// ctor: create a new animal on the specified position of the given world
public Animal(OriginalWatorWorld world, Point position)
{
World = world;
Position = position;
Age = 0;
Moved = true;
Energy = 0;
// place the new animal in the world
World.Grid[position.X, position.Y] = this;
}
// create and initialize a new fish on the specified position of the given world
public Fish(OriginalWatorWorld world, Point position, int age)
: base(world, position)
{
Energy = world.InitialFishEnergy;
Age = age;
}
// create and initialize a shark on the specified position in the given world
public Shark(OriginalWatorWorld world, Point position, int energy)
: base(world, position)
{
Energy = energy;
}