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/**********************************************************************
*
* GEOS - Geometry Engine Open Source
* http://geos.osgeo.org
*
* Copyright (C) 2011 Sandro Santilli <strk@kbt.io>
*
* 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.
*
**********************************************************************
*
* Last port: perf/operation/predicate/RectangleIntersectsPerfTest.java r378 (JTS-1.12)
*
**********************************************************************/
#include <geos/geom/PrecisionModel.h>
#include <geos/geom/GeometryFactory.h>
#include <geos/util/GeometricShapeFactory.h>
#include <geos/precision/SimpleGeometryPrecisionReducer.h>
#include <geos/geom/util/SineStarFactory.h>
#include <geos/geom/Geometry.h>
#include <geos/geom/Polygon.h>
#include <geos/geom/Point.h>
#include <geos/profiler.h>
#include <iostream>
#include <vector>
#include <cmath>
#include <sstream>
#include <memory>
using namespace geos::geom;
using namespace geos::io;
class InteriorPointAreaPerfTest {
public:
InteriorPointAreaPerfTest()
:
pm(),
fact(GeometryFactory::create(&pm, 0))
{
showHeader();
}
void
test(uint32_t nPts)
{
Coordinate origin(ORG_X, ORG_Y);
std::unique_ptr<geos::geom::Polygon> sinePoly =
createSineStar(origin, SIZE, nPts);
/*
* Make the geometry "crinkly" by rounding off the points.
* This defeats the MonotoneChain optimization in the full relate
* algorithm, and provides a more realistic test.
*/
using geos::precision::SimpleGeometryPrecisionReducer;
double scale = nPts / SIZE;
PrecisionModel p_pm(scale);
SimpleGeometryPrecisionReducer reducer(&p_pm);
std::unique_ptr<Geometry> sinePolyCrinkly(reducer.reduce(sinePoly.get()));
sinePoly.reset();
//std::cout << sinePolyCrinkly->toText() << std::endl;
test(*sinePolyCrinkly);
}
const double ORG_X = 100.0;
const double ORG_Y = 100.0;
const double SIZE = 100.0;
const int N_ARMS = 20;
const double ARM_RATIO = 0.3;
const int N_ITER = 100;
private:
PrecisionModel pm;
GeometryFactory::Ptr fact;
void
showHeader() {
std::cout << "Interior Point Area perf test" << std::endl;
std::cout << "# Iterations: " << N_ITER << std::endl;
std::cout << "SineStar: origin: ("
<< ORG_X << ", " << ORG_Y
<< ") size: " << SIZE
<< " # arms: " << N_ARMS
<< " arm ratio: " << ARM_RATIO
<< std::endl;
}
void
test(geos::geom::Geometry& poly)
{
geos::util::Profile sw("");
sw.start();
for(int i = 0; i < N_ITER; i++) {
std::unique_ptr<geos::geom::Point> pt( poly.getInteriorPoint() );
}
sw.stop();
std::cout << poly.getNumPoints() << " points: " << sw.getTotFormatted() << std::endl;
}
std::unique_ptr<geos::geom::Polygon>
createSineStar(const Coordinate& origin,
double size, uint32_t nPts)
{
using geos::geom::util::SineStarFactory;
SineStarFactory gsf(fact.get());
gsf.setCentre(origin);
gsf.setSize(size);
gsf.setNumPoints(nPts);
gsf.setArmLengthRatio( ARM_RATIO );
gsf.setNumArms( N_ARMS );
std::unique_ptr<geos::geom::Polygon> poly = gsf.createSineStar();
return poly;
}
};
int
main()
{
InteriorPointAreaPerfTest tester;
tester.test(100);
tester.test(1000);
tester.test(10000);
tester.test(100000);
tester.test(1000000);
}
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