Limiting screen area for raycast

Unity Engine
,
1

hey everyone

say i am using a ray to point for a position of an object,

on my left side of my screen i have a bar full of GUI buttons, lets say the bar is a total of 50 px wide.

my issue is when i tap on the GUI buttons it still calls the ray under it and moves the position of the object.

How can i go about limiting or “ignoring” those 50 pxs of the right side of the screen from the raycast?

2

put the point to ray function under an if statement that asks if the touch.position is within a rect that is the size and area of the portion of the screen you want to raycast in.

var sideOfScreenRect : Rect; //a rect variable, say Rect(240,0,240,320). just keep in mind the size of the screen of the device your exporting this to.
var theTouchYouWant : Touch; //you don't need this unless you plan on keeping track of multiple touches. if you dont, just set this to 0 and it'll return the first touch on the screen.

if (sideOfScreenRect.Contains(Input.Touches[theTouchYouWant].position) )
{
     //put your point to ray function here
}
3

this is actually causing my whole unity to crash out lol

here is my exact code. did i implement what you send correctly? the compiler comes up with no errors, but my entire unity crashes when i add what you said to the script

// Prints the name of the object camera is directly looking at

var sideOfScreenRect = Rect(24,0,1000,768);
var theTouchYouWant : Touch = Input.GetTouch(0);
var spawner : Transform;
function Update () {
	
	if (sideOfScreenRect.Contains(Input.touches[theTouchYouWant].position) )
	{
	var touch : Touch = Input.GetTouch(0);
    // Get the ray
    var ray = camera.ScreenPointToRay( Vector3( touch.position.x, touch.position.y ) );
    // Do a raycast
    var hit : RaycastHit;
    if (Physics.Raycast (ray, hit))
	{        
	print ("I'm looking at " + hit.transform.name);
        spawner.position=hit.transform.position;
	}
	
	    else
	    {
        print ("I'm looking at nothing!");
	    }
}
}
4

fixxed the issue, unity crashed if you have the touch scripting within the contains, mousePosition worked fine

5

I think what may have been making your game crash is that theTouchYouWant should be an int. my bad. I wrote it wrong in the example code i gave you.
You should probably just try:
if (sideOfScreenRect.Contains(Input.GetTouch(0).position) )

you wont be able to keep track of multiple touches with this method, but it should work fine as long as the player only needs to touch one thing at a time.