mirror of https://gitee.com/bigwinds/arangodb
86 lines
3.0 KiB
C++
86 lines
3.0 KiB
C++
////////////////////////////////////////////////////////////////////////////////
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/// DISCLAIMER
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///
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/// Copyright 2017 ArangoDB GmbH, Cologne, Germany
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///
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/// Licensed under the Apache License, Version 2.0 (the "License");
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/// you may not use this file except in compliance with the License.
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/// You may obtain a copy of the License at
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///
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/// http://www.apache.org/licenses/LICENSE-2.0
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///
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/// Unless required by applicable law or agreed to in writing, software
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/// distributed under the License is distributed on an "AS IS" BASIS,
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/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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/// See the License for the specific language governing permissions and
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/// limitations under the License.
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///
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/// Copyright holder is ArangoDB GmbH, Cologne, Germany
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///
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/// @author Simon Grätzer
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////////////////////////////////////////////////////////////////////////////////
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#include "GeoParams.h"
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#include <s2/s1angle.h>
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#include <s2/s2cap.h>
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#include <s2/s2earth.h>
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#include <s2/s2metrics.h>
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#include <s2/s2region_coverer.h>
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#include <velocypack/Builder.h>
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#include <velocypack/Slice.h>
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#include <velocypack/velocypack-aliases.h>
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#include "Basics/Common.h"
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#include "Basics/debugging.h"
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using namespace arangodb;
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using namespace arangodb::geo;
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RegionCoverParams::RegionCoverParams()
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: maxNumCoverCells(kMaxNumCoverCellsDefault),
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worstIndexedLevel(S2::kAvgEdge.GetClosestLevel(S2Earth::KmToRadians(600))),
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bestIndexedLevel(S2::kAvgEdge.GetClosestLevel(S2Earth::MetersToRadians(100.0))) {
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// optimize levels for buildings, points are converted without S2RegionCoverer
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}
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/// @brief read the options from a vpack slice
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void RegionCoverParams::fromVelocyPack(VPackSlice const& params) {
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TRI_ASSERT(params.isObject());
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VPackSlice v;
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if ((v = params.get("maxNumCoverCells")).isInteger()) {
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maxNumCoverCells = v.getNumber<int>();
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}
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if ((v = params.get("worstIndexedLevel")).isInteger()) {
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worstIndexedLevel = v.getNumber<int>();
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}
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if ((v = params.get("bestIndexedLevel")).isInteger()) {
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bestIndexedLevel = v.getNumber<int>();
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}
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}
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/// @brief add the options to an opened vpack builder
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void RegionCoverParams::toVelocyPack(VPackBuilder& builder) const {
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TRI_ASSERT(builder.isOpenObject());
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builder.add("maxNumCoverCells", VPackValue(maxNumCoverCells));
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builder.add("worstIndexedLevel", VPackValue(worstIndexedLevel));
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builder.add("bestIndexedLevel", VPackValue(bestIndexedLevel));
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}
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S2RegionCoverer::Options RegionCoverParams::regionCovererOpts() const {
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S2RegionCoverer::Options opts;
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opts.set_max_cells(maxNumCoverCells); // This is a soft limit
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opts.set_min_level(worstIndexedLevel); // Levels are a strict limit
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opts.set_max_level(bestIndexedLevel);
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return opts;
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}
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double geo::QueryParams::minDistanceRad() const noexcept {
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return std::max(0.0, std::min(minDistance / kEarthRadiusInMeters, M_PI));
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}
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double geo::QueryParams::maxDistanceRad() const noexcept {
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return std::max(0.0, std::min(maxDistance / kEarthRadiusInMeters, M_PI));
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}
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