SphereCastAll sees for miles

Questions & Answers
1

Hey Guys and Girls,

I am using this line of code

hits = Physics.SphereCastAll(transform.position,transform.localScale.x / 3,playerTransform.position - transform.position, Vector3.Distance(playerTransform.position, transform.position));

to help me enemies spot me!

It works fine and all, but it does mean they can see me from literally hundreds of miles away. I tried writing the code like this,

	hits = Physics.SphereCastAll(transform.position,transform.localScale.x / 3,playerTransform.position - transform.position, 10000f);

but then they don’t seem to see me at all, I have to get right in there face for it to work!

Can anyone suggest what I am doing wrong.

Thanks in advance!

3

You can use another approach with first checking distance between your player and the enemy:

if(Vector3.Distance(player.position, enemy.position) < range)
{}

then you check for a linecast between the two:

if (!Physics.Linecast (enemy.position, player.position, layerMask)) 
{}

My advice, place a GO at the level of the eyes of the enemy and use it as starting point.
The layerMask will ignore the enemy itself if the linecast is starting from inside a collider of the enemy.

You can see more here unitygems.com - unitygems Resources and Information.
The article also includes line of sight so that the enemy does not see you when you are behind him.

2

Hi Mr Steve,

One approach many people use is a sphere collider set to Is Trigger?. You then have an OnTriggerEnter() function call the “Attack” function.

I personally tend to use a combination of dot and distance, but I cant remember the exact script (@work) - if required I will post it when I get home.