Adds "Visit Scene Graph" tests

A new tests to measure the performance of visit

Signed-off-by: Ricardo Quesada <ricardoquesada@gmail.com>

samples/Cpp/TestCpp/Classes/PerformanceTest/PerformanceNodeChildrenTest.cpp

@@ -43,6 +43,8 @@ static std::function<NodeChildrenMainScene*()> createFunctions[] =
     CL(RemoveSpriteSheet),
     CL(ReorderSpriteSheet),
     CL(SortAllChildrenSpriteSheet),
+
+    CL(VisitSceneGraph),
 };
 
 #define MAX_LAYER    (sizeof(createFunctions) / sizeof(createFunctions[0]))
@@ -814,6 +816,69 @@ const char*  SortAllChildrenSpriteSheet::profilerName()
     return "sort all children";
 }
 
+
+////////////////////////////////////////////////////////
+//
+// VisitSceneGraph
+//
+////////////////////////////////////////////////////////
+void VisitSceneGraph::initWithQuantityOfNodes(unsigned int nodes)
+{
+    NodeChildrenMainScene::initWithQuantityOfNodes(nodes);
+    scheduleUpdate();
+}
+
+void VisitSceneGraph::updateQuantityOfNodes()
+{
+    auto s = Director::getInstance()->getWinSize();
+
+    // increase nodes
+    if( currentQuantityOfNodes < quantityOfNodes )
+    {
+        for(int i = 0; i < (quantityOfNodes-currentQuantityOfNodes); i++)
+        {
+            auto sprite = Sprite::create("Images/spritesheet1.png", Rect(0, 0, 32, 32));
+            this->addChild(sprite);
+            sprite->setVisible(true);
+            sprite->setPosition(Point(-1000,-1000));
+            sprite->setTag(1000 + currentQuantityOfNodes + i );
+        }
+    }
+
+    // decrease nodes
+    else if ( currentQuantityOfNodes > quantityOfNodes )
+    {
+        for(int i = 0; i < (currentQuantityOfNodes-quantityOfNodes); i++)
+        {
+            this->removeChildByTag(1000 + currentQuantityOfNodes - i -1 );
+        }
+    }
+
+    currentQuantityOfNodes = quantityOfNodes;
+}
+void VisitSceneGraph::update(float dt)
+{
+    CC_PROFILER_START( this->profilerName() );
+    this->visit();
+    CC_PROFILER_STOP( this->profilerName() );
+}
+
+std::string VisitSceneGraph::title()
+{
+    return "K - Performance of visiting the scene graph";
+}
+
+std::string VisitSceneGraph::subtitle()
+{
+    return "calls visit() on scene graph. See console";
+}
+
+const char*  VisitSceneGraph::profilerName()
+{
+    return "visit scene graph";
+}
+
+///----------------------------------------
 void runNodeChildrenTest()
 {
     auto scene = createFunctions[g_curCase]();

samples/Cpp/TestCpp/Classes/PerformanceTest/PerformanceNodeChildrenTest.h

@@ -23,6 +23,7 @@ public:
     virtual std::string title();
     virtual std::string subtitle();
     virtual void updateQuantityOfNodes() = 0;
+    virtual const char* profilerName() = 0;
 
     void updateQuantityLabel();
 
@@ -168,6 +169,18 @@ public:
     virtual const char* profilerName();
 };
 
+class VisitSceneGraph : public NodeChildrenMainScene
+{
+public:
+    void initWithQuantityOfNodes(unsigned int nodes) override;
+
+    virtual void update(float dt) override;
+    void updateQuantityOfNodes() override;
+    virtual std::string title() override;
+    virtual std::string subtitle() override;
+    virtual const char* profilerName() override;
+};
+
 void runNodeChildrenTest();
 
 #endif // __PERFORMANCE_NODE_CHILDREN_TEST_H__