ClickHouse/src/Functions/polygonsIntersection.cpp

138 lines
4.2 KiB
C++
Raw Normal View History

2020-06-17 15:29:08 +00:00
#include <Functions/FunctionFactory.h>
#include <Functions/geometryConverters.h>
#include <boost/geometry.hpp>
#include <boost/geometry/geometries/point_xy.hpp>
#include <boost/geometry/geometries/polygon.hpp>
2020-06-21 14:54:13 +00:00
#include <common/logger_useful.h>
2020-06-17 15:29:08 +00:00
#include <Columns/ColumnArray.h>
#include <Columns/ColumnTuple.h>
#include <Columns/ColumnConst.h>
2020-06-17 15:29:08 +00:00
#include <DataTypes/DataTypeArray.h>
#include <DataTypes/DataTypeTuple.h>
#include <DataTypes/DataTypeCustomGeo.h>
#include <memory>
#include <utility>
2020-06-17 15:29:08 +00:00
namespace DB
{
2021-01-21 12:31:47 +00:00
2021-02-11 20:37:05 +00:00
namespace ErrorCodes
{
extern const int BAD_ARGUMENTS;
}
2021-01-21 12:31:47 +00:00
template <typename Point>
2020-06-17 15:29:08 +00:00
class FunctionPolygonsIntersection : public IFunction
{
public:
2021-01-21 12:31:47 +00:00
static inline const char * name;
2020-06-17 15:29:08 +00:00
explicit FunctionPolygonsIntersection() = default;
static FunctionPtr create(const Context &)
{
return std::make_shared<FunctionPolygonsIntersection>();
}
String getName() const override
{
return name;
}
bool isVariadic() const override
{
return false;
}
size_t getNumberOfArguments() const override
{
return 2;
}
DataTypePtr getReturnTypeImpl(const DataTypes &) const override
{
return DataTypeCustomMultiPolygonSerialization::nestedDataType();
}
2021-02-11 20:37:05 +00:00
void checkInputType(const ColumnsWithTypeAndName & arguments) const
{
/// Array(Array(Array(Tuple(Float64, Float64))))
auto desired = std::make_shared<const DataTypeArray>(
std::make_shared<const DataTypeArray>(
std::make_shared<const DataTypeArray>(
std::make_shared<const DataTypeTuple>(
DataTypes{std::make_shared<const DataTypeFloat64>(), std::make_shared<const DataTypeFloat64>()}
)
)
)
);
if (!desired->equals(*arguments[0].type))
throw Exception(fmt::format("The type of the first argument of function {} must be Array(Array(Array(Tuple(Float64, Float64))))", name), ErrorCodes::BAD_ARGUMENTS);
if (!desired->equals(*arguments[1].type))
throw Exception(fmt::format("The type of the second argument of function {} must be Array(Array(Array(Tuple(Float64, Float64))))", name), ErrorCodes::BAD_ARGUMENTS);
}
2021-01-18 23:51:34 +00:00
ColumnPtr executeImpl(const ColumnsWithTypeAndName & arguments, const DataTypePtr & /*result_type*/, size_t input_rows_count) const override
2020-06-17 15:29:08 +00:00
{
2021-02-11 20:37:05 +00:00
checkInputType(arguments);
2021-01-21 12:31:47 +00:00
auto first_parser = makeGeometryFromColumnParser<Point>(arguments[0]);
2020-06-17 15:29:08 +00:00
auto first_container = createContainer(first_parser);
2021-01-21 12:31:47 +00:00
auto second_parser = makeGeometryFromColumnParser<Point>(arguments[1]);
2020-06-17 15:29:08 +00:00
auto second_container = createContainer(second_parser);
2021-01-21 12:31:47 +00:00
MultiPolygonSerializer<Point> serializer;
2020-06-17 15:29:08 +00:00
2021-01-21 12:31:47 +00:00
/// We are not interested in some pitfalls in third-party libraries
2021-01-20 23:12:47 +00:00
/// NOLINTNEXTLINE(clang-analyzer-core.uninitialized.Assign)
2020-06-17 15:29:08 +00:00
for (size_t i = 0; i < input_rows_count; i++)
{
2021-01-20 23:12:47 +00:00
get(first_parser, first_container, i);
get(second_parser, second_container, i);
2020-06-17 15:29:08 +00:00
2021-01-21 12:31:47 +00:00
auto intersection = MultiPolygon<Point>({{{{}}}});
auto first = boost::get<MultiPolygon<Point>>(first_container);
auto second = boost::get<MultiPolygon<Point>>(second_container);
/// Orient the polygons correctly.
boost::geometry::correct(first);
boost::geometry::correct(second);
/// Main work here.
2021-02-11 20:37:05 +00:00
boost::geometry::intersection(first, second, intersection);
2020-06-17 15:29:08 +00:00
2021-01-21 12:31:47 +00:00
intersection.erase(intersection.begin());
serializer.add(intersection);
2020-06-17 15:29:08 +00:00
}
2021-01-18 23:51:34 +00:00
return serializer.finalize();
2020-06-21 14:54:13 +00:00
}
bool useDefaultImplementationForConstants() const override
{
return true;
2020-06-17 15:29:08 +00:00
}
};
2021-01-21 12:31:47 +00:00
template <>
const char * FunctionPolygonsIntersection<CartesianPoint>::name = "polygonsIntersectionCartesian";
template <>
const char * FunctionPolygonsIntersection<GeographicPoint>::name = "polygonsIntersectionGeographic";
2020-06-17 15:29:08 +00:00
void registerFunctionPolygonsIntersection(FunctionFactory & factory)
{
2021-01-21 12:31:47 +00:00
factory.registerFunction<FunctionPolygonsIntersection<CartesianPoint>>();
factory.registerFunction<FunctionPolygonsIntersection<GeographicPoint>>();
2020-06-17 15:29:08 +00:00
}
}