cocos2d-x v3.0新特性及使用

八月份cocos2d-x官网发布了v3.0版本，这次更新的内容特别多，包括2dx的架构以及使用

总得来说，给开发者带来了很大的便利：

运行环境需求：

• Android 2.3 or newer
• iOS 5.0 or newer
• OS X 10.7 or newer
• Windows (which version?)
• Linux Ubuntu 12.04 (or newer)

编译环境需求：

• Xcode 4.6 (for iOS or Mac)
• gcc 4.7 for Linux or Android. For Android ndk-r8e or newer is required.
• Visual Studio 2012 (for Windows)

重要更新内容：

• Replace Objective-C patters with C++ (C++11) patterns and best practices
• Improve Labels
• Improve renderer

其中C++ 11 新特性：

A subset of C++11 features are being used in cocos2d-x:

• std::function, including lambda objects for callbacks
• strongly typed enums, for most of the cocos2d-x enums and constants
• std::thread for threading
• override context keyword, for overriden methods

st  std::function

• CallFunc can be created with an std::function<void()>
• CallFuncN can be created with an std::function<void(Node*)>
• CallFuncND and CallFuncO were removed since it can be created with simulated with CallFuncN and CallFunc. See ActionsTest.cpp for more examples
• MenuItem supports std::function<void(Node*)> as callbacks

强大枚举类型更新：

Examples:

v2.1	v3.0
kCCTexture2DPixelFormat_RGBA8888	Texture2D::PixelFormat::RGBA8888
kCCDirectorProjectionCustom	Director::Projection::CUSTOM
ccGREEN	Color3B::GREEN
CCPointZero	Point::ZERO
CCSizeZero	Size::ZERO

The old values can still be used, but are not deprecated.

override

当虚函数被override关健字修饰时，子类实现时有override标记

    Removed Objective-C patterns

移除了所有Object-c模式，删除了CC前辍使用纯C++函数

对于类的使用改变：

2dx-3.0 两也不用使用using coco2d namespace

     clone() instead of copy()

clone() returns an autoreleased version of the copy.

copy() is no longer supported. If you use it, it will compile, but the code will crash.

Example:

1// v2.1
2CCMoveBy *action = (CCMoveBy*) move->copy();
3action->autorelease();
4
5// v3.0
6// No need to do autorelease, no need to do casting.
7auto action = move->clone();

     

     Singletons use getInstance() and destroyInstance()

All singletons use getInstance() and destroyInstance() (if applicable) to get and destroy the instance.

Examples:

v2.1	v3.0
CCDirector->sharedDirector()	Director->getInstance()
CCDirector->endDirector()	Director->destroyInstance()
etc...

v2.1 methods are still available, but they were tagged as deprecated.

     getters

Getters now use the get prefix.

Examples:

v2.1	v3.0
node->boundingBox()	node->getBoundingBox()
sprite->nodeToParentTransform()	sprite->getNodeToParentTransform()
etc...

And getters were also tagged as const in their declaration. Example:

1// v2.1
2virtual float getScale();
3
4// v3.0
5virtual float getScale() const;

v2.1 methods are still available, but they were tagged as deprecated.

     POD types

Methods that were receiving POD types as arguments (eg: TexParams, Point, Size, etc.) are being passed as constreference.

Example:

1// v2.1
2void setTexParameters(ccTexParams* texParams);
3
4// v3.0
5void setTexParameters(const ccTexParams& texParams);

   Misc API Changes

  ccTypes.h

Remove cc prefix for structure names in ccTypes.h, move global functions into static member functions, and move global constants into const static member variables.

structure name before changing	structure name after changing
ccColor3B	Color3B
ccColor4B	Color4B
ccColor4F	Color4F
ccVertex2F	Vertex2F
ccVertex3F	Vertex3F
ccTex2F	Tex2F
ccPointSprite	PointSprite
ccQuad2	Quad2
ccQuad3	Quad3
ccV2F_C4B_T2F	V2F_C4B_T2F
ccV2F_C4F_T2F	V2F_C4F_T2F
ccV3F_C4B_T2F	V3F_C4B_T2F
ccV2F_C4B_T2F_Triangle	V2F_C4B_T2F_Triangle
ccV2F_C4B_T2F_Quad	V2F_C4B_T2F_Quad
ccV3F_C4B_T2F_Quad	V3F_C4B_T2F_Quad
ccV2F_C4F_T2F_Quad	V2F_C4F_T2F_Quad
ccBlendFunc	BlendFunc
ccT2F_Quad	T2F_Quad
ccAnimationFrameData	AnimationFrameData

Global functions changed example

 1
 2// in v2.1
 3ccColor3B color3B = ccc3(0, 0, 0);
 4ccc3BEqual(color3B, ccc3(1, 1, 1));
 5ccColor4B color4B = ccc4(0, 0, 0, 0); 
 6ccColor4F color4F = ccc4f(0, 0, 0, 0);
 7color4F = ccc4FFromccc3B(color3B);
 8color4F = ccc4FFromccc4B(color4B);
 9ccc4FEqual(color4F, ccc4F(1, 1, 1, 1));
10color4B = ccc4BFromccc4F(color4F);
11
12color3B = ccWHITE;
13
14// in v3.0
15Color3B color3B = Color3B(0, 0, 0);
16color3B.equals(Color3B(1, 1, 1));
17Color4B color4B = Color4B(0, 0, 0, 0);
18Color4F color4F = Color4F(0, 0, 0, 0);
19color4F = Color4F(color3B);
20color4F = Color4F(color4B);
21color4F.equals(Color4F(1, 1, 1, 1));
22color4B = Color4B(color4F);
23
24color3B = Color3B::WHITE;

  deprecated functions and global variables

old name	new name
ccp	Point
ccpNeg	Point::-
ccpAdd	Point::+
ccpSub	Point::-
ccpMult	Point::*
ccpMidpoint	Point::getMidpoint
ccpDot	Point::dot
ccpCrosss	Point::cross
ccpPerp	Point::getPerp
ccpRPerp	Point::getRPerp
ccpProject	Point::project
ccpRotate	Point::rotate
ccpUnrotate	Point::unrotate
ccpLengthSQ	Point::getLengthSq()
ccpDistanceSQ	Point::getDistanceSq
ccpLength	Point::getLength
ccpDistance	Point::getDistance
ccpNormalize	Point::normalize
ccpForAngle	Point::forAngle
ccpToAngle	Point::getAngle
ccpClamp	Point::getClampPoint
ccpFromSize	Point::Point
ccpCompOp	Point::compOp
ccpLerp	Point::lerp
ccpFuzzyEqual	Point::fuzzyEqual
ccpCompMult	Point::Point
ccpAngleSigned	Point::getAngle
ccpAngle	Point::getAngle
ccpRotateByAngle	Point::rotateByAngle
ccpLineInersect	Point::isLineIntersect
ccpSegmentIntersect	Point::isSegmentIntersect
ccpIntersectPoint	Point::getIntersectPoint
CCPointMake	Point::Point
CCSizeMake	Size::Size
CCRectMake	Rect::Rect
PointZero	Point::ZERO
SizeZero	Size::ZERO
RectZero	Rect::ZERO
TiledGrid3DAction::tile	TiledGrid3DAction::getTile
TiledGrid3DAction::originalTile	TiledGrid3DAction::getOriginalTile
TiledGrid3D::tile	TiledGrid3D::getTile
TiledGrid3D::originalTile	TiledGrid3D::getOriginalTile
Grid3DAction::vertex	Grid3DAction::getVertex
Grid3DAction::originalVertex	Grid3DAction::getOriginalVertex
Grid3D::vertex	Grid3D::getVertex
Grid3D::originalVertex	Grid3D::getOriginalVertex
Configuration::sharedConfiguration	Configuration::getInstance
Configuration::purgeConfiguration	Configuration::destroyInstance()
Director::sharedDirector()	Director::getInstance()
FileUtils::sharedFileUtils	FileUtils::getInstance
FileUtils::purgeFileUtils	FileUtils::destroyInstance
EGLView::sharedOpenGLView	EGLView::getInstance
ShaderCache::sharedShaderCache	ShaderCache::getInstance
ShaderCache::purgeSharedShaderCache	ShaderCache::destroyInstance
AnimationCache::sharedAnimationCache	AnimationCache::getInstance
AnimationCache::purgeSharedAnimationCache	AnimationCache::destroyInstance
SpriteFrameCache::sharedSpriteFrameCache	SpriteFrameCache::getInstance
SpriteFrameCache:: purgeSharedSpriteFrameCache	SpriteFrameCache::destroyInstance
NotificationCenter::sharedNotificationCenter	NotificationCenter::getInstance
NotificationCenter:: purgeNotificationCenter	NotificationCenter::destroyInstance
Profiler::sharedProfiler	Profiler::getInstance
UserDefault::sharedUserDefault	UserDefault::getInstance
UserDefault::purgeSharedUserDefault	UserDefault::destroyInstance
Application::sharedApplication	Application::getInstance
ccc3()	Color3B()
ccc3BEqual()	Color3B::equals()
ccc4()	Color4B()
ccc4FFromccc3B()	Color4F()
ccc4f()	Color4F()
ccc4FFromccc4B()	Color4F()
ccc4BFromccc4F()	Color4B()
ccc4FEqual()	Color4F::equals()
ccWHITE	Color3B::WHITE
ccYELLOW	Color3B::YELLOW
ccBLUE	Color3B::BLUE
ccGREEN	Color3B::GREEN
ccRED	Color3B::RED
ccMAGENTA	Color3B::MAGENTA
ccBLACK	Color3B::BLACK
ccORANGE	Color3B::ORANGE
ccGRAY	Color3B::GRAY
kBlendFuncDisable	BlendFunc::BLEND_FUNC_DISABLE

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创建新项目：

 v3.0不再需要创建Xcode模版，使用create-multi-platform-projects.py来创建一个跨平台的项目，使用方法

 1，cd 到2dx根目录，MAC平台使用./create-multi-platform-projects.py  然后提示：

-bash: ./create-multi-platform-projects.py: /usr/bin/evn: bad interpreter: No such file or directory

没关系，我们打开.py文件，发现其实引用的是tools/project_creator/create_project.py 这文件

 2，我们再cd 到project_creator文件中，使用 ./create_project.py -p <PROJECT_NAME> -k <PACKAGE_NAME> -l <cpp|lua|javascript>

 3，这样我们就可以在2dx的projects文件夹中找到创建好的项目

关于项目的选择：

图示：

红包点选就可以选择对应运行平台