Cocos2dx3.0 detailed steps for exporting custom classes to Lua

I wrote a method to export the class to Lua using the tool 3.0 to automatically generate code.

In the past, to export the C ++ class to Lua, you had to manually maintain the PKG file, which is a nightmare. After 3.0, you will feel that life is easy.

Next I will discuss the specific practices.
1. Install the necessary libraries and toolkit, and configure the relevant environment variables, please follow the cocos2d-x-3.0rc0 \ tools \ tolua \ readme. mdown To Do, Do not repeat.

2, write c ++ class (I tested using cocos2d-x-3.0rc0 \ tests \ LUA-empty-test \ project \ Classes \ helloworldscene. cpp)

3. Write a generated Python script. You won't write it. It doesn't matter. We will show it as a cat or a tiger.
1) enter the directory cocos2d-x-3.0rc0 \ tools \ tolua, copy a copy of genbindings. py, named genbindings_myclass.py
2) Create the generated directory in our project, open genbindings_myclass.py and

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

Change

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

3) modify the command parameters and set

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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‘), \                    }

Change

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

4) at this time, you may ask where myclass. INI is. Let's write this file. The same principle is true. I still use cocos2dx_spine.ini to change it.

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[myclass]# the prefix to be added to the generated functions. You might or might not use this in your own# templatesprefix = 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 namespacetarget_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/includeandroid_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 clangextra_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 parseheaders = %(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" lookupclasses_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 constructorabstract_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

Pay attention to these lines when you change them.

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[myclass]prefix = myclasstarget_namespace =headers = %(cocosdir)s/tests/lua-empty-test/project/Classes/HelloWorldScene.hclasses = HelloWorldskip =abstract_classes =

4, the following to automatically generate the code, open the command line tool, CD to cocos2d-x-3.0rc0 \ tools \ tolua

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1	python genbindings_myclass.py

Press enter to run. If there is no problem before you will be in the cocos2d-x-3.0rc0 \ tests \ LUA-empty-test \ project \ classes with a folder auto, and then generate the inside lua_myclass_auto.cpp and lua_myclass_auto.hpp add drag such as Project

5. Add the module we generated to Lua during Script Engine initialization.
Edit appdelegate. cpp, including the lua_myclass_auto.hpp header file, in

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1	LuaEngine* engine = LuaEngine::getInstance();

Add later

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1	register_all_myclass(engine->getLuaStack()->getLuaState());

6. Compile and run the program. In this way, the helloworld class will be exported to Lua.

Test ------------------------------------------------
Open hello. Lua and edit the local function main ().
Change the preceding content

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local function main()    -- avoid memory leak    collectgarbage("setpause", 100)    collectgarbage("setstepmul", 5000)     local hello = HelloWorld:create()    local sceneGame = cc.Scene:create()    sceneGame:addChild(hello)    cc.Director:getInstance():runWithScene(sceneGame)     if(1==1) then        return    end…………

Cocos2dx3.0 detailed steps for exporting custom classes to Lua