Method: RGeo::Cartesian::PointMethods#buffer

Defined in:
lib/rgeo/cartesian/feature_methods.rb

#buffer(distance) ⇒ Object 



56
57
58
59
60
61
62
63
64
 
# File 'lib/rgeo/cartesian/feature_methods.rb', line 56

def buffer(distance)
  point_count = factory.property(:buffer_resolution) * 4
  angle = -::Math::PI * 2.0 / point_count
  points = (0...point_count).map do |i|
    r = angle * i
    factory.point(@x + distance * Math.cos(r), @y + distance * Math.sin(r))
  end
  factory.polygon(factory.linear_ring(points))
end