/__w/cuspatial/cuspatial/cpp/include/cuspatial/pairwise_multipoint_equals_count.cuh

Count the number of equal points in multipoint pairs.

Count the number of equal points in multipoint pairs.Given two ranges of multipoints, this function counts points in the left-hand multipoint that exist in the corresponding right-hand multipoint.

lhs: { {0, 0} } rhs: { {0, 0}, {1, 1}, {2, 2}, {3, 3} } count: { 1 }

lhs: { {0, 0}, {1, 1}, {2, 2}, {3, 3} } rhs: { {0, 0} } count: { 1 }

lhs: { { {3, 3}, {3, 3}, {0, 0} }, { {0, 0}, {1, 1}, {2, 2} }, { {0, 0} } } rhs: { { {0, 0}, {2, 2}, {1, 1} }, { {2, 2}, {0, 0}, {1, 1} }, { {1, 1} } } count: { 1, 3, 0 }

Note

All input iterators must conform to the specification defined by multipoint_range.cuh and the output iterator must be able to accept for storage values of type uint32_t.

Parameters

[in]	lhs_first	multipoint_range of first array of multipoints
[in]	rhs_first	multipoint_range of second array of multipoints
[out]	count_first	beginning of range of uint32_t counts
[in]	stream	The CUDA stream on which to perform computations and allocate memory.

Template Parameters

MultiPointRangeA	The multipolygon range to compare point equality from
MultiPointRangeB	The multipolygon range to compare point equality to
OutputIt	Iterator over uint32_t. Must meet the requirements of LegacyRandomAccessIterator and be device-accessible and mutable.

Returns

Output iterator to the element past the last count result written.

/*
 * Copyright (c) 2023, NVIDIA CORPORATION.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
 
#pragma once
 
#include <cuspatial/geometry/vec_2d.hpp>
 
#include <rmm/cuda_stream_view.hpp>
 
#include <iterator>
 
namespace cuspatial {
 
template <class MultiPointRangeA, class MultiPointRangeB, class OutputIt>
OutputIt pairwise_multipoint_equals_count(MultiPointRangeA lhs_first,
                                          MultiPointRangeB rhs_first,
                                          OutputIt count_first,
                                          rmm::cuda_stream_view stream = rmm::cuda_stream_default);
 
}  // namespace cuspatial
 
#include <cuspatial/detail/pairwise_multipoint_equals_count.cuh>