mar24

PImage
  tiles,
  tile;

int
  tileSize = 32,
  mapSize = 20,
  tilesX = tileSize * (mapSize + 2),
  tilesWidth = 9, // kiek telpa tile'ų į tile'ų rinkinio plotį
  chosen = -1;

int column = -1, row = -1;

void setup () {
   size (992, 640);
   noFill ();
   stroke (255, 50);
   textSize (tileSize);

   tiles = loadImage ("data/tileset2.png");
}

void grid () {
  noFill();
  for (int y = 0; y < mapSize; ++y) {
    for (int x = 0; x < mapSize; ++x)
      square (x * tileSize, y * tileSize, tileSize);
  }
}

void choose () {
  // gaunam pasirinkto tile'o numerį
      if (mouseX > tilesX && mouseX < tilesX + tiles.width && mousePressed) {
           column = (mouseX - tilesX) / tileSize;
            row = mouseY / tileSize; // 4.9 -> 4
            //println (mouseY, row);
        chosen = column + (row * tilesWidth);
        //chosen = row * tilesWidth;
      }
    // atvaizduojam pasirinkto tile'o numerį
      fill (0);
      //text (chosen, width * 0.9, height * 0.95);
      text (str(mouseY) + "; " + str (row) + "; " + str (chosen), width * 0.7, height * 0.95);
   // išsikerpam tile'ą iš viso rinkinio
     int x = column * tileSize,
         y = row * tileSize;
     tile = tiles.get(x, y, tileSize, tileSize);
      image (tile, mouseX - tileSize / 2, mouseY - tileSize / 2);
}

void draw () {
  background (85, 180, 255);
  image (tiles, tilesX, 0);
  grid ();
  choose ();
}