box-o-sand/intro-to-crafty/src/components.js

Crafty.c('Grid', {
  init: function() {
    this.attr({
      w: Game.map_grid.tile.width,
      h: Game.map_grid.tile.height
    })
  },

  at: function(x, y) {
    if (x === undefined && y === undefined) {
      return {
        x: this.x / Game.map_grid.tile.width,
        y: this.y / Game.map_grid.tile.height
      }
    } else {
      this.attr({
        x: x * Game.map_grid.tile.width,
        y: y * Game.map_grid.tile.height
      });
      return this;
    }
  }
});

Crafty.c('Actor', {
  init: function() {
    this.requires('2D, Canvas, Grid');
  }
});

Crafty.c('Tree', {
  init: function() {
    this.requires('Actor, Color')
      .color('rgb(20, 125, 40)');
  }
});

Crafty.c('Bush', {
  init: function() {
    this.requires('Actor, Color')
      .color('rgb(20, 185, 40)');
  }
});