ScenePtr CreateScene(const char* name){
if (!ValidCStringLength(name)){
Logger::Log(FB_ERROR_LOG_ARG, "invalid arg");
return 0;
}
auto it = mScenes.find(name);
if (it != mScenes.end()){
auto scene = it->second.lock();
if (scene)
return scene;
}
auto scene = Scene::Create(name);
mScenes[name] = scene;
if (mMainScene.expired())
mMainScene = scene;
return scene;
}
void Scene::Linkage::setLeaf(const ScenePtr& root, SceneWeakPtr& newLeaf, bool left) {
ScenePtr target = root;
while (true) {
(left ? target->linkage.leftLeaf : target->linkage.rightLeaf) = newLeaf;
if (newLeaf.expired()) {
newLeaf = target;
}
if (target->linkage.hasParent()
&& (left ?
target->linkage.getParent()->linkage.getFirstChild() :
target->linkage.getParent()->linkage.getLastChild()) == target) {
target = target->linkage.getParent();
}
else {
break;
}
}
}