Reflection? How do I do it?

Question

This is over my head, can someone explain it to me better? http://mathworld.wolfram.com/Reflection.html

I\'m making a 2d breakout fighting game, so I need the ball t

Answer 1

The prime (') indicates the second form of a number/point/structure. In this case, x₁' refers to the reflected form of x₁.

The subscript (₀) shows various states of the same. In this case, x₀ is the point of reflection.

The caret notation (^) shows that something is a vector. In this case, n̂ is the normal vector.