/// <summary>
/// Creates a node from a serialized definition
/// </summary>
public StretchNode(string definition)
{
var split = StretchParser.Tokens(definition);
Name = split[0];
Weights = split.Skip(1).Select(x => int.Parse(x)).ToArray();
}
/// <summary>
/// Initializes a new instance of the <see cref="T:GeneticSharp.Extensions.Stretch.StretchFitness"/> class.
/// </summary>
/// <param name="definition">Definition.</param>
public StretchFitness(string definition)
{
var rows = StretchParser.Rows(definition);
var sizes = StretchParser.Tokens(rows[0]);
Width = int.Parse(sizes[0]);
Height = int.Parse(sizes[1]);
Nodes = rows.Skip(2).Select(r => new StretchNode(r)).ToArray();
var sumOfAllWeights = Nodes.SelectMany(n => n.Weights).Sum() / 2;
var gridDiagonal = Math.Sqrt(Math.Pow(Width - 1, 2) + Math.Pow(Height - 1, 2));
m_totalWeightedDistanceUpperBound = sumOfAllWeights * gridDiagonal;
}