public static Matrix multiply(Matrix a, Matrix b) {
if (a.getWidth() != b.getHeight())
throw new ArrayIndexOutOfBoundsException("Matrix size mismatch!");
Matrix result = new Matrix(a.getHeight(), b.getWidth());
for (int x = 0; x < result.getWidth(); x++) {
for (int y = 0; y < result.getHeight(); y++) {
for (int i = 0; i < a.getWidth(); i++) {
result.data[x][y] += (a.data[i][y] * b.data[x][i]);
}
}
}
return result;
}
public Matrix subtract(Matrix m) {
if (m.getWidth() != getWidth() || m.getHeight() != getHeight())
throw new ArrayIndexOutOfBoundsException("Matrix size mismatch!");
for (int x = 0; x < getWidth(); x++) {
for (int y = 0; y < getHeight(); y++) {
data[x][y] -= m.data[x][y];
}
}
return this;
}
@Override
public boolean equals(Object o) {
if (o instanceof Matrix) {
Matrix m = (Matrix) o;
if (m.getWidth() == getWidth() && m.getHeight() == getHeight()) {
return Arrays.deepEquals(m.data, data);
}
}
return false;
}