mirror of
https://github.com/jhasse/poly2tri.git
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264 lines
8.4 KiB
C++
264 lines
8.4 KiB
C++
#if !defined(_WIN32) && !defined(BOOST_TEST_DYN_LINK)
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#define BOOST_TEST_DYN_LINK
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#endif
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#define BOOST_TEST_MODULE Poly2triTest
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#include <poly2tri/poly2tri.h>
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#include <boost/filesystem/path.hpp>
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#include <boost/test/unit_test.hpp>
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#include <fstream>
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#include <iostream>
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#include <iterator>
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#include <stdexcept>
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BOOST_AUTO_TEST_CASE(BasicTest)
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{
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std::vector<p2t::Point*> polyline{
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new p2t::Point(0, 0),
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new p2t::Point(1, 0),
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new p2t::Point(1, 1),
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};
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p2t::CDT cdt{ polyline };
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BOOST_CHECK_NO_THROW(cdt.Triangulate());
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const auto result = cdt.GetTriangles();
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BOOST_REQUIRE_EQUAL(result.size(), 1);
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BOOST_CHECK_EQUAL(*result[0]->GetPoint(0), *polyline[0]);
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BOOST_CHECK_EQUAL(*result[0]->GetPoint(1), *polyline[1]);
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BOOST_CHECK_EQUAL(*result[0]->GetPoint(2), *polyline[2]);
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BOOST_CHECK(p2t::IsDelaunay(result));
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for (const auto p : polyline) {
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delete p;
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}
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}
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BOOST_AUTO_TEST_CASE(QuadTest)
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{
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std::vector<p2t::Point*> polyline{ new p2t::Point(0, 0), new p2t::Point(0, 1),
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new p2t::Point(1, 1), new p2t::Point(1, 0) };
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p2t::CDT cdt{ polyline };
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BOOST_CHECK_NO_THROW(cdt.Triangulate());
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const auto result = cdt.GetTriangles();
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BOOST_REQUIRE_EQUAL(result.size(), 2);
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BOOST_CHECK(p2t::IsDelaunay(result));
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for (const auto p : polyline) {
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delete p;
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}
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}
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BOOST_AUTO_TEST_CASE(NarrowQuadTest)
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{
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// Very narrow quad that used to demonstrate a failure case during
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// triangulation
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std::vector<p2t::Point*> polyline {
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new p2t::Point(0.0, 0.0),
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new p2t::Point(1.0e-05, 0.0),
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new p2t::Point(1.1e-04, 3.0e-07),
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new p2t::Point(1.0e-04, 3.0e-07)
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};
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p2t::CDT cdt{ polyline };
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BOOST_CHECK_NO_THROW(cdt.Triangulate());
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const auto result = cdt.GetTriangles();
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BOOST_REQUIRE_EQUAL(result.size(), 2);
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BOOST_CHECK(p2t::IsDelaunay(result));
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for (const auto p : polyline) {
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delete p;
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}
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}
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BOOST_AUTO_TEST_CASE(ConcaveBoundaryTest)
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{
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// Concave-by-less-than-epsilon boundaries used to potentially fail
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// during triangulation
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const double eps = 1e-15; // This gave EdgeEvent - null triangle
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std::vector<p2t::Point*> polyline {
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new p2t::Point(0,0),
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new p2t::Point(0.5,eps),
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new p2t::Point(1,0),
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new p2t::Point(1-eps,0.836541),
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new p2t::Point(1,2),
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new p2t::Point(.46,1.46+eps),
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new p2t::Point(0,1),
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new p2t::Point(eps,0.5)
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};
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const double r2o4 = std::sqrt(2.)/4;
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std::vector<p2t::Point*> hole {
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new p2t::Point(0.5+r2o4,0.5),
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new p2t::Point(0.5,0.5+r2o4),
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new p2t::Point(0.5-r2o4,0.5),
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new p2t::Point(0.5-eps,0.5-r2o4)
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};
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std::vector<p2t::Point> interior_points
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{{0.21,0.79},{0.21,0.21},{0.79,0.21}};
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p2t::CDT cdt{ polyline };
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cdt.AddHole(hole);
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for (auto & p : interior_points)
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cdt.AddPoint(&p);
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BOOST_CHECK_NO_THROW(cdt.Triangulate());
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const auto result = cdt.GetTriangles();
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BOOST_REQUIRE_EQUAL(result.size(), 18);
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BOOST_CHECK(p2t::IsDelaunay(result));
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for (const auto p : polyline) {
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delete p;
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}
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for (const auto p : hole) {
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delete p;
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}
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}
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BOOST_AUTO_TEST_CASE(PolygonTest01)
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{
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// Reported in issue #10
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std::vector<p2t::Point*> polyline = {
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new p2t::Point(-0.388419120000000006598384061363, 0.0368141516905975269002837535481),
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new p2t::Point(-0.388419120000000006598384061363, 0.0104235565411950892311665484158),
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new p2t::Point(-0.611580879999999993401615938637, 0.0104235565411950892311665484158),
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new p2t::Point(-0.611580879999999993401615938637, 0.1483950316905975341796875),
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new p2t::Point(-0.578899596898762469621146919962, 0.227294628589359948289683188705),
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new p2t::Point(-0.500000000000000000000000000000, 0.259975911690597527581303438637),
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new p2t::Point(+0.500000000000000000000000000000, 0.259975911690597527581303438637),
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new p2t::Point(+0.578899596898762469621146919962, 0.227294628589359948289683188705),
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new p2t::Point(+0.611580879999999993401615938637, 0.1483950316905975341796875),
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new p2t::Point(+0.611580879999999993401615938637, 0.0104235565411950614755909327869),
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new p2t::Point(+0.388419120000000006598384061363, 0.0104235565411950892311665484158),
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new p2t::Point(+0.388419120000000006598384061363, 0.0368141516905975130224959457337)
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};
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p2t::CDT cdt{ polyline };
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BOOST_CHECK_NO_THROW(cdt.Triangulate());
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const auto result = cdt.GetTriangles();
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BOOST_REQUIRE_EQUAL(result.size(), 10);
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for (const auto p : polyline) {
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delete p;
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}
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}
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BOOST_AUTO_TEST_CASE(PolygonTest02)
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{
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// Reported in issue #10
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std::vector<p2t::Point*> polyline = {
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new p2t::Point(0.9636984967276516, 0.7676550649687783),
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new p2t::Point(0.9636984967276516, -0.7676550649687641),
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new p2t::Point(-0.3074475690811459, -0.7676550649687641),
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new p2t::Point(0.09401654924378076, -0.2590574983578904),
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new p2t::Point(0.10567230819363671, -0.09864698028880525),
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new p2t::Point(-0.03901177977841874, -0.028405214140875046),
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new p2t::Point(-0.428964921810446, -0.08483619470406722),
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new p2t::Point(-0.5128305980156834, -0.12847817634298053),
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new p2t::Point(-0.5512747518916774, -0.2148501697175078),
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new p2t::Point(-0.5917836778064418, -0.7037530067555622),
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new p2t::Point(-0.5520451065921502, -0.7676550649687641),
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new p2t::Point(-0.9636984967276516, -0.7676550649687641),
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new p2t::Point(-0.9636984967276516, 0.767655064968778)
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};
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p2t::CDT cdt{ polyline };
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BOOST_CHECK_NO_THROW(cdt.Triangulate());
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const auto result = cdt.GetTriangles();
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BOOST_REQUIRE_EQUAL(result.size(), 11);
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for (const auto p : polyline) {
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delete p;
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}
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}
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BOOST_AUTO_TEST_CASE(PolygonTest03)
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{
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// Reported in issue #10
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std::vector<p2t::Point*> polyline = {
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new p2t::Point(0.9776422201600001, 0.9776422201599928),
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new p2t::Point(0.9776422201599999, -0.977642220160007),
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new p2t::Point(-0.12788518519240472, -0.9776422201599928),
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new p2t::Point(-0.3913394510746002, -0.33861494064331055),
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new p2t::Point(-0.47812835166211676, -0.9776422201599928),
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new p2t::Point(-0.9776422201600001, -0.9776422201599928),
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new p2t::Point(-0.9776422201600001, 0.977642220160007)
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};
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p2t::CDT cdt{ polyline };
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BOOST_CHECK_NO_THROW(cdt.Triangulate());
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const auto result = cdt.GetTriangles();
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BOOST_REQUIRE_EQUAL(result.size(), 5);
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for (const auto p : polyline) {
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delete p;
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}
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}
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BOOST_AUTO_TEST_CASE(PolygonTest04)
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{
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std::vector<p2t::Point*> polyline {
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new p2t::Point(450, 2250),
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new p2t::Point(450, 1750),
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new p2t::Point(400, 1700),
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new p2t::Point(350, 1650),
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new p2t::Point(350, 500),
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new p2t::Point(1050, 1700)
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};
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std::vector<p2t::Point*> hole {
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new p2t::Point(980, 1636),
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new p2t::Point(950, 1600),
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new p2t::Point(650, 1230),
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new p2t::Point(625, 1247),
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new p2t::Point(600, 1250),
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new p2t::Point(591, 1350),
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new p2t::Point(550, 2050)
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};
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p2t::CDT cdt{ polyline };
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cdt.AddHole(hole);
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BOOST_CHECK_NO_THROW(cdt.Triangulate());
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const auto result = cdt.GetTriangles();
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BOOST_REQUIRE_EQUAL(result.size(), 13);
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for (const auto p : polyline) {
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delete p;
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}
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for (const auto p : hole) {
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delete p;
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}
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}
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BOOST_AUTO_TEST_CASE(TestbedFilesTest)
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{
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for (const auto& filename : { "custom.dat", "diamond.dat", "star.dat", "test.dat" }) {
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std::vector<p2t::Point*> polyline;
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// Load pointset from file
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// Parse and tokenize data file
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std::string line;
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#ifndef P2T_BASE_DIR
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const auto basedir = boost::filesystem::path(__FILE__).remove_filename().parent_path();
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#else
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const auto basedir = boost::filesystem::path(P2T_BASE_DIR);
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#endif
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const auto datafile = basedir / boost::filesystem::path("testbed/data") / boost::filesystem::path(filename);
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std::ifstream myfile(datafile.string());
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BOOST_REQUIRE(myfile.is_open());
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while (!myfile.eof()) {
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getline(myfile, line);
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if (line.empty()) {
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break;
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}
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std::istringstream iss(line);
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std::vector<std::string> tokens;
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copy(std::istream_iterator<std::string>(iss), std::istream_iterator<std::string>(),
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std::back_inserter<std::vector<std::string>>(tokens));
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double x = std::stod(tokens[0]);
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double y = std::stod(tokens[1]);
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polyline.push_back(new p2t::Point(x, y));
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}
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p2t::CDT cdt{ polyline };
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BOOST_CHECK_NO_THROW(cdt.Triangulate());
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const auto result = cdt.GetTriangles();
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BOOST_REQUIRE(result.size() * 3 > polyline.size());
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BOOST_CHECK_MESSAGE(p2t::IsDelaunay(result), filename + std::to_string(polyline.size()));
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for (const auto p : polyline) {
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delete p;
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}
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}
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}
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