Class: Geos::Polygon

Inherits:
Geometry show all
Defined in:
lib/ffi-geos/polygon.rb

Constant Summary

Constants included from GeomTypes

GeomTypes::GEOS_GEOMETRYCOLLECTION, GeomTypes::GEOS_LINEARRING, GeomTypes::GEOS_LINESTRING, GeomTypes::GEOS_MULTILINESTRING, GeomTypes::GEOS_MULTIPOINT, GeomTypes::GEOS_MULTIPOLYGON, GeomTypes::GEOS_POINT, GeomTypes::GEOS_POLYGON

Instance Attribute Summary

Attributes inherited from Geometry

#ptr

Instance Method Summary collapse

Methods inherited from Geometry

#==, #area, #boundary, #buffer, #centroid, #contains?, #convex_hull, #coord_seq, #covered_by?, #covers?, #crosses?, #delaunay_triangulation, #difference, #dimensions, #disjoint?, #distance, #empty?, #end_point, #envelope, #eql?, #eql_almost?, #eql_exact?, #extract_unique_points, #geom_type, #has_z?, #hausdorff_distance, #initialize, #initialize_copy, #interpolate, #interpolate_normalized, #intersection, #intersects?, #length, #line_merge, #nearest_points, #node, #normalize!, #num_coordinates, #num_geometries, #overlaps?, #point_on_surface, #polygonize, #polygonize_cut_edges, #polygonize_full, #project, #project_normalized, #relate, #relate_boundary_node_rule, #relate_pattern, release, #ring?, #shared_paths, #simple?, #simplify, #snap, #srid, #srid=, #start_point, #sym_difference, #to_prepared, #to_s, #topology_preserve_simplify, #touches?, #type_id, #unary_union, #union, #union_cascaded, #valid?, #valid_detail, #valid_reason, #within?

Methods included from Tools

#bool_result, #cast_geometry_ptr, #check_enum_value, #check_geometry, #pick_srid_according_to_policy, #pick_srid_from_geoms, #symbol_for_enum

Constructor Details

This class inherits a constructor from Geos::Geometry

Instance Method Details

#exterior_ring ⇒ Object 



24
25
26
27
28
29
30
31
32
 
# File 'lib/ffi-geos/polygon.rb', line 24

def exterior_ring
  cast_geometry_ptr(
    FFIGeos.GEOSGetExteriorRing_r(Geos.current_handle, self.ptr), {
      :auto_free => false,
      :srid_copy => self.srid,
      :parent => self
    }
  )
end

#interior_ring_n(n) ⇒ Object Also known as: interior_ring 



9
10
11
12
13
14
15
16
17
18
19
20
21
 
# File 'lib/ffi-geos/polygon.rb', line 9

def interior_ring_n(n)
  if n < 0 || n >= self.num_interior_rings
    raise RuntimeError.new("Index out of bounds")
  else
    cast_geometry_ptr(
      FFIGeos.GEOSGetInteriorRingN_r(Geos.current_handle, self.ptr, n), {
        :auto_free => false,
        :srid_copy => self.srid,
        :parent => self
      }
    )
  end
end

#interior_rings ⇒ Object 



34
35
36
37
38
 
# File 'lib/ffi-geos/polygon.rb', line 34

def interior_rings
  self.num_interior_rings.times.collect do |n|
    self.interior_ring_n(n)
  end
end

#num_interior_rings ⇒ Object 



5
6
7
 
# File 'lib/ffi-geos/polygon.rb', line 5

def num_interior_rings
  FFIGeos.GEOSGetNumInteriorRings_r(Geos.current_handle, self.ptr)
end