def getHeuristic(board, heuristicHistory, Smart_score):
hash = board.hash()
if (hash in heuristicHistory):
heuristic = heuristicHistory[hash]
else:
#print('Board :', board.getBoard())
our_position, our_unit_nb = board.getBiggestPosition()
opponents_unit_nb = board.getOpponentUnitsNumberSum()
humans_pos = np.array(list(board.humansPos.keys()), dtype=(int, int))
humans_nb = np.array(list(board.humansPos.values()), dtype=int)
enemy_pos = np.array(board.getOpponentCurrentPositions(),
dtype=(int, int))
enemy_nb = np.array(board.getOpponentUnitsNumber(), dtype=int)
#filter human positions where we are not at least equal to them in number
humans_pos = humans_pos[humans_nb <= our_unit_nb]
humans_nb = humans_nb[humans_nb <= our_unit_nb]
#filter enemy positions where we are 1.5x more so we are sure to win
enemy_pos = enemy_pos[enemy_nb * 1.5 <= our_unit_nb]
enemy_nb = enemy_nb[enemy_nb * 1.5 <= our_unit_nb]
if len(humans_pos) > 0:
positions_tile = np.tile(
our_position, (len(humans_pos), 1)
) # create an array of our_position, reapeated human_pos times
#compute the distance with humans (and our position)
max_dist = np.max(np.abs(positions_tile - humans_pos), axis=1)
max_heuristic_humans = humans_nb / (max_dist + 1)
else:
max_heuristic_humans = [0]
if len(enemy_pos) > 0:
positions_tile = np.tile(our_position, (len(enemy_pos), 1))
#compute the distance with ennemy
max_dist = np.max(np.abs(positions_tile - enemy_pos), axis=1)
max_heuristic_enemy = enemy_nb / (max_dist + 1)
else:
max_heuristic_enemy = [0]
#our heuristic is human heuristic + enemy heuristic + our current unit_nb - enemy unit number
#print(board.getBiggestPosition())
#print("max(max_heuristic_humans)", max(max_heuristic_humans),
# "max_heuristic_enemy", max_heuristic_enemy,
# "max(max_heuristic_enemy)" , max(max_heuristic_enemy))
heuristic = max(max_heuristic_humans) + max(
max_heuristic_enemy) + our_unit_nb - opponents_unit_nb
#print(heuristic)
heuristicHistory[hash] = heuristic
return heuristic
def getSmarterHeuristic(board, heuristicHistory, Smart_score):
"""
Heuristic function
"""
hash = board.hash()
if (hash in heuristicHistory):
heuristic = heuristicHistory[hash]
else:
score = 0
# Store essential information
our_position, our_unit_nb = board.getBiggestPosition()
units_nb = board.getCurrentUnitsNumber()
total_units_nb = board.getCurrentUnitsNumberSum()
our_pos = board.getCurrentPositions()
humans_pos = np.array(list(board.humansPos.keys()), dtype=(int, int))
humans_nb = np.array(list(board.humansPos.values()), dtype=int)
total_humans_nb = np.sum(humans_nb)
enemy_pos = np.array(board.getOpponentCurrentPositions(),
dtype=(int, int))
enemy_nb = np.array(board.getOpponentUnitsNumber(), dtype=int)
opponents_unit_nb = board.getOpponentUnitsNumberSum()
distanceEnemies = [
np.max(np.abs(np.subtract(list(enemy), our_position)))
for enemy in enemy_pos
]
# distanceHumans = [np.max(np.abs(np.subtract(list(human_loc), our_position)))
"""
# Consider the case where there is no human left
if total_humans_nb == 0:
for dist, enemy_unit in zip(distanceEnemies, enemy_nb):
if (enemy_unit < 1.5 * total_units_nb): score += 10000 / ((dist+1)*(enemy_unit))
else:
score -= 10 /(dist+1)
heuristic = score
heuristicHistory[hash] = heuristic
# consider distance of ennemy with our units --> if = 1, bad.
else:
"""
# Consider eatable humans and proximity - does not deal with split yet
potential_units = total_units_nb
for humans_loc, human_unit in zip(humans_pos, humans_nb):
dist = np.max(np.abs(np.subtract(humans_loc, our_position)))
if (human_unit > potential_units): p = 0
elif (total_units_nb >= human_unit): p = 1
else: p = 2 / 3
distEH = min([
np.max(np.abs(np.subtract(list(enemy), humans_loc)))
for enemy in enemy_pos
])
if ((distEH) / (dist + 1) <= 1 / 4): q = 0.5
elif (0.9 < (distEH + 1) / (dist + 1)
and (distEH + 1) / (dist + 1) < 1.2):
q = 1.2
else:
q = 1
score += p * q * human_unit / (dist + 1)
potential_units += human_unit
# Consider ennemies
for dist, enemy_unit in zip(distanceEnemies, enemy_nb):
if (enemy_unit >= 1.5 * total_units_nb):
score -= (enemy_unit - total_units_nb) / (dist + 1) # avoid
elif (total_units_nb > 1.5 * enemy_unit):
score += (total_units_nb - enemy_unit) / (dist + 1
) # go towards
else:
score += 1 / (dist + 1) # if no humans left, go attack
# consider distance of ennemy with our units --> if = 1, bad.
# Compute heuristic
greedy = 4 # how greedy we want our bot to be, meaning how much does it values the units gained within tree search
# score is weighted by 1, Smart_score by 3.5.
heuristic = score + Smart_score - greedy * opponents_unit_nb + greedy * total_units_nb
heuristicHistory[hash] = heuristic
return heuristic