// Get all the possible values from key and filter them using the filter
public Keys <TKey> Process(IPuzzleEngine <TKey> engine)
{
Keys <TKey> keysChanged = engine.Puzzle.Space.Eliminate(Keys, Filter);
engine.Add(new JobSearch <TKey>("Filter", keysChanged));
return(keysChanged);
}
/// <summary>
/// This elimination works out if there is an intersection between mutually exclusive sets
/// that contains any values that are in the intersection and not in the outersection of one set.
/// If this is so, (and both sets must contain that value) then the values can be eliminated from
/// the other set also. Only need - in addition to above, used when intersecting points > 1.
/// </summary>
static public int CreateCompleteIntersectActions(Keys <TKey> group1, Keys <TKey> group2, IPuzzleEngine <TKey> engine)
{
int added = 0;
Keys <TKey> keysIntersection = new Keys <TKey>(group1);
keysIntersection.IntersectWith(group2);
if (keysIntersection.Count > 1)
{
Keys <TKey> keysOuter1 = new Keys <TKey>(group1);
keysOuter1.ExceptWith(keysIntersection);
Keys <TKey> keysOuter2 = new Keys <TKey>(group2);
keysOuter2.ExceptWith(keysIntersection);
IPossible valuesIntersect = engine.Puzzle.Space.AllValuesAt(keysIntersection);
IPossible valuesOuter1 = engine.Puzzle.Space.AllValuesAt(keysOuter1);
IPossible valuesOuter2 = engine.Puzzle.Space.AllValuesAt(keysOuter2);
Possible filter2 = new Possible(valuesIntersect);
filter2.FilterOut(valuesOuter1);
if (filter2.Count > 0)
{
engine.Add(new JobFilter <TKey>("Intersection", keysOuter2, filter2));
added++;
}
// find each value that is present in the intersection (and not in outer1)
// and eliminate it from the set2
// find each value that is present in the intersection (and not in outer)
// and eliminate it from the set1
Possible filter1 = new Possible(valuesIntersect);
filter1.FilterOut(valuesOuter2);
if (filter1.Count > 0)
{
engine.Add(new JobFilter <TKey>("Intersection", keysOuter1, filter1));
added++;
}
}
return(added);
}
static public int CreateCompleteSetActions(Keys <TKey> group1, Keys <TKey> group2, IPuzzleEngine <TKey> engine)
{
int added = 0;
// This works out possibleInner (go to space and union all values);
IPossible possibleInner = engine.Puzzle.Space.AllValuesAt(group1);
// If the values in the set are equal to the
// available spaces in the solution then we consider this set
// complete and can eliminate it from the rest of the group
// (e.g. 1 value in 1 cell, or 8 values in 8 cells)
if (possibleInner.Values.Count == group1.Count())
{
// This finds the working group of locations (excludes the changed set)
Keys <TKey> workingGroup = new Keys <TKey>(group2);
workingGroup.ExceptWith(group1);
IJob <TKey> job = new JobFilter <TKey>("CompleteSet", workingGroup, possibleInner);
engine.Add(job);
added++;
// Get all the possible values from key and filter them out of the group
}
return(added);
}
int CreateXWingProcesses(IList <IList <IKeyedRegions <TKey> > > xwings, IPuzzleEngine <TKey> engine)
{
int added = 0;
foreach (IList <IKeyedRegions <TKey> > xwing in xwings)
{
foreach (Keys <TKey> keys1 in xwing[0].OtherKeys)
{
foreach (TKey key1 in keys1)
{
foreach (Keys <TKey> keys2 in xwing[1].OtherKeys)
{
foreach (TKey key2 in keys2)
{
Keys <TKey> keysA = new Keys <TKey>()
{
key1, key2
};
IConstraints <TKey> y = engine.Puzzle.Constraints.FindOtherConstraintsContainingAllKeys(
keysA,
new HashSet <ConstraintType>()
{
this.Type
},
new Constraints <TKey>()
{
this
});
foreach (IConstraint <TKey> constraint in y)
{
if (xwing[0].Value.IsSubsetOf(keysA.ReducedSetValues(constraint.Keys, engine.Puzzle.Space)))
{
Keys <TKey> keys1R = new Keys <TKey>(keys1);
keys1R.Remove(key1);
if (keys1R.Count > 0)
{
//SpaceAdapter<int>.ToFile(engine.Puzzle.Space.ToString(), 0);
JobFilter <TKey> action1 =
new JobFilter <TKey>("XWing", keys1R, xwing[0].Value);
engine.Add(action1);
added++;
}
Keys <TKey> keys2R = new Keys <TKey>(keys2);
keys2R.Remove(key2);
if (keys2R.Count > 0)
{
//SpaceAdapter<int>.ToFile(engine.Puzzle.Space.ToString(), 2);
JobFilter <TKey> action2 =
new JobFilter <TKey>("XWing", keys2R, xwing[1].Value);
engine.Add(action2);
added++;
//SpaceAdapter<int>.ToFile(engine.Puzzle.Space.ToString(), 3);
}
}
}
}
}
}
}
}
return(added);
}