Anyone Know Some Java Or Processing?

I was trying to make an algorithm that detected line of sight in Processing, and ran into a few errors. The code runs fine but doesn't work like I want it to. Important part is shown in the box. How should I fix it?
@eeveelution
@I'm the Ice Guy
(Coder guys!)

Background Info:
The method I thought up uses a "signal" sent from one entity to another to detect line of sight. The signal, or check as I named it in the variables, goes between the player and the enemy in small intervals, always checking to see if it goes through a certain region. If the check ever passes through said region, it is supposed to recognize that the player and the enemy cannot "see" each other, and sets the boolean variable "sight" to false. I'm stumped as to how to make it false only if the check fails, and true if the check succeeds.

 

You'd have to use a raycast (aka raytrace) if you want to know if something is between the two, not sure if whatever libraries/engine you're using has that though but google should do the trick. Remember that the direction from a to b is b - a, and the distance is a simple enough formula too which you also can google. If you only want an area around the enemy where the player is considered seen even if behind cover, just check if the distance is less than the area's radius.

 

I only know the basics of java coding , like coding a custom command .

 

I was trying to make a system myself that doesn't have to do that, and I'm fairly certain I can get it to work but I need some advice on how to change it.

 

So you're doing actual LoS which tests for collision or just an Area of Sight which doesn't?

 

I'm making it test for collision, but i'm doing it by sending a "signal" and testing to see if it goes past a specific that's supposed to be a wall

 

Have you tried creating a custom function to make things simpler for you

 

I don't really know how to do that .3.

 

Im not sure if this is the same in java but the way I know it is:

define double-number (num):
doubled = num * num
return doubled

This is a peice of code to create a function called double-number
which doubles a number