class Game:
''' The Game encapsulates all of the information about a particular round of
tunneler. It knows the state of the grid, the players, which particular timestep
we are on, etc. '''
def __init__(self, playerHandlers, numRows, numCols, server):
self.timestep = 0
self.changes = ""
self.handlersReady = []
self.commands = []
self.bullets = []
self.nextBulletID = 3
self.server = server
self.gameAlreadyOver = False
self.grid = Grid(numRows, numCols)
aBaseRow, aBaseCol = self.grid.createRandomBasePosition()
bBaseRow, bBaseCol = self.grid.createRandomBasePosition()
self.grid.addBase(aBaseRow, aBaseCol, A_BASE_UNIT)
self.grid.addBase(bBaseRow, bBaseCol, B_BASE_UNIT)
self.playerHandlers = playerHandlers
self.createPlayers(aBaseRow, aBaseCol, bBaseRow, bBaseCol)
self.sendInitialGameConditions()
def createPlayers(self, aBaseRow, aBaseCol, bBaseRow, bBaseCol):
'''
The players start off in the middle of their respective bases. This
method creates the objects used to model them.
'''
i = 1
while i < 3:
playerRow = 0
playerCol = 0
if i == 1:
playerRow = aBaseRow + int(math.ceil(BASE_SIZE / 2))
playerCol = aBaseCol + int(math.ceil(BASE_SIZE / 2))
else:
playerRow = bBaseRow + int(math.ceil(BASE_SIZE / 2))
playerCol = bBaseCol + int(math.ceil(BASE_SIZE / 2))
self.playerHandlers[i-1].player = Player(i, playerRow, playerCol, self)
self.playerHandlers[i-1].game = self
i+= 1
def sendInitialGameConditions(self):
'''
When both clients have connected and are ready to go, the server sends the initial data that
each handler requires to create the initial gamestate. They are:
Game start code - Indicates to the client that the game is starting
Player id - These have been assigned by the server, so the client is just told if it's id 1 or id 2
numRows, numCols - The size of the grid
Base Coordinates - The coordinates of the top left corners of the bases
'''
print "Send init conditions"
for playerHandler in self.playerHandlers:
playerHandler.sendMessage("%d.%d.%d.%d.%d.%d.%d.%d;" %(GAME_START_CODE, playerHandler.player.id, self.grid.numRows, self.grid.numCols, self.grid.aBaseRow, self.grid.aBaseCol, self.grid.bBaseRow, self.grid.bBaseCol))
def addChange(self, change):
if change != "":
self.changes += change
def terminateChangesForCurrentTimestep(self):
'''
Simply adds the timestep to the change string and the terminating semi-colon.
'''
self.changes += "%d;" % self.timestep;
print self.changes
def executeCommand(self, command):
'''
Takes a command object (which was parsed and set up by the playerHandlers),
and executes it.
'''
player = ""
handler = ""
for h in self.playerHandlers:
if h.player.id == command.id:
player = h.player
handler = h
if command.move != NO_CHANGE:
change = player.move(command.move)
if change:
self.addChange(change)
if command.shoot != NO_CHANGE:
change = player.shoot()
if change:
self.addChange(change)
def playerAt(self, row, col):
'''
Returns the the player at a particular row and col if there is player there,
false if no player is at that location.
'''
result = False
for ph in self.playerHandlers:
if ph.player.row == row and ph.player.col == col:
result = ph.player
break
return result
def bulletAt(self, row, col):
'''
Returns the id of the bullet at a particular row and col if there is player there,
false if no bullet is at that location.
'''
result = False
for bullet in self.bullets:
if bullet.row == row and bullet == col:
result = bullet.id
break
return result
def spawnBullet(self, row, col, direction):
'''
Spawns a new bullet in the grid, assigning it the next available bullet id.
If the bullet is spawned on dirt, or another player, it is not actually created,
the dirt or the player is simply damaged.
'''
change = ""
if self.grid.coordsInGrid(row, col):
playerHit = self.playerAt(row, col)
if self.grid.objectIsDirt(row, col):
change = self.grid.damageDirt(row, col, BULLET_DIRT_DAMAGE)
elif playerHit:
change = playerHit.loseHealth(BULLET_PLAYER_DAMAGE)
else:
self.bullets.append(Bullet(self.nextBulletID, row, col, direction, self))
change = "%d.%d.%d.%d," %(MOBILE_SPAWN_CODE, self.nextBulletID, row, col)
self.nextBulletID += 1
return change
def destroyBullet(self, bullet):
self.bullets.remove(bullet)
return "%d.%d," % (MOBILE_DIE_CODE, bullet.id)
def addCommand(self, cmd):
'''
Adds a command from a PlayerHandler. There can only be one command per handler
per timestep.
'''
if len(self.commands) > 0 and cmd.id != self.commands[0].id or len(self.commands) == 0:
self.commands.append(cmd)
if len(self.commands) == 2:
self.nextTimestep()
self.commands = []
def nextTimestep(self):
'''
This is where the magic happens. All of the commands are executed, any bullets that exist are moved
along, and the players either lose or gain energy depending where they are on the grid. All of
these changes are documented, and sent across the network to each of hte clients.
'''
for cmd in self.commands:
self.executeCommand(cmd)
for bullet in self.bullets:
# Bullets move twice per timestep
firstChange = bullet.keepMoving()
self.addChange(firstChange)
if not re.search("%d.%d" % (MOBILE_DIE_CODE, bullet.id), firstChange):
# The bullet should start off 1 unit away from the player when it's firt created
if not bullet.justSpawned:
self.addChange(bullet.keepMoving())
else:
bullet.justSpawned = False
for ph in self.playerHandlers:
self.addChange(ph.player.passTimestep())
self.terminateChangesForCurrentTimestep()
for playerHandler in self.playerHandlers:
playerHandler.commitChanges(self.changes)
self.changes = ""
self.timestep += 1
def gameOver(self, playerWhoLost):
'''
Tells the server and the clients that the game has ended.
'''
if not self.gameAlreadyOver:
self.addChange("%d.%d," % (GAME_OVER_CODE, playerWhoLost.id))
self.terminateChangesForCurrentTimestep()
for playerHandler in self.playerHandlers:
playerHandler.commitChanges(self.changes)
self.server.gameOver()
self.gameAlreadyOver = True
