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Question by Juri · Oct 17, 2010 at 02:27 PM · physicsraycastai

Physics.Raycast AI problem

function Update () { var hit : RaycastHit; var inSight = false var playerRelativPos =myTransform.position - target.position; if(Physics.Raycast(transform.position , playerRelativPos, hit, 1)) { if(hit.transform == GameObject.FindWithTag("Player")) { inSight = true; } what is wrong in this raycast function? it is not changing the car insight on true... I need all of the help i can get!!!

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Answer by Loius · Oct 17, 2010 at 03:29 PM

You're raycasting backwards; you want

playerRelativePos = target.position - myTransform.position;

Use the 101-010 button with code selected to format it so people can read it.

It's more efficient to test if ( hit.transform == target ) than to use a Find function in an Update loop.

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avatar image Juri · Oct 18, 2010 at 10:48 AM 0
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Thanks for the tip, but it is not working! here is the whole script I use as an AI:

var target : Transform; var moveSpeed = 3; var rotationSpeed = 3; var hunt : boolean = false; var myTransform : Transform; var distance : int; var hit : RaycastHit; var inSight : boolean = false;

function Awake() { myTransform = transform; }

function Start() { target = GameObject.FindWithTag("Player").transform;

}

function Update () {

 dist = (transform.position - target.position).magnitude;
 if(dist < distance){
     hunt = true;
 }
 else{
     hunt = false;
 }
 var playerRelativPos =target.position - myTransform.position;
 if(Physics.Raycast(transform.position , playerRelativPos, hit, 1)) {
     if(hit.transform ==target) {
         inSight = true;
     }
 }

 if(hunt == true && inSight == true){

 myTransform.rotation = Quaternion.Slerp(myTransform.rotation,
 Quaternion.LookRotation(target.position - myTransform.position), rotationSpeed*Time.deltaTime);


 myTransform.position += myTransform.forward * moveSpeed * Time.deltaTime;
 }

}

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