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quaternion: compare test results using sum-of-differences

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comparison of floating point values is inexact and there isn't an easy
way for providing an ULP delta via the TAP interface. morever, the
general expected error is too large to reliably express in ULPs.
This commit is contained in:
Danny Robson 2016-08-15 20:54:01 +10:00
parent 7b4ece207b
commit 45795a1ae0
1 changed files with 11 additions and 8 deletions
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19
test/quaternion.cpp
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@ -76,20 +76,23 @@ main (void)
for (size_t i = 0; i < elems (ROTATIONS); ++i) {
const auto &r = ROTATIONS[i];
tap.expect_eq (quaternionf::rotation (r.mag, r.axis).as_matrix (),
util::matrix4f::rotation (r.mag, r.axis),
"single basis rotation %zu", i);
auto q = quaternionf::rotation (r.mag, r.axis).as_matrix ();
auto m = util::matrix4f::rotation (r.mag, r.axis);
auto diff = util::abs (q - m);
tap.expect_lt (util::sum (diff), 1e-6f, "single basis rotation %zu", i);
}
auto q_total = quaternionf::IDENTITY;
auto m_total = util::matrix4f::IDENTITY;
auto q = quaternionf::IDENTITY;
auto m = util::matrix4f::IDENTITY;
for (auto r: ROTATIONS) {
q_total = q_total.rotation (r.mag, r.axis) * q_total;
m_total = m_total.rotation (r.mag, r.axis) * m_total;
q = q.rotation (r.mag, r.axis) * q;
m = m.rotation (r.mag, r.axis) * m;
}
tap.expect_eq (q_total.as_matrix (), m_total, "chained single axis rotations");
auto diff = util::abs (q.as_matrix () - m);
tap.expect_lt (util::sum (diff), 1e-6f, "chained single axis rotations");
}
return tap.status ();