133 lines
2.7 KiB
C++
133 lines
2.7 KiB
C++
/*
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* DoRayMe - a quick and dirty Raytracer
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* Group 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 <intersect.h>
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#include <intersection.h>
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#include <group.h>
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#include <testshape.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(GroupTest, Creating_a_new_group)
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{
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Group g = Group();
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ASSERT_EQ(g.transformMatrix, Matrix4().identity());
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ASSERT_TRUE(g.isEmpty());
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}
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TEST(GroupTest, Adding_a_child_to_a_group)
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{
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Group g = Group();
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TestShape s = TestShape();
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g.addObject(&s);
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ASSERT_FALSE(g.isEmpty());
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ASSERT_EQ(s.parent, &g);
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ASSERT_EQ(g[0], &s);
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}
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TEST(GroupTest, Intersecting_a_ray_with_an_empty_group)
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{
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Group g = Group();
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Ray r = Ray(Point(0, 0, 0), Vector(0, 0, 1));
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Intersect xs = g.intersect(r);
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ASSERT_EQ(xs.count(), 0);
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}
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TEST(GroupTest, Intersecting_a_ray_with_an_nonempty_group)
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{
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Group g = Group();
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Sphere s1 = Sphere();
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Sphere s2 = Sphere();
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Sphere s3 = Sphere();
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s2.setTransform(translation(0, 0, -3));
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s3.setTransform(translation(5, 0, 0));
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g.addObject(&s1);
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g.addObject(&s2);
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g.addObject(&s3);
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Ray r = Ray(Point(0, 0, -5), Vector(0, 0, 1));
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Intersect xs = g.intersect(r);
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ASSERT_EQ(xs.count(), 4);
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EXPECT_EQ(xs[0].object, &s2);
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EXPECT_EQ(xs[1].object, &s2);
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EXPECT_EQ(xs[2].object, &s1);
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EXPECT_EQ(xs[3].object, &s1);
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}
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TEST(GroupTest, Intersecting_a_transformed_group)
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{
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Group g = Group();
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Sphere s = Sphere();
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g.setTransform(scaling(2, 2, 2));
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s.setTransform(translation(5, 0, 0));
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g.addObject(&s);
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Ray r = Ray(Point(10, 0, -50), Vector(0, 0, 1));
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Intersect xs = g.intersect(r);
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ASSERT_EQ(xs.count(), 2);
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}
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TEST(GroupTest, Group_bounding_box)
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{
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Group g = Group();
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Sphere s = Sphere();
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g.setTransform(scaling(2, 2, 2));
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s.setTransform(translation(5, 0, 0));
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g.addObject(&s);
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BoundingBox b = BoundingBox(Point(8, -2, -2), Point(12, 2, 2));
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BoundingBox res = g.getBounds();
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ASSERT_EQ(res.min, b.min);
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ASSERT_EQ(res.max, b.max);
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}
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TEST(GroupTest, Removing_an_object)
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{
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Group g = Group();
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Sphere s1 = Sphere();
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Sphere s2 = Sphere();
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Sphere s3 = Sphere();
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s1.setTransform(translation(-1, 0, 0));
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s2.setTransform(scaling(0.5, 0.5, 0.5));
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g.addObject(&s1);
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g.addObject(&s2);
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ASSERT_EQ(g.getObjectCount(), 2);
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ASSERT_EQ(*(g[0]), s1);
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ASSERT_EQ(*(g[1]), s2);
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g.removeObject(&s1);
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ASSERT_EQ(g.getObjectCount(), 1);
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ASSERT_EQ(*(g[0]), s2);
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ASSERT_EQ(g[1], nullptr);
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g.removeObject(&s3);
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ASSERT_EQ(g.getObjectCount(), 1);
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g.removeObject(&s2);
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ASSERT_EQ(g.getObjectCount(), 0);
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ASSERT_EQ(g[0], nullptr);
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}
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