/*
* Method used for moving any creature, it's checking
* if the creature is old enough for spawn and is it
* old enough to die
* */
private void MoveCreature(Creature creature, int x, int y)
{
if (creature != null)
{
if (!IsAlive(creature, x, y))
{
return;
}
if (CheckForSpawn(creature))
{
return;
}
if (creature is Shark)
{
MoveShark((Shark)creature, x, y);
}
else
{
MoveSepia((Sepia)creature, x, y);
}
}
}
/*
* Checking of the creature - creature can
* change it's location to position (x, y)
* */
private bool IsLegal(Creature creature, int x, int y)
{
if (x < 0 || y < 0)
{
return false;
}
if (x >= _simulationField.GetLength(0) || y >= _simulationField.GetLength(1))
{
return false;
}
if (creature is Sepia && _simulationField[x, y] is Sepia)
{
return false;
}
if (creature is Shark && _simulationField[x, y] is Shark)
{
return false;
}
return true;
}
/*
* Finding the next position for any creature with current coordinates (x, y)
* */
private Library.Pair FindPlaceForSepia(Creature creature, int x, int y)
{
bool positionFound = false;
Random rand = new Random();
Library.Pair newPosition = new Library.Pair(0, 0);
MixPositions();
for (int i = 0; i < _positionsCatalog.Count; i++)
{
if (IsLegal(creature, _positionsCatalog[i].X + x, _positionsCatalog[i].Y + y))
{
newPosition.X = _positionsCatalog[i].X + x;
newPosition.Y = _positionsCatalog[i].Y + y;
positionFound = true;
}
}
if (!positionFound)
{
newPosition.X = x;
newPosition.Y = y;
}
return newPosition;
}
/*
* This method is checking if any creature is old enough to be removed
* from the simulation ground. If the creature is shark
* this method is also checking if it's hunger.
* */
private bool IsAlive(Creature creature, int x, int y)
{
if (creature.Age <= 0)
{
KillCreature(x, y);
return false;
}
else
{
creature.Age--;
}
if (creature is Shark)
{
if (((Shark)creature).Hunger >= ((Shark)creature).MaxHunger)
{
KillCreature(x, y);
return false;
}
else
{
((Shark)creature).Hunger++;
}
}
return true;
}
/*
* Increacing the population if any creature is older than 1/3 of it's life
* */
private bool CheckForSpawn(Creature creature)
{
if (creature is Shark)
{
return CheckForSpawnShark((Shark)creature);
}
else
{
return CheckForSpawnSepia((Sepia)creature);
}
}