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General / Saving a tile map

« on: August 27, 2013, 04:04:10 pm »

Hello SFML Community,

I have created a class map. Now I want to save this map and therefor I wrote 2 functions within my class Map:

This is the function to open a file

bool Map::open(sf::String dir) // dir will be the directory were the file is but i dont use this for now
{
        delete [] ptiles; //clear the tileset from the old map
        ptiles = 0; //pointer ptiles set to 0 for savety reasons
        tilesetdir.clear(); // clear the old sf::String

        std::fstream in("maps/map2.map", std::ios::in | std::ios::binary);
        if(!in) return false;
        in.read( (char *) &tilesetdir,sizeof(sf::String));

        if(!tileset.loadFromFile(tilesetdir)) return false; //here i try to load the texture
        drawingsprite.setTexture(tileset); // and i set the texture

        in.read( (char *) &mapsize, sizeof(sf::Vector2i));

        ptiles = new textile[mapsize.x*mapsize.y];

        in.read( (char *) ptiles,sizeof(textile)*mapsize.x+mapsize.y);
        in.close();
        return true;
}

And this is the function to save the map:

bool Map::save(sf::String dir) // dir is directory were I want to save to but it is also not used for now
{
        std::fstream out("maps/map2.map", std::ios::out | std::ios::binary );
        if(!out) return false;
        out.write( (char *) &tilesetdir, sizeof(sf::String));
        out.write( (char *) &mapsize, sizeof(sf::Vector2i));
        out.write( (char *) ptiles, sizeof(textile)*mapsize.x*mapsize.y);
        out.flush();
        out.close();
        return true;
}

The data i want to save is:

textile * ptiles; //a pointer on an array of textiles (one dimension)
-----------------------------------------------------------------------------------------------------------------
//this is how the textile looks:
        struct textile
        {
                sf::Vector2<unsigned char> tilepos;
                unsigned char type;
        };

ptiles has the size[mapsize.x*mapsize.y]

sf::String tilesetdir; //a string of the directory of the tileset
sf::Vector2i mapsize; //a vector that stores the mapsize

the masize is used to know how big the array *ptiles has to be

when I try to use the functions it seems to save and when I try to open it it returns false
Now my question is what do i do wrong?
I tried several different ways but none worked properly