Add support for creating empty sprite3D

cocos/3d/CCSprite3D.cpp

@@ -48,10 +48,23 @@ NS_CC_BEGIN
 
 std::string s_attributeNames[] = {GLProgram::ATTRIBUTE_NAME_POSITION, GLProgram::ATTRIBUTE_NAME_COLOR, GLProgram::ATTRIBUTE_NAME_TEX_COORD, GLProgram::ATTRIBUTE_NAME_TEX_COORD1, GLProgram::ATTRIBUTE_NAME_TEX_COORD2,GLProgram::ATTRIBUTE_NAME_TEX_COORD3,GLProgram::ATTRIBUTE_NAME_NORMAL, GLProgram::ATTRIBUTE_NAME_BLEND_WEIGHT, GLProgram::ATTRIBUTE_NAME_BLEND_INDEX};
 
+Sprite3D* Sprite3D::create()
+{
+    //
+    auto sprite = new (std::nothrow) Sprite3D();
+    if (sprite && sprite->init())
+    {
+        sprite->autorelease();
+        return sprite;
+    }
+    CC_SAFE_DELETE(sprite);
+    return nullptr;
+}
+
 Sprite3D* Sprite3D::create(const std::string &modelPath)
 {
     if (modelPath.length() < 4)
-        CCASSERT(false, "improper name specified when creating Sprite3D");
+        CCASSERT(false, "invalid filename for Sprite3D");
     
     auto sprite = new (std::nothrow) Sprite3D();
     if (sprite && sprite->initWithFile(modelPath))
@@ -241,6 +254,15 @@ Sprite3D::~Sprite3D()
     removeAllAttachNode();
 }
 
+bool Sprite3D::init()
+{
+    if(Node::init())
+    {
+        return true;
+    }
+    return false;
+}
+
 bool Sprite3D::initWithFile(const std::string &path)
 {
     _meshes.clear();

cocos/3d/CCSprite3D.h

@@ -50,6 +50,13 @@ struct NodeData;
 class CC_DLL Sprite3D : public Node, public BlendProtocol
 {
 public:
+    /**
+     * Creates an empty sprite3D without 3D model and texture.
+     *
+     * @return An autoreleased sprite3D object.
+     */
+    static Sprite3D* create();
+    
     /** creates a Sprite3D*/
     static Sprite3D* create(const std::string &modelPath);
   
@@ -138,6 +145,9 @@ CC_CONSTRUCTOR_ACCESS:
     
     Sprite3D();
     virtual ~Sprite3D();
+    
+    bool init();
+    
     bool initWithFile(const std::string &path);
     
     bool initFrom(const NodeDatas& nodedatas, const MeshDatas& meshdatas, const MaterialDatas& materialdatas);

cocos/renderer/CCRenderer.cpp

@@ -328,10 +328,7 @@ void Renderer::addCommand(RenderCommand* command, int renderQueue)
     CCASSERT(renderQueue >=0, "Invalid render queue");
     CCASSERT(command->getType() != RenderCommand::Type::UNKNOWN_COMMAND, "Invalid Command Type");
     
-//    if(command->isTransparent())
+    _renderGroups[renderQueue].push_back(command);
-//        _transparentRenderGroups.push_back(command);
-//    else
-        _renderGroups[renderQueue].push_back(command);
 }
 
 void Renderer::pushGroup(int renderQueueID)

tests/cpp-tests/Classes/Sprite3DTest/Sprite3DTest.cpp

@@ -68,7 +68,8 @@ static std::function<Layer*()> createFunctions[] =
     CL(Sprite3DReskinTest),
     CL(Sprite3DWithOBBPerfromanceTest),
     CL(Sprite3DMirrorTest),
-    CL(QuaternionTest)
+    CL(QuaternionTest),
+    CL(Sprite3DEmptyTest)
 };
 
 #define MAX_LAYER    (sizeof(createFunctions) / sizeof(createFunctions[0]))
@@ -154,6 +155,30 @@ void Sprite3DTestDemo::backCallback(Ref* sender)
     s->release();
 }
 
+//------------------------------------------------------------------
+//
+// Sprite3DEmptyTest
+//
+//------------------------------------------------------------------
+Sprite3DEmptyTest::Sprite3DEmptyTest()
+{
+    auto s = Sprite3D::create();
+    s->setNormalizedPosition(Vec2(.5,.5));
+    auto l = Label::create();
+    l->setString("Test");
+    s->addChild(l);
+    addChild(s);
+}
+
+std::string Sprite3DEmptyTest::title() const
+{
+    return "Testing Sprite3D Container";
+}
+
+std::string Sprite3DEmptyTest::subtitle() const
+{
+    return "Sprite3D can act as containers for 2D objects";
+}
 
 //------------------------------------------------------------------
 //

tests/cpp-tests/Classes/Sprite3DTest/Sprite3DTest.h

@@ -54,6 +54,15 @@ public:
     virtual void onEnter() override;
 };
 
+class Sprite3DEmptyTest : public Sprite3DTestDemo
+{
+public:
+    CREATE_FUNC(Sprite3DEmptyTest);
+    Sprite3DEmptyTest();
+    virtual std::string title() const override;
+    virtual std::string subtitle() const override;
+};
+
 class Sprite3DBasicTest : public Sprite3DTestDemo
 {
 public: