public void ChangeStateTest()
{
uint size = 25;
GameOfLife gof = new GameOfLife(size);
int? oldState = gof[0, 0];
CoordState stateChange;
if (oldState == null)
{
stateChange = new CoordState(0, 0, 1);
}
else
{
stateChange = new CoordState(0, 0, null);
}
gof.ChangeState(stateChange);
int? newState = gof[0, 0];
Assert.AreNotEqual(oldState, newState);
}
/// <summary>
/// Makes a day go by, updating the fields
/// corresponding to the set of rules.
/// </summary>
public void NextDay()
{
List<CoordState> updates = new List<CoordState>();
//Makes a copy of the world in order to have a reference
//which will not be changed when updating the original.
int?[,] worldCopy = GetWorldCopy();
//Loop through the cells of the world
for (int x = 0; x < Size; x++)
{
for (int y = 0; y < Size; y++)
{
//Amount of neighboring species
int zombies = 0;
int alive = 0;
//Loop through the 8 neighboring tiles
for (int i = -1; i <= 1; i++)
{
for (int j = -1; j <= 1; j++)
{
//If we're on the initial field we're
//testing from, we do nothing
if (i == 0 && j == 0) { }
else if(IsValidPoint(x+i, y+j))
{
//Get the state of the cell and
//increment the corresponding counter
int? state = worldCopy[x + i, y + j];
if (state == null) { zombies++; }
else if (state == 1) { alive++; }
}
}
}
//If the cell is either dead or alive, process it
CoordState self = new CoordState(x, y, worldCopy[x, y]);
if (self.State == 1)
{
CoordState newState = ProcessLiveCell(self, zombies, alive);
if (!newState.Equals(self))
{
updates.Add(newState);
}
}
else if (self.State == 0)
{
CoordState newState = ProcessDeadCell(self, alive);
if(!newState.Equals(self))
{
updates.Add(newState);
}
}
}
}
//Change the state of all the updates
ChangeState(updates.ToArray());
}
/// <summary>
/// Processes the cell according to the rules given to living cells
/// </summary>
/// <param name="curState">The current state of the cell</param>
/// <param name="zombies">Number of neighboring zombies</param>
/// <param name="alive">Number of neighboring living cells</param>
/// <returns>The new state of the cell</returns>
private CoordState ProcessLiveCell(CoordState curState, int zombies, int alive)
{
CoordState newState = curState;
if (alive <= 1) { newState = new CoordState(curState.X, curState.Y, 0); }
else if (alive == 2 && alive == 3) { newState = new CoordState(curState.X, curState.Y, 1); }
else if (alive >= 4) { newState = new CoordState(curState.X, curState.Y, 0); }
else if (zombies >= 1)
{
int? state;
Random rnd = new Random();
double num = rnd.NextDouble();
if (num < 0.5) { state = 1; }
else { state = null; }
newState = new CoordState(curState.X, curState.Y, state);
}
return newState;
//ChangeState(newState);
}
/// <summary>
/// Processes the cell according to the rules given to dead cells
/// </summary>
/// <param name="curState">The current state of the cell</param>
/// <param name="alive">Number of neighboring living cells</param>
/// <returns>The new state of the cell</returns>
private CoordState ProcessDeadCell(CoordState curState, int alive)
{
CoordState newState = curState;
if (alive == 3) { newState = new CoordState(curState.X, curState.Y, 1); }
return newState;
//ChangeState(newState);
}