class GUI():
def __init__(self, screen_rect, bg_img):
# Setup Screen and background image
self.screen = pygame.display.set_mode((screen_rect.w, screen_rect.h))
self.screen_rect = screen_rect
self.bg_img = bg_img.convert()
# Init starfield (layer above background, slowly scrolls on loop)
self.star_field = \
objects.object_types["starField"](
speed = -0.3,
surface = self.screen)
# Init player ship, add it to shipGroup
self.player_ship = objects.object_types["ship"](position=(50, 50),
activate=True)
ship.Ship.shipGroup.add(self.player_ship)
# Init the alien infested asteroid, add to infestedGroup
self.infested_asteroid = objects.object_types["infested"](
position=(self.screen_rect.w - 150, 200))
infested.Infested.infestedGroup.add(self.infested_asteroid)
# Init space station, add to spaceStation group
self.space_station = objects.object_types["spaceStation"](
position=(75, self.screen_rect.h / 2))
spaceStation.SpaceStation.spaceStationGroup.add(self.space_station)
# Init scorekeeping, add to score group
self.score = objects.object_types["score"](
position=(self.screen_rect.w, 0),
time=time.time(),
spaceStation=self.space_station)
score.Score.scoreGroup.add(self.score)
# For the graph section
self.paths = None
self.graph_timer = Timer(150 / 1000, self.graph_update)
# TODO: remove this demo feature
self.OPTIONS = 0
def p1_button(self, e, down):
'''
Handles user input, allowing player_ship to be piloted
Args:
event e, a pygame event
down, a boolean representing key event type (down==True)
'''
if e == K_RIGHT: \
self.player_ship.k_right = down*self.player_ship.turn_speed
elif e == K_LEFT: \
self.player_ship.k_left = down*self.player_ship.turn_speed
elif e == K_UP: \
self.player_ship.k_up = down*self.player_ship.acceleration
elif e == K_DOWN: \
self.player_ship.k_down = down*self.player_ship.acceleration
elif e == K_SPACE and down:
self.player_ship.fire_missile()
elif e == K_TAB and down:
self.OPTIONS = (self.OPTIONS + 1) % 4
print(self.OPTIONS)
def asteroid_spawn(self):
'''
Generates an asteroid offscreen right which will travel towards
spacestation.
Consecutive asteroids will have semi-uniform motion, defined by
the speed and direction. Asteroid spawn positions will be
divided into rough 'sections' to help create a uniform asteroid field.
'''
# Divide the screen into rough sections (1.25 asteroid height)
spacing_height = asteroid.Asteroid.sprite.get_rect().h * 1.25
# Determine how many integer sections fit on screen
spacing_number = int(self.screen_rect.h / spacing_height)
# The second term positions the asteroid offscreen by some amount
x = self.screen_rect.w + random.randrange(10, 50)
# First term offsets the spacing so asteroids do not spawn
# offscreen in the vertical axis. Second term determines
# which 'section' to spawn asteroid in.
y = 0.5 * spacing_height + \
spacing_height * random.randint(0,spacing_number)
# Field movement properties
speed = random.triangular(0.5, 3, 2)
direction = random.uniform(170, 190)
# Init asteroid object, add it to asteroid group
new_asteroid = objects.object_types["asteroid"](position=(x, y),
speed=speed,
direction=direction)
asteroid.Asteroid.asteroidGroup.add(new_asteroid)
def alien_spawn(self, QTY):
'''
Adds an integer QTY potential aliens to the infested
asteroid 'aliens' attribute. This quantity will dictate
the amount of aliens which can spawn from the alien_hop
method. (I call it 'spawn pool')
'''
self.infested_asteroid.aliens += QTY
def alien_hop(self):
'''
Handles creation of new aliens, movement of existing aliens,
and drawing of teleport beams for successful hops.
'''
# Only create aliens if there is a path
if not self.paths is None:
# Send an alien along each path
for p in self.paths:
if self.infested_asteroid.aliens != 0:
new_alien = objects.object_types["alien"](
asteroid=self.infested_asteroid, # Start at source
path=p[1:]) #No need to include source in path
alien.Alien.alienGroup.add(new_alien)
self.infested_asteroid.aliens -= 1 # Decrement 'spawn pool'
self.paths = None
# Only move if the spacestation is alive
if self.space_station.alive():
target = self.space_station
for al in alien.Alien.alienGroup:
hop = None
# Alien movement
hop = al.path_hop(target)
# Optional alien path drawing
if self.OPTIONS == 1 and not al.path is None:
self.alien_path_beams(al)
# If hop successful, two nodes were returned, draw the beam
if not hop is None:
beam.Beam.beamGroup.add(\
objects.object_types["beam"](\
obj1 = hop[0],
obj2 = hop[1],
color = (128,255,0),
surface = self.screen))
def offscreen(self):
'''
Deactivates objects which go offscreen
'''
# Since we don't want asteroids deleting before offscreen, add padding
padding = 50
# Asteroids
for o in asteroid.Asteroid.asteroidGroup:
if o.position[0] < -padding or o.position[0] \
> self.screen_rect.w + padding or \
o.position[1] < -10 or o.position[1] \
> self.screen_rect.h+10:
o.deactivate()
# Missiles
for o in missile.Missile.missileGroup:
if o.position[0] < -padding or o.position[0] \
> self.screen_rect.w + padding or \
o.position[1] < -padding or o.position[1] > \
self.screen_rect.h+padding:
o.deactivate()
# Aliens
for o in alien.Alien.alienGroup:
if o.position[0] < -padding or o.position[0] \
> self.screen_rect.w + padding or \
o.position[1] < -padding or o.position[1] > \
self.screen_rect.h+padding:
o.deactivate()
def update(self):
'''
Called by game.py, calls the update methods of various groups/objects.
Also handles object collisions.
'''
self.star_field.update()
self.score.update(time.time())
collision.ast_mis(self.screen)
collision.ast_ast()
# Optional ship collision with asteroids
if self.OPTIONS == 2:
collision.ship_ast(self.screen)
asteroid.Asteroid.asteroidGroup.update()
ship.Ship.shipGroup.update()
missile.Missile.missileGroup.update()
self.graph_timer.update()
alien.Alien.alienGroup.update()
def draw(self):
'''
Draws the background elements and game objects.
'''
# Re-draw entire background
self.screen.blit(self.bg_img, (0, 0))
self.star_field.draw(self.screen)
self.score.draw(self.screen)
# Draw the objects
infested.Infested.infestedGroup.draw(self.screen)
asteroid.Asteroid.asteroidGroup.draw(self.screen)
ship.Ship.shipGroup.draw(self.screen)
missile.Missile.missileGroup.draw(self.screen)
spaceStation.SpaceStation.spaceStationGroup.draw(self.screen)
alien.Alien.alienGroup.draw(self.screen)
# Draw special effects
# Particles draw simple circles on update
particle.Particle.particleGroup.update()
# Beams draw simple lines on update
beam.Beam.beamGroup.update()
# Update the screen
pygame.display.flip()
def graph_update(self):
'''
Updates the graph (flow network), modifies the GUI paths attribute
to include any paths returned from the max flow algorithm.
Everytime this function is called, the graph is created from scratch,
and max flow called on this new flow network.
'''
# Reset paths
self.paths = None
# Since the graph creates new source/sink nodes, store these along
# with the graph object
g, s, t = graph.gen_flow_network(
asteroid.Asteroid.asteroidGroup.sprites(), # Nodes
self.infested_asteroid, # Source s
self.space_station, # Sink t
alien.Alien.radius) # The max teleport radius
# Optional graph edge drawing
if self.OPTIONS == 3:
self.graph_beams(g)
# Run max flow on the newly created graph object
flow = graph.max_flow(g, s, t)
if flow > 0: # There is at least 1 valid flow path
# Reconstruct flows to yield a list of path lists.
self.paths = graph.reconstruct_flows(g, s, t)
def graph_beams(self, g):
'''
Simply for demoing, draws a line for all edges in the graph object
created in graph_update using the beam class.
'''
for e in g.edges():
beam.Beam.beamGroup.add(\
objects.object_types["beam"](\
health = 1,
obj1 = e[0],
obj2 = e[1],
color = (255,255,0),
surface = self.screen))
def alien_path_beams(self, alien):
'''
Simply for demoing, draws a line for all edges in the alien's path.
Green means still viable, red means out of range.
'''
curr = alien.asteroid
for succ in alien.path[1:]:
if euclidD(succ.position, curr.position) > alien.radius:
color = (255, 153, 153)
else:
color = (102, 155, 102)
beam.Beam.beamGroup.add(\
objects.object_types["beam"](\
health = 40,
obj1 = curr,
obj2 = succ,
color = color,
surface = self.screen))
curr = succ
def test_timer(self):
timer = Timer(0.05)
self.assertFalse(timer.update())
time.sleep(0.05)
self.assertTrue(timer.update())
class Tank(entities.Entity, entities.ProjectileCollider, entities.Blocking):
def __init__(self, location, graphics, heading=Vector(1, 0)):
super().__init__()
self.graphics = graphics
self.heading = Vector(0, -1)
self.direction = Direction.NORTH
self.moving = False
self.type = type
self.maxHitPoints = 10
self.hitpoints = self.maxHitPoints
self.movementSpeed = 1
self.scorePoints = 0
self.shielded = False
self.shieldEndTime = 0
self.weapon = Weapon(self, level=1)
self.controller = None
self.controllerTimer = Timer(50)
tileBlockedFunction = lambda tile: not tile is None and tile.blocksMovement
self.movementHandler = MovementHandler(self, tileBlockedFunction)
self.setLocation(location)
self.setHeading(heading)
self.lastHitTime = None
self.lastHitVector = Vector(0, 0)
self.destroyCallback = None
self.destroyed = False
def setScorePoints(self, points):
self.scorePoints = points
def getScorePoints(self):
return self.scorePoints
def setMaxHitpoints(self, hitpoints):
self.maxHitPoints = hitpoints
self.repair()
def repair(self):
self.hitpoints = self.maxHitPoints
def setController(self, controller):
self.controller = controller
self.playerControlled = isinstance(controller,
tankcontroller.PlayerTankController)
def getController(self):
return self.controller
def isPlayerControlled(self):
return self.playerControlled
def update(self, time, timePassed):
if self.controllerTimer.update(time):
self.controller.update(time, timePassed)
if self.moving:
movementVector = self.heading.multiplyScalar(
self.movementSpeed * timePassed * 0.05).round()
self.movementHandler.moveEntity(movementVector)
self.checkIfShieldIsDone(time)
self.moving = False
pass
def render(self, screen, offset, time):
extraOffset = Vector(0, 0)
if not self.lastHitTime == None and time - self.lastHitTime > 50:
extraOffset = self.lastHitVector.multiplyScalar(-1).toUnit()
drawOffset = Vector(offset[0], offset[1])
self.graphics.render(screen,
drawOffset.add(self.location).add(extraOffset),
self.direction)
self.controller.render(screen)
def moveSingleStep(self, direction):
self.setHeading(direction)
self.movementHandler.moveEntity(direction.toUnit())
def moveInDirection(self, direction):
self.setHeading(direction)
self.moving = True
def canMoveInDirection(self, direction):
return self.movementHandler.canMove(direction)
def fire(self, time):
if self.weapon.canFire(time):
location = self.getProjectileFireLocation()
self.weapon.fire(location, self.heading, time)
def getProjectileFireLocation(self):
halfProjectileSize = Vector(2, 2)
location = self.getCenterLocation()
return location.subtract(halfProjectileSize)
# halfProjectileSize = Vector(2, 2)
# location = self.getCenterLocation()
# location = location.subtract(halfProjectileSize)
# location = location.add(self.heading.toUnit().multiplyScalar(self.size.y / 2))
# return location
def hitByProjectile(self, projectile, time):
if self.shielded:
return
self.lastHitTime = time
self.lastHitVector = projectile.directionVector
self.hitpoints -= projectile.power
if self.hitpoints <= 0:
self.destroy()
def setImage(self, image):
self.image = image
self.setSize(Vector(self.image.get_width(), self.image.get_height()))
def getHeading(self):
return self.heading
def setHeading(self, newHeading):
self.heading = newHeading
self.direction = self.getDirectionFromVector(self.heading)
self.setGraphics(self.direction)
def setGraphics(self, direction):
self.setImage(self.graphics.baseImages[direction])
self.turretImage = self.graphics.turretImages[direction]
self.turretOffset = self.graphics.turretOffsets[direction]
def getWeapon(self):
return self.weapon
def setWeapon(self, newWeapon):
self.weapon = newWeapon
def enableShield(self, duration):
self.shielded = True
self.shieldEndTime = pygame.time.get_ticks() + duration
print(f'Shield enabled for {duration} seconds')
def checkIfShieldIsDone(self, time):
if self.shielded and time >= self.shieldEndTime:
self.shielded = False
print('Shield has ran out')
def setDestroyCallback(self, callback):
self.destroyCallback = callback
def fireDestroyCallback(self):
if self.destroyCallback != None:
self.destroyCallback(self)
def getHitpoints(self):
return self.hitpoints
def destroy(self):
self.destroyed = True
self.createExplosion()
self.fireDestroyCallback()
self.markDisposable()
def createExplosion(self):
image = images.get('explosion')
entities.manager.add(
entities.effect.Effect(image, self.getCenterLocation(), 300))
def isDestroyed(self):
return self.destroyed
class AiTankController(TankController):
def __init__(self, entity):
self.entity = entity
self.fireTimer = Timer(500)
self.lastMovementTime = pygame.time.get_ticks()
self.pendingPathSearch = None
self.plannedPath = None
self.pathPlanTime = 0
self.searchGridFunction = SearchGridGenerator.getSearchSpaceCellValueForTile
self.stepLength = 50
def update(self, time, timePassed):
if self.fireTimer.update(time):
self.fire(time)
if self.isPathPlanningPending() and self.isPathPlanningCompleted():
if self.pendingPathSearch.pathFound():
self.plannedPath = PlannedPath(self.pendingPathSearch.getPath())
self.resetLastMovementTime(pygame.time.get_ticks())
self.pendingPathSearch = None
def render(self, screen):
pass
#self.renderPlannedPath(screen)
def renderPlannedPath(self, screen):
if self.plannedPath != None:
image = images.get('projectile')
for step in self.plannedPath.path:
screen.blit(image, ((step[0] * 8) + 8, step[1] * 8))
def pathRecalculationNeeded(self, time):
return (not self.hasPath() and not self.isPathPlanningPending()) or self.isPlannedPathExpired(time)
def isPlannedPathExpired(self, time):
return time - self.pathPlanTime > 5000
def canMoveAlongPath(self):
return self.hasPath() and not self.plannedPath.targetReached()
def moveAlongPath(self, time):
movementSteps = int((time - self.lastMovementTime ) / self.stepLength)
if movementSteps > 0:
for _ in range(movementSteps):
self.stepTowardsTarget()
if self.plannedPath.targetReached():
break
self.resetLastMovementTime(time)
def resetLastMovementTime(self, time):
self.lastMovementTime = time
def stepTowardsTarget(self):
targetStep = self.toWorldSpaceTuple(self.plannedPath.getTargetStep())
self.moveTowardsLocation(targetStep)
self.plannedPath.moveToNextStepIfCurrentStepIsReached(self.entity.getLocation().toIntTuple())
def fire(self, time):
self.entity.fire(time)
self.pickRandomFireTime()
def pickRandomFireTime(self):
self.fireTimer.setInterval(random.randint(400, 600))
def plotPathToLocation(self, targetLocation):
searchGrid = SearchGridGenerator.generateSearchGridFromPlayfield(self.searchGridFunction)
start = self.toSearchSpaceCoordinateTuple(self.entity.getLocation())
end = self.toSearchSpaceCoordinateTuple(targetLocation)
self.pendingPathSearch = PathFindingTask(searchGrid, start, end)
PathfinderWorker.queueTask(self.pendingPathSearch)
self.pathPlanTime = pygame.time.get_ticks()
def isPathPlanningPending(self):
return self.pendingPathSearch != None
def isPathPlanningCompleted(self):
return self.pendingPathSearch != None and self.pendingPathSearch.isCompleted()
def hasPath(self):
return self.plannedPath != None
def moveTowardsLocation(self, targetLocation):
location = self.entity.location
if location.x < targetLocation[0]:
self.entity.moveSingleStep(utilities.vectorRight)
elif location.x > targetLocation[0]:
self.entity.moveSingleStep(utilities.vectorLeft)
elif location.y < targetLocation[1]:
self.entity.moveSingleStep(utilities.vectorDown)
elif location.y > targetLocation[1]:
self.entity.moveSingleStep(utilities.vectorUp)
def toSearchSpaceCoordinateTuple(self, coordinates):
return (int(coordinates.x / 8), int(coordinates.y / 8))
def toWorldSpaceTuple(self, coordinates):
return (int(coordinates[0] * 8), int(coordinates[1] * 8))
