從lua加載字符串的數組C++/SDL

Question

我使用lua加載我在C++/SDL中的地圖，並且我在lua中有一個數組來確定平鋪圖像的位置，但我不知道如何傳遞它以C++數組我已經尋找一個解釋，但他們都處理整數和lua文件只有1陣列和由於某種原因代碼不起作用這可能是一個愚蠢的問題，但是是的

這是的代碼：

Map.lua

Tile = {} 

--opens file and reads it 
local file = io.open("../Maps/Map.txt") 
    local n = 0 
    while(n <= 494) do 
     Tile[n] = file:read(1) 
     n = n+1 
    end 
file:close() 
--end of reading file 

n = 0 
local x = 0 

-- creates a new array for the tiles 
whatsTile = {} 
isSolid = {} 

--sets the tiles to their specific image 
while(n <= 494) do 
    if(Tile[n] ~= "\n" and Tile[n] ~= "\r") then 
     if(Tile[n] == '0') then 
      --This is the array in lua that holds the file location 
      whatsTile[x] = "../GameResources/Pictures/Tile1.bmp" 
      --sets this tile to non solid 
      isSolid[x] = 0 
     end 
     --You can add new tiles just set their number and, add a directory for the Bitmap image. 
     --Make sure you set the directory based on where the executable file is, not this script. 
     x = x+1 
    end 
    n = n+1 
end 

的main.cpp

#include <SDL/SDL.h> 
#include <string> 
#include <iostream> 
#include <lua.hpp> 
#include <fstream> 

using namespace std; 

extern "C"{ 
    #include <lua.h> 
    #include <lualib.h> 
    #include <lauxlib.h> 
    #include <luaconf.h> 
} 

void loadMapLua(); 
//This is the array i want to transfer the values into 
string whatsTile[475]; 

int main(int argc, char** argv){ 

    ofstream myfile; 

    SDL_Init(SDL_INIT_EVERYTHING); 

    SDL_Event event; 

    loadMapLua(); 

    SDL_Surface* Screen = SDL_SetVideoMode(800, 608, 32, SDL_SWSURFACE); 
    SDL_Surface* BackGround = SDL_LoadBMP("../GameResources/Pictures/BackGround.bmp"); 
    SDL_Surface* Tiles[475]; 

    const char* c; 

    SDL_Rect Tile[475]; 

    int n = 0; 

    while(n < 475){ 
     c = whatsTile[n].c_str(); 
     Tiles[n] = SDL_LoadBMP(c); 
     Tile[n].w = 32; 
     Tile[n].h = 32; 
     Tile[n].x = n*32; 
     Tile[n].y = (n/25)*32; 
     n ++; 
    } 

    n = 0; 

    myfile.open("trolls.txt"); 
    myfile << whatsTile[0] << endl; 
    myfile.close(); 
    bool gameRunning = true; 

    while(gameRunning){ 
     while(SDL_PollEvent(&event)){ 
      if(event.type == SDL_QUIT){ 
       gameRunning = false; 
      } 
     } 

     SDL_FillRect(Screen, 0, SDL_MapRGB(Screen->format, 255, 255, 255)); 
     SDL_BlitSurface(BackGround, NULL, Screen, NULL); 

     while(n < 475){ 
      SDL_BlitSurface(Tiles[n], NULL, Screen, &Tile[n]); 
      n ++; 
     } 
     SDL_Flip(Screen); 
    } 

    SDL_Quit(); 
    return 0; 
} 

void loadMapLua(){ 
    lua_State* Map = lua_open(); 
    luaL_openlibs(Map); 
    luaL_dofile(Map, "../GameResources/LuaScripts/Map.lua"); 
    lua_pushnil(Map); 
    lua_close(Map); 
} 

Answer 1

您無法一次獲得整個數組。
使用循環獲取所有字符串。

string whatsTile[475]; 
int len_whatsTile = 0; 

void loadMapLua(){ 
    lua_State* L = lua_open(); 
    luaL_openlibs(L); 
    luaL_dofile(L, "../GameResources/LuaScripts/Map.lua"); 
    lua_getglobal(L, "whatsTile"); 
    int Index = 0; 
    do { 
     lua_pushinteger(L, Index++); 
     lua_gettable(L, -2); 
     if (lua_isnil(L, -1)) 
     Index = 0; 
     else 
     whatsTile[len_whatsTile++].assign(lua_tostring(L, -1)); 
     lua_pop(L, 1); 
    } while (Index > 0); 
    lua_close(L); 
}