// method called each time the simulation updates
public boolean act() {
int capacity =
(int)
(0.5 * (parent.getTerrain().getWater())); // A formula to approximate carrying capacity
if (parent.getPop(species) > capacity) {
energy -= 2;
}
// select a target for predation
Organism prey = pickPrey();
if (prey != null)
// hunt the prey only if a target was picked
hunt(prey);
if (Math.random() * 100 < mobility)
// move to an adjacent location randomly (based on mobility)
move();
return super.act(); // do general organism actions
}
