///// <summary>
///// Gets the color of the draw.
///// </summary>
///// <value>
///// The color of the draw.
///// </value>
// public override Color DrawColor
// {
// get
// {
// return this.Settings.FishColor;
// }
// }
/// <summary>
/// Steps of fish.
/// </summary>
public override void Step()
{
// increase lifetime
this.Lifetime++;
if (this.BreedMoveStep())
{
WatorSimulation.ChangeFishPopulation(true);
}
// set step down - animal moved
this.IsMoved = true;
}
/// <summary>
/// Steps of shark.
/// </summary>
public override void Step()
{
bool lockTaken = false;
// increase lifetime
this.Lifetime++;
// find fish around
var preyFieldDirection = this.GetRandomFishDirectionAround();
var preyField = this.GetFieldFromDirection(preyFieldDirection);
// shark eats a fish if found
if (preyField != null)
{
try
{
if (this.CheckLockRequired(preyFieldDirection, preyField))
{
Monitor.Enter(preyField, ref lockTaken);
}
// check again fish is on field - could be changed in meantime
if (preyField.Animal != null)
{
// clear own old animal space
this.Field.Animal = null;
// fish dies (clear animal.field and field.animal)
preyField.Animal.Die();
WatorSimulation.ChangeFishPopulation(false);
// fish is dead place shark on field
preyField.Animal = this;
// set fíeld as new place for shark
this.Field = preyField;
}
}
finally
{
if (lockTaken)
{
Monitor.Exit(preyField);
}
}
}
else
{
// if no fish found - increase starve
this.Starve++;
if (this.Starve > this.Settings.SharkStarveTime)
{
// shark dies (animal.field null and field.animal.null)
this.Die();
WatorSimulation.ChangeSharkPopulation(false);
return;
}
}
// execute breed and move
if (this.BreedMoveStep())
{
WatorSimulation.ChangeSharkPopulation(true);
}
// set step down - animal moved
this.IsMoved = true;
}