currently i have using a framework and it has a function called distance2D, and it has this description:

> 
> Calculate the Euclidean distance
>  between two points (considering a
>  point as a vector object). Disregards
>  the Z component of the vectors and is
>  thus a little faster.
> 
> 
> 

and this is how i use it

```
if(g.getCenterPointGlobal().distance2D(target.getCenterPointGlobal()) > 1)
   System.out.println("Near");

```

i have totally no idea what a Euclidean distance is, i am thinking that it can be used to calculate how far 2 points are? because i am trying to compare distance between 2 objects and if they are near within a certain range i want to do something. how would i be able to use this?