fix default camera, add listener for projection change

cocos/2d/CCScene.cpp

@@ -28,6 +28,8 @@ THE SOFTWARE.
 #include "2d/CCScene.h"
 #include "base/CCDirector.h"
 #include "base/CCCamera.h"
+#include "base/CCEventDispatcher.h"
+#include "base/CCEventListenerCustom.h"
 #include "2d/CCLayer.h"
 #include "2d/CCSprite.h"
 #include "2d/CCSpriteBatchNode.h"
@@ -43,6 +45,8 @@ Scene::Scene()
 {
     _ignoreAnchorPointForPosition = true;
     setAnchorPoint(Vec2(0.5f, 0.5f));
+    _event = nullptr;
+    _defaultCamera = nullptr;
 }
 
 Scene::~Scene()
@@ -50,6 +54,8 @@ Scene::~Scene()
 #if CC_USE_PHYSICS
     CC_SAFE_DELETE(_physicsWorld);
 #endif
+    Director::getInstance()->getEventDispatcher()->removeEventListener(_event);
+    CC_SAFE_RELEASE(_event);
 }
 
 bool Scene::init()
@@ -61,8 +67,14 @@ bool Scene::init()
 bool Scene::initWithSize(const Size& size)
 {
     //create default camera
-    auto camera = Camera::create();
-    addChild(camera);
+    _defaultCamera = Camera::create();
+    addChild(_defaultCamera);
+    CCLOG("camera %p", _defaultCamera);
+    
+    _event = Director::getInstance()->getEventDispatcher()->addCustomEventListener(Director::EVENT_PROJECTION_CHANGED, std::bind(&Scene::onProjectionChanged, this, std::placeholders::_1));
+    _event->retain();
+    static int tag = 0;
+    setTag(tag++);
     
     setContentSize(size);
     return true;
@@ -154,8 +166,10 @@ bool Scene::initWithPhysics()
         Director * director;
         CC_BREAK_IF( ! (director = Director::getInstance()) );
         // add camera
-        auto camera = Camera::create();
-        addChild(camera);
+        _defaultCamera = Camera::create();
+        addChild(_defaultCamera);
+        _event = Director::getInstance()->getEventDispatcher()->addCustomEventListener(Director::EVENT_PROJECTION_CHANGED, std::bind(&Scene::onProjectionChanged, this, std::placeholders::_1));
+        _event->retain();
         
         this->setContentSize(director->getWinSize());
         CC_BREAK_IF(! (_physicsWorld = PhysicsWorld::construct(*this)));
@@ -189,6 +203,14 @@ void Scene::addChildToPhysicsWorld(Node* child)
     }
 }
 
+void Scene::onProjectionChanged(EventCustom* event)
+{
+    if (_defaultCamera)
+    {
+        _defaultCamera->initDefault();
+    }
+}
+
 #endif
 
 NS_CC_END

cocos/2d/CCScene.h

@@ -74,6 +74,8 @@ CC_CONSTRUCTOR_ACCESS:
     
     bool init();
     bool initWithSize(const Size& size);
+    
+    void onProjectionChanged(EventCustom* event);
 
 protected:
     friend class Node;
@@ -83,6 +85,8 @@ protected:
     friend class Director;
     
     std::vector<Camera*> _cameras; //weak ref to Camera
+    Camera*              _defaultCamera; //weak ref, default camera created by scene, _cameras[0], Caution that the default camera can not be added to _cameras before onEnter is called
+    EventListenerCustom*       _event;
     
 private:
     CC_DISALLOW_COPY_AND_ASSIGN(Scene);

cocos/base/CCCamera.cpp

@@ -65,20 +65,7 @@ Camera* Camera::createPerspective(float fieldOfView, float aspectRatio, float ne
     auto ret = new Camera();
     if (ret)
     {
-        ret->_fieldOfView = fieldOfView;
-        ret->_aspectRatio = aspectRatio;
-        ret->_nearPlane = nearPlane;
-        ret->_farPlane = farPlane;
-        Mat4::createPerspective(ret->_fieldOfView, ret->_aspectRatio, ret->_nearPlane, ret->_farPlane, &ret->_projection);
-#if CC_TARGET_PLATFORM == CC_PLATFORM_WP8
-        //if needed, we need to add a rotation for Landscape orientations on Windows Phone 8 since it is always in Portrait Mode
-        GLView* view = Director::getInstance()->getOpenGLView();
-        if(view != nullptr)
-        {
-            setAdditionalProjection(view->getOrientationMatrix());
-        }
-#endif
-        ret->_viewProjectionDirty = true;
+        ret->initPerspective(fieldOfView, aspectRatio, nearPlane, farPlane);
         ret->autorelease();
         return ret;
     }
@@ -91,20 +78,7 @@ Camera* Camera::createOrthographic(float zoomX, float zoomY, float nearPlane, fl
     auto ret = new Camera();
     if (ret)
     {
-        ret->_zoom[0] = zoomX;
-        ret->_zoom[1] = zoomY;
-        ret->_nearPlane = nearPlane;
-        ret->_farPlane = farPlane;
-        Mat4::createOrthographic(ret->_zoom[0], ret->_zoom[1], ret->_nearPlane, ret->_farPlane, &ret->_projection);
-#if CC_TARGET_PLATFORM == CC_PLATFORM_WP8
-        //if needed, we need to add a rotation for Landscape orientations on Windows Phone 8 since it is always in Portrait Mode
-        GLView* view = Director::getInstance()->getOpenGLView();
-        if(view != nullptr)
-        {
-            setAdditionalProjection(view->getOrientationMatrix());
-        }
-#endif
-        ret->_viewProjectionDirty = true;
+        ret->initOrthographic(zoomX, zoomY, nearPlane, farPlane);
         ret->autorelease();
         return ret;
     }
@@ -203,6 +177,74 @@ void Camera::setAdditionalProjection(const Mat4& mat)
     getViewProjectionMatrix();
 }
 
+bool Camera::initDefault()
+{
+    auto size = Director::getInstance()->getWinSize();
+    //create default camera
+    auto projection = Director::getInstance()->getProjection();
+    switch (projection)
+    {
+        case Director::Projection::_2D:
+        {
+            initOrthographic(size.width, size.height, -1024, 1024);
+            break;
+        }
+        case Director::Projection::_3D:
+        {
+            float zeye = Director::getInstance()->getZEye();
+            initPerspective(60, (GLfloat)size.width / size.height, 10, zeye + size.height / 2.0f);
+            Vec3 eye(size.width/2, size.height/2.0f, zeye), center(size.width/2, size.height/2, 0.0f), up(0.0f, 1.0f, 0.0f);
+            setPosition3D(eye);
+            lookAt(center, up);
+            break;
+        }
+        default:
+            CCLOG("unrecognized projection");
+            break;
+    }
+    return true;
+}
+
+bool Camera::initPerspective(float fieldOfView, float aspectRatio, float nearPlane, float farPlane)
+{
+    _fieldOfView = fieldOfView;
+    _aspectRatio = aspectRatio;
+    _nearPlane = nearPlane;
+    _farPlane = farPlane;
+    Mat4::createPerspective(_fieldOfView, _aspectRatio, _nearPlane, _farPlane, &_projection);
+#if CC_TARGET_PLATFORM == CC_PLATFORM_WP8
+    //if needed, we need to add a rotation for Landscape orientations on Windows Phone 8 since it is always in Portrait Mode
+    GLView* view = Director::getInstance()->getOpenGLView();
+    if(view != nullptr)
+    {
+        setAdditionalProjection(view->getOrientationMatrix());
+    }
+#endif
+    _viewProjectionDirty = true;
+    
+    return true;
+}
+
+bool Camera::initOrthographic(float zoomX, float zoomY, float nearPlane, float farPlane)
+{
+    _zoom[0] = zoomX;
+    _zoom[1] = zoomY;
+    _nearPlane = nearPlane;
+    _farPlane = farPlane;
+    Mat4::createOrthographic(_zoom[0], _zoom[1], _nearPlane, _farPlane, &_projection);
+#if CC_TARGET_PLATFORM == CC_PLATFORM_WP8
+    //if needed, we need to add a rotation for Landscape orientations on Windows Phone 8 since it is always in Portrait Mode
+    GLView* view = Director::getInstance()->getOpenGLView();
+    if(view != nullptr)
+    {
+        setAdditionalProjection(view->getOrientationMatrix());
+    }
+#endif
+    _viewProjectionDirty = true;
+    
+    return true;
+}
+
 void Camera::unproject(const Size& viewport, Vec3* src, Vec3* dst) const
 {
     assert(dst);

cocos/base/CCCamera.h

@@ -50,6 +50,7 @@ enum class CameraFlag
 */
 class CC_DLL Camera :public Node
 {
+    friend class Scene;
 public:
     /**
     * The type of camera.
@@ -142,6 +143,11 @@ CC_CONSTRUCTOR_ACCESS:
     
     /**set additional matrix for the projection matrix, it multiplys mat to projection matrix when called, used by WP8*/
     void setAdditionalProjection(const Mat4& mat);
+    
+    /** init camera */
+    bool initDefault();
+    bool initPerspective(float fieldOfView, float aspectRatio, float nearPlane, float farPlane);
+    bool initOrthographic(float zoomX, float zoomY, float nearPlane, float farPlane);
 
 protected: