79 lines
2.9 KiB
C++
79 lines
2.9 KiB
C++
#include "engine/douglas_peucker.hpp"
|
|
|
|
#include <boost/test/unit_test.hpp>
|
|
#include <boost/test/test_case_template.hpp>
|
|
|
|
#include <osrm/coordinate.hpp>
|
|
|
|
#include <vector>
|
|
|
|
BOOST_AUTO_TEST_SUITE(douglas_peucker_simplification)
|
|
|
|
using namespace osrm;
|
|
using namespace osrm::engine;
|
|
|
|
BOOST_AUTO_TEST_CASE(removed_middle_test)
|
|
{
|
|
/*
|
|
x
|
|
/ \
|
|
x \
|
|
/ \
|
|
x x
|
|
*/
|
|
std::vector<util::FixedPointCoordinate> coordinates = {
|
|
util::FixedPointCoordinate(5 * COORDINATE_PRECISION, 5 * COORDINATE_PRECISION),
|
|
util::FixedPointCoordinate(6 * COORDINATE_PRECISION, 6 * COORDINATE_PRECISION),
|
|
util::FixedPointCoordinate(10 * COORDINATE_PRECISION, 10 * COORDINATE_PRECISION),
|
|
util::FixedPointCoordinate(5 * COORDINATE_PRECISION, 15 * COORDINATE_PRECISION)};
|
|
|
|
// FIXME this test fails for everything below z4 because the DP algorithms
|
|
// only used a naive distance measurement
|
|
//for (unsigned z = 0; z < detail::DOUGLAS_PEUCKER_THRESHOLDS_SIZE; z++)
|
|
for (unsigned z = 0; z < 2; z++)
|
|
{
|
|
auto result = douglasPeucker(coordinates, z);
|
|
BOOST_CHECK_EQUAL(result.size(), 3);
|
|
BOOST_CHECK_EQUAL(result[0], coordinates[0]);
|
|
BOOST_CHECK_EQUAL(result[1], coordinates[2]);
|
|
BOOST_CHECK_EQUAL(result[2], coordinates[3]);
|
|
}
|
|
}
|
|
|
|
BOOST_AUTO_TEST_CASE(remove_second_node_test)
|
|
{
|
|
for (unsigned z = 0; z < detail::DOUGLAS_PEUCKER_THRESHOLDS_SIZE; z++)
|
|
{
|
|
/*
|
|
x--x
|
|
| \
|
|
x-x x
|
|
|
|
|
x
|
|
*/
|
|
std::vector<util::FixedPointCoordinate> input = {
|
|
util::FixedPointCoordinate(5 * COORDINATE_PRECISION, 5 * COORDINATE_PRECISION),
|
|
util::FixedPointCoordinate(5 * COORDINATE_PRECISION,
|
|
5 * COORDINATE_PRECISION +
|
|
detail::DOUGLAS_PEUCKER_THRESHOLDS[z]),
|
|
util::FixedPointCoordinate(10 * COORDINATE_PRECISION, 10 * COORDINATE_PRECISION),
|
|
util::FixedPointCoordinate(10 * COORDINATE_PRECISION,
|
|
10 + COORDINATE_PRECISION +
|
|
detail::DOUGLAS_PEUCKER_THRESHOLDS[z] * 2),
|
|
util::FixedPointCoordinate(5 * COORDINATE_PRECISION, 15 * COORDINATE_PRECISION),
|
|
util::FixedPointCoordinate(5 * COORDINATE_PRECISION +
|
|
detail::DOUGLAS_PEUCKER_THRESHOLDS[z],
|
|
15 * COORDINATE_PRECISION),
|
|
};
|
|
BOOST_TEST_MESSAGE("Threshold (" << z << "): " << detail::DOUGLAS_PEUCKER_THRESHOLDS[z]);
|
|
auto result = douglasPeucker(input, z);
|
|
BOOST_CHECK_EQUAL(result.size(), 4);
|
|
BOOST_CHECK_EQUAL(input[0], result[0]);
|
|
BOOST_CHECK_EQUAL(input[2], result[1]);
|
|
BOOST_CHECK_EQUAL(input[3], result[2]);
|
|
BOOST_CHECK_EQUAL(input[5], result[3]);
|
|
}
|
|
}
|
|
|
|
BOOST_AUTO_TEST_SUITE_END()
|