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//
// Test Suite for geos::noding::SegmentPointComparator class.
//
// Ports tests found in jts/junit/noding/SegmentPointComparatorTest.java
// and jts/junit/noding/SegmentPointComparatorFullTest.java
#include <tut/tut.hpp>
// geos
#include <geos/noding/SegmentNode.h>
#include <geos/noding/SegmentPointComparator.h>
#include <geos/noding/SegmentString.h>
#include <geos/noding/Octant.h>
#include <geos/geom/PrecisionModel.h>
#include <geos/geom/LineSegment.h>
#include <geos/geom/Coordinate.h>
#include <geos/geom/CoordinateSequence.h>
// std
#include <memory>
namespace tut {
//
// Test Group
//
// Common data used by tests
struct test_segmentpointcomparator_data {
typedef std::unique_ptr<geos::geom::CoordinateSequence>
CoordinateSequenceAutoPtr;
typedef std::unique_ptr<geos::noding::SegmentString>
SegmentStringAutoPtr;
typedef geos::geom::Coordinate Coordinate;
typedef geos::geom::LineSegment LineSegment;
typedef geos::geom::PrecisionModel PrecisionModel;
PrecisionModel pm;
test_segmentpointcomparator_data()
: pm(1.0)
{}
void
checkNodePosition(int octant, double x0, double y0,
double x1, double y1, int
expectedPositionValue)
{
using geos::noding::SegmentPointComparator;
int posValue = SegmentPointComparator::compare(octant,
Coordinate(x0, y0),
Coordinate(x1, y1)
);
ensure(posValue == expectedPositionValue);
}
void
checkNodePosition(const LineSegment& seg, const Coordinate& p0,
const Coordinate& p1, int expectedPositionValue)
{
using geos::noding::Octant;
using geos::noding::SegmentPointComparator;
int octant = Octant::octant(seg.p0, seg.p1);
int posValue = SegmentPointComparator::compare(octant, p0, p1);
ensure(posValue == expectedPositionValue);
}
Coordinate
computePoint(const LineSegment& seg, double dist)
{
double dx = seg.p1.x - seg.p0.x;
double dy = seg.p1.y - seg.p0.y;
double len = seg.getLength();
Coordinate pt(dist * dx / len, dist * dy / len);
pm.makePrecise(pt);
return pt;
}
void
checkPointsAtDistance(const LineSegment& seg,
double dist0, double dist1)
{
using geos::geom::Coordinate;
Coordinate p0 = computePoint(seg, dist0);
Coordinate p1 = computePoint(seg, dist1);
if(p0.equals(p1)) {
checkNodePosition(seg, p0, p1, 0);
}
else {
checkNodePosition(seg, p0, p1, -1);
checkNodePosition(seg, p1, p0, 1);
}
}
void
checkSegment(double x, double y)
{
Coordinate seg0(0, 0);
Coordinate seg1(x, y);
LineSegment seg(seg0, seg1);
for(int i = 0; i < 4; i++) {
double dist = i;
double gridSize = 1 / pm.getScale();
checkPointsAtDistance(seg, dist, dist + 1.0 * gridSize);
checkPointsAtDistance(seg, dist, dist + 2.0 * gridSize);
checkPointsAtDistance(seg, dist, dist + 3.0 * gridSize);
checkPointsAtDistance(seg, dist, dist + 4.0 * gridSize);
}
}
};
typedef test_group<test_segmentpointcomparator_data> group;
typedef group::object object;
group test_segmentpointcomparator_group("geos::noding::SegmentPointComparator");
//
// Test Cases
//
// testOctant0 (from simple unit test)
template<>
template<>
void object::test<1>
()
{
checkNodePosition(0, 1, 1, 2, 2, -1);
checkNodePosition(0, 1, 0, 1, 1, -1);
}
// testQuadrant0
template<>
template<>
void object::test<2>
()
{
checkSegment(100, 0);
checkSegment(100, 50);
checkSegment(100, 100);
checkSegment(100, 150);
checkSegment(0, 100);
}
// testQuadrant4
template<>
template<>
void object::test<3>
()
{
checkSegment(100, -50);
checkSegment(100, -100);
checkSegment(100, -150);
checkSegment(0, -100);
}
// testQuadrant1
template<>
template<>
void object::test<4>
()
{
checkSegment(-100, 0);
checkSegment(-100, 50);
checkSegment(-100, 100);
checkSegment(-100, 150);
}
// testQuadrant2
template<>
template<>
void object::test<5>
()
{
checkSegment(-100, 0);
checkSegment(-100, -50);
checkSegment(-100, -100);
checkSegment(-100, -150);
}
} // namespace tut
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