I'm learning pygame and followed a tutorial about a pong game.
Everything is from the tutorial except the score system, I implemented.
It does work, but instead that the score is updated, the new score is printed over the previous score.. Which isn't a nice view. How can I solve this?
(I think only the main function is important for this problem, but I'm giving whole the code to be sure)
#!/usr/bin/python
try:
import sys
import random
import math
import os
import getopt
import pygame
from socket import *
from pygame.locals import *
except ImportError, err:
print "couldn't load module. %s" % (err)
sys.exit(2)
def load_png(name):
"""Load image and return image object"""
fullname = os.path.join('data',name)
try:
image=pygame.image.load(fullname)
if image.get_alpha() is None:
image = image.convert()
else:
image = image.convert_alpha()
except pygame.error, message:
print 'Cannot load image:', fullname
raise SystemExit,message
return image, image.get_rect()
class Ball(pygame.sprite.Sprite):
def __init__(self,(xy),vector):
pygame.sprite.Sprite.__init__(self)
self.image, self.rect = load_png("ball.png")
screen = pygame.display.get_surface()
self.area = screen.get_rect()
self.vector = vector
self.hit = 0
def update(self):
newpos = self.calcnewpos(self.rect,self.vector)
self.rect = newpos
(angle,z) = self.vector
if not self.area.contains(newpos):
tl = not self.area.collidepoint(newpos.topleft)
tr = not self.area.collidepoint(newpos.topright)
bl = not self.area.collidepoint(newpos.bottomleft)
br = not self.area.collidepoint(newpos.bottomright)
if tr and tl or (br and bl):
angle = -angle
if tl and bl:
angle = math.pi - angle
player2.score+=1
if tr and br:
angle = math.pi - angle
player1.score+=1
else:
player1.rect.inflate(-3,-3)
player2.rect.inflate(-3,-3)
if self.rect.colliderect(player1.rect) == 1 and not self.hit:
angle = math.pi - angle
self.hit = not self.hit
elif self.rect.colliderect(player2.rect) == 1 and not self.hit:
angle = math.pi - angle
self.hit = not self.hit
elif self.hit:
self.hit = not self.hit
self.vector = (angle,z)
def calcnewpos(self,rect,vector):
(angle,z)=vector
(dx,dy)=(z*math.cos(angle),z*math.sin(angle))
return rect.move(dx,dy)
class Bat(pygame.sprite.Sprite):
def __init__(self, side):
pygame.sprite.Sprite.__init__(self)
self.image,self.rect = load_png('bat.png')
screen = pygame.display.get_surface()
self.area = screen.get_rect()
self.side=side
self.speed=10
self.score=0
self.state="still"
self.reinit()
def reinit(self):
self.state="still"
self.movepos=[0,0]
if self.side=="left":
self.rect.midleft=self.area.midleft
elif self.side == "right":
self.rect.midright = self.area.midright
def update(self):
newpos = self.rect.move(self.movepos)
if self.area.contains(newpos):
self.rect=newpos
pygame.event.pump()
def moveup(self):
self.movepos[1] = self.movepos[1] - (self.speed)
self.state = "moveup"
def movedown(self):
self.movepos[1] = self.movepos[1] + (self.speed)
self.state = "movedown"
def main():
pygame.init()
screen = pygame.display.set_mode((640,480))
pygame.display.set_caption('Basic Pong')
background = pygame.Surface(screen.get_size())
background = background.convert()
background.fill((255,255,255))
global player1
global player2
player1 = Bat("left")
player2 = Bat("right")
speed=13
rand = ((0.1 * (random.randint(5,8))))
ball = Ball((0,0),(0.47,speed))
playersprites = pygame.sprite.RenderPlain((player1,player2))
ballsprite = pygame.sprite.RenderPlain(ball)
screen.blit(background, (0,0))
pygame.display.flip()
font=pygame.font.Font(None,50)
clock = pygame.time.Clock()
while 1:
clock.tick(60)
for event in pygame.event.get():
if event.type == QUIT:
return
elif event.type == KEYDOWN:
if event.key == K_a:
player1.moveup()
if event.key == K_z:
player1.movedown()
if event.key == K_UP:
player2.moveup()
if event.key == K_DOWN:
player2.movedown()
elif event.type == KEYUP:
if event.key == K_a or event.key == K_z:
player1.movepos = [0,0]
player1.state="still"
if event.key == K_UP or event.key == K_DOWN:
player2.movepos = [0,0]
player2.state="still"
text=font.render(str(player1.score)+" | "+str(player2.score),1,(0,0,0))
screen.blit(text, (320,10))
screen.blit(background, ball.rect,ball.rect)
screen.blit(background, player1.rect, player1.rect)
screen.blit(background, player2.rect, player2.rect)
ballsprite.update()
playersprites.update()
ballsprite.draw(screen)
playersprites.draw(screen)
pygame.display.flip()
if __name__ == '__main__': main()