cocos2d-x 3.x LuaBinding之LUA_FUNCTION

puppet_liu · 2016年04月13日 05:37

用cocos2d-x+lua很久了，一直以来都在学习，相信很多童鞋都会有一个问题，就是从2.x转到3.x的时候会有点不适应，那就是tolua里面不能直接使用LUA_FUNCTION了。之前我也在纠结过，后面看过很多大神的帖子，都是使用ScriptHandlerMgr代替，我也用过，但是感觉不是特别的方便，然后我就折腾了一下tolua的转换，没想到真被我找到方法了。

首先大家先找到这个文件： conversions.yaml。
不出意外的话，应该在这个路径下 /frameworks/cocos2d-x/tools/bindings-generator/targets/lua/conversions.yaml

打开这个文件之后，大家会看到定义了很多内容(大家都不用管)，找到 to_native: 节点，看到这个节点我相信你也就明白是如何绑定c++类了吧。没错，就是你想的这样，在这个节点下面加入一句话就ok了，这句话就是：

“LUA_FUNCTION”: “{out_value} = toluafix_ref_function(tolua_S, {arg_idx}, 0); ok &= ${out_value} >= 0”

加入之后应该是这样的

  to_native:
    # lua to native
    int: "ok &= luaval_to_int32(tolua_S, ${arg_idx},(int *)&${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"
    "unsigned int": "ok &= luaval_to_uint32(tolua_S, ${arg_idx},&${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"
    "unsigned char": "ok &= luaval_to_uint16(tolua_S, ${arg_idx},&${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"
    short: "ok &= luaval_to_int32(tolua_S, ${arg_idx},&${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"
    "unsigned short": "ok &= luaval_to_ushort(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"
    char: "ok &= luaval_to_int32(tolua_S, ${arg_idx},&${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"
    bool: "ok &= luaval_to_boolean(tolua_S, ${arg_idx},&${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"
    float: "ok &= luaval_to_number(tolua_S, ${arg_idx},&${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"
    double: "ok &= luaval_to_number(tolua_S, ${arg_idx},&${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"
    long: "ok &= luaval_to_long(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"
    ssize_t: "ok &= luaval_to_ssize(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"
    "unsigned long": "ok &= luaval_to_ulong(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"
    "long long": "ok &= luaval_to_long_long(tolua_S, ${arg_idx},&${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"
    "std::string": "ok &= luaval_to_std_string(tolua_S, ${arg_idx},&${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"
    "String*": "std::string ${out_value}_tmp; ok &= luaval_to_std_string(tolua_S, ${arg_idx}, &${out_value}_tmp, \"${lua_namespaced_class_name}:${func_name}\"); ${out_value} = cocos2d::String::create(${out_value}_tmp)"
    "char*": "std::string ${out_value}_tmp; ok &= luaval_to_std_string(tolua_S, ${arg_idx}, &${out_value}_tmp, \"${lua_namespaced_class_name}:${func_name}\"); ${out_value} = ${out_value}_tmp.c_str()"
    "Point": "ok &= luaval_to_point(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"
    "Vec2": "ok &= luaval_to_vec2(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"
    "Vec3": "ok &= luaval_to_vec3(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"
    "Vec4": "ok &= luaval_to_vec4(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"
    "Rect": "ok &= luaval_to_rect(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"
    "Size": "ok &= luaval_to_size(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"
    "Color4B": "ok &=luaval_to_color4b(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"
    "Color4F": "ok &=luaval_to_color4f(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"
    "Color3B": "ok &= luaval_to_color3b(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"
    "PhysicsMaterial": "ok &= luaval_to_physics_material(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"
    "Array*": "ok &= luaval_to_array(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"
    "Dictionary*": "ok &= luaval_to_dictionary(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"
    "AffineTransform": "ok &= luaval_to_affinetransform(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"
    "FontDefinition":  "ok &= luaval_to_fontdefinition(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"
    "@Vector<.*>": "ok &= luaval_to_ccvector(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"
    "@Map": "ok &= luaval_to_ccmap_string_key(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"
    "Value": "ok &= luaval_to_ccvalue(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"
    "ValueMap": "ok &= luaval_to_ccvaluemap(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"
    "ValueMapIntKey": "ok &= luaval_to_ccvaluemapintkey(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"
    "ValueVector": "ok &= luaval_to_ccvaluevector(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"
    "@vector": "ok &= luaval_to_std_vector_string(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"
    "@vector": "ok &= luaval_to_std_vector_int(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"
    "kmMat4": "ok &= luaval_to_kmMat4(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"
    "Mat4": "ok &= luaval_to_mat4(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"
    "BlendFunc": "ok &= luaval_to_blendfunc(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"
    "_ttfConfig": "ok &= luaval_to_ttfconfig(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"
    "MeshVertexAttrib": "ok &= luaval_to_mesh_vertex_attrib(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"
    "@vector": "ok &= luaval_to_std_vector_float(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"
    "@vector": "ok &= luaval_to_std_vector_ushort(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"
    "AnimationInfo": "ok &= luaval_to_animationInfo(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"
    "TexParams": "ok &= luaval_to_texparams(tolua_S, ${arg_idx}, &${out_value}, \"${lua_namespaced_class_name}:${func_name}\")"


    object: "ok &= luaval_to_object<${arg.to_string($generator).replace(\"*\", \"\")}>(tolua_S, ${arg_idx}, \"${scriptname}\",&${out_value})"


   "LUA_FUNCTION": "${out_value} = toluafix_ref_function(tolua_S, ${arg_idx}, 0); ok &= ${out_value} >= 0"


  from_native:
    # native to lua
    int: "tolua_pushnumber(tolua_S,(lua_Number)${in_value})"

```



完成之后你就可以写自己的类

#include "cocos2d.h"
#include "CCLuaEngine.h"


USING_NS_CC;
class MyClass:public cocos2d::Ref{
public:
    MyClass();
    MyClass();
 
 
    void test(LUA_FUNCTION nHandler);
}



然后编写ini文件 和genbindings.py文件， 运行导出后就可以在lua里面直接使用了。

cc.MyClass:test(function()


end)