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Destroyed ships will not be revived when bombed #66

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Destroyed ships will not be revived when bombed #66

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65 changes: 42 additions & 23 deletions games/game_engines/battleships_engine.py
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Original file line number Diff line number Diff line change
Expand Up @@ -53,7 +53,8 @@ def play_game():

# ask both players where they want to bomb, and update the list of bombings so far
bomb = ask_for_bombs(bomb)



# now we create and run the quantum programs that implement this on the grid for each player
qc = []
for player in range(2):
Expand All @@ -67,16 +68,21 @@ def play_game():

# add the bombs (of the opposing player)
for position in range(5):
# add as many bombs as have been placed at this position
for _ in range(bomb[(player+1)%2][position]):
# the effectiveness of the bomb
# (which means the quantum operation we apply)
# depends on which ship it is
for ship in [0,1,2]:
if (position == shipPos[player][ship]):
frac = 1/(ship+1)
# add this fraction of a NOT to the QASM
qc[player].u3(frac * math.pi, 0.0, 0.0, q[position])
# Check if ship was not already destroyed at this position (bomb array at position was set to -1)
if bomb[(player+1)%2][position] != -1:
#If ship was not already destroyed add as many bombs as have been placed at this position
for _ in range(bomb[(player+1)%2][position]):
# the effectiveness of the bomb
# (which means the quantum operation we apply)
# depends on which ship it is
for ship in [0,1,2]:
if (position == shipPos[player][ship]):
frac = 1/(ship+1)
# add this fraction of a NOT to the QASM
qc[player].u3(frac * math.pi, 0.0, 0.0, q[position])
else:
#If ship was already destroyed apply a flip to the quantum state
qc[player].u3(math.pi, 0.0, 0.0, q[position])

# Finally, measure them
for position in range(5):
Expand All @@ -91,15 +97,18 @@ def play_game():
# and extract data
for player in range(2):
grid[player] = job.result().get_counts(qc[player])
print(grid)

game = display_grid(grid, shipPos, shots)

# notice bomb array is updated within the display_grid function - future bombs will not affect allready destroyed ships
game, bomb = display_grid(grid, shipPos, bomb, shots )


def ask_for_device ():

d = input("Do you want to play on the real device? (y/n)\n").upper()
if (d=="Y"):
device = IBMQ.get_backend('ibmq_5_tenerife') # if real, we use ibmqx4
provider = IBMQ.get_provider()
device = provider.get_backend('ibmq_essex')
#device = IBMQ.get_backend('ibmq_5_tenerife') # if real, we use ibmqx4
else:
device = Aer.get_backend('qasm_simulator') # otherwise, we use a simulator

Expand Down Expand Up @@ -150,7 +159,7 @@ def ask_for_ships ():
return shipPos


def ask_for_bombs ( bomb ):
def ask_for_bombs (bomb):

input("> Press Enter to place some bombs...\n")

Expand All @@ -170,9 +179,14 @@ def ask_for_bombs ( bomb ):
if position.isdigit(): # valid answers have to be integers
position = int(position)
if position in range(5): # they need to be between 0 and 5, and not used for another ship of the same player
bomb[player][position] = bomb[player][position] + 1
choosing = False
print ("\n")
#Check if bombed ship was not allready destroyed and add bombs
if bomb[player][position] != -1:
bomb[player][position] = bomb[player][position] + 1
choosing = False
print ("\n")
else:
#if the ship was allready destroyed don't add more bombs
choosing = False
else:
print("\nThat's not a valid position. Try again.\n")
else:
Expand All @@ -181,7 +195,8 @@ def ask_for_bombs ( bomb ):
return bomb


def display_grid ( grid, shipPos, shots ):
#bomb array is added as an argument so bombs array could be updated such that future bombs will not affect allready destroyed ships
def display_grid ( grid, shipPos, bomb, shots):

# since this function has been called, the game must still be on
game = True
Expand Down Expand Up @@ -214,10 +229,13 @@ def display_grid ( grid, shipPos, shots ):
if ( damage[player][position] > 0.1 ):
if (damage[player][position]>0.9):
display[position] = "100%"
# if ship is destroyed - disable opponent future bombs effect of this position
bomb[(player+1)%2][position] = -1
else:
display[position] = str(int( 100*damage[player][position] )) + "% "
#print(position,damage[player][position])




print("Here is the percentage damage for ships that have been bombed.\n")
print(display[ 4 ] + " " + display[ 0 ])
print(r' |\ /|')
Expand All @@ -232,6 +250,7 @@ def display_grid ( grid, shipPos, shots ):
print("Ships with 95% damage or more have been destroyed\n")

print("\n")


# if a player has all their ships destroyed, the game is over
# ideally this would mean 100% damage, but we go for 95% because of noise again
Expand All @@ -245,7 +264,7 @@ def display_grid ( grid, shipPos, shots ):
print("")


return game
return game , bomb



Expand Down