Tile identifiers
Author
In every tutorial it says that all you do is give a tile a number, like 1 = grass, 2 = dirt, etc. This is then saved into a map file called "Whatever.Whatever" and looks like:
02030406020
87432689672
83409908835
24782935699
or whatever. This is ridiculous though. Does this mean we are limited to 10 tiles? (0-9) how does the computer know what number is a single digit number and how can it seperate it from the double or triple digit ones? how do you go around this? what will the map save-game look like? thanks
(im using c++ with msvs6)
Easy solution: Use 16 bit values for each tile, and store the number in binary, not ascii. You can now have about 65,000 different tiles.
Author
could you show me an example in a c++ struct please? im not sure to store the numbers in binary.
you dont need a struct, just an array of numbers
int Width; // contains width of the map in tiles, or number of columns
int Height; // contains Height of the map in tiles, or number of rows
int *TileArray = new int[Width*Height];
and then you just access each tile with TileArray[(y*Width)+x] where x,y is the coordinate of the tile you want to access, when you want to save your information then:
later when you want to load a saved map:
int Width; // contains width of the map in tiles, or number of columns
int Height; // contains Height of the map in tiles, or number of rows
int *TileArray = new int[Width*Height];
and then you just access each tile with TileArray[(y*Width)+x] where x,y is the coordinate of the tile you want to access, when you want to save your information then:
FILE *TileFileOut = fopen("yourfilename.bin","wb");fwrite(&Width,sizeof(int),1,TileFileOut); // so, later you know whats the Width of the Tilemapfwrite(&Height,sizeof(int),1,TileFileOut); // so, later you know whats the Height of the Tilemapfwrite(TileArray,sizeof(int),(Width*Height),TileFileOut);fclose(TileFileOut); later when you want to load a saved map:
FILE *TileFileIn = fopen("yourfilename.bin","rb");fread(&Width,sizeof(int),1,TileFileIn); // Get The Width of the Mapfread(&Height,sizeof(int),1,TileFileIn); // Get Height of the MapTileArray = new int[Width*Height]; // allocate memory for the mapfreaf(TileArray,sizeof(int),(Width*Height),TileFileIn);fclose(TileFileIn); This topic is closed to new replies.
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