GridMove modification causing Unity to freeze

Unity Engine
1

Hello, I took the GridMove script (http://www.unifycommunity.com/wiki/index.php?title=GridMove) and am trying to modify it to move according to mouse position. Here is my current script:

rivate var mouseButton1DownPoint : Vector2;
private var mouseButton1DownTerrainHitPoint : Vector2;
private var raycastLength : float = 200.0;

private var selectedUnit : GameObject;

var walkSpeed : float = 1.0;
var runSpeed : float = 2.0;
var gridSize : int = 1;
enum Orientation {Horizontal, Vertical}
var gridOrientation = Orientation.Horizontal;
var allowDiagonals = true;
var correctDiagonalSpeed = true;
private var input = Vector2.zero;

function Update () {	
	if (Input.GetKeyDown(KeyCode.Mouse0)) {
		mouseButton1DownPoint = Input.mousePosition;
		
		var hit : RaycastHit;
		var ray = Camera.main.ScreenPointToRay (mouseButton1DownPoint);
		
		if (Physics.Raycast (ray, hit, raycastLength))
		{
			if (hit.collider.name == "Terrain")
			{
				mouseButton1DownTerrainHitPoint = hit.point;
				MoveSelectedUnitToPoint(mouseButton1DownTerrainHitPoint);
			}
		}
	}
}

function MoveSelectedUnitToPoint(destinationPoint : Vector2) {
	selectedUnit = gameObject.Find("Capsule");
	selectedUnit.SendMessage("MoveToPoint", destinationPoint);
}

function MoveToPoint(destinationPoint : Vector2) {
        while (input == Vector2.zero) {
            GetAxes(destinationPoint);
            tx = 0.0;
            yield;
        }
       
        startPosition = transform.position;
        endPosition = gridOrientation == Orientation.Horizontal?
            Vector3(Mathf.Round(transform.position.x), 0.0, Mathf.Round(transform.position.z)) +
            Vector3(System.Math.Sign(input.x)*gridSize, 0.0, System.Math.Sign(input.y)*gridSize)
            :
            Vector3(Mathf.Round(transform.position.x), Mathf.Round(transform.position.y), 0.0) +
            Vector3(System.Math.Sign(input.x)*gridSize, System.Math.Sign(input.y)*gridSize, 0.0);
        t = tx;
        while (t < 1.0) {
            moveSpeed = Input.GetButton("Run")? runSpeed : walkSpeed;
            t += Time.deltaTime * (moveSpeed/gridSize) * (correctDiagonalSpeed  input.x != 0.0  input.y != 0.0? .7071 : 1.0);
            transform.position = Vector3.Lerp(startPosition, endPosition, t);
            yield;
        }
        tx = t - 1.0;   // Used to prevent slight visual hiccups on "grid lines" due to Time.deltaTime variance
        GetAxes(destinationPoint);
    }

function GetAxes(destinationPoint : Vector2) {
	input = Vector2(Input.GetAxis("Horizontal"), Input.GetAxis("Vertical"));
	
	if (destinationPoint.x > transform.position.x)
	{
		while (transform.position.x < destinationPoint.x)
		{
		input.x = 1;
		}
	}
}

the point of emphasis here is GetAxes function

Everytime I click an x position greater than transform position, unity freezes and I must use task manager to close it.

Any help is appreciated. Thank you!

2 
		while (transform.position.x < destinationPoint.x)
		{
		input.x = 1;
		}

This is an infinite loop…transform.position.x will always be less than destinationPoint.x, since there’s nothing inside the loop that will change the condition.

–Eric

3

Hey, thanks for the reply, I’ll see what I can do

4

I get a OverflowException: Number overflow. when I try this:

function GetAxes(destinationPoint : Vector2) {
	input = Vector2(Input.GetAxis("Horizontal"), Input.GetAxis("Vertical"));
	
	if (destinationPoint.x > transform.position.x)
	{
		var i : int = 1;
		var travelDistance : int = destinationPoint.x - transform.position.x;
		for (i=1; i>=travelDistance; i++)
		{
			input.x = 1;
		}
	}
}

I am just beginning to use Unity and I’m sorry for any overlooked logic problems ;/

Thanks