Gist for CATransform3D for iCarousel to give a "deck of cards" style transformation

CATransform3D

- (CATransform3D)carousel:(iCarousel *)carousel itemTransformForOffset:(CGFloat)offset baseTransform:(CATransform3D)transform
{
    if (offset > 0)
    {
        //move back
        transform = CATransform3DTranslate(transform, 0, 0, -50 * offset);
    }
    else
    {
        //flip around
        transform = CATransform3DTranslate(transform, 250 * sin(MIN(1, -offset) * M_PI), 0, 100 * offset);
    }
    return transform;
}