166 lines
3.8 KiB
C++
166 lines
3.8 KiB
C++
/*
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* DoRayMe - a quick and dirty Raytracer
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* Shape 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 <shape.h>
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#include <testshape.h>
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#include <matrix.h>
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#include <group.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(ShapeTest, The_default_transformation)
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{
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TestShape s = TestShape();
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ASSERT_EQ(s.transformMatrix, Matrix4().identity());
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}
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TEST(ShapeTest, Assigning_a_transformation)
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{
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TestShape s = TestShape();
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s.setTransform(translation(2, 3, 4));
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ASSERT_EQ(s.transformMatrix, translation(2, 3, 4));
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}
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TEST(ShapeTest, The_default_material)
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{
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TestShape s = TestShape();
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ASSERT_EQ(s.material, Material());
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}
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TEST(ShapeTest, Assigning_a_material)
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{
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TestShape s = TestShape();
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Material m = Material();
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m.ambient = 1;
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s.material = m;
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ASSERT_EQ(s.material, m);
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}
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TEST(ShapeTest, Intersecting_a_scaled_shape_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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TestShape s = TestShape();
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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(s.localRay.origin, Point(0, 0, -2.5));
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ASSERT_EQ(s.localRay.direction, Vector(0, 0, 0.5));
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}
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TEST(ShapeTest, Intersecting_a_translated_shape_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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TestShape s = TestShape();
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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(s.localRay.origin, Point(-5, 0, -5));
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ASSERT_EQ(s.localRay.direction, Vector(0, 0, 1));
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}
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TEST(ShapeTest, Computing_the_normal_on_a_translated_shape)
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{
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TestShape s = TestShape();
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s.setTransform(translation(0, 1, 0));
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Tuple n = s.normalAt(Point(0, 1.70711, -0.70711));
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/* Temporary lower the precision */
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set_equal_precision(0.00001);
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ASSERT_EQ(n, Vector(0, 0.70711, -0.70711));
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set_equal_precision(FLT_EPSILON);
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}
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TEST(ShapeTest, Computing_the_normal_on_a_tranformed_shape)
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{
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TestShape s = TestShape();
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s.setTransform(scaling(1, 0.5, 1) * rotationZ(M_PI / 5));
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Tuple n = s.normalAt(Point(0, sqrt(2)/2, -sqrt(2)/2));
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/* Temporary lower the precision */
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set_equal_precision(0.00001);
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ASSERT_EQ(n, Vector(0, 0.97014, -0.24254));
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set_equal_precision(FLT_EPSILON);
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}
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TEST(ShapeTest, A_shape_has_a_parent_attribute)
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{
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TestShape s = TestShape();
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ASSERT_EQ(s.parent, nullptr);
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}
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TEST(TestShape, Converting_a_point_from_world_to_object_space)
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{
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Group g1 = Group();
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g1.setTransform(rotationY(M_PI / 2));
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Group g2 = Group();
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g2.setTransform(scaling(2, 2, 2));
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g1.addObject(&g2);
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Sphere s = Sphere();
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s.setTransform(translation(5, 0, 0));
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g2.addObject(&s);
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Tuple p = s.worldToObject(Point(-2, 0, -10));
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ASSERT_EQ(p, Point(0, 0, -1));
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}
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TEST(TestShape, Converting_a_normal_form_object_to_world_space)
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{
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Group g1 = Group();
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g1.setTransform(rotationY(M_PI / 2));
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Group g2 = Group();
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g2.setTransform(scaling(1, 2, 3));
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g1.addObject(&g2);
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Sphere s = Sphere();
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s.setTransform(translation(5, 0, 0));
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g2.addObject(&s);
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Tuple p = s.normalToWorld(Vector(sqrt(3)/3, sqrt(3)/3, sqrt(3)/3));
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/* Temporary lower the precision */
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set_equal_precision(0.0001);
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ASSERT_EQ(p, Vector(0.2857, 0.4286, -0.8571));
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set_equal_precision(FLT_EPSILON);
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}
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TEST(TestShape, Finding_the_normal_on_a_child_object)
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{
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Group g1 = Group();
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g1.setTransform(rotationY(M_PI / 2));
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Group g2 = Group();
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g2.setTransform(scaling(1, 2, 3));
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g1.addObject(&g2);
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Sphere s = Sphere();
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s.setTransform(translation(5, 0, 0));
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g2.addObject(&s);
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Tuple p = s.normalAt(Point(1.7321, 1.1547, -5.5774));
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/* Temporary lower the precision */
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set_equal_precision(0.0001);
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ASSERT_EQ(p, Vector(0.2857, 0.4286, -0.8571));
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set_equal_precision(FLT_EPSILON);
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} |