public void compute() {
super.compute();
if (graph instanceof AntCo2Graph) {
AntCo2Graph ag = (AntCo2Graph) graph;
double s = 0;
for (Colony c : ag.getAntContext().eachColony())
s =
max(
s,
(double) c.getMigrationCountForThisStep()
/ (double) c.getNodeCountAtStepBeginning());
m = s;
} else throw new ClassCastException("graph is not a AntCo2Graph");
}