I am currently trying to make a game animation based off the game plant versus zombies. When the zombie moves across the screen and contacts the plant, the plant sprite gets saved in a list called plants_eaten_list. The zombie also stops moving to the left. After a 1 second delay (when the plants_eaten_event is triggered), the plant loses 10 health points. When the plant's health reaches 0, the plant sprite dies through the plant.kill() command.
The code for setting up the timer (pygame.time.set_timer(plants_eaten_event, 1000) needs to be inside the main while loop in order to constantly check for a plant within the plants_eaten_list. However, my problem is that for every refresh of the while loop, the timer for the plants_eaten_event gets reset back to 1 second, so the plants_eaten_event never occurs.
Is there any way I can structure the logic of this program to alleviate this issue?
I do not own copyright to any of these images, and the images are intended only for private use.
The zombie image is downloaded from http://plantsvszombies.wikia.com/wiki/Zombie/Gallery?file=Regular_Zombie.png
The plant image is downloaded from http://plantsvszombies.wikia.com/wiki/File:Peashooter.png
Here is my code:
import pygame
import random
BLACK = (0,0,0)
WHITE = (255,255,255)
RED = (255,0,0)
BLUE = (0,0,255)
GREEN = (0,255,0)
pygame.init()
borders_sound = pygame.mixer.Sound("bump.wav")
class Zombie(pygame.sprite.Sprite):
def __init__(self, x, y):
pygame.sprite.Sprite.__init__(self)
self.image = pygame.image.load("Regular_Zombie.png").convert()
self.image.set_colorkey(WHITE)
# Make our top-left corner the passed-in location.
self.rect = self.image.get_rect()
self.rect.x = x
self.rect.y = y
# -- Attributes
# Set speed vector
self.change_x = -1
self.change_y = 0
def changespeed(self, x, y):
""" Change the speed of the player"""
self.change_x += x
self.change_y += y
def move(self):
""" Find a new position for the player"""
#self.change_x = -1
self.rect.x += self.change_x
#print(self.rect.x)
#times = 0
if self.rect.x < 0:
self.rect.x = 0
def eatplant(self,plant):
pygame.time.set_timer(plants_eaten_event,6000)
self.change_x = 0
plant.health = plant.health - 10
class Plant(pygame.sprite.Sprite):
def __init__(self, x, y):
pygame.sprite.Sprite.__init__(self)
self.image = pygame.image.load("Peashooter.png").convert()
self.image.set_colorkey(BLUE)
self.rect = self.image.get_rect()
self.rect.x = x
self.rect.y = y
self.alive = True
self.health = 60
screen_width = 700
screen_height = 400
screen = pygame.display.set_mode([screen_width, screen_height])
all_sprites_list = pygame.sprite.Group()
plants_list = pygame.sprite.Group()
zombies_list = pygame.sprite.Group()
zombie1 = Zombie(690, 15)
plant1 = Plant(300,15)
all_sprites_list.add(zombie1)
all_sprites_list.add(plant1)
plants_list.add(plant1)
zombies_list.add(zombie1)
done = False
clock = pygame.time.Clock()
plants_eaten_event = pygame.USEREVENT + 1
while not done:
for event in pygame.event.get():
if event.type == pygame.QUIT:
done = True
# If plant.health = 0 at the end of the timer, the plant is eaten.
# If plant.health != 0 at the end of the timer, the entire event
# must happen again in the while loop until the health = 0
elif event.type == plants_eaten_event:
print("Zombie 1 ate plant 1")
zombie1.eatplant(plant)
# Set timer equal to 0 until another plant gets eaten or zombie continues eating current plant
pygame.time.set_timer(plants_eaten_event, 0)
if plant.health == 0:
plant.alive = False
plant.kill()
zombie1.change_x = -1
zombie1.move()
elif event.type == zombie_eaten_plant_event:
zombie1.change_x = -1
zombie1.move()
print("Zombie 1 is eating plant")
pygame.time.set_timer(zombie_eaten_plant_event, 0)
screen.fill(WHITE)
zombie1.move()
if times == 0 and zombie1.rect.x <= 0:
times = times + 1
borders_sound.play()
all_sprites_list.draw(screen)
all_sprites_list.update()
# I set the do kill command in spritecollide command to False because I
# needed to delay the plants that were eaten before they were removed. They
# will be removed after six seconds(symbolize zombies eating plants). Aftera
# a period of time, then I will create a loop that will loop through all plants
# in the plants_eaten_list and use .kill() . I will need to create a separate
# collision function that will stall the zombies until the plants are killed.
plants_eaten_list = pygame.sprite.spritecollide(zombie1,plants_list,False)
# I changed the delay to 6 seconds, and plant 1 still died instantly. The zombie
# stayed frozen in place for 6 seconds before teh 2nd plant was instantly destroyed
for plant in plants_eaten_list:
# If I remove this, plant1 is not killed, even though
# there is the same code within the plants_eaten_event function.
if plant1.health == 0:
plant1.kill()
# The while loop loops so fast that the timer doesnot have a chance to
# finish its countdown before it restarts again. Will I need some kind of a threading
# module to prevent the timers from restarting until they end?
pygame.time.set_timer(plants_eaten_event, 1000)
for plant_eaten in plants_eaten_list:
borders_sound.play()
clock.tick(60)
pygame.display.flip()
pygame.quit()
my problem is that for every refresh of the while loop, the timer for the plants_eaten_event gets reset back to 1 second, so the plants_eaten_event never occurs.
That happens because the rect of the zombie still collides with the rect of the plant in the next frame, spritecollide returns the list with the colliding plant and the for plant in plants_eaten_list: loop where you call set_timer gets executed again each frame.
The first thing you need to do is to set the zombie.rect.left position to plant.rect.right after the first collision, so that the sprites don't collide anymore in the next frame:
for plant in plants_eaten_list:
zombie1.change_x = 0 # Stop the zombie.
# Move the rect so that it doesn't touch the plant's rect anymore.
zombie1.rect.left = plant.rect.right
if plant1.health <= 0:
plant1.kill()
pygame.time.set_timer(plants_eaten_event, 1000)
borders_sound.play()
However, once you start adding more zombies, the code will break because you use the zombie1 and the plant variable (which depends on the for plant in plants_eaten_list: loop) in the event loop, so it will work only for this zombie and the last collided plant. Unfortunately, it's not possible to send more information than the event type with pygame.time.set_timer, otherwise you could attach the specific zombie and plant to the event in order to handle them in the event loop.
An alternative solution would be to give each zombie an own timer attribute (just a number) which you can update in their update methods.
So when the zombie touches a plant, I start the timer by setting it to 1 (second) and then decrement it by the delta time (the time needed for the last frame) each frame. I also stop the zombie self.change_x = 0, move the rect back self.rect.left = plant.rect.right and store a reference to the plant because we need it to reduce its health when the timer is finished.
Once the timer is <= 0 the zombie starts to move again, takes a bite of the plant, the sprites touch again and the timer is started anew.
import pygame
WHITE = (255,255,255)
BLUE = (0,0,255)
GREEN = (0,255,0)
class Zombie(pygame.sprite.Sprite):
def __init__(self, x, y):
pygame.sprite.Sprite.__init__(self)
self.image = pygame.Surface((30, 50))
self.image.fill(BLUE)
self.rect = self.image.get_rect(topleft=(x, y))
self.change_x = -1
self.timer = 0 # Timer for the attacks.
self.plant = None # Currently attacked target.
def update(self, dt):
"""Update the zombie."""
if self.timer != 0:
self.timer -= dt
if self.timer <= 0: # Move if the timer is inactive.
self.change_x = -1
# Check if a plant is touching and eat it.
if self.plant is not None:
self.plant.health -= 10
print('Health', self.plant.health)
if self.plant.health <= 0:
print('Eaten')
self.plant.kill()
self.plant = None
self.timer = 0
self.rect.x += self.change_x
if self.rect.x < 0:
self.rect.x = 0
def eatplant(self, plants):
print('Play sound')
self.change_x = 0 # Stop the zombie.
self.timer = 1 # Start the timer.
for plant in plants:
self.plant = plant # Store a reference to the plant.
# Move the zombie back, so that the sprites
# don't collide anymore.
self.rect.left = plant.rect.right
class Plant(pygame.sprite.Sprite):
def __init__(self, x, y):
pygame.sprite.Sprite.__init__(self)
self.image = pygame.Surface((30, 50))
self.image.fill(GREEN)
self.rect = self.image.get_rect(topleft=(x, y))
self.health = 30
pygame.init()
screen = pygame.display.set_mode([700, 400])
# No need to assign the sprites to variables.
plants = pygame.sprite.Group(Plant(500, 15), Plant(350, 115))
zombies = pygame.sprite.Group(Zombie(690, 15), Zombie(690, 115))
all_sprites = pygame.sprite.Group(plants, zombies)
clock = pygame.time.Clock()
dt = 0
done = False
while not done:
for event in pygame.event.get():
if event.type == pygame.QUIT:
done = True
# Pass the delta time to the update methods of the sprites.
all_sprites.update(dt)
# groupcollide returns a dictionary of the collided zombies and plants.
plants_eaten = pygame.sprite.groupcollide(zombies, plants, False, False)
for zombie, collided_plants in plants_eaten.items():
zombie.eatplant(collided_plants)
screen.fill(WHITE)
all_sprites.draw(screen)
dt = clock.tick(60) / 1000 # Time in seconds since last tick.
pygame.display.flip()
pygame.quit()
Related
I figured out how to include gravity in the platform game I am working on.
The problem is, the sprite jumps up and falls down too slowly. Moving horizontally is not a problem but the sprite significantly slows down when jumping.
How would I solve this problem? Thank you.
Here is the part of my code for gravity. :
def update(self):
""" Move the player. """
# Gravity
self.calc_grav()
# Move left/right
self.rect.x += self.change_x
# See if we hit anything
block_hit_list = pygame.sprite.spritecollide(self, self.level.platform_list, False)
for block in block_hit_list:
# If we are moving right,
# set our right side to the left side of the item we hit
if self.change_x > 0:
self.rect.right = block.rect.left
elif self.change_x < 0:
# Otherwise if we are moving left, do the opposite.
self.rect.left = block.rect.right
# Move up/down
self.rect.y += self.change_y
# Check and see if we hit anything
block_hit_list = pygame.sprite.spritecollide(self, self.level.platform_list, False)
for block in block_hit_list:
# Reset our position based on the top/bottom of the object.
if self.change_y > 0:
self.rect.bottom = block.rect.top
elif self.change_y < 0:
self.rect.top = block.rect.bottom
# Stop our vertical movement
self.change_y = 0
def calc_grav(self):
""" Calculate effect of gravity. """
if self.change_y == 0:
self.change_y = 1
else:
self.change_y += 0.5
# See if we are on the ground.
if self.rect.y >= SCREEN_HEIGHT - self.rect.height and self.change_y >= 0:
self.change_y = 0
self.rect.y = SCREEN_HEIGHT - self.rect.height
def jump(self):
""" Called when user hits 'jump' button. """
# move down a bit and see if there is a platform below us.
# Move down 2 pixels because it doesn't work well if we only move down
# 1 when working with a platform moving down.
self.rect.y += 2
platform_hit_list = pygame.sprite.spritecollide(self, self.level.platform_list, False)
self.rect.y -= 2
# If it is ok to jump, set our speed upwards
if len(platform_hit_list) > 0 or self.rect.bottom >= SCREEN_HEIGHT:
self.change_y = -12
# Player-controlled movement:
def go_left(self):
""" Called when the user hits the left arrow. """
self.change_x = -8
def go_right(self):
""" Called when the user hits the right arrow. """
self.change_x = 8
def stop(self):
""" Called when the user lets off the keyboard. """
self.change_x = 0
i am trying to make a simple game but movement doesn't work properly
i want it to constantly move while the buttons are pressed but respect the borders of the screen currently the buttons will work overall but it causes the rectangle to stutter, here is my code,
import pygame
pygame.init()
SD = pygame.display.set_mode((640,480))
x = 16
y = 16
while True:
for event in pygame.event.get():
if event.type == pygame.QUIT:
pygame.quit()
quit()
keys = pygame.key.get_pressed()
if keys[pygame.K_w]:
if y > 0:
y -= 8
if keys[pygame.K_a]:
if x > 0:
x -= 8
if keys[pygame.K_s]:
if y < 448:
y += 8
if keys[pygame.K_d]:
if x < 608:
x += 8
SD.fill((255,255,255))
pygame.draw.rect(SD, (255,0,0), (x,y, 30, 30))
pygame.display.update()
pygame.event.get() will only return an event if a hardware event happened like pressing a key. So your if keys[...] won't be evaluated when nothing happens (a pressed key event won't get repeated)
Move your ifs one level up and it will work without stuttering but you'll have to slow down the movement of your box afterwards (a sleep(0.1) will do for the example but you probably want to move to something more advanced since you don't want to sleep in you drawing loop)
The way key presses are handled in pygame (and most other game engines) is that you only get an event when a key is pressed or released. The reason your character movement is looking so jumpy, is because the key press is being handled like holding a key down in a text editor. If you hold the key down, a letter will show up and after a short while you'll get lots of the letter repeating.
What you really want to do is to have a boolean for each key that you set to True when you get a key press event, and False when you get a key release event (take a very careful look at the process_events function).
I've modified your code to do just that (along with some other changes that I'll explain afterwards):
import pygame
class Game(object):
def __init__(self):
"""
Initialize our game.
"""
# The initial position.
self.x = 16
self.y = 16
# The keyboard state.
self.keys = {
pygame.K_w: False,
pygame.K_a: False,
pygame.K_s: False,
pygame.K_d: False,
}
# Create the screen.
self.SD = pygame.display.set_mode((640,480))
def move_character(self):
"""
Move the character according to the current keyboard state.
"""
# Process vertical movement.
if self.keys[pygame.K_w] and self.y > 0:
self.y -= 1
if self.keys[pygame.K_s] and self.y < 448:
self.y += 1
# Process horizontal movement.
if self.keys[pygame.K_a] and self.x > 0:
self.x -= 1
if self.keys[pygame.K_d] and self.x < 608:
self.x += 1
def process_events(self):
"""
Go through the pending events and process them.
"""
for event in pygame.event.get():
if event.type == pygame.QUIT:
pygame.quit()
quit()
# If the event is a key press or release event, then register it
# with our keyboard state.
elif event.type == pygame.KEYDOWN:
self.keys[event.key] = True
elif event.type == pygame.KEYUP:
self.keys[event.key] = False
def draw(self):
"""
Draw the game character.
"""
self.SD.fill((255,255,255))
pygame.draw.rect(self.SD, (255,0,0), (self.x, self.y, 30, 30))
pygame.display.update()
def run(self):
while True:
self.process_events()
self.move_character()
self.draw()
def main():
pygame.init()
game = Game()
game.run()
# This just means that the main function is called when we call this file
# with python.
if __name__ == '__main__':
main()
The biggest change I've made is to move your game into a class to give you better access to variables from your functions. It also lets you partition your code into different functions that make it easier to read.
hello am using this code to make the player sprite follow the position of mouse (left /right) , but when the mouse stops in specific location the player follow it then began vibrating from left to right
i think the problem is in self.vel_x of the update function.
class Player(pygame.sprite.Sprite):
#init Player Sprite
#sprite player
def __init__(self):
pygame.sprite.Sprite.__init__(self)
self.image=pygame.image.load(os.path.join(image_folder,"Player.png"))
self.rect = self.image.get_rect()
self.vel_x = 0
self.speed = 30
self.friction = 3.5
self.rect.center = (420,360)
self.delta = clock.tick(FPS) / 1000.00
def update(self):
self.getX = pygame.mouse.get_pos()[0]-100 # get the X position of mouse
self.rect.x +=self.vel_x
##i think the problem is in here
self.vel_x = self.vel_x*(1-min(self.delta*self.friction,1))
#print "the GetX is ", self.getX
#print "the Rect.x is ", self.rect.x
if self.getX > self.rect.x:
self.vel_x+= self.speed*self.delta
else:
self.vel_x-= self.speed*self.delta
The problem here is your velocity step size. self.speed*self.delta is bigger than 1 pixel, which is the space that the mouse cursor consumes. Try checking for the distance between your player and the cursor. If that distance is less than a certain resolution don't update the position of the sprite.
resolution = 5 # pixels
if abs(self.getX - self.rect.x) > resolution:
if self.getX > self.rect.x:
self.vel_x+= self.speed*self.delta
else:
self.vel_x-= self.speed*self.delta
else:
self.vel_x = 0
Thanks for looking at my question and helping me out. I have a user controlled sprite that should cause the screen to shift around the sprite's position, kinda like an old Gameboy Pokemon game, yet that does not happen. Instead my sprite is stuck inside a box of coordinates that I used to help define parameters for background shift. This is the code I believe is causing this:
# Shift world left (-x)
if player.rect.right >= 510:
diff = player.rect.right - 510
player.rect.right = 510
current_level.shift_world_x(-diff)
# Shift world right (+x)
if player.rect.left <= 130:
diff = 130 - player.rect.left
player.rect.left = 130
current_level.shift_world_x(diff)
# Shift world up (-y)
if player.rect.top <= 100:
diff = 100 - player.rect.top
player.rect.top = 100
current_level.shift_world_y(diff)
# Shift world down (y)
if player.rect.bottom >= 380:
diff = player.rect.bottom - 380
player.rect.bottom = 380
current_level.shift_world_y(-diff)
If I put a # next to player.rect.right = 510, or any of the other three varients, my sprite can move freely, yet the screen will not shift.
Zip file with all assets is here:
https://www.dropbox.com/s/3g2w0mv1fuupetl/DoneGeon.zip?dl=0
The entirety of my code is as follows:
import pygame
"""---Global Constants---"""
# Colors
BLACK = (0, 0, 0)
# Screen Variables
screen_x = 720
screen_y = 480
# Background variables
back_x = 0
back_y = -243
back_x_change = 0
back_y_change = 0
class Player(pygame.sprite.Sprite):
"""---User Controled Character---"""
# Methods
def __init__(self):
"""---Contructor Function---"""
# Call parent's constructor
pygame.sprite.Sprite.__init__(self)
# Load player image
self.image = pygame.image.load("player.png").convert()
# Set referance to image "hit box"
self.rect = self.image.get_rect()
# Set speed of player
self.change_x = 0
self.change_y = 0
def update(self):
"""---Move the Player---"""
# Move left/right
self.rect.x += self.change_x
# Move up/down
self.rect.y += self.change_y
# User controlled movements
def go_left(self):
self.change_x = -3
def go_right(self):
self.change_x = 3
def go_up(self):
self.change_y = -3
def go_down(self):
self.change_y = 3
def stop_x(self):
self.change_x = 0
def stop_y(self):
self.change_y = 0
class Barrier(pygame.sprite.Sprite):
"""---Barriers that prevent player from passing---"""
def __init__(self,width,height):
""" Barrier constructor """
pygame.sprite.Sprite.__init__(self)
self.image = pygame.Surface([width,height])
self.image.fill(BLACK)
self.rect = self.image.get_rect()
class Level():
"""---All levels will spawn from this generic class---"""
def __init__(self,player):
""" Needed for when sprites collide with player """
self.barrier_list = pygame.sprite.Group()
self.enemy_list = pygame.sprite.Group()
self.player = player
# Distance world has been shifted left/right
self.world_shift_x = 0
# Background image
background_base = None
background_layera = None
# Distance world has been shifted up/down
self.world_shift_y = 0
def update(self):
""" Update everything on level """
self.barrier_list.update()
self.enemy_list.update()
def draw(self,screen):
""" Draw everything on level """
# Draw barriers
self.barrier_list.draw(screen)
# Draw the base layer
screen.blit(self.background_base,(back_x,back_y))
# Draw all sprites
self.enemy_list.draw(screen)
# Draw Layer A
screen.blit(self.background_layera,(back_x,back_y))
def shift_world_x(self,shift_x):
""" When character moves left/right, everything must follow """
# Track shift amount
self.world_shift_x += shift_x
# Go through all list and shift
for barrier in self.barrier_list:
barrier.rect.x += shift_x
for enemy in self.enemy_list:
enemy.rect.x += shift_x
def shift_world_y(self,shift_y):
""" When character moves up/down, everything must follow """
# Track shift amount
self.world_shift_y += shift_y
# Go through all list and shift
for barrier in self.barrier_list:
barrier.rect.y += shift_y
for enemy in self.enemy_list:
enemy.rect.y += shift_y
class Level_1(Level):
"""---Forest 1---"""
def __init__(self,player):
""" Create the level """
# Call parent constructor
Level.__init__(self,player)
self.level_limit_x = -1912
self.level_limit_y = 1080
# Make background
self.background_base = pygame.image.load("base1.png").convert()
self.background_layera = pygame.image.load("layera1.png").convert()
self.background_layera.set_colorkey(BLACK)
# List with w, h, x = 32, y = 32 of barriers
# Remove comment to activate-> level = []
# Go through the list above and add barriers
# Remove comment to activate-> for barriers in level:
def main():
"""---Main Program---"""
pygame.init()
# Set screen size and caption
size = (screen_x,screen_y)
screen = pygame.display.set_mode(size)
pygame.display.set_caption("DoneGeon")
# Create Player
player = Player()
# Create all levels
level_list= []
level_list.append(Level_1(player))
# Set current level
current_level_no = 0
current_level = level_list[current_level_no]
# Add all sprites
active_sprite_list = pygame.sprite.Group()
# Add player
player.level = current_level
player.rect.x = 360
player.rect.y = 240
active_sprite_list.add(player)
# Loop until closed
done = False
# Screen update rate
clock = pygame.time.Clock()
# -------- Main Program Loop -----------
while not done:
"""---Main event loop---"""
for event in pygame.event.get():
if event.type == pygame.QUIT:
done = True
"""---User Controls---"""
# Key Pressed
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_LEFT:
player.go_left()
if event.key == pygame.K_RIGHT:
player.go_right()
if event.key == pygame.K_UP:
player.go_up()
if event.key == pygame.K_DOWN:
player.go_down()
# Key Released
if event.type == pygame.KEYUP:
if event.key == pygame.K_LEFT or event.key == pygame.K_RIGHT:
player.stop_x()
if event.key == pygame.K_UP or event.key == pygame.K_DOWN:
player.stop_y()
"""---Game Logic---"""
# Update Player
active_sprite_list.update()
# Update items in level
current_level.update()
# Shift world left (-x)
if player.rect.right >= 510:
diff = player.rect.right - 510
player.rect.right = 510
current_level.shift_world_x(-diff)
# Shift world right (+x)
if player.rect.left <= 130:
diff = 130 - player.rect.left
player.rect.left = 130
current_level.shift_world_x(diff)
# Shift world up (-y)
if player.rect.top <= 100:
diff = 100 - player.rect.top
player.rect.top = 100
current_level.shift_world_y(diff)
# Shift world down (y)
if player.rect.bottom >= 380:
diff = player.rect.bottom - 380
player.rect.bottom = 380
current_level.shift_world_y(-diff)
"""---Draw below here---"""
current_level.draw(screen)
active_sprite_list.draw(screen)
pygame.display.flip()
clock.tick(60)
pygame.quit()
if __name__ == "__main__":
main()
Thank you for any advice!
I think you'll find this easier to track down if you log the changes in player x and world x. Often with games small changes aren't visible so logging is the only way to monitor what's happening in the game loop.
I haven't tested this but my bet is that you've got a negative in the wrong place. This:
def shift_world_x(self,shift_x):
""" When character moves left/right, everything must follow """
suggests that if the player right edge moves past the world right edge the world right edge should extend to match the player but this code does the reverse:
if player.rect.right >= 510:
diff = player.rect.right - 510
player.rect.right = 510
current_level.shift_world_x(-diff)
If the player.right moves to 513 diff will be 3 so shift_world_x will be called with -3, moving the world box left to 507. Player right will then be set to 510 so the player right will still be outside the box the next loop. This suggests that the world image will drift to the left with the player sprite stuck at the right edge but it sounds like it's trapped against the right edge (I'm focussing on one edge because the logic is the same for all).
If you log player.rect.right and world.rect.right in the if shown above you should see the values as they change and get a better feel for what the game logic is doing.
I am new to Python and Pygame. I want to have a screen in pygame with multiple copies of the same images moving around independently. I have tried to write it as a class and then call instances of it inside the while loop, but it doesn't work. Could someone show how can i basically do such a thing using a class?
I've tried to keep everything simple
Example:
import pygame
pygame.init()
WHITE = (255,255,255)
BLUE = (0,0,255)
window_size = (400,400)
screen = pygame.display.set_mode(window_size)
clock = pygame.time.Clock()
class Image():
def __init__(self,x,y,xd,yd):
self.image = pygame.Surface((40,40))
self.image.fill(BLUE)
self.x = x
self.y = y
self.x_delta = xd
self.y_delta = yd
def update(self):
if 0 <= self.x + self.x_delta <= 360:
self.x += self.x_delta
else:
self.x_delta *= -1
if 0 <= self.y + self.y_delta <= 360:
self.y += self.y_delta
else:
self.y_delta *= -1
screen.blit(self.image,(self.x,self.y))
list_of_images = []
list_of_images.append(Image(40,80,2,0))
list_of_images.append(Image(160,240,0,-2))
done = False
while not done:
for event in pygame.event.get():
if event.type == pygame.QUIT:
done = True
screen.fill(WHITE)
for image in list_of_images:
image.update()
pygame.display.update()
clock.tick(30)
pygame.quit()
Each image can be called individually from the list and moved by simply changing Image.x/y to whatever you want