adding CCPhysicsSprite to CCLayer cocos2d - objective-c

Question

I'm trying to reorganize HelloWorld project in cocos2d to our needs.
The thing I did - made a class, which is inherent from CCPhysicsSprite and wanted to add it to CCLayer (HelloWorldLayer). But something goes wrong. According to debugger my instance is created, but I can't see it in the iOS emulator. Need your help and explanations.
HelloWorldLayer.h
#interface HelloWorldLayer : CCLayer <GKAchievementViewControllerDelegate, GKLeaderboardViewControllerDelegate>
{
CCTexture2D *spriteTexture_; // weak ref
b2World* world_; // strong ref
GLESDebugDraw *m_debugDraw; // strong ref
}
HelloWorldLayer.mm (only changed by me functions:)
-(id) init
{
if( (self=[super init])) {
// enable events
self.touchEnabled = YES;
self.accelerometerEnabled = YES;
CGSize s = [CCDirector sharedDirector].winSize;
// init physics
[self initPhysics];
// create reset button
//[self createMenu];
//Set up sprite
//#if 1
// // Use batch node. Faster
// CCSpriteBatchNode *parent = [CCSpriteBatchNode batchNodeWithFile:#"blocks.png" capacity:100];
// spriteTexture_ = [parent texture];
//#else
// // doesn't use batch node. Slower
// spriteTexture_ = [[CCTextureCache sharedTextureCache] addImage:#"blocks.png"];
// CCNode *parent = [CCNode node];
//#endif
// [self addChild:parent z:0 tag:kTagParentNode];
//
//
// [self addNewSpriteAtPosition:ccp(s.width/2, s.height/2)];
CCLabelTTF *label = [CCLabelTTF labelWithString:#"Tap screen" fontName:#"Marker Felt" fontSize:32];
[self addChild:label z:0];
[label setColor:ccc3(0,0,255)];
label.position = ccp( s.width/2, s.height-50);
[self scheduleUpdate];
}
return self;
}
-(void) addNewSpriteAtPosition:(CGPoint)p
{
CCLOG(#"Add sprite %0.2f x %02.f",p.x,p.y);
if([self getChildByTag:kTagParentNode] == nil)
{
BloodRobotUnit *unit = [[BloodRobotUnit alloc] initWithOwner:world_ at:p];
[self addChild:unit z:0 tag:kTagParentNode];
}
}
And Creating unit: (header and mm file:)
#interface BloodRobotUnit : CCPhysicsSprite
{
b2Body *body_;
b2World *owner_;
}
-(id) initWithOwner:(b2World*)owner at:(CGPoint)pt;
mm:
-(id) initWithOwner:(b2World*)owner at:(CGPoint)pt
{
if(self = [super initWithFile:#"blocks.png" rect:CGRectMake(0, 0, 32, 32)])
{
owner_ = owner;
//create body at position
b2BodyDef bodyDef;
bodyDef.type = b2_dynamicBody;
bodyDef.position.Set(pt.x/PTM_RATIO, pt.y/PTM_RATIO);
body_ = owner->CreateBody(&bodyDef);
// Define another box shape for our dynamic body.
b2PolygonShape dynamicBox;
dynamicBox.SetAsBox(.5f, .5f);//These are mid points for our 1m box
// Define the dynamic body fixture.
b2FixtureDef fixtureDef;
fixtureDef.shape = &dynamicBox;
fixtureDef.density = 1.0f;
fixtureDef.friction = 0.3f;
body_->CreateFixture(&fixtureDef);
[self setB2Body: body_];
[self setPosition:pt];
return (self);
}
return nil;
}
Where is my mistake? Any help will be very appreciated

Answer 1

The trick was in setting position to self
Debugger showed that my texture was at position inf:inf
Code change to make everything work is the following:
in mm file of creating a CCPhysicsSprite iheriter do the following:
[self setB2Body: body_];
self.PTMRatio = PTM_RATIO;
//[self setPosition:CGPointMake(pt.x/PTM_RATIO, pt.y/PTM_RATIO)];
That is - you need to set only body position and set PTMRatio (thanx to #giorashc). Setting sprite texture is not necessary.