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/**********************************************************************
*
* GEOS - Geometry Engine Open Source
* http://geos.osgeo.org
*
* Copyright (C) 2019 Daniel Baston <dbaston@gmail.com>
*
* This is free software; you can redistribute and/or modify it under
* the terms of the GNU Lesser General Public Licence as published
* by the Free Software Foundation.
* See the COPYING file for more information.
*
**********************************************************************/
#include <geos/profiler.h>
#include <geos_c.h>
#include <fstream>
#include <iostream>
#include <sstream>
#include <deque>
using BinaryPredicate = decltype(&GEOSIntersects);
using BinaryOperation = decltype(&GEOSIntersection);
int main(int argc, char** argv) {
if (argc < 2 || argc > 5) {
std::cout << "perf_intersection reads geometries from a WKT file and" << std::endl;
std::cout << "inserts them into an STR-tree. For each input geometry, it" << std::endl;
std::cout << "queries the tree to find all intersecting geometries and" << std::endl;
std::cout << "then computes their intersection." << std::endl;
std::cout << std::endl;
std::cout << "Usage: perf_intersection [wktfile] [n] [pred] [op]" << std::endl;
return 0;
}
initGEOS(nullptr, nullptr);
std::string fname{argv[1]};
long max_geoms;
if (argc >= 3 && std::string(argv[2]) != "all") {
max_geoms = std::atol(argv[2]);
std::cout << "Reading up to " << max_geoms << " geometries from " << fname << std::endl;
} else {
std::cout << "Reading geometries from " << fname << std::endl;
max_geoms = std::numeric_limits<decltype(max_geoms)>::max();
}
std::string pred = "intersects";
if (argc >= 4) {
pred = argv[3];
}
BinaryPredicate predfn = GEOSIntersects;
if (pred == "intersects") {
predfn = GEOSIntersects;
} else if (pred == "contains") {
predfn = GEOSContains;
} else if (pred == "covers") {
predfn = GEOSCovers;
} else if (pred == "within") {
predfn = GEOSWithin;
} else if (pred == "coveredby") {
predfn = GEOSCoveredBy;
} else if (pred == "touches") {
predfn = GEOSTouches;
} else if (pred == "overlaps") {
predfn = GEOSOverlaps;
} else if (pred == "crosses") {
predfn = GEOSCrosses;
} else if (pred == "equals") {
predfn = GEOSEquals;
} else {
std::cerr << "Unknown predicate." << std::endl;
return 1;
}
std::string overlay = "intersection";
if (argc >= 5) {
overlay = argv[4];
}
BinaryOperation overlayfn = GEOSIntersection;
if (overlay == "intersection") {
overlayfn = GEOSIntersection;
} else if (overlay == "none") {
overlayfn = nullptr;
}
std::vector<GEOSGeometry*> geoms;
std::ifstream f(fname);
std::string line;
long i = 0;
std::deque<long> lineNos;
while(std::getline(f, line) && i < max_geoms) {
auto geom = GEOSGeomFromWKT(line.c_str());
if (geom) {
i++;
lineNos.push_back(i);
GEOSGeom_setUserData(geom, &lineNos.back());
geoms.push_back(geom);
}
}
f.close();
std::cout << "Read " << geoms.size() << " geometries." << std::endl;
std::cout << "Testing according to predicate: " << pred << " and performing operation: " << overlay << std::endl;
GEOSSTRtree* tree = GEOSSTRtree_create(10);
for (const auto& g : geoms) {
GEOSSTRtree_insert(tree, g, g);
}
geos::util::Profile sw("Intersection");
sw.start();
struct QueryContext {
GEOSGeometry* queryGeom;
BinaryPredicate pred;
BinaryOperation overlay;
std::size_t* treeHits;
std::size_t* predHits;
};
std::size_t treeHits = 0;
std::size_t predHits = 0;
for (const auto& g : geoms) {
QueryContext ctxt{g, predfn, overlayfn, &treeHits, &predHits};
GEOSSTRtree_query(tree, g, [](void* item, void* data) {
auto context = static_cast<QueryContext*>(data);
++*context->treeHits;
GEOSGeometry* g1 = (GEOSGeometry*) context->queryGeom;
GEOSGeometry* g2 = (GEOSGeometry*) item;
#if 0
std::cout << "Eval pred btwn geom " << *static_cast<long*>(GEOSGeom_getUserData(g1)) << " and " << *static_cast<long*>(GEOSGeom_getUserData(g2)) << std::endl;
#endif
if ((context->pred)(g1, g2) == 1) {
++*context->predHits;
if (context->overlay) {
GEOSGeometry* g3 = (context->overlay)(g1, g2);
GEOSGeom_destroy(g3);
}
}
}, &ctxt);
}
sw.stop();
std::cerr << predHits << " out of " << treeHits << " bounding box intersections satisfied predicate: " << pred << " (" << 100 * static_cast<double>(predHits) / static_cast<double>(treeHits) << "%)" << std::endl;
std::cout << sw.getTotFormatted() << std::endl;
GEOSSTRtree_destroy(tree);
for (auto& g : geoms) {
GEOSGeom_destroy(g);
}
}
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