/// <summary>
/// Gets the positions for a given chromosome
/// </summary>
public IEnumerable <StretchPosition> GetPositionsFor(StretchChromosome chromosome)
{
return(chromosome
.GetGenes()
.Select(g => (int)g.Value)
.Select((index, i) => new StretchPosition {
Node = Nodes[i], X = index % Width, Y = index / Width
}));
}
/// <summary>
/// Compute the weighted the distance for a given chromosome.
/// </summary>
public IEnumerable <StretchPair> GetPairsFor(StretchChromosome chromosome)
{
var positions = GetPositionsFor(chromosome).ToArray();
for (var node1 = 0; node1 < Nodes.Length - 1; node1++)
{
var pos1 = positions[node1];
var p1 = new StretchPosition {
Node = Nodes[node1], X = pos1.X, Y = pos1.Y
};
for (var node2 = node1 + 1; node2 < Nodes.Length; node2++)
{
var pos2 = positions[node2];
var p2 = new StretchPosition {
Node = Nodes[node2], X = pos2.X, Y = pos2.Y
};
var weight = Nodes[node1].Weights[node2];
yield return(new StretchPair {
P1 = p1, P2 = p2, Weigth = weight
});
}
}
}
/// <summary>
/// Compute the weighted the distance for a given chromosome.
/// </summary>
public double WeightedDistanceFor(StretchChromosome chromosome)
{
return(GetPairsFor(chromosome)
.Select(p => p.Weigth * Distance(p.P1, p.P2))
.Sum());
}
