COCOS2DX-3.0中如何调用LUA

其实这篇文章不是我写的，是我在cocoachina上看到的一篇精华帖，感觉实在是perfect然后就想抄袭一下，然后……装B一把，嘿嘿，求大神别生气。就这一次，下不为例。

我写了一个用3.0的工具导出类到lua，自动生成代码的方法。

以前要导出c++类到lua，就得手动维护pkg文件，那简直就是噩梦，3.0以后就会感觉生活很轻松了。

下面我就在说下具体做法。
1、安装必要的库和工具包，以及配置相关环境变量，请按照cocos2d-x-3.0rc0\tools\tolua\README.mdown说得去做，不做赘述。

2、写c++类(我测试用的是cocos2d-x-3.0rc0\tests\lua-empty-test\project\Classes\HelloWorldScene.cpp)

3、写一个生成的python脚本，你不会写，没关系，我们会照猫画虎
1）进入目录cocos2d-x-3.0rc0\tools\tolua，复制一份genbindings.py，命名为genbindings_myclass.py

2）把生成目录制定到咱工程里去，打开genbindings_myclass.py把

output_dir='%s/cocos/scripting/lua-bindings/auto' % project_root

?

改成

output_dir='%s/tests/lua-empty-test/project/Classes/auto'% project_root

3）修改命令参数,把

cmd_args={'cocos2dx.ini': ('cocos2d-x','lua_cocos2dx_auto'), \
                    'cocos2dx_extension.ini': ('cocos2dx_extension','lua_cocos2dx_extension_auto'), \
                    'cocos2dx_ui.ini': ('cocos2dx_ui','lua_cocos2dx_ui_auto'), \
                    'cocos2dx_studio.ini': ('cocos2dx_studio','lua_cocos2dx_studio_auto'), \
                    'cocos2dx_spine.ini': ('cocos2dx_spine','lua_cocos2dx_spine_auto'), \
                    'cocos2dx_physics.ini': ('cocos2dx_physics','lua_cocos2dx_physics_auto'), \
                    }

改成

cmd_args={'myclass.ini': ('myclass','lua_myclass_auto') }

4）这时你可能问myclass.ini在哪啊，我们下来就写这个文件。原理一样，我还是照猫画虎，拿cocos2dx_spine.ini改的。

[myclass]
# the prefix to be added to the generated functions. You might or might not use this in your own
# templates
prefix = myclass
  
# create a target namespace (in javascript, this would create some code like the equiv. to `ns = ns || {}`)
# all classes will be embedded in that namespace
target_namespace =
  
android_headers = -I%(androidndkdir)s/platforms/android-14/arch-arm/usr/include -I%(androidndkdir)s/sources/cxx-stl/gnu-libstdc++/4.7/libs/armeabi-v7a/include -I%(androidndkdir)s/sources/cxx-stl/gnu-libstdc++/4.7/include
android_flags = -D_SIZE_T_DEFINED_ 
  
clang_headers = -I%(clangllvmdir)s/lib/clang/3.3/include 
clang_flags = -nostdinc -x c++ -std=c++11
  
cocos_headers = -I%(cocosdir)s/cocos -I%(cocosdir)s/cocos/2d -I%(cocosdir)s/cocos/base -I%(cocosdir)s/cocos/ui -I%(cocosdir)s/cocos/physics -I%(cocosdir)s/cocos/2d/platform -I%(cocosdir)s/cocos/2d/platform/android -I%(cocosdir)s/cocos/math/kazmath -I%(cocosdir)s/extensions -I%(cocosdir)s/external -I%(cocosdir)s/cocos/editor-support -I%(cocosdir)s
  
cocos_flags = -DANDROID -DCOCOS2D_JAVASCRIPT
  
cxxgenerator_headers =
  
# extra arguments for clang
extra_arguments = %(android_headers)s %(clang_headers)s %(cxxgenerator_headers)s %(cocos_headers)s %(android_flags)s %(clang_flags)s %(cocos_flags)s %(extra_flags)s 
  
# what headers to parse
headers = %(cocosdir)s/tests/lua-empty-test/project/Classes/HelloWorldScene.h
  
# what classes to produce code for. You can use regular expressions here. When testing the regular
# expression, it will be enclosed in "^$", like this: "^Menu*$".
classes = HelloWorld
  
# what should we skip? in the format ClassName::[function function]
# ClassName is a regular expression, but will be used like this: "^ClassName$" functions are also
# regular expressions, they will not be surrounded by "^$". If you want to skip a whole class, just
# add a single "*" as functions. See bellow for several examples. A special class name is "*", which
# will apply to all class names. This is a convenience wildcard to be able to skip similar named
# functions from all classes.
  
skip =
  
rename_functions =
  
rename_classes =
  
# for all class names, should we remove something when registering in the target VM?
remove_prefix =
  
# classes for which there will be no "parent" lookup
classes_have_no_parents =
  
# base classes which will be skipped when their sub-classes found them.
base_classes_to_skip = Ref ProcessBase
  
# classes that create no constructor
# Set is special and we will use a hand-written constructor
abstract_classes =
  
# Determining whether to use script object(js object) to control the lifecycle of native(cpp) object or the other way around. Supported values are 'yes' or 'no'.
script_control_cpp = no