Module: RGeo::Geographic::SphericalLineStringMethods

Included in:
SphericalLineImpl, SphericalLineStringImpl, SphericalLinearRingImpl
Defined in:
lib/rgeo/geographic/spherical_feature_methods.rb

Overview

:nodoc:

Instance Method Summary collapse

Instance Method Details

#arcs ⇒ Object 


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# File 'lib/rgeo/geographic/spherical_feature_methods.rb', line 94

def arcs
  @arcs ||= (0..num_points - 2).map do |i|
    SphericalMath::ArcXYZ.new(point_n(i).xyz, point_n(i + 1).xyz)
  end
end

#is_simple? ⇒ Boolean

Returns:

  • (Boolean) 

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# File 'lib/rgeo/geographic/spherical_feature_methods.rb', line 100

def is_simple?
  len = arcs.length
  return false if arcs.any?(&:degenerate?)
  return true if len == 1
  return arcs[0].s != arcs[1].e if len == 2
  arcs.each_with_index do |arc, index|
    nindex = index + 1
    nindex = nil if nindex == len
    return false if nindex && arc.contains_point?(arcs[nindex].e)
    pindex = index - 1
    pindex = nil if pindex < 0
    return false if pindex && arc.contains_point?(arcs[pindex].s)
    next unless nindex
    oindex = nindex + 1
    while oindex < len
      oarc = arcs[oindex]
      return false if !(index == 0 && oindex == len - 1 && arc.s == oarc.e) && arc.intersects_arc?(oarc)
      oindex += 1
    end
  end
  true
end

#length ⇒ Object 


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# File 'lib/rgeo/geographic/spherical_feature_methods.rb', line 123

def length
  arcs.inject(0.0) { |sum, arc| sum + arc.length } * SphericalMath::RADIUS
end