Module: RGeo::ImplHelper::BasicLineStringMethods

Included in:
Cartesian::LineImpl, Cartesian::LineStringImpl, Cartesian::LinearRingImpl, Geographic::ProjectedLineImpl, Geographic::ProjectedLineStringImpl, Geographic::ProjectedLinearRingImpl, Geographic::SphericalLineImpl, Geographic::SphericalLineStringImpl, Geographic::SphericalLinearRingImpl
Defined in:
lib/rgeo/impl_helper/basic_line_string_methods.rb

Overview

:nodoc:

Instance Method Summary collapse

Instance Method Details

#boundary ⇒ Object 


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# File 'lib/rgeo/impl_helper/basic_line_string_methods.rb', line 50

def boundary
  array = []
  array << @points.first << @points.last if !empty? && !closed?
  factory.multipoint([array])
end

#closed? ⇒ Boolean

Returns:

  • (Boolean) 

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# File 'lib/rgeo/impl_helper/basic_line_string_methods.rb', line 64

def closed?
  return @closed if defined?(@closed)

  @closed = @points.size > 2 && @points.first == @points.last
end

#contains?(rhs) ⇒ Boolean

Returns:

  • (Boolean) 

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# File 'lib/rgeo/impl_helper/basic_line_string_methods.rb', line 90

def contains?(rhs)
  if Feature::Point === rhs
    contains_point?(rhs)
  else
    raise(Error::UnsupportedOperation,
          "Method LineString#contains? is only defined for Point")
  end
end

#coordinates ⇒ Object 


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# File 'lib/rgeo/impl_helper/basic_line_string_methods.rb', line 86

def coordinates
  @points.map(&:coordinates)
end

#dimension ⇒ Object 


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# File 'lib/rgeo/impl_helper/basic_line_string_methods.rb', line 38

def dimension
  1
end

#empty? ⇒ Boolean

Returns:

  • (Boolean) 

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# File 'lib/rgeo/impl_helper/basic_line_string_methods.rb', line 46

def empty?
  @points.size == 0
end

#end_point ⇒ Object 


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# File 'lib/rgeo/impl_helper/basic_line_string_methods.rb', line 60

def end_point
  @points.last
end

#geometry_type ⇒ Object 


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# File 'lib/rgeo/impl_helper/basic_line_string_methods.rb', line 42

def geometry_type
  Feature::LineString
end

#hash ⇒ Object 


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# File 'lib/rgeo/impl_helper/basic_line_string_methods.rb', line 82

def hash
  @hash ||= [factory, geometry_type, *@points].hash
end

#initialize(factory, points) ⇒ Object

Raises:


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# File 'lib/rgeo/impl_helper/basic_line_string_methods.rb', line 12

def initialize(factory, points)
  self.factory = factory
  @points = points.map do |elem|
    elem = Feature.cast(elem, factory, Feature::Point)
    raise Error::InvalidGeometry, "Could not cast #{elem}" unless elem
    elem
  end
  # LineStrings in general need to check that there's not one point
  # GEOS doesn't allow instantiation of single point LineStrings so
  # we should handle it.
  raise Error::InvalidGeometry, "LineString Cannot Have 1 Point" if @points.size == 1
  init_geometry
end

#num_points ⇒ Object 


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# File 'lib/rgeo/impl_helper/basic_line_string_methods.rb', line 26

def num_points
  @points.size
end

#point_n(idx) ⇒ Object 


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# File 'lib/rgeo/impl_helper/basic_line_string_methods.rb', line 30

def point_n(idx)
  idx < 0 ? nil : @points[idx]
end

#points ⇒ Object 


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# File 'lib/rgeo/impl_helper/basic_line_string_methods.rb', line 34

def points
  @points.dup
end

#rep_equals?(rhs) ⇒ Boolean

Returns:

  • (Boolean) 

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# File 'lib/rgeo/impl_helper/basic_line_string_methods.rb', line 74

def rep_equals?(rhs)
  if rhs.is_a?(self.class) && rhs.factory.eql?(@factory) && @points.size == rhs.num_points
    rhs.points.each_with_index { |p, i| return false unless @points[i].rep_equals?(p) }
  else
    false
  end
end

#ring? ⇒ Boolean

Returns:

  • (Boolean) 

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# File 'lib/rgeo/impl_helper/basic_line_string_methods.rb', line 70

def ring?
  closed? && simple?
end

#start_point ⇒ Object 


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# File 'lib/rgeo/impl_helper/basic_line_string_methods.rb', line 56

def start_point
  @points.first
end