/// <summary>Override; see base.</summary>
public override ConstraintResult Process(SolverState state)
{
for (var cellIx = 0; cellIx < (state.LastPlacedCell != null ? 1 : AffectedCells != null ? AffectedCells.Length : state.GridSize); cellIx++)
{
var cell = state.LastPlacedCell ?? (AffectedCells != null ? AffectedCells[cellIx] : cellIx);
if (state[cell] == null || (AffectedValues != null && !AffectedValues.Contains(state[cell].Value)))
{
continue;
}
foreach (var relatedCell in AdjacentCells(cell, GridWidth, GridHeight, IncludeDiagonals))
{
if (EnforcedCells == null || (EnforcedCellsOnly
? (EnforcedCells.Contains(cell) && EnforcedCells.Contains(relatedCell))
: (EnforcedCells.Contains(cell) || EnforcedCells.Contains(relatedCell))))
{
if (state[cell].Value > state.MinValue && (AffectedValues == null || AffectedValues.Contains(state[cell].Value - 1)))
{
state.MarkImpossible(relatedCell, state[cell].Value - 1);
}
if (state[cell].Value < state.MaxValue && (AffectedValues == null || AffectedValues.Contains(state[cell].Value + 1)))
{
state.MarkImpossible(relatedCell, state[cell].Value + 1);
}
}
}
}
return(null);
}
/// <summary>Override; see base.</summary>
public override sealed ConstraintResult Process(SolverState state)
{
for (var cellIx = 0; cellIx < (state.LastPlacedCell != null ? 1 : AffectedCells != null ? AffectedCells.Length : state.GridSize); cellIx++)
{
var cell = state.LastPlacedCell ?? (AffectedCells != null ? AffectedCells[cellIx] : cellIx);
if (state[cell] == null || (AffectedValues != null && !AffectedValues.Contains(state[cell].Value)))
{
continue;
}
foreach (var relatedCell in getRelatedCells(cell))
{
if (EnforcedCells == null || EnforcedCells.Contains(relatedCell) || EnforcedCells.Contains(cell))
{
state.MarkImpossible(relatedCell, state[cell].Value);
}
}
}
return(null);
}
/// <summary>
/// Constructor.</summary>
/// <param name="gridWidth">
/// See <see cref="GridWidth"/>.</param>
/// <param name="gridHeight">
/// See <see cref="GridHeight"/>.</param>
/// <param name="includeDiagonals">
/// See <see cref="IncludeDiagonals"/>.</param>
/// <param name="affectedValues">
/// See <see cref="AffectedValues"/>.</param>
/// <param name="enforcedCells">
/// See <see cref="EnforcedCells"/>. If <c>null</c>, the default is to enforce the entire grid.</param>
public NoConsecutiveConstraint(int gridWidth, int gridHeight, bool includeDiagonals, int[] affectedValues = null, IEnumerable <int> enforcedCells = null, bool enforcedCellsOnly = false)
: base(null)
{
GridWidth = gridWidth;
GridHeight = gridHeight;
IncludeDiagonals = includeDiagonals;
AffectedValues = affectedValues;
EnforcedCells = enforcedCells?.ToArray();
EnforcedCellsOnly = enforcedCellsOnly;
AffectedCells = EnforcedCells == null ? null : EnforcedCellsOnly ? EnforcedCells : EnforcedCells.SelectMany(cell => AdjacentCells(cell, gridWidth, gridHeight, includeDiagonals)).Distinct().ToArray();
}
