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| |
| #include "entityaccumulator_p.h" |
| #include "entityvisitor_p.h" |
| |
| QT_USE_NAMESPACE |
| using namespace Qt3DRender::Render; |
| |
| namespace { |
| |
| class Accumulator : public EntityVisitor |
| { |
| public: |
| Accumulator(std::function<bool(Entity *)> predicate, NodeManagers *manager) |
| : EntityVisitor(manager) |
| , m_predicate(predicate) |
| { |
| } |
| |
| EntityVisitor::Operation visit(Entity *entity) override { |
| if (m_predicate(entity)) |
| m_entities << entity; |
| return Continue; |
| } |
| |
| QVector<Entity *> m_entities; |
| |
| private: |
| std::function<bool(Entity *)> m_predicate; |
| }; |
| |
| } |
| |
| EntityAccumulator::EntityAccumulator(NodeManagers *manager) |
| : m_manager(manager) |
| , m_predicate([](Entity*) { return true; }) |
| { |
| |
| } |
| |
| EntityAccumulator::EntityAccumulator(std::function<bool (Entity *)> predicate, NodeManagers *manager) |
| : m_manager(manager) |
| , m_predicate(predicate) |
| { |
| |
| } |
| |
| /*! |
| * \internal |
| * |
| * Call this to traverse the scene graph and return all entities for |
| * which the predicate returns true. |
| * |
| * Can be useful to get all the entities that contain a specific type |
| * of component. |
| */ |
| QVector<Entity *> EntityAccumulator::apply(Entity *root) const |
| { |
| Accumulator a(m_predicate, m_manager); |
| a.apply(root); |
| return a.m_entities; |
| } |