c++ - 如何递归删除Qt3DWindow根实体中的所有节点？

Question

我想删除 Qt3DWindow 根场景的所有根节点。它包含多个层次结构级别的节点。我想删除引用并删除对象。最简单的方法是什么？

Answer 1

我用这个递归函数来做:

void deleteChildrenRecursively(Qt3DCore::QNodeVector& vector)
{
    foreach(Qt3DCore::QNode* node, vector){
        Qt3DCore::QEntity* entity = (Qt3DCore::QEntity*)node;
        QList<Qt3DCore::QComponent*> componentsToDelete;
        foreach(Qt3DCore::QComponent* component, entity->components()){
            entity->removeComponent(component);
            delete(component);
            component = NULL;
        }
        deleteChildrenRecursively(node->childNodes());
        delete(node);
        node = NULL;
    }
}

它递归地删除所有 QEntity 及其 QComponent 对象。

用法:

Qt3DCore::QEntity* rootEntity = new Qt3DCore::QEntity();
view->setRootEntity(rootEntity)
...
deleteChildrenRecursively(rootEntity->childNodes());