Level unlock system

MaxUylings · October 1, 2012, 10:00am

Hey guys,

I am working on a level unlocking system for my iOS game. At this moment I got it working but I was wondering what you guys thought about my approach. I am asking you for feedback because I am fairly new to unity and programming in general and would very much like to improve my skills.
This is the code I have used. There is more in these scripts but to make it easier to read I have deleted some of the code that is not relevant to my question.

I have put this code on my first scene

#pragma strict

var numberOfLevels : int;

private var levels : int[];


function Start () {

levels = new int [numberOfLevels];
	for(var i :int = 1; i<levels.Length;i++){
		if (PlayerPrefs.GetInt("Level"+(i+1)) == null){
 			PlayerPrefs.SetInt("Level"+(i+1),0);
		}
	}

}

I have put the following code on a trigger at the end of all my levels:

#pragma strict
var numberOfLevels : int;


function Start () {
}

function Update () {
}

function OnTriggerEnter(collision : Collider){
NextLevel();
}

function NextLevel(){
UnlockLevel();
}

function UnlockLevel(){
for (var i : int = 1; i < numberOfLevels; i++){
	if(Application.loadedLevelName == "Level"+i){
	PlayerPrefs.SetInt("Level"+(i+1),1);
	}
}
}

And have put the following script on my levelselect menu:

#pragma strict
var numberOfLevelsWorld01 : int;


function Start () {
	for(var i : int = 1; i<numberOfLevelsWorld01; i++){
		if(PlayerPrefs.GetInt("Level"+(i+1))==1){
			GameObject.Find("Level"+(i+1)).GetComponent(BoxCollider).enabled= true;
			GameObject.Find("ButtonLocked"+(i+1)).active = false;
		}

	}
}

Thank in advance!
Kind regards,
Max Uijlings

DexRobinson · October 1, 2012, 4:23pm

Looks good to me. I like how you locked your level buttons. Might have to keep this in mind when I do something with levels.

MaxUylings · October 1, 2012, 5:23pm

Thanks good to hear I’m on the right track.

jerotas · October 2, 2012, 6:40am

I did something real similar with my game. Looks good, and this will work well. Good thinking

And then you may want to darken the unavailable levels so they look different or something.

MaxUylings · October 2, 2012, 8:36am

Thanks for your feedback. At this moment I have a different texture representing the button being disabled. Would you say I should darken that out as well?

jerotas · October 2, 2012, 4:31pm

I would, but do what you think looks best

MaxUylings · October 2, 2012, 8:35pm

oke thanks. I will experiment a little with it. I’ll let you know what I ended up with

Kind Regards,
Max

renman3000 · October 2, 2012, 10:49pm

I use a stageIndex and levelIndex of type int for each level and its managers.

PlayerPrefs.SetInt("levelUnlocked" + stageIndex.ToString() + levelIndex.ToString());

LevelUnlocked = PlayerPrefs.GetInt("levelUnlocked" + stageIndex.ToString() + levelIndex.ToString());

MaxUylings · October 3, 2012, 9:12pm

@renman3000 Thank you very much for this solution. It definitely made my code a lot cleaner.

Kind Regards,
Max

Jtbentley_v2 · October 4, 2012, 12:30am

I personally would have used PlayerPrefs.HasKey(“levelname”), because it returns a boolean… Also, you’ve got an empty update loop in there that should be removed

renman3000 · October 4, 2012, 2:31am

As pointed out by a fellow board member tho, I am going to modify it to be more like this, to prevent situation where stage 1 level index 11 don’t get confusd with stage index 11 level 1.

PlayerPrefs.SetInt("levelUnlocked" + stageIndex.ToString() + ":" + levelIndex.ToString());

MaxUylings · October 4, 2012, 9:51am

renman3000:

As pointed out by a fellow board member tho, I am going to modify it to be more like this, to prevent situation where stage 1 level index 11 don’t get confusd with stage index 11 level 1.
PlayerPrefs.SetInt("levelUnlocked" + stageIndex.ToString() + ":" + levelIndex.ToString());

hahahaha yeah good point I’ll change that right away.

MaxUylings · October 4, 2012, 6:14pm

Thanks for the advise. And indeed you are correct about the update function. I accidentally missed it. But off course I know that I should not have empty update functions in my code.

MaxUylings · October 4, 2012, 6:32pm

Oke guys so I changed the scripts to how I think it is good. I implemented your suggestions and ended up with the following.

In my first script at the beginning of the game I put the following code:

#pragma strict

static var worlds : int = 2;
static var levels : int = 18;

private var worldIndex : int;
private var levelIndex : int;


function Start () {
PlayerPrefs.DeleteAll();
LockLevels();
}


function LockLevels(){

	for (var i : int = 0; i < worlds; i++){
		for (var j : int = 1; j < levels; j++){
			worldIndex  = (i+1);
			levelIndex  = (j+1);
			if(!PlayerPrefs.HasKey("level"+worldIndex.ToString() +":" +levelIndex.ToString())){
				PlayerPrefs.SetInt("level"+worldIndex.ToString() +":" +levelIndex.ToString(),0);
			}
		
		}
	}

}

In the second script in my levelSelectMenu I have the following code:

#pragma strict


private var worldIndex : int;
private var levelIndex : int;

function Start () {
	for(var i : int = 1; i<=TempLevelSystem.worlds; i++){
		if(Application.loadedLevelName == "World"+i){
			worldIndex = i;
			CheckLockedLevels();

		}

	}

}

function CheckLockedLevels(){
	for(var j : int = 1; j<TempLevelSystem.levels; j++){
		levelIndex = (j+1);
		Debug.Log(""+worldIndex +levelIndex);
		if((PlayerPrefs.GetInt("level"+worldIndex.ToString() +":" +levelIndex.ToString()))==1){
			GameObject.Find("Level"+worldIndex.ToString() +"." +levelIndex.ToString()).GetComponent(BoxCollider).enabled= true;
			GameObject.Find("ButtonLocked"+(j+1)).active = false;
		}
	}
}

And the last script that will unlock the next level I put this code in:

#pragma strict
var level : String;
private var worldIndex : int;
private var levelIndex : int;
private var currentLevel : String;



function Start () {
currentLevel = Application.loadedLevelName;
}

function OnTriggerEnter(collision : Collider){
	NextLevel();
}

function NextLevel(){
	UnlockLevel();
	Application.LoadLevel(""+level);
}

function UnlockLevel(){
	for(var i : int = 0; i<TempLevelSystem.worlds; i++){
		for(var j : int = 1; j<TempLevelSystem.levels; j++){				
			if(currentLevel == "Level"+(i+1).ToString() +"." +j.ToString()){
				worldIndex  = (i+1);
				levelIndex  = (j+1);
				PlayerPrefs.SetInt("level"+worldIndex.ToString() +":" +levelIndex.ToString(),1);
			}
		}
	}
}

Again I have removed the code that is not relevant to this thread.

I hope you guys think I did a better job this time and that I have implemented your advice like you intended.
Your help has been very much appreciated.

Kind Regards,
Max Uijlings

Sillan · February 12, 2013, 6:45pm

I just discovered this-

First, you need to place this on an empty game object in your scene. It will provide 8 levels.
You also will need locked and unlocked icons going from 1-8.
Put this on the GameObject :

#pragma strict

var level1_locked:GameObject;
var level1_unlocked:GameObject;
var level2_locked:GameObject;
var level2_unlocked:GameObject;
var level3_locked:GameObject;
var level3_unlocked:GameObject;
var level4_locked:GameObject;
var level4_unlocked:GameObject;
var level5_locked:GameObject;
var level5_unlocked:GameObject;
var level6_locked:GameObject;
var level6_unlocked:GameObject;
var level7_locked:GameObject;
var level7_unlocked:GameObject;
var level8_locked:GameObject;
var level8_unlocked:GameObject;

var YouWin:String;

var levelReached1 : int = 0;

levelReached1 = PlayerPrefs.GetInt(“SavedLevel1”);

function Update(){

if(levelReached1 == 0)

{
level1_locked.active = false;
level1_unlocked.active = true;

level2_locked.active = true;
level2_unlocked.active = false;

level3_locked.active = true;
level3_unlocked.active = false;

level4_locked.active = true;
level4_unlocked.active = false;

level5_locked.active = true;
level5_unlocked.active = false;

level6_locked.active = true;
level6_unlocked.active = false;

level7_locked.active = true;
level7_unlocked.active = false;

level8_locked.active = true;
level8_unlocked.active = false;

}
if(levelReached1 == 1)
{
level1_locked.active = false;
level1_unlocked.active = true;

level2_locked.active = false;
level2_unlocked.active = true;

level3_locked.active = true;
level3_unlocked.active = false;

level4_locked.active = true;
level4_unlocked.active = false;

level5_locked.active = true;
level5_unlocked.active = false;

level6_locked.active = true;
level6_unlocked.active = false;

level7_locked.active = true;
level7_unlocked.active = false;

level8_locked.active = true;
level8_unlocked.active = false;

}
if(levelReached1 == 2)
{
level1_locked.active = false;
level1_unlocked.active = true;

level2_locked.active = false;
level2_unlocked.active = true;

level3_locked.active = false;
level3_unlocked.active = true;

level4_locked.active = true;
level4_unlocked.active = false;

level5_locked.active = true;
level5_unlocked.active = false;

level6_locked.active = true;
level6_unlocked.active = false;

level7_locked.active = true;
level7_unlocked.active = false;

level8_locked.active = true;
level8_unlocked.active = false;

}
if(levelReached1 == 3)
{
level1_locked.active = false;
level1_unlocked.active = true;

level2_locked.active = false;
level2_unlocked.active = true;

level3_locked.active = false;
level3_unlocked.active = true;

level4_locked.active = false;
level4_unlocked.active = true;

level5_locked.active = true;
level5_unlocked.active = false;

level6_locked.active = true;
level6_unlocked.active = false;

level7_locked.active = true;
level7_unlocked.active = false;

level8_locked.active = true;
level8_unlocked.active = false;

}
if(levelReached1 == 4)
{
level1_locked.active = false;
level1_unlocked.active = true;

level2_locked.active = false;
level2_unlocked.active = true;

level3_locked.active = false;
level3_unlocked.active = true;

level4_locked.active = false;
level4_unlocked.active = true;

level5_locked.active = false;
level5_unlocked.active = true;

level6_locked.active = true;
level6_unlocked.active = false;

level7_locked.active = true;
level7_unlocked.active = false;

level8_locked.active = true;
level8_unlocked.active = false;
}
if(levelReached1 == 5)
{
level1_locked.active = false;
level1_unlocked.active = true;

level2_locked.active = false;
level2_unlocked.active = true;

level3_locked.active = false;
level3_unlocked.active = true;

level4_locked.active = false;
level4_unlocked.active = true;

level5_locked.active = false;
level5_unlocked.active = true;

level6_locked.active = false;
level6_unlocked.active = true;

level7_locked.active = true;
level7_unlocked.active = false;

level8_locked.active = true;
level8_unlocked.active = false;
}
if(levelReached1 == 6)
{
level1_locked.active = false;
level1_unlocked.active = true;

level2_locked.active = false;
level2_unlocked.active = true;

level3_locked.active = false;
level3_unlocked.active = true;

level4_locked.active = false;
level4_unlocked.active = true;

level5_locked.active = false;
level5_unlocked.active = true;

level6_locked.active = false;
level6_unlocked.active = true;

level7_locked.active = false;
level7_unlocked.active = true;

level8_locked.active = true;
level8_unlocked.active = false;
}
if(levelReached1 == 7)
{
level1_locked.active = false;
level1_unlocked.active = true;

level2_locked.active = false;
level2_unlocked.active = true;

level3_locked.active = false;
level3_unlocked.active = true;

level4_locked.active = false;
level4_unlocked.active = true;

level5_locked.active = false;
level5_unlocked.active = true;

level6_locked.active = false;
level6_unlocked.active = true;

level7_locked.active = false;
level7_unlocked.active = true;

level8_locked.active = false;
level8_unlocked.active = true;
}
if(levelReached1 == 8)
{
Application.LoadLevel(YouWin);
}

}

Last of all you need to place this bit of code where you want to unlock a level.

PlayerPrefs.SetInt(“SavedLevel1”, 1);
Debug.Log(“SavedLeve1 = 1”);
yield WaitForSeconds(2.0);
//maybe have Application.LoadLevel(“Whatever level you want to load”);

do this with each level but change the places where it has the number 1 to 2 when you want to unlock level 2 and the same for 3-8.

I hope this helped.
Johnny ;D

andymads · February 12, 2013, 7:47pm

I would recommend using arrays rather than numbers variables.

ptdnet · February 14, 2013, 11:51pm

Good lord yes… how does that solution work with 255 levels?

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