gistfile1.txt

    allPos.forEach(pos => {
      let key = pos2key(pos),
          tile = tiles[key];

      r.transform({
        translate: [pos[0] * bounds.tileSize, pos[1] * bounds.tileSize]
      }, () => {

        if (current) {
          let hitTile = r.checkBounds({
            x: 0,
            y: 0,
            width: bounds.tileSize,
            height: bounds.tileSize
          }, current.epos.x, current.epos.y);

          if (hitTile) {
            current.tile = key;
          }
        }

    if (drag) {
          objForeach(hitTiles, (hitKey, hitDirs) => {
            const hit = hitDirs.every(hitDir =>
              r.checkBounds({
                x: 0,
                y: 0,
                width: bounds.tileSize,
                height: bounds.tileSize
              }, drag.pos.x * bounds.pixelRatio + hitDir[0] * bounds.tileSize,
                            drag.pos.y * bounds.pixelRatio + hitDir[1] * bounds.tileSize)
            );
            if (hit) {
              current.hitTiles[hitKey] = key;
            }
          });
        }

        if (tile) {
          renderTile(bounds.tileSize, tile.number);
        }
      });
    });