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104 lines
3.2 KiB
C++
104 lines
3.2 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 demonstrates a failure case during 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_THROW(cdt.Triangulate(), std::runtime_error);
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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(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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