Module: OGR::Geometry::RttopoExtensions

Included in:
OGR::GeometryCollection25D, LineString, LineString25D, LinearRing, MultiLineString, MultiLineString25D, MultiPoint, MultiPoint25D, MultiPolygon, MultiPolygon25D, Point, Point25D, Polygon, Polygon25D
Defined in:
lib/ogr/extensions/geometry/rttopo_extensions.rb

Overview

Methods for {OGR{OGR::Geometry}s that use rttopo to operate on themselves.

See Also:

Instance Method Summary collapse

Instance Method Details

#make_valid ⇒ OGR::Geometry

Uses rttopo’s make_valid to make the current geometry valid.

Returns:

  • (OGR::Geometry) —

    Returns a new geometry, based on the rttopo_make_valid call.



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# File 'lib/ogr/extensions/geometry/rttopo_extensions.rb', line 17

def make_valid
  ctx = FFI::Rttopo.rtgeom_init FFI::MemoryPointer::NULL, FFI::MemoryPointer::NULL, FFI::MemoryPointer::NULL
  geom = FFI::Rttopo.rtgeom_from_wkb(ctx, to_wkb, wkb_size, false)
  valid_geom = FFI::Rttopo.rtgeom_make_valid(ctx, geom)
  valid_wkb_size = FFI::MemoryPointer.new(:size_t)
  valid_wkb_ptr = FFI::Rttopo.rtgeom_to_wkb(ctx, valid_geom, FFI::Rttopo::RTWKB_EXTENDED, valid_wkb_size)
  valid_wkb = valid_wkb_ptr.read_bytes(valid_wkb_size.read_int)

  FFI::Rttopo.rtfree ctx, geom
  FFI::Rttopo.rtfree ctx, valid_geom
  FFI::Rttopo.rtfree ctx, valid_wkb_ptr
  FFI::Rttopo.rtgeom_finish ctx
  OGR::Geometry.create_from_wkb(valid_wkb)
end