173 lines
4.1 KiB
C++
173 lines
4.1 KiB
C++
/*
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* DoRayMe - a quick and dirty Raytracer
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* Matric 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 <matrix.h>
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#include <tuples.h>
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#include <math.h>
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#include <gtest/gtest.h>
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TEST(MatrixTest, Constructing_and_inspecting_a_4x4_Matrix)
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{
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double values[] = {1, 2, 3, 4,
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5.5, 6.5, 7.5, 8.5,
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9, 10, 11, 12,
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13.5, 14.5, 15.5, 16.5};
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Matrix4 m = Matrix4(values);
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ASSERT_EQ(m.get(0, 0), 1);
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ASSERT_EQ(m.get(0, 3), 4);
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ASSERT_EQ(m.get(1, 0), 5.5);
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ASSERT_EQ(m.get(1, 2), 7.5);
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ASSERT_EQ(m.get(2, 2), 11);
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ASSERT_EQ(m.get(3, 0), 13.5);
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ASSERT_EQ(m.get(3, 2), 15.5);
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}
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TEST(MatrixTest, A_2x2_matric_ought_to_be_representable)
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{
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double values[] = {-3, 5,
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1, -2};
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Matrix2 m = Matrix2(values);
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ASSERT_EQ(m.get(0, 0), -3);
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ASSERT_EQ(m.get(0, 1), 5);
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ASSERT_EQ(m.get(1, 0), 1);
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ASSERT_EQ(m.get(1, 1), -2);
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}
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TEST(MatrixTest, A_3x3_matric_ought_to_be_representable)
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{
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double values[] = {-3, 5, 0,
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1, -2, -7,
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0, 1, 1};
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Matrix3 m = Matrix3(values);
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ASSERT_EQ(m.get(0, 0), -3);
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ASSERT_EQ(m.get(1, 1), -2);
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ASSERT_EQ(m.get(2, 2), 1);
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}
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TEST(MatrixTest, Matrix_equality_with_identical_matrix)
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{
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double values1[] = {1, 2, 3, 4,
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5, 6, 7, 8,
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9, 8, 7, 6,
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5, 4, 3, 2};
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double values2[] = {1, 2, 3, 4,
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5, 6, 7, 8,
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9, 8, 7, 6,
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5, 4, 3, 2};
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Matrix4 A = Matrix4(values1);
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Matrix4 B = Matrix4(values2);
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ASSERT_EQ(A, B);
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}
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TEST(MatrixTest, Matrix_equality_with_different_matrix)
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{
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double values1[] = {1, 2, 3, 4,
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5, 6, 7, 8,
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9, 8, 7, 6,
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5, 4, 3, 2};
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double values2[] = {2, 3, 4, 5,
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6, 7, 8, 9,
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8, 7, 6, 5,
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4, 3, 2, 1};
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Matrix4 A = Matrix4(values1);
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Matrix4 B = Matrix4(values2);
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ASSERT_NE(A, B);
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}
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TEST(MatrixTest, Multiplying_two_matrices)
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{
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double values1[] = {1, 2, 3, 4,
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5, 6, 7, 8,
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9, 8, 7, 6,
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5, 4, 3, 2};
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double values2[] = {-2, 1, 2, 3,
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3, 2, 1, -1,
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4, 3, 6, 5,
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1, 2, 7, 8};
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double results[] = {20, 22, 50, 48,
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44, 54, 114, 108,
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40, 58, 110, 102,
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16, 26, 46, 42};
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Matrix4 A = Matrix4(values1);
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Matrix4 B = Matrix4(values2);
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ASSERT_EQ(A * B, Matrix4(results));
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}
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TEST(MatrixTest, A_matrix_multiplyed_by_a_tuple)
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{
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double valuesA[] = {1, 2, 3, 4,
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2, 4, 4, 2,
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8, 6, 4, 1,
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0, 0, 0, 1};
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Matrix4 A = Matrix4(valuesA);
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Tuple b = Tuple(1, 2, 3, 1);
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ASSERT_EQ(A * b, Tuple(18, 24, 33, 1));
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}
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TEST(MatrixTest, Multiplying_a_matrix_by_the_identity_matrix)
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{
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double valuesA[] = {0, 1, 2, 4,
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1, 2, 4, 8,
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2, 4, 8, 16,
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4, 8, 16, 32};
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Matrix4 A = Matrix4(valuesA);
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Matrix ident = Matrix4().identity();
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ASSERT_EQ(A * ident, A);
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}
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TEST(MatrixTest, Multiplying_the_identity_matrix_by_a_tuple)
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{
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Tuple a = Tuple(1, 2, 3, 4);
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Matrix ident = Matrix4().identity();
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ASSERT_EQ(ident * a, a);
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}
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TEST(MatrixTest, Transposing_a_matrix)
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{
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double valuesA[] = {0, 9, 3, 0,
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9, 8, 0, 8,
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1, 8, 5, 3,
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0, 0, 5, 8};
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double results[] = {0, 9, 1, 0,
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9, 8, 8, 0,
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3, 0, 5, 5,
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0, 8, 3, 8};
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Matrix A = Matrix4(valuesA);
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ASSERT_EQ(A.transpose(), Matrix4(results));
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}
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TEST(MatrixTest, Transposing_this_identity_matrix)
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{
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Matrix ident = Matrix4().identity();
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ASSERT_EQ(ident.transpose(), ident);
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} |