public SolverNode Init(Puzzle puzzle, ISolverQueue queue)
{
var root = CreateRoot(puzzle);
queue.Enqueue(root);
return(root);
}
public override bool Evaluate(
SolverState state,
ISolverQueue queue,
ISolverPool pool,
ISolverPool solutionPool,
SolverNode node)
{
if (node.HasChildren)
{
throw new InvalidOperationException();
}
node.Status = SolverNodeStatus.Evaluting;
var toEnqueue = new List <SolverNode>(); // TODO: Could be reused
var toPool = new List <SolverNode>(); // TODO: Could be reused
var solution = false;
foreach (var move in node.MoveMap.TruePositions())
{
foreach (var dir in VectorInt2.Directions)
{
var p = move;
var pp = p + dir;
var ppp = pp + dir;
if (node.CrateMap[pp] && // crate to push
state.StaticMaps.FloorMap[ppp] && !node.CrateMap[ppp] && // into free space?
!state.StaticMaps.DeadMap[ppp]) // Valid Push
{
EvaluateValidPush(state, pool, solutionPool, node, pp, ppp, p, dir, toEnqueue, toPool, ref solution);
}
}
}
if (solution)
{
node.Status = SolverNodeStatus.SolutionPath;
}
else if (node.HasChildren)
{
node.Status = SolverNodeStatus.Evaluted;
state.Statistics.TotalDead += node.CheckDead(); // Children may be evaluated as dead already
}
else
{
node.Status = SolverNodeStatus.Dead;
state.Statistics.TotalDead++;
if (node.Parent != null)
{
state.Statistics.TotalDead += node.Parent.CheckDead();
}
}
queue.Enqueue(toEnqueue);
pool.Add(toPool);
return(solution);
}
public bool Evaluate(SolverState state, ISolverQueue queue, ISolverPool myPool,
ISolverPool 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
state.StaticMaps.FloorMap[pp] && !node.CrateMap[p] &&
!CheckDeadReverse(state, pp))
{
EvaluateValidPull(state, myPool, solutionPool, node, pc, p, pp, toEnqueue, ref solution);
}
}
}
if (solution)
{
node.Status = SolverNodeStatus.SolutionPath;
}
else if (node.HasChildren)
{
node.Status = SolverNodeStatus.Evaluted;
state.Statistics.TotalDead += node.CheckDead(); // Children may be evaluated as dead already
}
else
{
node.Status = SolverNodeStatus.Dead;
state.Statistics.TotalDead++;
if (node.Parent != null)
{
state.Statistics.TotalDead += node.Parent.CheckDead();
}
}
queue.Enqueue(toEnqueue);
myPool.Add(toEnqueue);
return(solution);
}
public SolverNode Init(Puzzle puzzle, ISolverQueue queue)
{
var solution = puzzle.ToMap(puzzle.Definition.AllGoals); // START with a solution
var walls = puzzle.ToMap(puzzle.Definition.Wall);
// The is only one start, but MANY end soutions. Hence a single root is not a valid representation
// We use a placeholder node (not an actualy move to hold solutions)
var root = new SolverNodeRootReverse(
new VectorInt2(), new VectorInt2(),
puzzle.ToMap(puzzle.Definition.AllGoals),
new Bitmap(puzzle.Width, puzzle.Height),
this,
puzzle
);
foreach (var crateBefore in solution.TruePositions())
{
foreach (var dir in VectorInt2.Directions)
{
// ss
var posPlayer = crateBefore + dir;
var posPlayerAfter = posPlayer + dir;
var crateAfter = crateBefore + dir;
// Remember: In reverse mode goals are crates, and crate may be floor
if ((puzzle[posPlayer] == puzzle.Definition.Floor ||
puzzle[posPlayer] == puzzle.Definition.Player ||
puzzle[posPlayer] == puzzle.Definition.Crate)
&&
(puzzle[posPlayerAfter] == puzzle.Definition.Floor ||
puzzle[posPlayerAfter] == puzzle.Definition.Player ||
puzzle[posPlayer] == puzzle.Definition.Crate))
{
// var crate = new Bitmap(solution);
// crate[crateBefore] = false;
// crate[crateAfter] = true;
// var move = FloodFill.Fill(walls.BitwiseOR(crate), posPlayerAfter);
// var node = nodeFactory.CreateInstance(posPlayer, posPlayerAfter - posPlayer, crate, move);
var node = nodeFactory.CreateFromPull(root, solution, walls, crateBefore, crateAfter, posPlayerAfter);
if (node.MoveMap.Count > 0)
{
root.Add(node);
queue.Enqueue(node);
}
}
}
}
return(root);
}
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;
}
public SolverNode Init(Puzzle puzzle, ISolverQueue queue)
{
var solution = puzzle.ToMap(puzzle.Definition.AllGoals); // START with a solution
var walls = puzzle.ToMap(puzzle.Definition.Wall);
// The is only one start, but MANY end soutions. Hence a single root is not a valid representation
// We use a placeholder node (not an actualy move to hold solutions)
var root = new SingleThreadedReverseSolver.SyntheticReverseNode()
{
CrateMap = puzzle.ToMap(puzzle.Definition.AllGoals),
MoveMap = new Bitmap(puzzle.Width, puzzle.Height)
};
foreach (var crateBefore in solution.TruePositions())
{
foreach (var dir in VectorInt2.Directions)
{
// ss
var posPlayer = crateBefore + dir;
var posPlayerAfter = posPlayer + dir;
var crateAfter = crateBefore + dir;
// Remember: In reverse mode goals are crates, and crate may be floor
if ((puzzle[posPlayer] == puzzle.Definition.Floor
|| puzzle[posPlayer] == puzzle.Definition.Player
|| puzzle[posPlayer] == puzzle.Definition.Crate
)
&&
(puzzle[posPlayerAfter] == puzzle.Definition.Floor
|| puzzle[posPlayerAfter] == puzzle.Definition.Player
|| puzzle[posPlayer] == puzzle.Definition.Crate
)
)
{
var crate = new Bitmap(solution);
crate[crateBefore] = false;
crate[crateAfter] = true;
var node = new SolverNode()
{
CrateBefore = crateBefore,
CrateAfter = crateAfter,
PlayerBefore = posPlayer,
PlayerAfter = posPlayerAfter,
CrateMap = crate,
MoveMap = FloodFill.Fill(walls.BitwiseOR(crate), posPlayerAfter)
};
if (node.MoveMap.Count > 0)
{
root.Add(node);
queue.Enqueue(node);
}
}
}
}
return root;
}
public SolverNode Init(Puzzle puzzle, ISolverQueue queue)
{
var root = SolverHelper.CreateRoot(puzzle);
queue.Enqueue(root);
return root;
}