How to check for Vector3 in C#?

Question

C++ / C#

There is an outlon point (Vector3 class variable), how can I make a condition so that if the player crosses the line, the radius of this point is 10.5f?
I managed to make a similar if condition only if the player is exactly on the point itself, but how to do this only with a radius of 10.5f ?



PS the user variable is the player.
user.position - player's location along XY Z axes.
outlon - point with XY Z coordinates.

Answer 1

Just check distance between points:

var dist = Mathf.Abs(Vector3.Distance(outlon, user.position));
if (dist<10.5f) // попал

Answer 2

Then check not exactly exactly (==), but greater than or less than (>= ; <=).