cocos2dx——lua自动和手动绑定

概述【自动绑定】 参考：http://my.oschina.net/skyhacker2/blog/298397   主要是通过引擎自带的tools/tolua，主要步骤如下： 1.编写好要导出的c++类，如果是libcocos2d里添加，需要添加导出标记：class CC_DLL Test 2.到tolua目录根据README.mdown配置好环境： * Make sure that you hav

【自动绑定】

参考：http://my.oschina.net/skyhacker2/blog/298397

主要是通过引擎自带的tools/tolua，主要步骤如下：

1.编写好要导出的c++类，如果是libcocos2d里添加，需要添加导出标记：class CC_DLL Test

2.到tolua目录根据README.mdown配置好环境：

* Make sure that you have installed `androID-ndk-r9b`.* Download python2.7.3 (32bit) from (http://www.python.org/ftp/python/2.7.3/python-2.7.3.msi).* Add the installed path of python (e.g. C:\Python27) to windows environment variable named 'PATH'.* Download pyyaml from http://pyyaml.org/download/pyyaml/PyYAML-3.10.win32-py2.7.exe and install it.* Download pyCheetah from https://raw.github.com/dumganhar/my_old_cocos2d-x_backup/download/downloads/Cheetah.zip,unzip it to "C:\Python27\lib\site-packages"* Set environment variables (`NDK_ROOT`)* Go to "cocos2d-x/tools/tolua" folder,and run "genbindings.py". The generated codes will be under "cocos\scripting\auto-generated\Js-bindings".

3.创建一个ini文件，比如 cocos2dx_custom.ini，参照其他的ini自己做一些修改：

# the prefix to be added to the generated functions. You might or might not use this in your own# templatesprefix = cocos2dx_custom# 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 = cc# what headers to parseheaders = %(cocosdir)s/cocos/for_lua/Test.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 = Test.*skip = # classes for which there will be no "parent" lookupclasses_have_no_parents = Testabstract_classes =

4.拷贝一份genbindings_custom.py，修改cmd_args：

cmd_args = {'cocos2dx_custom.ini' : ('cocos2dx_custom','lua_cocos2dx_custom_auto'),\                    }

5.运行 genbindings_custom.py会生成xx_auto.h/cpp到cocos\scripting\lua-bindings\auto目录，然后你添加到引擎的libluacocos2d工程去

6.要在lua中使用，还在启动时注册。现在3.7的版本里AppDelegate::applicationDIDFinishLaunching会调用lua_module_register，所以：

#include "lua_cocos2dx_custom_auto.hpp"#include "fun.h"int lua_module_register(lua_State* L){    register_cocosdenshion_module(L);	register_all_cocos2dx_custom(L);	register_foo(L);    return 1;}

7.然后你就可以在lua里使用了：

-- test custom local msg = cc.Test:helloMsg() print(msg)

【手动绑定】

参考：http://www.tairan.com/archives/5493

1.创建c++类（fun.h)：

#pragma once#include <iostream>#include <sstream>extern "C"{#include <lua.h>#include <lauxlib.h>#include <lualib.h>}class Foo{public:	Foo(const std::string & name) : name(name)	{		std::cout << "Foo is born" << std::endl;	}	std::string Add(int a,int b)	{		std::stringstream ss;		ss << name << ": " << a << " + " << b << " = " << (a + b);		return ss.str();	}	~Foo()	{		std::cout << "Foo is gone" << std::endl;	}private:	std::string name;};voID register_foo(lua_State *L);

2.导出到lua(fun.cpp)：

#include "fun.h"int l_Foo_constructor(lua_State *L) {	const char *name = luaL_checkstring(L,1);	Foo **udata = (Foo**)lua_newuserdata(L,sizeof(Foo*));	*udata = new Foo(name);	luaL_getMetatable(L,"luaL_Foo");	// stack:	// -1	Metatable "luaL_Foo"	// -2	userdata	// -3	string param	lua_setMetatable(L,-2);	return 1;}Foo* l_CheckFoo(lua_State *L,int n) {	return *(Foo**)luaL_checkudata(L,n,"luaL_Foo");}int l_Foo_Add(lua_State *L) {	Foo *foo = l_CheckFoo(L,1);	int a = luaL_checknumber(L,2);	int b = luaL_checknumber(L,3);	std::string s = foo->Add(a,b);	lua_pushstring(L,s.c_str());	// stack:	// -1 result string	// -2 Metatable "luaL_Foo"	// -3 userdata	// -4 string param	return 1;}int l_Foo_destructor(lua_State *L) {	Foo *foo = l_CheckFoo(L,1);	delete foo;	return 0;}voID register_foo(lua_State *L) {	luaL_Reg sFooRefs[] = {		{ "new",l_Foo_constructor },{ "add",l_Foo_Add },{ "__gc",l_Foo_destructor },{ NulL,NulL }	};	luaL_newMetatable(L,"luaL_Foo");	luaL_register(L,NulL,sFooRefs);	lua_pushvalue(L,-1);	// stack:	// -1: Metatable "luaL_Foo"	// -2: Metatable "luaL_Foo"	// this pops the stack	lua_setfIEld(L,-1,"__index");	lua_setglobal(L,"Foo");}

3.启动时注册

4.在lua中使用：

 function Foo:speak()	print("hello,i am a Foo") end local foo = Foo.new("adfan") local m = foo:add(3,4) print(m) foo:speak()  Foo.add_ = Foo.add function Foo:add(a,b)	return "magic: " .. self:add_(a,b) end m = foo:add(9,8) print(m)

说明：手动绑定的话，参照引擎导出的那些manual.cpp即可，用tolua的那些接口很方便，用上面的这种方式主要是展示这个流程 总结

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