_departure ⇒ Object

Returns the value of attribute line_distance_at_departure.



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# File 'lib/georuby-ext/georuby/locators.rb', line 127

def line_distance_at_departure
  @line_distance_at_departure
end

Instance Method Details

#distance ⇒ Object 



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# File 'lib/georuby-ext/georuby/locators.rb', line 147

def distance
  @distance ||= departure.spherical_distance(arrival)
end

#interpolate_point(location) ⇒ Object 



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# File 'lib/georuby-ext/georuby/locators.rb', line 155

def interpolate_point(location)
  dx, dy = 
    (arrival.x - departure.x)*location, (arrival.y - departure.y)*location
  GeoRuby::SimpleFeatures::Point.from_x_y departure.x + dx, departure.y + dy, line.srid
end

#line_distance_at_arrival ⇒ Object 



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# File 'lib/georuby-ext/georuby/locators.rb', line 129

def line_distance_at_arrival
  line_distance_at_departure + distance
end

#location_in_line ⇒ Object 



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# File 'lib/georuby-ext/georuby/locators.rb', line 137

def location_in_line
  if line and line_distance_at_departure
    line_distance_at_departure / line.distance
  end
end

#locator(target) ⇒ Object 



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# File 'lib/georuby-ext/georuby/locators.rb', line 133

def locator(target)
  PointLocator.new target, self
end

#square_of_distance ⇒ Object 



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# File 'lib/georuby-ext/georuby/locators.rb', line 143

def square_of_distance
  distance**2
end

#to_s ⇒ Object 



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# File 'lib/georuby-ext/georuby/locators.rb', line 151

def to_s
  "#{departure.x},#{departure.y}..#{arrival.x},#{arrival.y}"
end