How I can know whether an object is seeing another object?

Questions & Answers
1

I have 2 objects, and i want a code to tell me if a object is seeing another object

tnx.

2

simplest way (not perfect though, as it checks only if the center of the object has a direct line of sight with other object) is to use a linecast.

var other : Transform;

function Update() {
    var hit : RaycastHit;

    if (LineCast(transform.position, other.position, hit)) {
        if (hit.transform == other) {
            Debug.Log("I see you!");
        }
    }
}