private SolverNode Assemble(
SolverNode parent,
StagingSolverNode flat,
ImmutableDictionary <int, StagingSolverNode> all,
ImmutableDictionary <int, ImmutableArray <StagingSolverNode> > parents)
{
var n = new SolverNode(parent,
new VectorInt2(flat.PlayerBeforeX, flat.PlayerBeforeY),
new VectorInt2(flat.PushX, flat.PushY),
flat.CrateMap,
flat.MoveMap,
flat.SolverNodeId
);
n.Status = (SolverNodeStatus)flat.Status;
if (parents.TryGetValue(flat.SolverNodeId, out var kids))
{
foreach (var kid in kids)
{
n.Add(Assemble(n, kid, all, parents));
}
}
return(n);
}
public bool Evaluate(SolverCommandResult state, ISolverQueue queue, ISolverNodeLookup myPool, ISolverNodeLookup solutionPool, SolverNode node)
{
if (node.HasChildren) throw new InvalidOperationException();
node.Status = SolverNodeStatus.Evaluting;
var solution = false;
var toEnqueue = new List<SolverNode>();
foreach (var move in node.MoveMap.TruePositions())
{
foreach (var dir in VectorInt2.Directions)
{
var p = move;
var pc = p + dir;
var pp = p - dir;
if (node.CrateMap[pc]) // crate to push
{
if (state.StaticMaps.FloorMap[pp] && !node.CrateMap[p])
{
if (!CheckDeadReverse(state, pp))
{
var newKid = new SolverNode
{
PlayerBefore = p,
PlayerAfter = pp,
CrateBefore = pc,
CrateAfter = p,
CrateMap = new Bitmap(node.CrateMap),
Evaluator = this,
};
newKid.CrateMap[pc] = false;
newKid.CrateMap[p] = true;
var boundry = state.StaticMaps.WallMap.BitwiseOR(newKid.CrateMap);
newKid.MoveMap = FloodFill.Fill(boundry, pp);
newKid.Goals = newKid.CrateMap.BitwiseAND(state.StaticMaps.GoalMap).Count();
// Optimisation: PreCalc hash
newKid.EnsureHash();
// Cycle Check: Does this node exist already?
var dup = myPool.FindMatch(newKid);
if (dup != null)
{
// NOTE: newKid is NOT added as a ChildNode (which means less memory usage)
// Duplicate
newKid.Status = SolverNodeStatus.Duplicate;
state.Statistics.Duplicates++;
if (IsDebugMode)
{
node.AddDuplicate(dup);
}
}
else
{
SolverNode match = null;
if (solutionPool != null) match = solutionPool.FindMatch(newKid);
if (match != null)
{
// Add to tree / itterator
node.Add(newKid);
// Solution
if (state.SolutionsWithReverse == null) state.SolutionsWithReverse = new List<SolutionChain>();
var pair = new SolutionChain()
{
ForwardNode = match,
ReverseNode = newKid,
FoundUsing = this
};
state.SolutionsWithReverse.Add(pair);
solution = true;
state.Command.Debug.Raise(this, SolverDebug.Solution, pair);
foreach (var n in newKid.PathToRoot().Union(match.PathToRoot()))
{
n.Status = SolverNodeStatus.SolutionPath;
}
newKid.Status = SolverNodeStatus.Solution;
match.Status = SolverNodeStatus.Solution;
if (state.Command.ExitConditions.StopOnSolution)
{
return true;
}
}
else
{
// Add to tree / itterator
node.Add(newKid);
if (DeadMapAnalysis.DynamicCheck(state.StaticMaps, node))
{
newKid.Status = SolverNodeStatus.Dead;
}
else
{
toEnqueue.Add(newKid);
if (newKid.CrateMap.BitwiseAND(state.StaticMaps.CrateStart).Equals(newKid.CrateMap))
{
// Possible Solution: Did we start in a valid position
if (CheckValidSolutions(state, newKid))
{
state.Solutions.Add(newKid);
state.Command.Debug.Raise(this, SolverDebug.Solution, newKid);
solution = true;
foreach (var n in newKid.PathToRoot())
{
n.Status = SolverNodeStatus.SolutionPath;
}
newKid.Status = SolverNodeStatus.Solution;
}
else
{
newKid.Status = SolverNodeStatus.InvalidSolution;
}
}
}
}
}
}
}
}
}
}
node.Status = node.HasChildren ? SolverNodeStatus.Evaluted : SolverNodeStatus.Dead;
if (node.Status == SolverNodeStatus.Dead && node.Parent != null)
{
var p = (SolverNode)node.Parent;
p.CheckDead();
}
queue.Enqueue(toEnqueue);
myPool.Add(toEnqueue);
return solution;
}