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Added SrtmTileManager::GetBilinearHeight.

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Signed-off-by: Viktor Govako <viktor.govako@gmail.com>
This commit is contained in:
Viktor Govako
2023-02-23 18:55:07 -03:00
committed by zyphlar
parent 23f8a73ef6
commit 8dc633bfd9
7 changed files with 59 additions and 29 deletions
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14
generator/generator_tests/srtm_parser_test.cpp
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@@ -87,21 +87,23 @@ UNIT_TEST(SRTM_TileTest)
double const len = 1.0 / (sz - 1);
TEST_EQUAL(tile.GetHeight({0, 0}), 4, ());
TEST_EQUAL(tile.GetTriangleHeight({0, 0}), 4, ());
TEST_ALMOST_EQUAL_ULPS(tile.GetTriangleHeight({0, 0}), 4.0, ());
TEST_ALMOST_EQUAL_ULPS(tile.GetBilinearHeight({0, 0}), 4.0, ());
TEST_EQUAL(tile.GetHeight({len, len}), 2, ());
TEST_EQUAL(tile.GetTriangleHeight({len, len}), 2, ());
TEST_ALMOST_EQUAL_ULPS(tile.GetTriangleHeight({len, len}), 2.0, ());
TEST_ALMOST_EQUAL_ULPS(tile.GetBilinearHeight({len, len}), 2.0, ());
// Key difference here: GetHeight snaps on the nearest node, while GetTriangleHeight calculates
// from the nearest nodes' triangle.
double l = len / 2;
Altitude h = tile.GetHeight({l, l});
TEST(h == 4 || h == 2, (h));
TEST_EQUAL(tile.GetTriangleHeight({l, l}), 3, ());
TEST_ALMOST_EQUAL_ULPS(tile.GetTriangleHeight({l, l}), 3.0, ());
TEST_ALMOST_EQUAL_ULPS(tile.GetBilinearHeight({l, l}), 3.0, ());
l = 3 * len + len / 2;
h = tile.GetHeight({l, l});
TEST(h == -4 || h == -2, (h));
TEST_EQUAL(tile.GetTriangleHeight({l, l}), -3, ());
TEST_ALMOST_EQUAL_ULPS(tile.GetTriangleHeight({l, l}), -3.0, ());
TEST_ALMOST_EQUAL_ULPS(tile.GetBilinearHeight({l, l}), -3.0, ());
}
/*