I am using pygame to make a game but when I try to load my pictures it results in a error: Couldn't open ball.png. can any one please help? here is my entire code.
To be exact I am trying to figure out why in the class BoxSprite class does ("ball.png") not load. Also why does that happen in class missle and class gun with ("arrow.png") and ("gun.png")???
import pygame
import sys
from pygame.locals import KEYDOWN, KEYUP, K_SPACE, K_ESCAPE, K_RIGHT, K_LEFT
width = 320
height = 240
imageWidth = 32
imageHeight = 32
goingLeft = True
invaderHeight = 0
gunLeft = False
gunRight = False
gunXpos = (width/2)-(imageWidth/2)
delay = 10
class BoxSprite(pygame.sprite.Sprite):
image = None
def __init__(self, initial_position):
pygame.sprite.Sprite.__init__(self)
if BoxSprite.image is None:
BoxSprite.image = pygame.image.load("ball.png")
self.image = BoxSprite.image
self.rect = self.image.get_rect()
self.rect.topleft = initial_position
self.next_update_time = 0 # update() hasn't been called yet.
self.yPos = initial_position[1]
def update(self, current_time, left, right):
global goingLeft, invaderHeight, imageWidth, delay
# Update every 2 milliseconds = 1/500th of a second.
if self.next_update_time < current_time:
# If we're at the left or right the screen, switch directions.
if self.rect.topleft[0] == left:
goingLeft = False
invaderHeight += 1
elif self.rect.topleft[0] == right-imageWidth:
goingLeft = True
invaderHeight += 1
if goingLeft == True:
self.rect.topleft = [self.rect.topleft[0]-1, self.rect.topleft[1]]
else:
self.rect.topleft = [self.rect.topleft[0]+1, self.rect.topleft[1]]
self.rect.topleft = [self.rect.topleft[0], invaderHeight+self.yPos]
self.next_update_time = current_time + delay
class missile(pygame.sprite.Sprite):
image = None
def __init__(self, initial_position):
pygame.sprite.Sprite.__init__(self)
if missile.image is None:
missile.image = pygame.image.load("arrow.png")
self.image = missile.image
self.rect = self.image.get_rect()
self.rect.topleft = initial_position
self.next_update_time = 0 # update() hasn't been called yet.
def update(self, current_time, left, right):
global missile
# Update every 2 milliseconds = 1/500th of a second.
if self.next_update_time < current_time:
# If we're reached the top then stop
if self.rect.topleft[1] == 0:
missiles.remove(self)
self.kill()
return
else:
self.rect.topleft = [self.rect.topleft[0], self.rect.topleft[1]-1]
self.next_update_time = current_time + 4
class gun(pygame.sprite.Sprite):
image = None
def __init__(self):
global width, imageHeight, gunXpos
pygame.sprite.Sprite.__init__(self)
if gun.image is None:
gun.image = pygame.image.load("gun.png")
self.image = gun.image
self.rect = self.image.get_rect()
self.rect.topleft = [gunXpos, height-imageHeight]
self.next_update_time = 0 # update() hasn't been called yet.
def update(self, current_time, left, right):
global gunXpos, width, imageWidth
# check update
if self.next_update_time < current_time:
if gunLeft and gunXpos>0:
gunXpos -= 1
if gunRight and gunXpos<width-imageWidth:
gunXpos += 1
self.rect.topleft = [gunXpos, self.rect.topleft[1]]
self.next_update_time = current_time + 1
def checkInput():
global gunLeft, gunRight, missiles, gunXpos, height
for event in pygame.event.get():
if event.type == KEYDOWN:
if event.key == K_ESCAPE:
sys.exit(0)
elif event.key == K_RIGHT:
gunLeft = False
gunRight = True
elif event.key == K_LEFT:
gunLeft = True
gunRight = False
else:
missiles.append(missile([gunXpos, height]))
elif event.type == KEYUP and event.key != K_SPACE:
gunRight = False
gunLeft = False
def checkCollisions():
global missiles, boxes
if missiles != [] and boxes != []:
for m in missiles:
found = False
for b in pygame.sprite.spritecollide(m, boxes, 0):
boxes.remove(b)
b.kill()
found = True
if found:
missiles.remove(m)
m.kill()
pygame.init()
boxes = []
missiles = []
for x in range(0, width, 32):
for y in range(0, 96, 32):
boxes.append(BoxSprite([x, y]))
screen = pygame.display.set_mode([320, 240])
gunControl = gun()
while boxes != []:
screen.fill([0, 0, 0]) # blank the screen.
time = pygame.time.get_ticks()
for b in boxes:
b.update(time, 0, width)
screen.blit(b.image, b.rect)
checkInput()
checkCollisions()
gunControl.update(time, 0, width)
screen.blit(gunControl.image, gunControl.rect)
for m in missiles:
m.update(time, 0, width)
screen.blit(m.image, m.rect)
pygame.display.update()
if pygame.sprite.spritecollide(gunControl, boxes, 0) != []:
pygame.time.delay(50)
print ("loser")
sys.exit(0)
if len(boxes)<10:
delay = len(boxes)
pygame.time.delay(50)
print ("winner")
http://www.pygame.org/docs/ref/image.html#pygame.image.load
you can use pygame.image.load(os.path.join('path', 'to', 'image.png'))
which returns a Surface object. You should then be able to set your sprite's image attribute to equal this value.
like so:
def __init__(self, initial_position):
pygame.sprite.Sprite.__init__(self)
self.image = pygame.image.load(os.path.join("path", "to", "ball.png"))