/* * DoRayMe - a quick and dirty Raytracer * Pattern unit tests * * Created by Manoƫl Trapier * Copyright (c) 2020 986-Studio. * */ #include #include #include #include #include #include #include #include #include #include #include Colour black = Colour(0, 0, 0); Colour white = Colour(1, 1, 1); TEST(PatternTest, Creating_a_stripe_pattern) { StripPattern p = StripPattern(white, black); ASSERT_EQ(p.a, white); ASSERT_EQ(p.b, black); } TEST(PatternTest, A_strip_pattern_is_constant_in_y) { StripPattern p = StripPattern(white, black); ASSERT_EQ(p.patternAt(Point(0, 0, 0)), white); ASSERT_EQ(p.patternAt(Point(0, 1, 0)), white); ASSERT_EQ(p.patternAt(Point(0, 2, 0)), white); } TEST(PatternTest, A_strip_pattern_is_constant_in_z) { StripPattern p = StripPattern(white, black); ASSERT_EQ(p.patternAt(Point(0, 0, 0)), white); ASSERT_EQ(p.patternAt(Point(0, 0, 1)), white); ASSERT_EQ(p.patternAt(Point(0, 0, 2)), white); } TEST(PatternTest, A_strip_pattern_alternate_in_x) { StripPattern p = StripPattern(white, black); ASSERT_EQ(p.patternAt(Point(0, 0, 0)), white); ASSERT_EQ(p.patternAt(Point(0.9, 0, 0)), white); ASSERT_EQ(p.patternAt(Point(1, 0, 0)), black); ASSERT_EQ(p.patternAt(Point(-0.1, 0, 0)), black); ASSERT_EQ(p.patternAt(Point(-1, 0, 0)), black); ASSERT_EQ(p.patternAt(Point(-1.1, 0, 0)), white); } TEST(PatternTest, Lightning_with_a_pattern_applied) { Sphere s = Sphere(); Material m; StripPattern p = StripPattern(white, black); m.pattern = &p; m.ambient = 1; m.diffuse = 0; m.specular = 0; Tuple eyev = Vector(0, 0, -1); Tuple normalv = Vector(0, 0, -1); Light light = Light(POINT_LIGHT, Point(0, 0, -10), Colour(1, 1, 1)); Colour c1 = m.lighting(light, Point(0, 9, 0), eyev, normalv, &s, false); Colour c2 = m.lighting(light, Point(1, 1, 0), eyev, normalv, &s, false); ASSERT_EQ(c1, Colour(1, 1, 1)); ASSERT_EQ(c2, Colour(0, 0, 0)); } TEST(PatternTest, Stripe_with_an_object_transformation) { Sphere s = Sphere(); s.setTransform(scaling(2, 2, 2)); StripPattern pattern = StripPattern(white, black); Colour c = pattern.patternAtObject(&s, Point(1.5, 0, 0)); ASSERT_EQ(c, white); } TEST(PatternTest, Stripe_with_a_pattern_transformation) { Sphere s = Sphere(); StripPattern pattern = StripPattern(white, black); pattern.setTransform(scaling(2, 2, 2)); Colour c = pattern.patternAtObject(&s, Point(1.5, 0, 0)); ASSERT_EQ(c, white); } TEST(PatternTest, Stripe_with_both_an_object_and_a_pattern_transformation) { Sphere s = Sphere(); s.setTransform(scaling(2, 2, 2)); StripPattern pattern = StripPattern(white, black); pattern.setTransform(translation(0.5, 0, 0)); Colour c = pattern.patternAtObject(&s, Point(2.5, 0, 0)); ASSERT_EQ(c, white); } TEST(PatternTest, The_default_pattern_transformation) { TestPattern pattern = TestPattern(); ASSERT_EQ(pattern.transformMatrix, Matrix4().identity()); } TEST(PatternTest, Assigning_a_transformation) { TestPattern pattern = TestPattern(); pattern.setTransform(translation(1, 2, 3)); ASSERT_EQ(pattern.transformMatrix, translation(1, 2, 3)); } TEST(PatternTest, A_pattern_with_an_object_transformation) { Sphere s = Sphere(); s.setTransform(scaling(2, 2, 2)); TestPattern pattern = TestPattern(); Colour c = pattern.patternAtObject(&s, Point(2, 3, 4)); ASSERT_EQ(c, Colour(1, 1.5, 2)); } TEST(PatternTest, A_pattern_with_a_pattern_transformation) { Sphere s = Sphere(); TestPattern pattern = TestPattern(); pattern.setTransform(scaling(2, 2, 2)); Colour c = pattern.patternAtObject(&s, Point(2, 3, 4)); ASSERT_EQ(c, Colour(1, 1.5, 2)); } TEST(PatternTest, A_pattern_with_an_object_and_a_pattern_transformation) { Sphere s = Sphere(); s.setTransform(scaling(2, 2, 2)); TestPattern pattern = TestPattern(); pattern.setTransform(translation(0.5, 1, 1.5)); Colour c = pattern.patternAtObject(&s, Point(2.5, 3, 3.5)); ASSERT_EQ(c, Colour(0.75, 0.5, 0.25)); } TEST(PatternTest, A_gradient_linearly_interpolates_betweens_colors) { GradientPattern pattern = GradientPattern(white, black); ASSERT_EQ(pattern.patternAt(Point(0.25, 0, 0)), Colour(0.75, 0.75, 0.75)); ASSERT_EQ(pattern.patternAt(Point(0.5, 0, 0)), Colour(0.5, 0.5, 0.5)); ASSERT_EQ(pattern.patternAt(Point(0.75, 0, 0)), Colour(0.25, 0.25, 0.25)); } TEST(PatternTest, A_ring_should_extend_in_both_x_and_z) { RingPattern pattern = RingPattern(white, black); ASSERT_EQ(pattern.patternAt(Point(0, 0, 0)), white); ASSERT_EQ(pattern.patternAt(Point(1, 0, 0)), black); ASSERT_EQ(pattern.patternAt(Point(0, 0, 1)), black); /* 0.708 is just bit more than sqrt(2)/2 */ ASSERT_EQ(pattern.patternAt(Point(0.708, 0, 0.708)), black); } TEST(PatternTest, Checkers_should_repeat_in_x) { CheckersPattern pattern = CheckersPattern(white, black); ASSERT_EQ(pattern.patternAt(Point(0, 0, 0)), white); ASSERT_EQ(pattern.patternAt(Point(0.99, 0, 0)), white); ASSERT_EQ(pattern.patternAt(Point(1.01, 0, 0)), black); } TEST(PatternTest, Checkers_should_repeat_in_y) { CheckersPattern pattern = CheckersPattern(white, black); ASSERT_EQ(pattern.patternAt(Point(0, 0, 0)), white); ASSERT_EQ(pattern.patternAt(Point(0, 0.99, 0)), white); ASSERT_EQ(pattern.patternAt(Point(0, 1.01, 0)), black); } TEST(PatternTest, Checkers_should_repeat_in_z) { CheckersPattern pattern = CheckersPattern(white, black); ASSERT_EQ(pattern.patternAt(Point(0, 0, 0)), white); ASSERT_EQ(pattern.patternAt(Point(0, 0, 0.99)), white); ASSERT_EQ(pattern.patternAt(Point(0, 0, 1.01)), black); }