bool initWithFile(const char *filePath)
	{
		cocos2d::LWFResourceCache *cache =
			cocos2d::LWFResourceCache::sharedLWFResourceCache();
		cocos2d::ValueMap dict = cache->loadParticle(filePath);
		if (dict.empty())
			return false;
		path = dict["path"].asString();
		if (!initWithDictionary(dict)) {
			cache->unloadParticle(path);
			return false;
		}

		return true;
	}
bool BillboardParticleSystem::initWithDictionary(ValueMap& dictionary)
{
    return initWithDictionary(dictionary, "");
}