Vector 3 in array

Questions & Answers
1

hi

i'm trying to use an array containing three Vector3's which refer to 3 respawning locations.

when the player dies (or in the code, has a transform.x >80) then new respawn position is randomly chosen from the array.

function Start () 
{
var array = new Array (Vector3(0, 5, 70), Vector3(-50, 5, -50), Vector3(60, 5, -20));
}

function Update () 
{
var randomposition = Random.Range (0, 2);                   // select random number
var newlocation: Vector3[] = array[randomposition];     //new Vector 3 from array

if(transform.position.x >80)                                        // player moves past arbitary point, new location 
    {
    transform.position = newlocation;
    }
}

however i get the error message

BCE0048: Type 'System.Type' does not support slicing.

i'm fairly new to Unity so apologies if i'm making a fundamental mistake here!

cheers duncan

2

I'm going to give you 2 codes, the first, since you are new to this will explain what you did wrong or could do better, and the second will be a functional version to help you out.

function Start () 
{
     var array = new Array (Vector3(0, 5, 70), Vector3(-50, 5, -50), Vector3(60, 5, -20));
     //You can make an array like this, but they are slower for several reasons.  
     //.Net arrays , like you did below, are a better choice.

     //And, you created this array locally, so when you access it in your
     //other methods, it does not exist.
}

function Update () 
{
     var randomposition : int = Random.Range (0, 2);     // select random number
     var newlocation: Vector3[] = array[randomposition]; //new Vector 3 from array
     // This is the line with the error.  You are creating a new Vector3[] but are assigning it the value of a Vector3.

     if(transform.position.x >80) // player moves past arbitary point, new location 
     //You should also not hardcode values.
     {
         transform.position = newlocation;
         //This is fine except you assigned it the wrong type above.    
     }
}

Here is the corrected code.

var spawnPoints : Vector3[]; //create an array of positions
var minDistForRand : float = 80;
//Add both these values in the inspector.

function Update () {
     var randomIndex : int = Random.Range(0, spawnPoints.Length);
     //Choose a random number based on the length of the array

     var newLocation : Vector3 = spawnPoints[randomIndex];
     //Choose a new point from the array of spawn points.

     if(transform.position.x > minDistForRand) {

           transform.position = newLocation;
     }
}