implementing a score/lives system

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implementing a score/lives system

(5 posts) (3 voices)

Started 9 months ago by IdonZaki
Latest reply from IdonZaki

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singleton

IdonZaki
Member

I am trying to implement a live/score system using cocos2d and box2d. my bodies are box2d bodies which collide as I want them to but the problem is that I have been trying to implement a score system where on each collision a life is removed or reduced from the lives left and after a certain number of collisions(say 3) the game is supposed to stop. On this occasion it doesn't but from the CCLOG I find out that it actually prints out the message I put in to display when the game manager is called but a weird thing is that it calls it forever(see the debugging window below)also it removes the object, "man" from the scene completely on starting the application.

I have a gameManager(singleton) class where in the .h file I have this declared

@interface GameManager : NSObject {

int lives;

}
-(void)removeLives : (int)val;

and in the gameManager.m file I have this method

-(void)removeLives : (int)val
{

lives -=val;
CCLOG(@"YOU HAVE LOST A LIFE MAN");

}

In my main gameLayer.mm file in the update method I have this code

if(kStateColliding){

if (lives > 0) {

man.visible = TRUE;
}
else if(lives <= 0){

[man stopAllActions];

man.visible = FALSE;

[[GameManager sharedGameManager] removeLives:1];

}
}
and the lives is initialised in gameManager init method thus

-(id)init { // 8
self = [super init];
if (self != nil) {
// Game Manager initialized
CCLOG(@"Game Manager Singleton, init");

lives = 3;
}

Also note that I have a "Man" class which is Box2d class.

Am I doing the correct thing? Please can anyone help me out with how to go about implementing this system and where and how to make the appropriate calls.

Thanks.

Posted 9 months ago #
cocojoe
Member

Please put your code in a 'code' block, hard to read.

Posted 9 months ago #
ScottW
Member
Correct me if I am wrong, your code is hard to read without the 'code', but it looks like you are calling

[[GameManager sharedGameManager] removeLives:1];

in the

else if(lives <= 0){

statement. This will then only remove a life if lives is already 0 or under.

You probs don't need a whole new file for the system though, you could just have:
```
if(kStateColliding) {
     if(--lives <= 0) {
          //GAMEOVER
     } else {
          //Life lost, but more lives remain.
     }
}
```
Posted 9 months ago #
IdonZaki
Member

@cocojoe: thanks for the correction, I actually just started using this forum and this is my first post so please bear with me.

@ScottW: Thanks a million for your fast reply. I just saw that error too with the gamemanager...thanks for pointing that out and I will implement your suggestions. Cheers!

Posted 9 months ago #
IdonZaki
Member
OK guys I have put the codes in the code blocks...I still need help please.

I am trying to implement a live/score system using cocos2d and box2d. my bodies are box2d bodies which collide as I want them to but the problem is that I have been trying to implement a score system where on each collision a life is removed or reduced from the lives left and after a certain number of collisions(say 3) the game is supposed to stop. On this occasion it doesn't but from the CCLOG I find out that it actually prints out the message I put in to display when the game manager is called but a weird thing is that it calls it forever(see the debugging window below)also it removes the object, "man" from the scene completely on starting the application.

I have a gameManager(singleton) class where in the .h file I have this declared
```
@interface GameManager : NSObject {

int lives;

}
-(void)removeLives : (int)val;
```
and in the gameManager.m file I have this method
```
-(void)removeLives : (int)val
{

lives -=val;
CCLOG(@"YOU HAVE LOST A LIFE MAN");

}
```
In my main gameLayer.mm file in the update method I have this code
```
if(kStateColliding){

if (lives > 0) {

man.visible = TRUE;
[[GameManager sharedGameManager] removeLives:1];

}
else if(lives <= 0){

[man stopAllActions];

man.visible = FALSE;

}
}
```
and the lives is initialised in gameManager init method thus
```
-(id)init { // 8
self = [super init];
if (self != nil) {
// Game Manager initialized
CCLOG(@"Game Manager Singleton, init");

lives = 3;
}
```
Also note that I have a "Man" class which is Box2d class.

Am I doing the correct thing? Please can anyone help me out with how to go about implementing this system and where and how to make the appropriate calls.

Thanks.
Posted 9 months ago #

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