/**
* Randomly populate the field with foxes and rabbits.
*/
private void Populate()
{
Random rand = Randomizer.GetRandomGenerator();
Field.Clear();
for (int row = 0; row < Field.Depth; row++)
{
for (int col = 0; col < Field.Width; col++)
{
if (rand.NextDouble() <= FOX_CREATION_PROBABILITY)
{
Location location = new Location(row, col);
Fox fox = new Fox(true, Field, location);
foxes.Add(fox);
}
else if (rand.NextDouble() <= RABBIT_CREATION_PROBABILITY)
{
Location location = new Location(row, col);
Rabbit rabbit = new Rabbit(true, Field, location);
rabbits.Add(rabbit);
}
// else leave the location empty.
}
}
}
/**
* Check whether or not this fox is to give birth at this step.
* New births will be made into free adjacent locations.
* @param newFoxes A list to return newly born foxes.
*/
public void GiveBirth(List <Fox> newFoxes)
{
List <Location> free = field.GetFreeAdjacentLocations(location);
int births = Breed();
for (int b = 0; b < births && free.Count > 0; b++)
{
Location loc = free[0];
free.RemoveAt(0);
Fox young = new Fox(false, field, loc);
newFoxes.Add(young);
}
}
/**
* Run the simulation from its current state for a single step. Iterate
* over the whole field updating the state of each fox and rabbit.
*/
public void SimulateOneStep()
{
step++;
// Provide space for newborn rabbits.
List <Rabbit> newRabbits = new List <Rabbit>();
// Let all rabbits act.
for (int r = 0; r < rabbits.Count; r++)
{
Rabbit rabbit = rabbits[r];
rabbit.Run();
if (!rabbit.IsAlive())
{
rabbits.Remove(rabbit);
}
else
{
rabbit.GiveBirth(newRabbits);
}
}
// Provide space for newborn foxes.
List <Fox> newFoxes = new List <Fox>();
// Let all foxes act.
for (int f = 0; f < foxes.Count; f++)
{
Fox fox = foxes[f];
fox.Hunt();
if (!fox.IsAlive())
{
foxes.Remove(fox);
}
else
{
fox.GiveBirth(newFoxes);
}
}
// Add the newly born foxes and rabbits to the main lists.
rabbits.AddRange(newRabbits);
foxes.AddRange(newFoxes);
//view.ShowStatus(step, field);
}
