108 lines
2.3 KiB
C++
108 lines
2.3 KiB
C++
/*
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* DoRayMe - a quick and dirty Raytracer
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* Sphere unit tests
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*
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* Created by Manoël Trapier
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* Copyright (c) 2020 986-Studio.
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*
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*/
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#include <ray.h>
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#include <sphere.h>
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#include <transformation.h>
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#include <gtest/gtest.h>
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TEST(SphereTest, A_ray_intersect_a_sphere_at_two_points)
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{
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Ray r = Ray(Point(0, 0, -5), Vector(0, 0, 1));
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Sphere s = Sphere();
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Intersect xs = s.intersect(r);
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ASSERT_EQ(xs.count(), 2);
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ASSERT_EQ(xs[0].t, 4.0);
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ASSERT_EQ(xs[1].t, 6.0);
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}
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TEST(SphereTest, A_ray_intersect_a_sphere_at_a_tangent)
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{
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Ray r = Ray(Point(0, 1, -5), Vector(0, 0, 1));
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Sphere s = Sphere();
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Intersect xs = s.intersect(r);
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ASSERT_EQ(xs.count(), 2);
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ASSERT_EQ(xs[0].t, 5.0);
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ASSERT_EQ(xs[1].t, 5.0);
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}
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TEST(SphereTest, A_ray_miss_a_sphere)
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{
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Ray r = Ray(Point(0, 2, -5), Vector(0, 0, 1));
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Sphere s = Sphere();
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Intersect xs = s.intersect(r);
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ASSERT_EQ(xs.count(), 0);
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}
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TEST(SphereTest, A_ray_originate_inside_a_sphere)
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{
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Ray r = Ray(Point(0, 0, 0), Vector(0, 0, 1));
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Sphere s = Sphere();
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Intersect xs = s.intersect(r);
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ASSERT_EQ(xs.count(), 2);
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ASSERT_EQ(xs[0].t, -1.0);
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ASSERT_EQ(xs[1].t, 1.0);
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}
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TEST(SphereTest, A_sphere_is_behind_a_ray)
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{
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Ray r = Ray(Point(0, 0, 5), Vector(0, 0, 1));
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Sphere s = Sphere();
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Intersect xs = s.intersect(r);
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ASSERT_EQ(xs.count(), 2);
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ASSERT_EQ(xs[0].t, -6.0);
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ASSERT_EQ(xs[1].t, -4.0);
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}
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TEST(SphereTest, A_sphere_default_transformation)
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{
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Sphere s = Sphere();
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ASSERT_EQ(s.transformMatrix, Matrix4().identity());
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}
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TEST(SphereTest, Changing_a_sphere_transformation)
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{
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Sphere s = Sphere();
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Matrix t = translation(2, 3, 4);
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s.setTransform(t);
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ASSERT_EQ(s.transformMatrix, t);
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}
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TEST(SphereTest, Intersecting_a_scaled_sphere_with_a_ray)
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{
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Ray r = Ray(Point(0, 0, -5), Vector(0, 0, 1));
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Sphere s = Sphere();
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s.setTransform(scaling(2, 2, 2));
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Intersect xs = s.intersect(r);
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ASSERT_EQ(xs.count(), 2);
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ASSERT_EQ(xs[0].t, 3.0);
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ASSERT_EQ(xs[1].t, 7.0);
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}
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TEST(SphereTest, Intersecting_a_translated_sphere_with_a_ray)
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{
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Ray r = Ray(Point(0, 0, -5), Vector(0, 0, 1));
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Sphere s = Sphere();
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s.setTransform(translation(5, 0, 0));
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Intersect xs = s.intersect(r);
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ASSERT_EQ(xs.count(), 0);
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} |