public void When_Multiplying_Two_Matrices_Matrix_With_Result_Is_Returned()
{
//Arrange
Matrix4 matrixOne = new Matrix4(1.0, 2.0, 3.0, 4.0, 2.0, 3.0, 4.0, 1.0, 3.0, 4.0, 1.0, 2.0, 4.0, 1.0, 2.0, 3.0);
Matrix4 matrixTwo = new Matrix4(1.0, 2.0, 5.0, 3.0, 3.0, 5.0, 4.0, 1.0, 1.0, 3.0, 2.0, 4.0, 2.0, 4.0, 1.0, 5.0);
//Act
Matrix4 result = matrixOne.Multiply(matrixTwo);
//Assert
Assert.AreEqual(18.0, result.XX);
Assert.AreEqual(37.0, result.XY);
Assert.AreEqual(23.0, result.XZ);
Assert.AreEqual(37.0, result.XW);
Assert.AreEqual(17.0, result.YX);
Assert.AreEqual(35.0, result.YY);
Assert.AreEqual(31.0, result.YZ);
Assert.AreEqual(30.0, result.YW);
Assert.AreEqual(20.0, result.ZX);
Assert.AreEqual(37.0, result.ZY);
Assert.AreEqual(35.0, result.ZZ);
Assert.AreEqual(27.0, result.ZW);
Assert.AreEqual(15.0, result.WX);
Assert.AreEqual(31.0, result.WY);
Assert.AreEqual(31.0, result.WZ);
Assert.AreEqual(36.0, result.WW);
}
public void When_Multiplying_A_Matrix_By_A_Scalar_Matrix_With_Result_Is_Returned()
{
//Arrange
Matrix4 matrixOne = new Matrix4(1.0, 2.0, 3.0, 4.0, 2.0, 3.0, 4.0, 5.0, 3.0, 4.0, 5.0, 6.0, 4.0, 5.0, 6.0, 7.0);
double scalarOne = 2.0;
//Act
Matrix4 result = matrixOne.Multiply(scalarOne);
//Assert
Assert.AreEqual(2.0, result.XX);
Assert.AreEqual(4.0, result.XY);
Assert.AreEqual(6.0, result.XZ);
Assert.AreEqual(8.0, result.XW);
Assert.AreEqual(4.0, result.YX);
Assert.AreEqual(6.0, result.YY);
Assert.AreEqual(8.0, result.YZ);
Assert.AreEqual(10.0, result.YW);
Assert.AreEqual(6.0, result.ZX);
Assert.AreEqual(8.0, result.ZY);
Assert.AreEqual(10.0, result.ZZ);
Assert.AreEqual(12.0, result.ZW);
Assert.AreEqual(8.0, result.WX);
Assert.AreEqual(10.0, result.WY);
Assert.AreEqual(12.0, result.WZ);
Assert.AreEqual(14.0, result.WW);
}