chrispenner / astar-monad Goto Github PK
View Code? Open in Web Editor NEWA smart A* search monad transformer which supports backtracking user-state!
License: BSD 3-Clause "New" or "Revised" License
A smart A* search monad transformer which supports backtracking user-state!
License: BSD 3-Clause "New" or "Revised" License
The README states
Remember that A* heuristics should always be pessimistic (e.g. can over-estimate cost, but shouldn't UNDER estimate)
It should be the other way around. Or are you using a modified version of A* that has this property?
The if
statement in findPoint
in the 2D location example seems redundant
-- I could return the moves we took,
-- but our State is automatically returned when we run AStar
when (c == gl) $ done ()
-- We have more work to do, we should update the cost estimate and continue
updateCost $ distanceTo gl c
if c == gl
then done ()
else updateCost $ distanceTo gl c
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