Question

I have two questions:

1. If I have the following code:

   private boolean handleCollision(Rectangle_Double test)
   {
       Rectangle_Double s = test;
       s.setLocation(s.X+xVelocity, s.Y);
   }
   

am I modifying the passed in Rectangle_Double? If so, what would be the best way to copy the passed in Rectangle_Double and modify it?

Second, If I were to code this in python like so:

def handleCollision(collidedLands, testRectangle)
    s = testRectangle
    s.setLocation(s.X+xVelocity, s.Y)

am I modifying the passed in testRectangle? If so, what would be the best way to copy the passed in testRectangle and modify it?

Thanks!

Answer 1

I don’t speak Java, but to answer the Python questions:

1. Yes, you are modifying testRectangle.

2. If you wish not to modify it, make a new rectangle and return that.

Something like this, assuming you have a constructor for rectangles:

def handleCollision(collidedLands, testRectangle):
    newRectangle = Rectangle(testRectangle.X + xVelocity, testRectangle.Y)
    return newRectangle