Adds getScene() to Node

helper function to get the Scene containing the Node

cocos/2d/CCNode.cpp

@@ -518,6 +518,13 @@ void Node::setShaderProgram(GLProgram *pShaderProgram)
     _shaderProgram = pShaderProgram;
 }
 
+Scene* Node::getScene()
+{
+    if(!_parent)
+        return nullptr;
+    return _parent->getScene();
+}
+
 Rect Node::getBoundingBox() const
 {
     Rect rect = Rect(0, 0, _contentSize.width, _contentSize.height);

cocos/2d/CCNode.h

@@ -53,6 +53,7 @@ class ActionManager;
 class Component;
 class ComponentContainer;
 class EventDispatcher;
+class Scene;
 #ifdef CC_USE_PHYSICS
 class PhysicsBody;
 #endif
@@ -910,6 +911,11 @@ public:
      */
     virtual void visit();
 
+    /** Returns the Scene that contains the Node.
+     It returns `nullptr` if the node doesn't belong to any Scene.
+     This function recursively calls parent->getScene() until parent is a Scene object. The results are not cached. It is that the user caches the results in case this functions is being used inside a loop.
+     */
+    virtual Scene* getScene();
 
     /**
      * Returns a "local" axis aligned bounding box of the node.

cocos/2d/CCScene.cpp

@@ -83,6 +83,11 @@ std::string Scene::getDescription() const
     return StringUtils::format("<Scene | tag = %d>", _tag);
 }
 
+Scene* Scene::getScene()
+{
+    return this;
+}
+
 #ifdef CC_USE_PHYSICS
 Scene *Scene::createWithPhysics()
 {

cocos/2d/CCScene.h

@@ -56,6 +56,8 @@ public:
     static Scene *createWithPhysics();
 #endif
 
+    // Overrides
+    virtual Scene *getScene() override;
 
 #ifdef CC_USE_PHYSICS
 public:
@@ -76,6 +78,7 @@ protected:
 #endif // CC_USE_PHYSICS
 
 
+
 protected:
     Scene();
     virtual ~Scene();