var target : Transform;
    function Update () {
        if (!Physics.Linecast (transform.position, target.position)) {
            ProcessData.AndDoSomeCalculations();
        }
    }

using UnityEngine;
using System.Collections;

public class example : MonoBehaviour {
    public Transform target;
    void Update() {
        if (!Physics.Linecast(transform.position, target.position))
            ProcessData.AndDoSomeCalculations();
        
    }
}

import UnityEngine
import System.Collections

class example(MonoBehaviour):

    public target as Transform

    def Update():
        if not Physics.Linecast(transform.position, target.position):
            ProcessData.AndDoSomeCalculations()