public TwoByTwoMatrix Add(TwoByTwoMatrix secondMatrix)
{
var resultMatrix = new TwoByTwoMatrix(this.Element00 + secondMatrix.Element00,
this.Element01 + secondMatrix.Element01, this.Element10 + secondMatrix.Element10,
this.Element11 + secondMatrix.Element11);
return(resultMatrix);
}
public TwoByTwoMatrix Subtract(TwoByTwoMatrix secondMatrix)
{
var resultMatrix = new TwoByTwoMatrix(this.Element00 - secondMatrix.Element00,
this.Element01 - secondMatrix.Element01, this.Element10 - secondMatrix.Element10,
this.Element11 - secondMatrix.Element11);
return(resultMatrix);
}
public TwoByTwoMatrix Multiply(TwoByTwoMatrix secondMatrix)
{
double resultElement00 = (this.Element00 * secondMatrix.Element00) + (this.Element01 * secondMatrix.Element10);
double resultElement01 = (this.Element00 * secondMatrix.Element01) + (this.Element01 * secondMatrix.Element11);
double resultElement10 = (this.Element10 * secondMatrix.Element00) + (this.Element11 * secondMatrix.Element10);
double resultElement11 = (this.Element10 * secondMatrix.Element01) + (this.Element11 * secondMatrix.Element11);
var resultMatrix = new TwoByTwoMatrix(resultElement00, resultElement01,
resultElement10, resultElement11);
return(resultMatrix);
}
public TwoByTwoMatrix GetInverse()
{
double determinant = this.GetDeterminant();
// Matrix with determinant 0 does not have an inverse matrix
if (determinant == 0)
{
return(null);
}
var inverseMatrix = new TwoByTwoMatrix(this.Element11 / determinant,
-this.Element01 / determinant, -this.Element10 / determinant, this.Element00 / determinant);
return(inverseMatrix);
}
