Method: RGeo::Geos::CAPILineStringMethods#point_n

Defined in:
ext/geos_c_impl/line_string.c

#point_n(n) ⇒ Object 



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# File 'ext/geos_c_impl/line_string.c', line 151

static VALUE
method_line_string_point_n(VALUE self, VALUE n)
{
  VALUE result;
  RGeo_GeometryData* self_data;
  const GEOSGeometry* self_geom;
  const GEOSCoordSequence* coord_seq;
  char has_z;
  int si;
  unsigned int i;
  unsigned int size;

  result = Qnil;
  self_data = RGEO_GEOMETRY_DATA_PTR(self);
  self_geom = self_data->geom;
  if (self_geom) {
    coord_seq = GEOSGeom_getCoordSeq(self_geom);
    if (coord_seq) {
      has_z = (char)(RGEO_FACTORY_DATA_PTR(self_data->factory)->flags &
                     RGEO_FACTORYFLAGS_SUPPORTS_Z_OR_M);
      si = RB_NUM2INT(n);
      if (si >= 0) {
        i = si;
        if (GEOSCoordSeq_getSize(coord_seq, &size)) {
          if (i < size) {
            result = get_point_from_coordseq(self, coord_seq, i, has_z);
          }
        }
      }
    }
  }
  return result;
}