private State GetState(LongPoint4D point)
{
if (_state.TryGetValue(point, out Item item))
{
return(item.Previous);
}
return(State.Inactive);
}
private int Run(int steps, LongPoint incX, LongPoint incY, LongPoint incZ, LongPoint incW)
{
IList <LongPoint4D> offsets = new List <LongPoint4D>();
for (long x = incX.X; x <= incX.Y; x++)
{
for (long y = incY.X; y <= incY.Y; y++)
{
for (long z = incZ.X; z <= incZ.Y; z++)
{
for (long w = incW.X; w <= incW.Y; w++)
{
LongPoint4D offset = new LongPoint4D(x, y, z, w);
if (LongPoint4D.Zero != offset)
{
offsets.Add(offset);
}
}
}
}
}
// Initial data size
LongPoint newX = new LongPoint(0, 7);
LongPoint newY = new LongPoint(0, 7);
LongPoint newZ = new LongPoint(0, 0);
LongPoint newW = new LongPoint(0, 0);
do
{
// Increment in each direction
newX += incX;
newY += incY;
newZ += incZ;
newW += incW;
// Compute the new state
Step(offsets, newX, newY, newZ, newW);
}while (--steps > 0);
return(_state.Values.Count(i => i.Previous == State.Active));
}
private void Update(LongPoint4D point, IEnumerable <LongPoint4D> offsets)
{
int activeNeighbors = CountActiveNeighbors(point, offsets);
if (!_state.TryGetValue(point, out Item item))
{
item = new Item()
{
Previous = State.Inactive, Next = State.Inactive
};
_state.Add(point, item);
}
switch (item.Previous)
{
case State.Active:
if (activeNeighbors == 2 || activeNeighbors == 3)
{
item.Next = State.Active;
}
else
{
item.Next = State.Inactive;
}
break;
case State.Inactive:
if (activeNeighbors == 3)
{
item.Next = State.Active;
}
else
{
item.Next = State.Inactive;
}
break;
}
}
private int CountActiveNeighbors(LongPoint4D point, IEnumerable <LongPoint4D> offsets)
{
return(offsets.Count(o => State.Active == GetState(point + o)));
}