TEST(TEST_TITLE, IdentityCheck)
{
Mat4f mat;
mat.SetAsIdentity();
for (int i = 0; i < 4; i++)
{
for (int j = 0; j < 4; j++)
{
if (i == j)
EXPECT_EQ(mat[i][j], 1);
else
EXPECT_EQ(mat[i][j], 0);
}
}
}
TEST(TEST_TITLE, MultiplicationCheck)
{
Mat4f a = { { 1, 2, 3, 4 },{ 5, 6, 7, 8 },{ 9, 10, 11, 12 },{ 13, 14, 15, 16 } };
Mat4f b = { { 1, 5, 9, 13 },{ 2, 6, 10, 14 },{ 3, 7, 11, 15 },{ 4, 8, 12, 16 } };
Mat4f i; // identity
i.SetAsIdentity();
// check for identity rule
EXPECT_TRUE(b * i == b);
EXPECT_TRUE(i * b == b);
EXPECT_TRUE(a * i == a);
EXPECT_TRUE(i * a == a);
EXPECT_TRUE(i * i == i);
Mat4f result = { {30, 70, 110, 150}, {70, 174, 278, 382}, {110, 278, 446, 614}, {150, 382, 614, 846} };
EXPECT_TRUE((a * b) == result);
}