Box collision detection and bouncing

Question

I\'m making pong, and am finding it really difficult to write an algorithm that bounces the ball off the four walls properly (I will deal with scoring later on, because only par

Answer 1

You can look at this in 2 ways:

Angles: If you know the angle the ball is colliding at, just perform 180 - angle to find the new angle.

Gradient: Probably simpler. You must be moving the ball at a certain dY and dX every t milliseconds. so if you hit the wall you can simply play with inverting signs of dY and dX. For example if you hit the right wall, dX becomes -dX while dY continues on its course.