gistfile1.m

- (void)accelerometer:(UIAccelerometer *)accelerometer didAccelerate:(UIAcceleration *)acceleration {
        
    /* Basic setup to translate the tile to gravity */
    b2Vec2 gravity(-acceleration.y * 15, acceleration.x *15);
    _world->SetGravity(gravity);
    
    
    /* First lets figure out the angle to which the iPad is tilted*/
    float angle = atan2(acceleration.x, -acceleration.y);
    
    /* If tilted left then flick the eagle to tilt left */
    if (-angle < 1.2 && !flickLeft) {
        
        /* We dont want to do this everytime, only once per tilt.*/
        flickLeft = YES;
        
        /* FLICK THAT EAGLE */
        eagleBody->ApplyAngularImpulse(-1500);
        NSLog(@"LEFT TURN");
        
        /* We dont want to level out yet. */
        levelOut = NO;
        
    /* If tilted right then flick the eagle to tilt right */
    }else if (-angle > 1.8 && !flickRight) {
        
        /* We dont want to do this everytime, only once per tilt.*/
        flickRight = YES;
        
        /* We dont want to level out yet. */
        levelOut = NO;
        
        /* FLICK THAT EAGLE */
        eagleBody->ApplyAngularImpulse(1500);
        NSLog(@"RIGHT TURN");

    /* Did the user level out */
    }else if (-angle < 1.6 && -angle > 1.5) {
        
        /* These are some flags we will use later in the tick: method */
        levelOut = YES;
        if (flickLeft) {
            bankedLeft=YES;
        }else if (flickRight){
            bankedRight = YES;
        }
        flickRight = NO;
        flickLeft = NO;
    }
    NSLog(@"Eagle angle %f iPad angle %f", eagleBody->GetAngle(), angle);
    
}