anonymous_namespace{Types.cpp} Namespace Reference

Classes
struct	Coords
struct	BoundingBox

Functions
int	process_poly_ring (OGRLinearRing *ring, std::vector< double > &coords, BoundingBox *bbox)

Variables
constexpr auto	DOUBLE_MAX = std::numeric_limits<double>::max()
constexpr auto	DOUBLE_MIN = std::numeric_limits<double>::lowest()

Detailed Description

Note: We use dynamic_cast to convert the OGRGeometry pointer from the base class into appropriate OGR<<type>> objects in derived clases to ensure GDAL is creating the proper geometry type for all possibly inputs. Since we check the output type after creating a new OGRGeometry object via the OGRGeometryFactor, we could theoretically move some dynamic_cast to static_cast. The performance impact and safety of going from RTTI to compile time casting needs to be investigated.

Function Documentation

int anonymous_namespace{Types.cpp}::process_poly_ring	(	OGRLinearRing *	ring,
		std::vector< double > &	coords,
		BoundingBox *	bbox
	)

Definition at line 70 of file Types.cpp.

References DOUBLE_MAX, to_string(), and anonymous_namespace{Types.cpp}::BoundingBox::update().

Referenced by Geospatial::GeoPolygon::getColumns(), and Geospatial::GeoMultiPolygon::getColumns().

                                         {
  double last_x = DOUBLE_MAX, last_y = DOUBLE_MAX;
  size_t first_index = coords.size();
  int num_points_added = 0;
  int num_points_in_ring = ring->getNumPoints();
  if (num_points_in_ring < 3) {
    throw Geospatial::GeoTypesError(
        "PolyRing",
        "All poly rings must have more than 3 points. Found ring with " +
            std::to_string(num_points_in_ring) + " points.");
  }
  for (auto i = 0; i < num_points_in_ring; i++) {
    OGRPoint point;
    ring->getPoint(i, &point);
    last_x = point.getX();
    last_y = point.getY();
    coords.push_back(last_x);
    coords.push_back(last_y);
    if (bbox) {
      bbox->update(last_x, last_y);
    }
    num_points_added++;
  }
  // Store all rings as open rings (implicitly assumes all rings are closed)
  if ((coords[first_index] == last_x) && (coords[first_index + 1] == last_y)) {
    coords.pop_back();
    coords.pop_back();
    num_points_added--;
    if (num_points_added < 3) {
      throw Geospatial::GeoTypesError(
          "PolyRing",
          "All exterior rings must have more than 3 points. Found ring with " +
              std::to_string(num_points_added) + " points.");
    }
  }
  return num_points_added;
}

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Variable Documentation

constexpr auto anonymous_namespace{Types.cpp}::DOUBLE_MAX = std::numeric_limits<double>::max()

Definition at line 40 of file Types.cpp.

Referenced by compute_bounds_of_coords(), and process_poly_ring().

constexpr auto anonymous_namespace{Types.cpp}::DOUBLE_MIN = std::numeric_limits<double>::lowest()

Definition at line 41 of file Types.cpp.

Referenced by compute_bounds_of_coords().