private static PathGraph[] CycleCrossover(PathGraph Parent1, PathGraph Parent2)
{
Mark[] P1Marked = new Mark[Parent1.Count];
Mark[] P2Marked = new Mark[Parent1.Count];
PathGraph Child1 = new PathGraph(Parent1.Count, Parent1.SupersetGraph);
PathGraph Child2 = new PathGraph(Parent1.Count, Parent1.SupersetGraph);
for (int i = 1; i < Parent1.Count - 1; ++i)
{
if (P1Marked[Parent1[i].Index].IsMarked == true)
{
continue;
}
Graph.Vertex X1 = Parent1[i]; P1Marked[X1.Index].Set(true, i);
Graph.Vertex X2 = Parent2[i]; P2Marked[X2.Index].Set(true, i);
do
{
X1 = Parent1[Parent1.IndexOf(X2)]; P1Marked[X1.Index].Set(true, i);
X2 = Parent2[Parent1.IndexOf(X2)]; P2Marked[X2.Index].Set(true, i);
} while (X2 != Parent1[i]);
}
// Set initial and final vertices to 0
Child1[0] = Parent1[0];
Child2[0] = Parent1[0];
Child1[Parent1.Count - 1] = Parent1[0];
Child2[Parent1.Count - 1] = Parent1[0];
// Fill the children from cycles detected above
for (int i = 1; i < Parent2.Count - 1; ++i)
{
if (P1Marked[Parent1[i].Index].Order % 2 == 0) // 1, 3, 5 - Cycles
{
Child1[i] = Parent1[i];
Child2[i] = Parent2[i];
}
else // 2, 4, 6 - Cycles
{
Child1[i] = Parent2[i];
Child2[i] = Parent1[i];
}
}
return(new PathGraph[] { Child1, Child2 });
}