public static Matrix_ ToMatrix(this Vector2 vec)
{
Matrix_ m = new Matrix_(new Vector2[, ] {
{ new Vector2(vec.X, 0) },
{ new Vector2(0, vec.Y) }
});
return(m);
}
public static Matrix_ Multiply(Matrix_ a, Matrix_ b)
{
Matrix_ m = new Matrix_(new Vector2[, ] {
{ new Vector2((a.matrix[0, 0].X * b.matrix[0, 0].X) + (a.matrix[0, 0].Y * b.matrix[1, 0].X),
(a.matrix[0, 0].X * b.matrix[0, 0].Y) + (a.matrix[0, 0].Y * b.matrix[1, 0].Y)) },
{ new Vector2((a.matrix[1, 0].X * b.matrix[0, 0].X) + (a.matrix[1, 0].Y * b.matrix[1, 0].X),
(a.matrix[1, 0].X * b.matrix[0, 0].Y) + (a.matrix[1, 0].Y * b.matrix[1, 0].Y)) }
});
return(m);
}
public static Matrix_ Scaler(Matrix_ a, float scaler)
{
for (int x = 0; x < a.matrix.GetLength(0); x++)
{
for (int y = 0; y < a.matrix.GetLength(1); y++)
{
a.matrix[x, y] *= scaler;
}
}
return(a);
}
public Matrix_ Inverse()
{
//2x2
float ad = matrix[0, 0].X * matrix[1, 0].Y;
float bc = matrix[0, 0].Y * matrix[1, 0].X;
float det = 1 / (ad - bc);
//new matrix
Matrix_ a = new Matrix_(new Vector2[, ] {
{ new Vector2(matrix[1, 0].Y, -matrix[0, 0].Y) },
{ new Vector2(-matrix[1, 0].X, matrix[0, 0].X) }
});
Matrix_ inverse = Scaler(a, det);
return(inverse);
}
public static Matrix_ Minus(Matrix_ a, Matrix_ b)
{
if (a.Order != b.Order)
{
return(null);
}
Matrix_ r = new Matrix_(a.order);
for (int x = 0; x < a.matrix.GetLength(0); x++)
{
for (int y = 0; y < a.matrix.GetLength(1); y++)
{
r.matrix[x, y] = a.matrix[x, y] - b.matrix[x, y];
}
}
return(r);
}
public static Matrix_ Translate(Matrix_ a, Matrix_ translation)
{
if (a.order != translation.order)
{
return(null);
}
Matrix_ r = new Matrix_(a.order);
for (int x = 0; x < a.order.X; x++)
{
for (int y = 0; y < a.order.Y; y++)
{
r.matrix[x, y] = new Vector2(a.matrix[x, y].X + translation.matrix[x, y].X,
a.matrix[x, y].Y + translation.matrix[x, y].Y);
}
}
return(r);
}
