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Throw in Triangle::NeighborAcross in case of null pointer

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Add an example quad for which the exception is throwni in the tests
This commit is contained in:
Pierre Dejoue 2020-05-21 16:14:10 +02:00
parent 06b0f14b29
commit 2c6bec64c0
3 changed files with 30 additions and 3 deletions
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12
poly2tri/common/shapes.cc
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@ -352,12 +352,18 @@ void Triangle::SetDelunayEdgeCW(const Point& p, bool e)
// The neighbor across to given point
Triangle& Triangle::NeighborAcross(const Point& opoint)
{
Triangle* neighbor = nullptr;
if (&opoint == points_[0]) {
return *neighbors_[0];
neighbor = neighbors_[0];
} else if (&opoint == points_[1]) {
return *neighbors_[1];
neighbor = neighbors_[1];
} else {
neighbor = neighbors_[2];
}
return *neighbors_[2];
if (neighbor == nullptr) {
throw std::runtime_error("NeighborAcross - null neighbor");
}
return *neighbor;
}
void Triangle::DebugPrint()

4
testbed/data/deadly_quad.dat Normal file
View File

@ -0,0 +1,4 @@
0.0 0.0
1.0e-05 0.0
1.1e-04 3.0e-07
1.0e-04 3.0e-07

17
unittest/main.cpp
View File

@ -5,6 +5,7 @@
#include <fstream>
#include <iostream>
#include <iterator>
#include <stdexcept>
BOOST_AUTO_TEST_CASE(BasicTest)
{
@ -40,6 +41,22 @@ BOOST_AUTO_TEST_CASE(QuadTest)
}
}
BOOST_AUTO_TEST_CASE(QuadTestThrow)
{
// Very narrow quad that demonstrates a failure case during triangulation
std::vector<p2t::Point*> polyline {
new p2t::Point(0.0, 0.0),
new p2t::Point(1.0e-05, 0.0),
new p2t::Point(1.1e-04, 3.0e-07),
new p2t::Point(1.0e-04, 3.0e-07)
};
p2t::CDT cdt{ polyline };
BOOST_CHECK_THROW(cdt.Triangulate(), std::runtime_error);
for (const auto p : polyline) {
delete p;
}
}
BOOST_AUTO_TEST_CASE(TestbedFilesTest)
{
for (const auto& filename : { "custom.dat", "diamond.dat", "star.dat", "test.dat" }) {