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Orange
2026-05-13 05:16:10 +03:00
parent 3ca657a048
commit c73afa95cc
2 changed files with 114 additions and 0 deletions
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tests/general/unit_test_line_tracer_obb.cpp
+56
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@@ -34,6 +34,13 @@ namespace
const auto s = std::sin(radians);
return OBB{center, {c, s, 0.f}, {-s, c, 0.f}, {0.f, 0.f, 1.f}, half_extents};
}
OBB rotated_around_y(const Vec3& center, const Vec3& half_extents, const float radians) noexcept
{
const auto c = std::cos(radians);
const auto s = std::sin(radians);
return OBB{center, {c, 0.f, -s}, {0.f, 1.f, 0.f}, {s, 0.f, c}, half_extents};
}
} // namespace
// --- axis-aligned OBB behaves like AABB ---
@@ -126,6 +133,18 @@ TEST(LineTracerOBBTests, RotatedBoxHitOnRotatedFace)
EXPECT_NEAR(hit.z, 0.f, 1e-4f);
}
TEST(LineTracerOBBTests, RotatedAroundYBoxHitOnRotatedFace)
{
const auto box = rotated_around_y({0.f, 0.f, 0.f}, {1.f, 1.f, 1.f}, std::numbers::pi_v<float> / 4.f);
const auto ray = make_ray({0.f, 0.f, 5.f}, {0.f, 0.f, -5.f});
const auto hit = LineTracer::get_ray_hit_point(ray, box);
EXPECT_NE(hit, ray.end);
EXPECT_NEAR(hit.x, 0.f, 1e-4f);
EXPECT_NEAR(hit.y, 0.f, 1e-4f);
EXPECT_NEAR(hit.z, std::numbers::sqrt2_v<float>, 1e-4f);
}
TEST(LineTracerOBBTests, RotatedBoxMissesWhereAabbWouldHit)
{
// A unit cube rotated 45° around Z has an XY footprint that is a diamond reaching
@@ -170,6 +189,43 @@ TEST(LineTracerOBBTests, RotatedAndTranslatedBoxHit)
EXPECT_NEAR(hit.y, 5.f, 1e-4f);
}
TEST(LineTracerOBBTests, RayStartsInsideRotatedBox)
{
const auto box = rotated_around_z({2.f, 3.f, 0.f}, {2.f, 1.f, 1.f}, std::numbers::pi_v<float> / 6.f);
const auto ray = make_ray({2.f, 3.f, 0.f}, {10.f, 3.f, 0.f});
const auto hit = LineTracer::get_ray_hit_point(ray, box);
EXPECT_NE(hit, ray.end);
EXPECT_NEAR(hit.x, 2.f, 1e-4f);
EXPECT_NEAR(hit.y, 3.f, 1e-4f);
EXPECT_NEAR(hit.z, 0.f, 1e-4f);
}
TEST(LineTracerOBBTests, TangentRayHitsRotatedBox)
{
const auto box = rotated_around_z({0.f, 0.f, 0.f}, {1.f, 1.f, 1.f}, std::numbers::pi_v<float> / 4.f);
const auto ray = make_ray({-5.f, std::numbers::sqrt2_v<float>, 0.f},
{5.f, std::numbers::sqrt2_v<float>, 0.f});
const auto hit = LineTracer::get_ray_hit_point(ray, box);
EXPECT_NE(hit, ray.end);
EXPECT_NEAR(hit.x, 0.f, 1e-4f);
EXPECT_NEAR(hit.y, std::numbers::sqrt2_v<float>, 1e-4f);
EXPECT_NEAR(hit.z, 0.f, 1e-4f);
}
TEST(LineTracerOBBTests, DegeneratePlaneBoxCanBeHit)
{
const auto box = axis_aligned_obb({0.f, 0.f, 0.f}, {1.f, 1.f, 0.f});
const auto ray = make_ray({0.f, 0.f, -5.f}, {0.f, 0.f, 5.f});
const auto hit = LineTracer::get_ray_hit_point(ray, box);
EXPECT_NE(hit, ray.end);
EXPECT_NEAR(hit.x, 0.f, 1e-4f);
EXPECT_NEAR(hit.y, 0.f, 1e-4f);
EXPECT_NEAR(hit.z, 0.f, 1e-4f);
}
TEST(LineTracerOBBTests, ParallelRayOutsideMisses)
{
// Ray runs parallel to a slab face, completely outside the slab.