Little Problem with GUI

Unity Engine
1

Hey guys, i get a problem with this part of code (I know its this part because when i take it out it works fine)
The problem is that in this GUI, the button doesnt appear untill i hover over it or click on it, im following the tower defense tutorial from cgcookie and am on tutorial 3B (Here is the link):
http://cgcookie.com/unity/2012/08/27/unity-tower-defense-tutorial-part-03b-turret-placement/

Please help. Here is the code:

#pragma strict

//NGUI Items
var buildPanelOpen : boolean = false;
var buildPanelTweener : TweenPosition;
var buildPanelArrowTweener : TweenRotation;

// Placement Plane Items
var placementPlanesRoot : Transform;
var hoverMat : Material;
var placementLayerMask : LayerMask;
private var originalMat : Material;
private var lastHitObj : GameObject;

//Build Selection Items
var onColor : Color;
var offColor : Color;
var allStructures : GameObject[];
var buildBtnGraphics : UISlicedSprite[];
private var structureIndex : int = 0;

function Start()
{
	//Refresh the GUI
	structureIndex = 0;
	UpdateGUI();
}

function Update()
{
if(buildPanelOpen)
{
	var ray = Camera.main.ScreenPointToRay(Input.mousePosition);
	var hit : RaycastHit;
	if(Physics.Raycast(ray, hit, 1000, placementLayerMask))
	{
		if(lastHitObj)//if prev hit object
		{
			lastHitObj.renderer.material = originalMat; //Visually Deselect that object
		}
		
		lastHitObj = hit.collider.gameObject;
		originalMat = lastHitObj.renderer.material;
		lastHitObj.renderer.material = hoverMat;
	}
	else
	{
		if(lastHitObj)
		{
			lastHitObj.renderer.material = originalMat;
			lastHitObj = null;
		}
	}
	
	if(Input.GetMouseButtonDown(0) lastHitObj)
	{
		if(lastHitObj.tag == "PlacementPlane_Open")
		{
			var newStructure : GameObject = Instantiate(allStructures[structureIndex], lastHitObj.transform.position, Quaternion.identity);
			newStructure. transform.localEulerAngles.y = (Random.Range(0,360));
			lastHitObj.tag = "PlacementPlane_Taken";
		}
	}
}
}

function UpdateGUI()
{
	//Set the buttons to "off"
	for(var theBtnGraphic : UISlicedSprite in buildBtnGraphics)
	{
		theBtnGraphic.color = offColor;
	}
	
	//Set the selected build button to "on"
	buildBtnGraphics[structureIndex].color = onColor;
}

function SetBuildChoice(btnObj : GameObject)
{
	var btnName : String = btnObj.name;
	
	if(btnName == "Btn_Cannon")
	{
		structureIndex = 0;
	}
//	if(btnName == "Btn_Missile")
//	{
//		structureIndex = 0;
//	}
//	if(btnName == "Btn_Mine")
//	{
//		structureIndex = 0;
//	}
	
	UpdateGUI();
}

//When the build panel arrow is clicked
function ToggleBuildPanel()
{
	if(buildPanelOpen)
	{
		//hide the tiles
		for(var thePlane : Transform in placementPlanesRoot)
		{
			thePlane.gameObject.renderer.enabled = false;
		}
		
		//Bring the panel out
		buildPanelTweener.Play(false);
		//Rotate the arrow
		buildPanelArrowTweener.Play(false);
		//Mark panel as closed
		buildPanelOpen = false;
	}
	else //the build panel was close, so do this...
	{
		//show the tiles
		for(var thePlane : Transform in placementPlanesRoot)
		{
			thePlane.gameObject.renderer.enabled = true;
		}
		//Bring the panel in
		buildPanelTweener.Play(true);
		//Rotate the arrow
		buildPanelArrowTweener.Play(true);
		//Mark panel as open
		buildPanelOpen = true;
	}
}
2

BUMP, please? I just wanted to bump before i go to sleep

3

u need to link the original tutorial. Other than that it just looks like it turns off all the graphics then turns on the 1 that is active.

I believe that your problem is in the way your getting structureIndex, not this part.

4

Ok, edited the main post with the full script and the link to the tutorial.

5

UpdateGUI appears to be called in Start, and could be called in SetBuildChoice, but nothing calls SetBuildChoice.

6

UpdateGUI is called in Start and in SetBuildChoice, Nothing is calling SetBuildChoice but it is calling the index from it.

7

yes, but nothing ever calls SetBuildChoice, therefore the index is never being set.

There is actually some confusion in the script. you have a “layer” of tools, and you can click on them, then you have a gui layer of tools. very confusing.

8

Haha, it is confusing, but it is what he types out in the tutorial, But i dont know how to fix this problem :frowning:

9

How do i fix this? Or is everything there right or something?