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133 lines
4.1 KiB
C++
133 lines
4.1 KiB
C++
#include "config_functions.h"
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#if USE_S2_GEOMETRY
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#include <Columns/ColumnsNumber.h>
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#include <Columns/ColumnTuple.h>
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#include <DataTypes/DataTypesNumber.h>
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#include <DataTypes/DataTypeTuple.h>
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#include <Functions/FunctionFactory.h>
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#include <Common/typeid_cast.h>
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#include <Common/NaNUtils.h>
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#include <base/range.h>
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#include "s2_fwd.h"
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namespace DB
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{
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namespace ErrorCodes
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{
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extern const int ILLEGAL_TYPE_OF_ARGUMENT;
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extern const int BAD_ARGUMENTS;
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}
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namespace
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{
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/**
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* The cap represents a portion of the sphere that has been cut off by a plane.
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* It is defined by a point on a sphere and a radius in degrees.
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* Imagine that we draw a line through the center of the sphere and our point.
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* An infinite number of planes pass through this line, but any plane will intersect the cap in two points.
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* Thus the angle is defined by one of this points and the entire line.
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* So, the radius of Pi/2 defines a hemisphere and the radius of Pi defines a whole sphere.
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*
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* This function returns whether a cap contains a point.
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*/
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class FunctionS2CapContains : public IFunction
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{
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public:
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static constexpr auto name = "s2CapContains";
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static FunctionPtr create(ContextPtr)
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{
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return std::make_shared<FunctionS2CapContains>();
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}
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std::string getName() const override
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{
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return name;
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}
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size_t getNumberOfArguments() const override { return 3; }
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bool useDefaultImplementationForConstants() const override { return true; }
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bool isSuitableForShortCircuitArgumentsExecution(const DataTypesWithConstInfo & /*arguments*/) const override { return true; }
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DataTypePtr getReturnTypeImpl(const DataTypes & arguments) const override
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{
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for (size_t index = 0; index < getNumberOfArguments(); ++index)
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{
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const auto * arg = arguments[index].get();
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/// Radius
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if (index == 1)
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{
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if (!WhichDataType(arg).isFloat64())
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throw Exception(
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ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT,
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"Illegal type {} of argument {} of function {}. Must be Float64",
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arg->getName(), 2, getName());
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}
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else if (!WhichDataType(arg).isUInt64())
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throw Exception(
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ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT,
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"Illegal type {} of argument {} of function {}. Must be UInt64",
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arg->getName(), index + 1, getName());
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}
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return std::make_shared<DataTypeUInt8>();
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}
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ColumnPtr executeImpl(const ColumnsWithTypeAndName & arguments, const DataTypePtr &, size_t input_rows_count) const override
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{
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const auto * col_center = arguments[0].column.get();
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const auto * col_degrees = arguments[1].column.get();
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const auto * col_point = arguments[2].column.get();
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auto dst = ColumnUInt8::create();
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auto & dst_data = dst->getData();
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dst_data.reserve(input_rows_count);
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for (const auto row : collections::range(0, input_rows_count))
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{
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const auto center = S2CellId(col_center->getUInt(row));
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const Float64 degrees = col_degrees->getFloat64(row);
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const auto point = S2CellId(col_point->getUInt(row));
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if (isNaN(degrees))
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throw Exception(ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT, "Radius of the cap must not be nan");
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if (std::isinf(degrees))
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throw Exception(ErrorCodes::ILLEGAL_TYPE_OF_ARGUMENT, "Radius of the cap must not be infinite");
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if (!center.is_valid())
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throw Exception(ErrorCodes::BAD_ARGUMENTS, "Center is not valid");
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if (!point.is_valid())
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throw Exception(ErrorCodes::BAD_ARGUMENTS, "Point is not valid");
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S1Angle angle = S1Angle::Degrees(degrees);
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S2Cap cap(center.ToPoint(), angle);
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dst_data.emplace_back(cap.Contains(point.ToPoint()));
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}
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return dst;
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}
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};
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}
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void registerFunctionS2CapContains(FunctionFactory & factory)
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{
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factory.registerFunction<FunctionS2CapContains>();
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}
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}
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#endif
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