Loading a level by clicking a quad

Questions & Answers
1

Hello! I’m making a main menu for a game, and I’m trying to load a level called, “Slender Woods” when the player clicks a quad. The quad is called, “Menu Button 1.” By the way, I’m very very new to Unity (this is my first game), and I’m only using Unity 5 Personal. This is the script I attached to the quad.

function MB1() {
  
    var hit : RaycastHit;
    var ray : Ray = Camera.main.ScreenPointToRay(Input.mousePosition);
  
  
    if(Input.GetMouseButtonDown) {
        if(Physics.Raycast(ray, hit, 100)){ 
            if (hit.transform.tag == "Menu Button 1") {
                Application.LoadLevel("Slender Woods");
            }
  
        }
  
    }
}

When I test the game, everything pops up (no errors), but nothing happens when I click the button. Please help, and sorry if this is a very noob-ish problem.

2

I think that you need to place input and raycast inside update function and place this script on the camera not on the obect.

Something like:

function Update(){
if(Input.GetMouseButtonDown) {
    var hit : RaycastHit;
    var ray : Ray = Camera.main.ScreenPointToRay(Input.mousePosition);
         if(Physics.Raycast(ray, hit, 100)){ 
             if (hit.transform.tag == "Menu Button 1") {
                 Application.LoadLevel("Slender Woods");
             }
         }
     }
}

Another usefull thing would be to use a switch case to identify objects that are clicked:

function Update(){
    if(Input.GetMouseButtonDown) {
          var hit : RaycastHit;
          var ray : Ray = Camera.main.ScreenPointToRay(Input.mousePosition);
             if(Physics.Raycast(ray, hit, 100)){ 
	                switch(hit.collider.name){
			case "Menu Button 1":
					Application.LoadLevel("Slender Woods");
				break;

            case "Menu Button 2":
					Application.LoadLevel("Slender Woods2");
				break;


                        //and so on

             }
         }
    }
}

Hope this helps.

3

That can be solved very easily using OnMouseDown.

Just add the script to your object that has a collider.

Next, just edit levelname in inspector.

// Remember to edit Level Name in the Inspector
// after you have placed the script on the Collider.
var levelName : String = "untitled";
    
// OnMouseDown will be called by Unity. 
// No other code is required.
function OnMouseDown()
{
    Application.LoadLevel(levelName);
}

Unity takes care of raycasting etc for you.