// Generated by CoffeeScript 1.10.0
(function() {
  var GOSPER_ANGLE, INITIAL_A, draw_hexes, get_coordinates, height, rotate_point, svg, vis, width;

  width = 960;

  height = 500;

  INITIAL_A = height / 2.4;

  GOSPER_ANGLE = Math.acos(5 * Math.sqrt(7) / 14) / Math.PI * 180;

  svg = d3.select('svg').attr({
    width: width,
    height: height,
    viewBox: (-width / 2) + " " + (-height / 2) + " " + width + " " + height
  });

  vis = svg.append('g');

  rotate_point = function(point, theta) {
    var new_point;
    theta = theta * Math.PI / 180;
    return new_point = {
      x: point.x * Math.cos(theta) - point.y * Math.sin(theta),
      y: point.x * Math.sin(theta) + point.y * Math.cos(theta)
    };
  };

  get_coordinates = function(a, index) {
    var coordinates_0, r;
    r = a / Math.sin(Math.PI / 3);
    return coordinates_0 = [
      {
        x: -a,
        y: r + r / 2
      }, {
        x: a,
        y: r + r / 2
      }, {
        x: 0,
        y: 0
      }, {
        x: -2 * a,
        y: 0
      }, {
        x: -a,
        y: -r - r / 2
      }, {
        x: a,
        y: -r - r / 2
      }, {
        x: 2 * a,
        y: 0
      }
    ];
  };

  draw_hexes = function(index, order, max_order) {
    var a, coordinates, g, i, j, k, len, point, ref, results, rotate, transform;
    transform = "";
    for (i = j = ref = index.length - 1; ref <= 0 ? j <= 0 : j >= 0; i = ref <= 0 ? ++j : --j) {
      a = INITIAL_A / Math.pow(Math.sqrt(7), order - i);
      coordinates = get_coordinates(a, index[i]);
      rotate = i === index.length - 1 ? "" : "rotate(" + GOSPER_ANGLE + ")";
      transform += rotate + ("translate(" + coordinates[index[i]].x + ", " + coordinates[index[i]].y + ")");
    }
    g = vis.append('g');
    g.append('path').attr({
      "class": 'hex hex_' + order,
      d: hept_tree_utils.hex_generate_svg_path(a),
      transform: transform
    });
    results = [];
    while (order < max_order && order < index.length) {
      for (i = k = 0, len = coordinates.length; k < len; i = ++k) {
        point = coordinates[i];
        draw_hexes([i].concat(index), order + 1, max_order);
      }
      results.push(order += 1);
    }
    return results;
  };

  draw_hexes([2], 0, Math.random() * 4);

}).call(this);