C++/SDL loading array of strings from lua - c++

Question

I'm using lua to load my maps in C++/SDL and i have an array in lua that determines the location of the tile image but I don't know how to transfer it to an array in C++ I've looked for an explanation but they all deal with ints and the lua files only have 1 array and for some reason the code doesn't work this is probably a stupid question but yeah
Here is the code:
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
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

You cannot get whole array at once.
Use looping to get all the strings.
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);
}