gistfile1.m

#import "CCPageBox2dBase.h"

@implementation CCPageBox2dBase
@synthesize levelHelperName = _levelHelperName;
- (void)setupWorld {    
    b2Vec2 gravity = b2Vec2(0.0f, 0.0f);
    bool doSleep = false; 
    _world = new b2World(b2Vec2(0,0), doSleep);
    _world->SetContinuousPhysics(true);
    
    
    
}

- (void)setupLevelHelper {
    _lhelper = [[LevelHelperLoader alloc] initWithContentOfFile:_levelHelperName];
    [_lhelper addObjectsToWorld:_world cocos2dLayer:self];
    [_lhelper createWorldBoundaries:_world];
    [_lhelper createGravity:_world];
}

- (void)setupDebugDraw {    
    m_debugDraw = new GLESDebugDraw([_lhelper pixelsToMeterRatio] *
                                    [[CCDirector sharedDirector] contentScaleFactor]);
    _world->SetDebugDraw(m_debugDraw);
    m_debugDraw->SetFlags(b2DebugDraw::e_shapeBit | 
                          b2DebugDraw::e_jointBit);
}

- (void)setupAudio {
    
}

- (void)accelerometer:(UIAccelerometer *)accelerometer didAccelerate:(UIAcceleration *)acceleration {
    
    b2Vec2 gravity(-acceleration.y * 15, acceleration.x *15);
    _world->SetGravity(gravity);
    
}


- (void)updateLevelHelper:(ccTime)dt {
    [_lhelper update:dt];
}

- (void)updateBox2D:(ccTime)dt {
    _world->Step(dt, 1, 1);
    _world->ClearForces();
}

- (void)updateSprites:(ccTime)dt {
    
    for (b2Body* b = _world->GetBodyList(); b; b = b->GetNext())
	{
		if (b->GetUserData() != NULL) {
			CCSprite *myActor = (CCSprite*)b->GetUserData();
            
			myActor.position = CGPointMake(b->GetPosition().x * [_lhelper pixelsToMeterRatio], 
                                           b->GetPosition().y * [_lhelper pixelsToMeterRatio]);
			myActor.rotation = -1 * CC_RADIANS_TO_DEGREES(b->GetAngle());
        }
    }
}

- (void)update:(ccTime)dt {
    [self updateLevelHelper:dt];
    [self updateBox2D:dt];
    [self updateSprites:dt];
}


- (id)initWithLevelHelper:(NSString *)lhName
{
	if ((self = [super init]) ) {
        self.isTouchEnabled = YES;
        self.isAccelerometerEnabled = YES;
        [self setupWorld];
        [self setupAudio];
        [self scheduleUpdate];
        
        _levelHelperName = lhName;
        [self setupLevelHelper];   
	}
	
	return self;
}
- (id)init {
    if ((self = [super init])) {
        
        
        
    }
    return self;
}

// on "dealloc" you need to release all your retained objects
- (void) dealloc
{
    CCLOG(@"dealloc: %@", self);

    _levelHelperName = nil;
    [_lhelper release];
    _lhelper = nil;
	[super dealloc];
}
@end