81 lines
2.2 KiB
C++
81 lines
2.2 KiB
C++
#include "../../geom/aabb.hpp"
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#include "../../geom/plane.hpp"
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#include "../../geom/ray.hpp"
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#include "../../tap.hpp"
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using util::geom::ray2f;
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using util::geom::ray3f;
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//-----------------------------------------------------------------------------
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void
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test_intersect_plane (util::TAP::logger &tap)
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{
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// trivial case: origin ray facing z, plane at unit z facing -z.
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const util::geom::ray3f l (util::point3f {0,0,0}, util::vector3f {0,0, 1});
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const util::geom::plane3f p (util::point3f {0,0,1}, util::vector3f {0,0,-1});
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tap.expect_eq (distance (l, p), 1.f, "ray-plane intersect");
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}
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//-----------------------------------------------------------------------------
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void
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test_intersect_aabb (util::TAP::logger &tap)
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{
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using util::geom::aabb2f;
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// trivial case: unit aabb at origin, ray from (0.5,-0.5) upwards
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const aabb2f box {
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{ 0.f, 0.f },
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{ 1.f, 1.f }
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};
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const ray2f forward {
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util::point2f { 0.5f, -0.5f },
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util::vector2f { 0.0f, 1.0f }
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};
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tap.expect_eq (distance (forward, box), 0.5f, "ray-aabb intersect");
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const ray2f behind {
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util::point2f { 0.5f, 2.0f },
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util::vector2f { 0.0f, 1.0f }
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};
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tap.expect_eq (distance (behind, box), -1.f, "ray-aabb intersect behind");
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}
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//-----------------------------------------------------------------------------
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void
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test_intersect_sphere (util::TAP::logger &tap)
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{
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using util::geom::sphere3f;
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const sphere3f s = {{0.f, 0.f, 0.f}, 1.f};
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const ray3f r0 {util::point3f {0.f, 2.f, 0.f}, util::vector3f {0.f, -1.f, 0.f}};
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tap.expect_eq (distance (r0, s), 1.f, "ray-sphere simple");
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const ray3f r1 {util::point3f {0.f, 1.f, 0.f}, util::vector3f {0.f, 1.f, 0.f}};
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tap.expect_eq (distance (r1, s), 0.f, "ray-sphere adjacent");
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const ray3f r2 {util::point3f {0.f, 2.f, 0.f}, util::vector3f {0.f, 1.f, 0.f}};
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tap.expect_nan (distance (r2, s), "ray-sphere no-intersect");
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}
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//-----------------------------------------------------------------------------
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int
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main (void)
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{
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util::TAP::logger tap;
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test_intersect_plane (tap);
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test_intersect_aabb (tap);
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test_intersect_sphere (tap);
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return tap.status ();
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}
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