need help with Raycast and GUIText

Questions & Answers
1

Hello there people! I love this forum, I spend soooo much time reading it, but never post… Until now…

Ok here’s my problem, Im of course really new, to coding, and Im starting in JS. I have all ready finished one game, but I done most of it with triggers & colliders, now Im am trying to start a new project with Raycasting…

What I would like to accomplish is to look at an object (a palm tree…) and have a guitext show up. I managed to do it having a gui text on each object and enableing it on and off, but I know from my last game that this is not a very optimised way of doing this.

I’ve tried this (no laughing guy!:roll:

function Update () 
{

var fwd = transform.TransformDirection(Vector3.forward);
var hit : RaycastHit; 
Debug.DrawRay(transform.position, fwd * 10, Color.green);

if(Physics.Raycast(transform.position, fwd, hit, 10))
{

if(hit.collider.gameObject.name == "PalmCollider")
{
hit.collider.gameObject.guiText.text = "Palm Tree";
Debug.DrawRay(transform.position, fwd * 10, Color.blue);
} 
else
{
hit.collider.gameObject.guiText.text = "";
}
}
}

But it only shows the text of the 2nd object, what have I done wrong? I have tried some other solutions saving the guiText in a inspector variable, but no cigar.

many thanks in advance for any help regarding this issue!

Cheers guys! Keep it up!

I’ve just realised that I only get a response from the last item in the script, even if I put 4 objects, the text only works on the last one… This raycasting is really kinda tricky…

2

It’s probably working right, but since every hit you replace the GUIText text, it will only shows the last hitted item. In your case, better use RaycastAll:

public var text : GUIText;
 
function Update () 
{

 var fwd = transform.TransformDirection(Vector3.forward);
 var hit : RaycastHit; 
 var nameList : String;

 Debug.DrawRay(transform.position, fwd * 10, Color.green);
 nameList = "";
 for(hit in Physics.RaycastAll(transform.position, fwd, 10))
 {
  if(hit.collider.gameObject.name == "PalmCollider")
  {
   nameList = "Palm Tree" + "

" + nameList;
Debug.DrawRay(transform.position, fwd * 10, Color.blue);
}
}
text.text = nameList;
}

This way, when you put this script in a GameObject, It will have a field to put a GUIText Object. Just create one and drag it to the “text” field an test it :slight_smile:

3

thanks a lot!!! work a charm! Just for a quick mental note, what is the "
" for?

Thanks again, your a star! :wink:

4

sorry, but one last thing… ejem… xD.

What it be correct to use the code in this way:

#pragma strict

public var text : GUIText;

function Update () 
{

 var fwd = transform.TransformDirection(Vector3.forward);
 var hit : RaycastHit; 
 var nameList : String;

 Debug.DrawRay(transform.position, fwd * 10, Color.green);
 nameList = "";
 for(hit in Physics.RaycastAll(transform.position, fwd, 10))
 {
  if(hit.collider.gameObject.name == "PalmCollider")
  {
   nameList = "Palmera" + "

" + nameList;
Debug.DrawRay(transform.position, fwd * 10, Color.blue);
}
}

 for(hit in Physics.RaycastAll(transform.position, fwd, 10))
 {
  if(hit.collider.gameObject.name == "WoodenBox")
  {
   nameList = "Caja de Madera" + "

" + nameList;
Debug.DrawRay(transform.position, fwd * 10, Color.blue);
}
}

  for(hit in Physics.RaycastAll(transform.position, fwd, 10))
 {
  if(hit.collider.gameObject.name == "dingy")
  {
   nameList = "Bote Salvavidas" + "

" + nameList;
Debug.DrawRay(transform.position, fwd * 10, Color.blue);
}
}

 text.text = nameList;
}

I meen, repeating the action over and over again for each object? Or should I take a different aproach? thanks again astorga, you was very helpfull!