cocos2d for iPhone

A fast, easy to use, free, and community supported 2D game engine

1. 

   hm50
   Member

   Hey all, I have two classes, GameLayer and EnemyLayer. I am using Chipmunk and @mobilebros SpaceManager. I have a simple version of my app functioning well and responding correctly to physics when my hero and one enemy are added within GameLayer. I want to add multiple enemies and have reference to all of them separately each with it's own cpShape, so I created the enemy class to build my enemies as needed. The problem I ran into was getting a reference to the GameLayer's SpaceManger object so that each new enemy responded correctly. Can anyone advise how I can get that reference to SpaceManager from within my EnemyLayer? I would like to call something like: [EnemyLayer addNewEnemyAtPoint:position1 secondNodePoint:position2 enemyType:1] ;

   Should I also be passing a reference to GameLayer's SpaceManager object in that call? Or how should I approach it?

   Posted 1 year ago #
2. 

   mrTortex
   Member

   Exactly what I'm trying to figure out now. :) No doubt MobileBros will turn up to help.

   Is your enemy class a single shape Chipmunk object, or multi shape? I'm trying to subclass my player and enemies also, they are all multi-part objects, and I can't figure out how to make a class which I can add to Spacemanager.

   Posted 1 year ago #
3. 

   hm50
   Member

   For now, until I understand what's going on better, I am using a single shape, but it is connected to another using a springJoint. So until I figure out how to implement my enemy class properly, I am working on the correct way to remove a single instance of my shape and it's associated joint.

   Posted 1 year ago #
4. 

   hm50
   Member

   I have found a nice tutorial that I am hoping will guide me along http://morethanmachine.com/macdev/?tag=cocos2d

   Posted 1 year ago #
5. 

   mobilebros
   Moderator

   @hm50 - If I understand what you're saying here correctly, then yes you probably need to pass the SpaceManager instance along, or have it accessed from somewhere else... I purposely did not make it a Singleton, so that you could have multiple spaces.... but no one's saying you couldn't do that.

   Posted 1 year ago #
6. 

   hm50
   Member

   @mobilebros - Thank you for your time and assistance! I have a singleton class and thought about putting it there also, but I am thinking that I just may need an additional space.

   As for the removing of shapes, I was getting hung up on whether to use [self removeChild:node] or [smgr removeAndFreeShape:node];

   If I used the later, I always got an error telling me that the body had never been added, so I am using the first.

   I'm still very green with SpaceManager/Chipmunk so if that's not correct, I am more than interested in learning how to properly do it.

   Thanks,
   Harv

   Posted 1 year ago #
7. 

   mrTortex
   Member

   @mobilebos: Sorry to be ignorant, but how would you do this " then yes you probably need to pass the SpaceManager instance along" ?

   Posted 1 year ago #
8. 

   hm50
   Member

   Pass along a pointer I believe. (SpaceManager *)smgr

   Posted 1 year ago #
9. 

   mrTortex
   Member

   Sorry to be ignorant again, but where does that go?

   This is driving me nuts. I'm going around in circles. My class runs fine, the ball adds and drops, but I have to add the ball in my main class to my SpaceManager space. I really need to be able to do this externally. Time for a walk otherwise I'll need to buy a new keyboard ;)

   Posted 1 year ago #
10. 

    mobilebros
    Moderator

    @mrTortex - I just meant pass it as a parameter to a function/init, if you need it in the function/class

    -(id) initWithStuff:(int)flag spaceManager:(SpaceManager*)smgr
    {
         //do stuff
    }
    
    ///call it like:
    
    [[someclass alloc] initWithStuff:4 spaceManager:smgr];

    Know what I mean?

    @hm50 - Yeah the newer chipmunk will now complain if you try to remove a body that was never added instead of doing nothing.... this is arguably a SpaceManager bug, I should just be checking before I try to remove it.

    Posted 1 year ago #
11. 

    mrTortex
    Member

    Ahh damn it :) Yeah, that makes sense. I'll try it after I get back from my walk.

    Thanks for the help. Truly, if anyone wants and 3D stuff doing, just shout. Really.

    Posted 1 year ago #
12. 

    mobilebros
    Moderator

    @hm50 - Actually I'm glad you brought this whole body issue up, I've made it check now before trying to remove it BUT it also made me realize the potential for another bug, SpaceManager tries to remove and free a body even if it may be shared by other shapes.... this is bad, so now it checks to see if any other shape is using it... this will be for 0.0.6

    Posted 1 year ago #

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