tile.js

Game.Tile = function(properties) {
    properties = properties || {};
    // Call the Glyph constructor with our properties
    Game.Glyph.call(this, properties);
    // Set up the properties. We use false by default.
    let vary = properties['vary'] || false;
    this._walkable = properties['walkable'] || false;
    this._diggable = properties['diggable'] || false;
    this._blocksLight = (properties['blocksLight'] !== undefined) ? properties['blocksLight'] : true;
    this._description = properties['description'] || '';
    this._flammable = properties['flammable'] || false;
    this._lifespan = properties['lifespan'] || 0;
    this._isWater = properties['isWater'] || false;
    if (vary) {
        this._background =  ROT.Color.toHex(ROT.Color.randomize(ROT.Color.fromString(this._background), [0, 0, 0]));
     }
};
// Make tiles inherit all the functionality from glyphs
Game.Tile.extend(Game.Glyph);

// Standard getters
Game.Tile.prototype.isWalkable = function() {
    return this._walkable;
}
Game.Tile.prototype.isDiggable = function() {
    return this._diggable;
}
Game.Tile.prototype.isFlammable = function() {
    return this._flammable;
}
Game.Tile.prototype.isBlockingLight = function() {
    return this._blocksLight;
}
Game.Tile.prototype.getDescription = function() {
    return this._description;
};

Game.Tile.prototype.getNeighborPositions = function() {
    let tiles = [];
    // Generate all possible offsets
    for (let dX = -1; dX < 2; dX ++) {
        for (let dY = -1; dY < 2; dY++) {
            // Make sure it isn't the same tile
            if (dX == 0 && dY == 0) {
                continue;
            }
            tiles.push({x: this._x + dX, y: this._y + dY});
        }
    }
    return Game.randomize(tiles);
}