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Code Issues 157 Wiki Activity

feat(track): the foot of the ballast stays on the ground as designed

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Rails, sleepers and the top of the ballast go with the unevenness, the
slope of the ballast takes up the difference.
This commit is contained in:
maj00r
2026-10-31 18:27:19 +01:00
parent 6aed9ec5bd
commit 3dbe8a75f8
6 changed files with 31 additions and 4 deletions
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12
tests/unit/test_track_uneven.cpp
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@@ -165,6 +165,18 @@ TEST_CASE("uneven track: the value along a track meets its neighbours exactly")
}
}
TEST_CASE("uneven track: the foot of the ballast stays where it was")
{
double const rail{0.18};
double const height{0.38};
CHECK(track_uneven::bed_share(0.0, rail, height) == doctest::Approx(1.0)); // rail top
CHECK(track_uneven::bed_share(rail, rail, height) == doctest::Approx(1.0)); // top of the ballast
CHECK(track_uneven::bed_share(rail + 0.5 * height, rail, height) == doctest::Approx(0.5));
CHECK(track_uneven::bed_share(rail + height, rail, height) == doctest::Approx(0.0)); // its foot
CHECK(track_uneven::bed_share(rail + 2.0 * height, rail, height) == doctest::Approx(0.0));
CHECK(track_uneven::bed_share(rail + 1.0, rail, 0.0) == doctest::Approx(1.0)); // no ballast
}
TEST_CASE("uneven track: the rails dip around a joint")
{
CHECK(track_uneven::dip(0.0) == doctest::Approx(1.0));