Class: GeoRuby::SimpleFeatures::LinearRing

Inherits:
LineString
  • Object
show all
Defined in:
lib/georuby-extras.rb

Instance Method Summary collapse

Instance Method Details

#fast_contains?(point) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/georuby-extras.rb', line 28

def fast_contains?(point)
  !!PointInPoly.point_in_poly(point.x.to_f, point.y.to_f, points)
end

#slow_contains?(point_to_check) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/georuby-extras.rb', line 32

def slow_contains?(point_to_check)
  c = 0
  last = points[points.length - 1]

  points.each do |point|
    if (point.y > point_to_check.y) != (last.y > point_to_check.y)
      c += 1 if point_to_check.x < (last.x - point.x) * (point_to_check.y - point.y) / (last.y / point.y) + point.x
    end
    last = point
  end
  ((c % 2) == 1) 
end