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- /*
- * DoRayMe - a quick and dirty Raytracer
- * Shape unit tests
- *
- * Created by Manoël Trapier
- * Copyright (c) 2020 986-Studio.
- *
- */
- #include <shape.h>
- #include <testshape.h>
- #include <matrix.h>
- #include <group.h>
- #include <sphere.h>
- #include <transformation.h>
- #include <gtest/gtest.h>
- TEST(ShapeTest, The_default_transformation)
- {
- TestShape s = TestShape();
- ASSERT_EQ(s.transformMatrix, Matrix4().identity());
- }
- TEST(ShapeTest, Assigning_a_transformation)
- {
- TestShape s = TestShape();
- s.setTransform(translation(2, 3, 4));
- ASSERT_EQ(s.transformMatrix, translation(2, 3, 4));
- }
- TEST(ShapeTest, The_default_material)
- {
- TestShape s = TestShape();
- ASSERT_EQ(s.material, Material());
- }
- TEST(ShapeTest, Assigning_a_material)
- {
- TestShape s = TestShape();
- Material m = Material();
- m.ambient = 1;
- s.material = m;
- ASSERT_EQ(s.material, m);
- }
- TEST(ShapeTest, Intersecting_a_scaled_shape_with_a_ray)
- {
- Ray r = Ray(Point(0, 0, -5), Vector(0, 0, 1));
- TestShape s = TestShape();
- s.setTransform(scaling(2, 2, 2));
- Intersect xs = s.intersect(r);
- ASSERT_EQ(s.localRay.origin, Point(0, 0, -2.5));
- ASSERT_EQ(s.localRay.direction, Vector(0, 0, 0.5));
- }
- TEST(ShapeTest, Intersecting_a_translated_shape_with_a_ray)
- {
- Ray r = Ray(Point(0, 0, -5), Vector(0, 0, 1));
- TestShape s = TestShape();
- s.setTransform(translation(5, 0, 0));
- Intersect xs = s.intersect(r);
- ASSERT_EQ(s.localRay.origin, Point(-5, 0, -5));
- ASSERT_EQ(s.localRay.direction, Vector(0, 0, 1));
- }
- TEST(ShapeTest, Computing_the_normal_on_a_translated_shape)
- {
- TestShape s = TestShape();
- s.setTransform(translation(0, 1, 0));
- Tuple n = s.normalAt(Point(0, 1.70711, -0.70711));
- /* Temporary lower the precision */
- set_equal_precision(0.00001);
- ASSERT_EQ(n, Vector(0, 0.70711, -0.70711));
- set_equal_precision(FLT_EPSILON);
- }
- TEST(ShapeTest, Computing_the_normal_on_a_tranformed_shape)
- {
- TestShape s = TestShape();
- s.setTransform(scaling(1, 0.5, 1) * rotationZ(M_PI / 5));
- Tuple n = s.normalAt(Point(0, sqrt(2)/2, -sqrt(2)/2));
- /* Temporary lower the precision */
- set_equal_precision(0.00001);
- ASSERT_EQ(n, Vector(0, 0.97014, -0.24254));
- set_equal_precision(FLT_EPSILON);
- }
- TEST(ShapeTest, A_shape_has_a_parent_attribute)
- {
- TestShape s = TestShape();
- ASSERT_EQ(s.parent, nullptr);
- }
- TEST(ShapeTest, Converting_a_point_from_world_to_object_space)
- {
- Group g1 = Group();
- g1.setTransform(rotationY(M_PI / 2));
- Group g2 = Group();
- g2.setTransform(scaling(2, 2, 2));
- g1.addObject(&g2);
- Sphere s = Sphere();
- s.setTransform(translation(5, 0, 0));
- g2.addObject(&s);
- Tuple p = s.worldToObject(Point(-2, 0, -10));
- ASSERT_EQ(p, Point(0, 0, -1));
- }
- TEST(ShapeTest, Converting_a_normal_form_object_to_world_space)
- {
- Group g1 = Group();
- g1.setTransform(rotationY(M_PI / 2));
- Group g2 = Group();
- g2.setTransform(scaling(1, 2, 3));
- g1.addObject(&g2);
- Sphere s = Sphere();
- s.setTransform(translation(5, 0, 0));
- g2.addObject(&s);
- Tuple p = s.normalToWorld(Vector(sqrt(3)/3, sqrt(3)/3, sqrt(3)/3));
- /* Temporary lower the precision */
- set_equal_precision(0.0001);
- ASSERT_EQ(p, Vector(0.2857, 0.4286, -0.8571));
- set_equal_precision(FLT_EPSILON);
- }
- TEST(ShapeTest, Finding_the_normal_on_a_child_object)
- {
- Group g1 = Group();
- g1.setTransform(rotationY(M_PI / 2));
- Group g2 = Group();
- g2.setTransform(scaling(1, 2, 3));
- g1.addObject(&g2);
- Sphere s = Sphere();
- s.setTransform(translation(5, 0, 0));
- g2.addObject(&s);
- Tuple p = s.normalAt(Point(1.7321, 1.1547, -5.5774));
- /* Temporary lower the precision */
- set_equal_precision(0.0001);
- ASSERT_EQ(p, Vector(0.2857, 0.4286, -0.8571));
- set_equal_precision(FLT_EPSILON);
- }
- TEST(ShapeTest, Test_the_bouding_box_of_the_test_shape)
- {
- TestShape t = TestShape();
- BoundingBox b = BoundingBox(Point(-1, -1, -1), Point(1, 1, 1));
- BoundingBox res = t.getBounds();
- ASSERT_EQ(res.min, b.min);
- ASSERT_EQ(res.max, b.max);
- }
- TEST(ShapeTest, Test_the_bouding_box_of_the_scaled_shape)
- {
- TestShape t = TestShape();
- t.setTransform(scaling(3, 3, 3));
- BoundingBox b = BoundingBox(Point(-3, -3, -3), Point(3, 3, 3));
- BoundingBox res = t.getBounds();
- ASSERT_EQ(res.min, b.min);
- ASSERT_EQ(res.max, b.max);
- }
- TEST(ShapeTest, Test_the_bouding_box_of_the_translated_shape)
- {
- TestShape t = TestShape();
- t.setTransform(translation(10, 0, 0));
- BoundingBox b = BoundingBox(Point(9, -1, -1), Point(11, 1, 1));
- BoundingBox res = t.getBounds();
- ASSERT_EQ(res.min, b.min);
- ASSERT_EQ(res.max, b.max);
- }
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