@Test
public void testRotate() {
System.out.println("rotate");
double angle = 6.0;
TransformationMatrix instance = new TransformationMatrix();
instance.rotate(angle);
double cos = Math.cos(angle);
double sin = Math.sin(angle);
TransformationMatrix instance2 = new TransformationMatrix();
instance2.getMatrix().getVx().setX(cos);