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// $Id: DouglasPeuckerSimplifierTest.cpp 1988 2007-06-08 17:13:36Z mloskot $
//
// Test Suite for geos::simplify::DouglasPeuckerSimplifierTest
// TUT
#include <tut.h>
// GEOS
#include <geos/io/WKTReader.h>
#include <geos/geom/PrecisionModel.h>
#include <geos/geom/GeometryFactory.h>
#include <geos/geom/Geometry.h>
#include <geos/simplify/DouglasPeuckerSimplifier.h>
#include <string>
#include <memory>
namespace tut
{
using namespace geos::simplify;
//
// Test Group
//
// Common data used by tests
struct test_dpsimp_data
{
geos::geom::PrecisionModel pm;
geos::geom::GeometryFactory gf;
geos::io::WKTReader wktreader;
typedef geos::geom::Geometry::AutoPtr GeomPtr;
test_dpsimp_data()
:
pm(1.0),
gf(&pm),
wktreader(&gf)
{}
};
typedef test_group<test_dpsimp_data> group;
typedef group::object object;
group test_dpsimp_group("geos::simplify::DouglasPeuckerSimplifier");
//
// Test Cases
//
// 1 - PolygonNoReduction
template<>
template<>
void object::test<1>()
{
std::string wkt("POLYGON((20 220, 40 220, 60 220, 80 220, 100 220, \
120 220, 140 220, 140 180, 100 180, 60 180, 20 180, 20 220))");
GeomPtr g(wktreader.read(wkt));
GeomPtr simplified = DouglasPeuckerSimplifier::simplify(
g.get(), 10.0);
ensure( simplified->isValid() );
// topology is unchanged
ensure( simplified->equals(g.get()) );
}
// 2 - PolygonReductionWithSplit
template<>
template<>
void object::test<2>()
{
std::string wkt_in("POLYGON ((40 240, 160 241, 280 240, 280 160, \
160 240, 40 140, 40 240))");
std::string wkt_ex("MULTIPOLYGON (((40.0 240.0, 160.0 240.0, 40.0 140.0, 40.0 240.0)), \
((160.0 240.0, 280.0 240.0, 280.0 160.0, 160.0 240.0)))");
GeomPtr g(wktreader.read(wkt_in));
GeomPtr expected(wktreader.read(wkt_ex));
// TODO: This test blows because if instability of geos.index.strtree::yComparator() predicate
GeomPtr simplified = DouglasPeuckerSimplifier::simplify(
g.get(), 10.0);
ensure( simplified->isValid() );
ensure( simplified->equalsExact(expected.get()) );
}
// 3 - PolygonReduction
template<>
template<>
void object::test<3>()
{
std::string wkt_in("POLYGON ((120 120, 121 121, 122 122, 220 120, \
180 199, 160 200, 140 199, 120 120))");
std::string wkt_ex("POLYGON ((120 120, 140 199, 160 200, 180 199, 220 120, 120 120))");
GeomPtr g(wktreader.read(wkt_in));
GeomPtr expected(wktreader.read(wkt_ex));
GeomPtr simplified = DouglasPeuckerSimplifier::simplify(
g.get(), 10.0);
ensure( simplified->isValid() );
ensure( simplified->equalsExact(expected.get()) );
}
// 4 - PolygonWithTouchingHole
template<>
template<>
void object::test<4>()
{
std::string wkt_in("POLYGON ((80 200, 240 200, 240 60, 80 60, 80 200), \
(120 120, 220 120, 180 199, 160 200, 140 199, 120 120))");
std::string wkt_ex("POLYGON ((80 200, 160 200, 240 200, 240 60, 80 60, 80 200), \
(160 200, 140 199, 120 120, 220 120, 180 199, 160 200)))");
GeomPtr g(wktreader.read(wkt_in));
GeomPtr expected(wktreader.read(wkt_ex));
GeomPtr simplified = DouglasPeuckerSimplifier::simplify(
g.get(), 10.0);
ensure( simplified->isValid() );
ensure( simplified->isValid() );
ensure( simplified->equalsExact(expected.get()) );
}
// 5 - FlattishPolygon
template<>
template<>
void object::test<5>()
{
std::string wkt_in("POLYGON ((0 0, 50 0, 53 0, 55 0, 100 0, 70 1, 60 1, 50 1, 40 1, 0 0))");
std::string wkt_ex("POLYGON EMPTY");
GeomPtr g(wktreader.read(wkt_in));
GeomPtr expected(wktreader.read(wkt_ex));
GeomPtr simplified = DouglasPeuckerSimplifier::simplify(
g.get(), 10.0);
ensure( simplified->isValid() );
ensure( simplified->equalsExact(expected.get()) );
//ensure_equals( *simplified, *expected );
}
// 6 - TinySquare
template<>
template<>
void object::test<6>()
{
std::string wkt_in("POLYGON ((0 5, 5 5, 5 0, 0 0, 0 1, 0 5))");
std::string wkt_ex("POLYGON EMPTY");
GeomPtr g(wktreader.read(wkt_in));
GeomPtr expected(wktreader.read(wkt_ex));
GeomPtr simplified = DouglasPeuckerSimplifier::simplify(
g.get(), 10.0);
ensure( simplified->isValid() );
ensure( simplified->equalsExact(expected.get()) );
}
// 7 - TinyLineString
template<>
template<>
void object::test<7>()
{
std::string wkt_in("LINESTRING (0 5, 1 5, 2 5, 5 5)");
std::string wkt_ex("LINESTRING (0 5, 5 5)");
GeomPtr g(wktreader.read(wkt_in));
GeomPtr expected(wktreader.read(wkt_ex));
GeomPtr simplified = DouglasPeuckerSimplifier::simplify(
g.get(), 10.0);
ensure( simplified->isValid() );
ensure( simplified->equalsExact(expected.get()) );
}
// 8 - MultiPoint
template<>
template<>
void object::test<8>()
{
std::string wkt_in("MULTIPOINT(80 200, 240 200, 240 60, 80 60, 80 200, 140 199, 120 120)");
GeomPtr g(wktreader.read(wkt_in));
GeomPtr simplified = DouglasPeuckerSimplifier::simplify(
g.get(), 10.0);
// MultiPoint is *not* simplified
ensure( simplified->equalsExact(g.get()) );
}
// 9 - MultiLineString
template<>
template<>
void object::test<9>()
{
std::string wkt_in("MULTILINESTRING( (0 0, 50 0, 70 0, 80 0, 100 0), \
(0 0, 50 1, 60 1, 100 0) )");
std::string wkt_ex("MULTILINESTRING( (0 0, 100 0), (0 0, 100 0) )");
GeomPtr g(wktreader.read(wkt_in));
GeomPtr expected(wktreader.read(wkt_ex));
GeomPtr simplified = DouglasPeuckerSimplifier::simplify(
g.get(), 10.0);
ensure( simplified->isValid() );
ensure( simplified->equalsExact(expected.get()) );
}
// 10 - GeometryCollection
template<>
template<>
void object::test<10>()
{
std::string wkt_in("GEOMETRYCOLLECTION ( \
MULTIPOINT (80 200, 240 200, 240 60, 80 60, 80 200, 140 199, 120 120), \
POLYGON ((80 200, 240 200, 240 60, 80 60, 80 200)), \
LINESTRING (80 200, 240 200, 240 60, 80 60, 80 200, 140 199, 120 120) )");
std::string wkt_ex("MULTILINESTRING( (0 0, 100 0), (0 0, 100 0) )");
GeomPtr g(wktreader.read(wkt_in));
GeomPtr expected(wktreader.read(wkt_ex));
GeomPtr simplified = DouglasPeuckerSimplifier::simplify(
g.get(), 10.0);
ensure( simplified->isValid() );
// Non simplification occurs
ensure( simplified->equalsExact(g.get()) );
}
} // namespace tut
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