Simple question regarding top down RPG controller

Hello all,

So I have a very simple question regarding top down RPG controllers. Basically my question is, if using GetAxis for the controls, what is the best equation to limit the maxSpeed of moveAmount.x and moveAmount.y

Currently, I'm comparing each moveAmount to the maxSoeed, by basically running something like

Code (csharp):

1.  
2. moveAmount.x = Mathf.Min(moveAmount.x, maxSpeed);
3.  

My question is, what is the best way to ensure hat moveAmount.x + moveAmount.y does not exceed the maxSpeed

Thanks!

 

I would use Pythagorus theorem like this:

Code (csharp):

1. float moveAmountSquared = moveAmount.x * moveAmount.x + moveAmount.y * moveAmount.y;
2. if (moveAmountSquared > maxSpeed * maxSpeed) {
3.   scale = maxSpeed / Mathf.Sqrt(moveAmountSquared);
4.   moveAmount.x = scale * moveAmount.x;
5.   moveAmount.y = scale * moveAmount.y;
6. }

 

Thank you so much. I knew it was something simple. It's so funny how the most fundamental aspects of games tend to be the most difficult to grasp conceptually.