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ArborX_BruteForce.hpp
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ArborX_BruteForce.hpp
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/****************************************************************************
* Copyright (c) 2017-2023 by the ArborX authors *
* All rights reserved. *
* *
* This file is part of the ArborX library. ArborX is *
* distributed under a BSD 3-clause license. For the licensing terms see *
* the LICENSE file in the top-level directory. *
* *
* SPDX-License-Identifier: BSD-3-Clause *
****************************************************************************/
#ifndef ARBORX_BRUTE_FORCE_HPP
#define ARBORX_BRUTE_FORCE_HPP
#include <ArborX_AccessTraits.hpp>
#include <ArborX_Box.hpp>
#include <ArborX_CrsGraphWrapper.hpp>
#include <ArborX_DetailsBruteForceImpl.hpp>
#include <ArborX_DetailsCrsGraphWrapperImpl.hpp>
#include <ArborX_DetailsKokkosExtAccessibilityTraits.hpp>
#include <ArborX_DetailsLegacy.hpp>
#include <ArborX_IndexableGetter.hpp>
#include <Kokkos_Core.hpp>
#include <Kokkos_Profiling_ScopedRegion.hpp>
namespace ArborX
{
template <
typename MemorySpace, typename Value = Details::LegacyDefaultTemplateValue,
typename IndexableGetter = Details::DefaultIndexableGetter,
typename BoundingVolume = ExperimentalHyperGeometry::Box<
GeometryTraits::dimension_v<
std::decay_t<std::invoke_result_t<IndexableGetter, Value>>>,
typename GeometryTraits::coordinate_type<
std::decay_t<std::invoke_result_t<IndexableGetter, Value>>>::type>>
class BruteForce
{
public:
using memory_space = MemorySpace;
static_assert(Kokkos::is_memory_space<MemorySpace>::value);
using size_type = typename MemorySpace::size_type;
using bounding_volume_type = BoundingVolume;
using value_type = Value;
BruteForce() = default;
template <typename ExecutionSpace, typename Values>
BruteForce(ExecutionSpace const &space, Values const &values,
IndexableGetter const &indexable_getter = IndexableGetter());
KOKKOS_FUNCTION
size_type size() const noexcept { return _size; }
KOKKOS_FUNCTION
bool empty() const noexcept { return size() == 0; }
KOKKOS_FUNCTION
bounding_volume_type bounds() const noexcept { return _bounds; }
template <typename ExecutionSpace, typename Predicates, typename Callback,
typename Ignore = int>
void query(ExecutionSpace const &space, Predicates const &predicates,
Callback const &callback, Ignore = Ignore()) const;
template <typename ExecutionSpace, typename UserPredicates,
typename CallbackOrView, typename View, typename... Args>
std::enable_if_t<Kokkos::is_view_v<std::decay_t<View>>>
query(ExecutionSpace const &space, UserPredicates const &user_predicates,
CallbackOrView &&callback_or_view, View &&view, Args &&...args) const
{
Kokkos::Profiling::ScopedRegion guard("ArborX::BruteForce::query_crs");
Details::CrsGraphWrapperImpl::
check_valid_callback_if_first_argument_is_not_a_view<value_type>(
callback_or_view, user_predicates, view);
using Predicates = Details::AccessValues<UserPredicates, PredicatesTag>;
using Tag = typename Predicates::value_type::Tag;
Details::CrsGraphWrapperImpl::queryDispatch(
Tag{}, *this, space, Predicates{user_predicates},
std::forward<CallbackOrView>(callback_or_view),
std::forward<View>(view), std::forward<Args>(args)...);
}
private:
size_type _size{0};
bounding_volume_type _bounds;
Kokkos::View<value_type *, memory_space> _values;
IndexableGetter _indexable_getter;
};
template <typename MemorySpace>
class BruteForce<MemorySpace, Details::LegacyDefaultTemplateValue,
Details::DefaultIndexableGetter,
ExperimentalHyperGeometry::Box<3, float>>
: public BruteForce<MemorySpace, PairValueIndex<Box>,
Details::DefaultIndexableGetter, Box>
{
using base_type = BruteForce<MemorySpace, PairValueIndex<Box>,
Details::DefaultIndexableGetter, Box>;
public:
using bounding_volume_type = typename base_type::bounding_volume_type;
BruteForce() = default;
template <typename ExecutionSpace, typename Primitives>
BruteForce(ExecutionSpace const &space, Primitives const &primitives)
: base_type(
space,
// Validate the primitives before calling the base constructor
(Details::check_valid_access_traits(PrimitivesTag{}, primitives),
Details::LegacyValues<Primitives, bounding_volume_type>{
primitives}),
Details::DefaultIndexableGetter())
{}
template <typename ExecutionSpace, typename Predicates, typename Callback,
typename Ignore = int>
void query(ExecutionSpace const &space, Predicates const &predicates,
Callback const &callback, Ignore = Ignore()) const
{
Details::check_valid_callback<int>(callback, predicates);
base_type::query(space, predicates,
Details::LegacyCallbackWrapper<Callback>{callback});
}
template <typename ExecutionSpace, typename Predicates, typename View,
typename... Args>
std::enable_if_t<Kokkos::is_view_v<std::decay_t<View>>>
query(ExecutionSpace const &space, Predicates const &predicates, View &&view,
Args &&...args) const
{
base_type::query(space, predicates, Details::LegacyDefaultCallback{},
std::forward<View>(view), std::forward<Args>(args)...);
}
template <typename ExecutionSpace, typename Predicates, typename Callback,
typename OutputView, typename OffsetView, typename... Args>
std::enable_if_t<!Kokkos::is_view_v<std::decay_t<Callback>>>
query(ExecutionSpace const &space, Predicates const &predicates,
Callback &&callback, OutputView &&out, OffsetView &&offset,
Args &&...args) const
{
if constexpr (!Details::is_tagged_post_callback<
std::decay_t<Callback>>::value)
{
Details::check_valid_callback<int>(callback, predicates, out);
base_type::query(space, predicates,
Details::LegacyCallbackWrapper<std::decay_t<Callback>>{
std::forward<Callback>(callback)},
std::forward<OutputView>(out),
std::forward<OffsetView>(offset),
std::forward<Args>(args)...);
}
else
{
Kokkos::Profiling::ScopedRegion guard("ArborX::BruteForce::query_crs");
Kokkos::View<int *, MemorySpace> indices(
"ArborX::CrsGraphWrapper::query::indices", 0);
base_type::query(space, predicates, Details::LegacyDefaultCallback{},
indices, std::forward<OffsetView>(offset),
std::forward<Args>(args)...);
callback(predicates, std::forward<OffsetView>(offset), indices,
std::forward<OutputView>(out));
}
}
};
template <typename MemorySpace, typename Value, typename IndexableGetter,
typename BoundingVolume>
template <typename ExecutionSpace, typename UserValues>
BruteForce<MemorySpace, Value, IndexableGetter, BoundingVolume>::BruteForce(
ExecutionSpace const &space, UserValues const &user_values,
IndexableGetter const &indexable_getter)
: _size(AccessTraits<UserValues, PrimitivesTag>::size(user_values))
, _values(Kokkos::view_alloc(space, Kokkos::WithoutInitializing,
"ArborX::BruteForce::values"),
_size)
, _indexable_getter(indexable_getter)
{
static_assert(
KokkosBlah::is_accessible_from<MemorySpace, ExecutionSpace>::value);
// FIXME redo with RangeTraits
Details::check_valid_access_traits<UserValues>(
PrimitivesTag{}, user_values, Details::DoNotCheckGetReturnType());
using Values = Details::AccessValues<UserValues, PrimitivesTag>;
Values values{user_values};
static_assert(KokkosBlah::is_accessible_from<typename Values::memory_space,
ExecutionSpace>::value,
"Values must be accessible from the execution space");
Kokkos::Profiling::ScopedRegion guard("ArborX::BruteForce::BruteForce");
if (empty())
{
return;
}
Details::BruteForceImpl::initializeBoundingVolumesAndReduceBoundsOfTheScene(
space, values, _indexable_getter, _values, _bounds);
}
template <typename MemorySpace, typename Value, typename IndexableGetter,
typename BoundingVolume>
template <typename ExecutionSpace, typename UserPredicates, typename Callback,
typename Ignore>
void BruteForce<MemorySpace, Value, IndexableGetter, BoundingVolume>::query(
ExecutionSpace const &space, UserPredicates const &user_predicates,
Callback const &callback, Ignore) const
{
static_assert(
KokkosBlah::is_accessible_from<MemorySpace, ExecutionSpace>::value);
Details::check_valid_access_traits(PredicatesTag{}, user_predicates);
Details::check_valid_callback<value_type>(callback, user_predicates);
using Predicates = Details::AccessValues<UserPredicates, PredicatesTag>;
static_assert(
KokkosBlah::is_accessible_from<typename Predicates::memory_space,
ExecutionSpace>::value,
"Predicates must be accessible from the execution space");
Predicates predicates{user_predicates};
using Tag = typename Predicates::value_type::Tag;
static_assert(std::is_same<Tag, Details::SpatialPredicateTag>{},
"nearest query not implemented yet");
Kokkos::Profiling::pushRegion("ArborX::BruteForce::query::spatial");
Details::BruteForceImpl::query(
space, predicates, _values,
Details::Indexables<decltype(_values), IndexableGetter>{
_values, _indexable_getter},
callback);
Kokkos::Profiling::popRegion();
}
} // namespace ArborX
#endif