All the gameplay entities in this game share a few things in common. They all need an axis aligned bounding box for collision detection, they all also possess some speed, and they also possess a type attribute. Thus, their parent class GameObject is defined as follows in GameObject.h:
class GameObject : public CCSprite
{
public:
GameObject() : game_world_(NULL),
type_(E_GAME_OBJECT_NONE),
aabb_(CCRectZero),
#ifdef ICEMAN_DEBUG_MODE
aabb_node_(NULL),
#endif
speed_(CCPointZero) {}
virtual ~GameObject()
{}
virtual void SetAABB(CCRect aabb)
{
aabb_ = aabb;
#ifdef ICEMAN_DEBUG_MODE
// draw the AABB in debug mode only
CCPoint vertices[4];
vertices[0] = CCPointZero;
vertices[1] = ccp(0, aabb_.size.height);
vertices[2] = ccp(aabb_.size.width, aabb_.size.height);
vertices[3] = ccp(aabb_.size.width, 0);
aabb_node_ = CCDrawNode::create();
aabb_node_->drawPolygon(vertices, 4, ccc4f(0, 0, 0, 0), 1, ccc4f(1...