/* * DoRayMe - a quick and dirty Raytracer * Matric unit tests * * Created by Manoƫl Trapier * Copyright (c) 2020 986-Studio. * */ #include #include #include #include TEST(MatrixTest, Constructing_and_inspecting_a_4x4_Matrix) { double values[] = {1, 2, 3, 4, 5.5, 6.5, 7.5, 8.5, 9, 10, 11, 12, 13.5, 14.5, 15.5, 16.5}; Matrix4 m = Matrix4(values); ASSERT_EQ(m.get(0, 0), 1); ASSERT_EQ(m.get(0, 3), 4); ASSERT_EQ(m.get(1, 0), 5.5); ASSERT_EQ(m.get(1, 2), 7.5); ASSERT_EQ(m.get(2, 2), 11); ASSERT_EQ(m.get(3, 0), 13.5); ASSERT_EQ(m.get(3, 2), 15.5); } TEST(MatrixTest, A_2x2_matric_ought_to_be_representable) { double values[] = {-3, 5, 1, -2}; Matrix2 m = Matrix2(values); ASSERT_EQ(m.get(0, 0), -3); ASSERT_EQ(m.get(0, 1), 5); ASSERT_EQ(m.get(1, 0), 1); ASSERT_EQ(m.get(1, 1), -2); } TEST(MatrixTest, A_3x3_matric_ought_to_be_representable) { double values[] = {-3, 5, 0, 1, -2, -7, 0, 1, 1}; Matrix3 m = Matrix3(values); ASSERT_EQ(m.get(0, 0), -3); ASSERT_EQ(m.get(1, 1), -2); ASSERT_EQ(m.get(2, 2), 1); } TEST(MatrixTest, Matrix_equality_with_identical_matrix) { double values1[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 8, 7, 6, 5, 4, 3, 2}; double values2[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 8, 7, 6, 5, 4, 3, 2}; Matrix4 A = Matrix4(values1); Matrix4 B = Matrix4(values2); ASSERT_EQ(A, B); } TEST(MatrixTest, Matrix_equality_with_different_matrix) { double values1[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 8, 7, 6, 5, 4, 3, 2}; double values2[] = {2, 3, 4, 5, 6, 7, 8, 9, 8, 7, 6, 5, 4, 3, 2, 1}; Matrix4 A = Matrix4(values1); Matrix4 B = Matrix4(values2); ASSERT_NE(A, B); } TEST(MatrixTest, Multiplying_two_matrices) { double values1[] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 8, 7, 6, 5, 4, 3, 2}; double values2[] = {-2, 1, 2, 3, 3, 2, 1, -1, 4, 3, 6, 5, 1, 2, 7, 8}; double results[] = {20, 22, 50, 48, 44, 54, 114, 108, 40, 58, 110, 102, 16, 26, 46, 42}; Matrix4 A = Matrix4(values1); Matrix4 B = Matrix4(values2); ASSERT_EQ(A * B, Matrix4(results)); } TEST(MatrixTest, A_matrix_multiplyed_by_a_tuple) { double valuesA[] = {1, 2, 3, 4, 2, 4, 4, 2, 8, 6, 4, 1, 0, 0, 0, 1}; Matrix4 A = Matrix4(valuesA); Tuple b = Tuple(1, 2, 3, 1); ASSERT_EQ(A * b, Tuple(18, 24, 33, 1)); } TEST(MatrixTest, Multiplying_a_matrix_by_the_identity_matrix) { double valuesA[] = {0, 1, 2, 4, 1, 2, 4, 8, 2, 4, 8, 16, 4, 8, 16, 32}; Matrix4 A = Matrix4(valuesA); Matrix ident = Matrix4().identity(); ASSERT_EQ(A * ident, A); } TEST(MatrixTest, Multiplying_the_identity_matrix_by_a_tuple) { Tuple a = Tuple(1, 2, 3, 4); Matrix ident = Matrix4().identity(); ASSERT_EQ(ident * a, a); } TEST(MatrixTest, Transposing_a_matrix) { double valuesA[] = {0, 9, 3, 0, 9, 8, 0, 8, 1, 8, 5, 3, 0, 0, 5, 8}; double results[] = {0, 9, 1, 0, 9, 8, 8, 0, 3, 0, 5, 5, 0, 8, 3, 8}; Matrix A = Matrix4(valuesA); ASSERT_EQ(A.transpose(), Matrix4(results)); } TEST(MatrixTest, Transposing_this_identity_matrix) { Matrix ident = Matrix4().identity(); ASSERT_EQ(ident.transpose(), ident); }