public ConwayController(IEnumerable <string> input, int dimensions = DefaultDimensions)
{
//< Hold onto the raw input as a list
this.Source = input.ToList();
//< Retain the dimensionality
this.Dimensions = dimensions;
this.CubeMap = new Dictionary <string, ConwayCube>();
//< Iterate over each row (y)
foreach (int y in Enumerable.Range(0, Source.Count))
{
//< Iterate over each available (x) position
foreach (int x in Enumerable.Range(0, Source[y].Length))
{
char state = Source[y][x];
//< If this cube is active -> add to the map
if (state == ConwayCube.Active)
{
//< Parse the starting position
var pos = GetStartingPosition(x, y, Dimensions);
//< Generate the new ConwayCube object and add to the dimension map
var cube = new ConwayCube(pos, state);
CubeMap.Add(cube.Index, cube);
}
}
}
}
private char GetNewState(IEnumerable <string> neighs, char state)
{
//< Count active neighbour cubes
int numActiveNeighs = neighs.Count(x => CubeMap.ContainsKey(x));
//< Get the resulting state and return it
return(ConwayCube.GetNewState(state, numActiveNeighs));
}
public static IEnumerable <string> GetNeighbours(string index, int dim)
{
//< Get the position array for this index
var pos = ConwayCube.GetPosition(index);
//< Get the neighbouring positions (removing the position at the given index)
var neighs = GetOffsets(dim).Select(offset => GetPosition(pos, offset))
.Select(p => GetPositionString(p))
.Where(idx => idx != index);
return(neighs);
}
public void SimulateSteps(int steps)
{
//< Each cube gets a state change simultaneously
foreach (int step in Enumerable.Range(0, steps))
{
//< Instantiate map of any changes to existing cubes
var changeMap = new Dictionary <string, char>();
//< Instantiate map of any 'new' neighbours to be added after this turn
var neighsToCheck = new HashSet <string>();
//< Iterate over each currently active cube in the current iteration of the map
foreach (var kvp in CubeMap)
{
//< Get all the neighbour positions/indices
var neighs = ConwayCube.GetNeighbours(kvp.Key, Dimensions);
//< Check if we need to change this cube's state
var newState = GetNewState(neighs, kvp.Value.State);
if (newState != kvp.Value.State)
{
changeMap.Add(kvp.Key, newState);
}
//< Add all newly encountered (not in the map) neighbours to be considered
foreach (var neigh in neighs.Where(n => !CubeMap.ContainsKey(n)))
{
if (!neighsToCheck.Contains(neigh))
{
neighsToCheck.Add(neigh);
}
}
}
//< Add any newly-encountered neighbours to the map between turns
foreach (var neigh in neighsToCheck)
{
//< Get all the neighbour positions/indices
var neighs = ConwayCube.GetNeighbours(neigh, Dimensions);
//< Check if we need to change this cube's state
var newState = GetNewState(neighs, ConwayCube.Inactive);
if (newState == ConwayCube.Active)
{
changeMap.Add(neigh, newState);
}
}
//< Apply changes
ApplyChanges(changeMap);
}
}
