Function randomColor

randomColor.js:38–101

(options)

  var colorRanges = [];

  var randomColor = function (options) {
    options = options || {};

    // Check if there is a seed and ensure it's an
    // integer. Otherwise, reset the seed value.
    if (
      options.seed !== undefined &&
      options.seed !== null &&
      options.seed === parseInt(options.seed, 10)
    ) {
      seed = options.seed;

      // A string was passed as a seed
    } else if (typeof options.seed === "string") {
      seed = stringToInteger(options.seed);

      // Something was passed as a seed but it wasn't an integer or string
    } else if (options.seed !== undefined && options.seed !== null) {
      throw new TypeError("The seed value must be an integer or string");

      // No seed, reset the value outside.
    } else {
      seed = null;
    }

    var H, S, B;

    // Check if we need to generate multiple colors
    if (options.count !== null && options.count !== undefined) {
      var totalColors = options.count,
        colors = [];
      // Value false at index i means the range i is not taken yet.
      for (var i = 0; i < options.count; i++) {
        colorRanges.push(false);
      }
      options.count = null;

      while (totalColors > colors.length) {
        var color = randomColor(options);

        if (seed !== null) {
          options.seed = seed;
        }

        colors.push(color);
      }

      options.count = totalColors;

      return colors;
    }

    // First we pick a hue (H)
    H = pickHue(options);

    // Then use H to determine saturation (S)
    S = pickSaturation(H, options);