Develop Reference

How could I get my loading_screen() to display pygame [duplicate]

While I've been using time.wait in my code since I began learning Python and Pygame, I've been wondering if there are any other ways to do it and what are the advantages and disadvantages of each approach. For example, Pygame also has a pygame.time.wait. What's the difference between python's wait and pygame's wait functions? Which one is better? And are there other ways to wait some time besides using these two functions?

For animation / cooldowns, etc: If you want to 'wait', but still have code running you use: pygame.time.get_ticks
class Unit():
def __init__(self):
self.last = pygame.time.get_ticks()
self.cooldown = 300
def fire(self):
# fire gun, only if cooldown has been 0.3 seconds since last
now = pygame.time.get_ticks()
if now - self.last >= self.cooldown:
self.last = now
spawn_bullet()

For Python in general, you will want to look at the sleep library.
For Pygame, however, using pygame.time.delay() will pause for a given number of milliseconds based on the CPU clock for more accuracy (as opposed to pygame.time.wait).

If you just wait for some time, you can use pygame.time.wait or pygame.time.delay. However, if you want to display a message and then wait some time, you need to update the display beforehand. The display is updated only if either pygame.display.update() or pygame.display.flip()
is called. See pygame.display.flip():
This will update the contents of the entire display.
Further you've to handles the events with pygame.event.pump(), before the update of the display becomes visible in the window. See pygame.event.pump():
For each frame of your game, you will need to make some sort of call to the event queue. This ensures your program can internally interact with the rest of the operating system.
This all means that you have to call pygame.display.flip() and pygame.event.pump() before pygame.time.delay() or pygame.time.wait():
screen.blit(text, (x, y))
pygame.display.flip()
pygame.event.pump()
pygame.time.delay(delay * 1000) # 1 second == 1000 milliseconds
See also Why doesn't PyGame draw in the window before the delay or sleep?
In any case, this is not the way to wait or delay something in a typical application. The game does not respond while you wait. Use pygame.time.get_ticks() to measure the time.
For instance if you want to show a message on the display, get the current time and calculate the point in time after that the message has to disappear. Display the message as long as the current time is below the calculated time:
message_end_time = 0
run = True
while run:
for event in pygame.event.get():
if event.type == pygame.QUIT:
run = False
# [...]
current_time = pygame.time.get_ticks()
if something_has_happened:
message_surf = font.render('Important message!', True, (255, 0, 0))
message_end_time = pygame.time.get_ticks() + 3000 # display for 3 seconds
window.fill(0)
# [...]
if current_time < message_end_time:
window.blit(message_surf, (x, y))
pygame.display.flip()
See also How do I stop more than 1 bullet firing at once?
Minimal example: repl.it/#Rabbid76/PyGame-MessageDelay
import pygame
pygame.init()
font = pygame.font.SysFont(None, 50)
text = font.render('press key or mouse', True, (255, 0, 0))
window = pygame.display.set_mode((500, 200))
clock = pygame.time.Clock()
message_end_time = pygame.time.get_ticks() + 3000
run = True
while run:
clock.tick(60)
current_time = pygame.time.get_ticks()
for event in pygame.event.get():
if event.type == pygame.QUIT:
run = False
if event.type == pygame.KEYDOWN:
text = font.render(pygame.key.name(event.key) + ' pressed', True, (255, 0, 0))
message_end_time = pygame.time.get_ticks() + 2000
if event.type == pygame.MOUSEBUTTONDOWN:
text = font.render('button ' + str(event.button) + ' pressed', True, (255, 0, 0))
message_end_time = pygame.time.get_ticks() + 2000
window.fill(0)
if current_time < message_end_time:
window.blit(text, text.get_rect(center = window.get_rect().center))
pygame.display.flip()
pygame.quit()
exit()

Pygame screen doesn't seem to refresh

I've been trying to make a Chrome Dino Game, however, I'm struggling with this problem:
On every frame, it should draw a new one at the new position and delete the previous one to make it look as if it's moving. HOWEVER, it remains at its previous position and a new image appears on its next position. I did write the pygame.display.update() code at the end of my maintop.
In the last time I ran into a similar problem, I managed to make it work by drawing a background image, but this time, it doesn't work.
following are my codes:
import pygame
import os
from random import randint
import schedule
pygame.init()
assets = os.path.join(os.path.dirname(__file__), "Assets")
screen_size = (screen_width, screen_height) = (1280, 720)
screen = pygame.display.set_mode(screen_size)
clock = pygame.time.Clock()
fps = 120
bg = pygame.image.load(os.path.join(assets, "IMG_15.png"))
ground = 700
running = True
spacebaridx = 0
gamestart = False
tick_on_start = 0
obs1 = pygame.image.load(os.path.join(assets, "colourmat/light_green.png"))
pygame.transform.scale(obs1, (100, 200))
obs2 = pygame.image.load(os.path.join(assets, "colourmat/light_green.png"))
pygame.transform.scale(obs2, (120, 200))
obs3 = pygame.image.load(os.path.join(assets, "colourmat/light_green.png"))
pygame.transform.scale(obs3, (150, 200))
ls_obs = []
def create_obs():
k = randint(1, 3)
if k == 1:
info = {"type":1, "img":obs1, "x":screen_width, "y":ground - 200, "tox":2}
ls_obs.append(info)
if k == 2:
info = {"type":2, "img":obs2, "x":screen_width, "y":ground - 200, "tox":2}
ls_obs.append(info)
else:
info = {"type":3, "img":obs3, "x":screen_width, "y":ground - 200, "tox":2}
ls_obs.append(info)
schedule.every(3).seconds.do(create_obs)
while running:
dt = clock.tick(fps)
if gamestart == True:
game_ticks = pygame.time.get_ticks() - tick_on_start
schedule.run_pending()
else:
game_ticks = pygame.time.get_ticks()
for event in pygame.event.get():
if event.type == pygame.QUIT: running = False
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_SPACE:
if spacebaridx == 0: # Press space to start / to tell whether it's the first press
spacebaridx += 1
gamestart = True
tick_on_start = pygame.time.get_ticks()
else:
pass # Jump
for o in ls_obs:
o["x"] += o["tox"] * -1
screen.blit(bg, (0, 0))
for o in ls_obs:
screen.blit(o["img"], (o["x"], o["y"]))
pygame.display.update()
pygame.quit()

This issue is occurring because you aren't clearing the display within each frame. In pygame, in order to clear the display, we need to use the fill method. So in your code, at the top of your game loop before the event loop, add screen.fill((0, 0, 0)). This will fill your screen in the color black. Don't worry, the black won't be shown if you draw the background on top of it. Now, when you add a new image, the previous images won’t be displayed.
Modified Game Loop
while running:
screen.fill((0, 0, 0))
dt = clock.tick(fps)
if gamestart == True:
game_ticks = pygame.time.get_ticks() - tick_on_start
schedule.run_pending()
else:
game_ticks = pygame.time.get_ticks()
for event in pygame.event.get():
if event.type == pygame.QUIT: running = False
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_SPACE:
if spacebaridx == 0: # Press space to start / to tell whether it's the first press
spacebaridx += 1
gamestart = True
tick_on_start = pygame.time.get_ticks()
else:
pass # Jump
for o in ls_obs:
o["x"] += o["tox"] * -1
screen.blit(bg, (0, 0))
for o in ls_obs:
screen.blit(o["img"], (o["x"], o["y"]))
pygame.display.update()
pygame.quit()

Pausing time.time flow

I making a game with Python and Pygame, and I'm using time.time to time the users going through levels. However, I also have a pause menu. How can I make so when the pause menu is open, time.time won't continue?

I think I'd do something like this: Use the time that clock.tick() returns to increase a timer each frame if the game is not paused, and when the user pauses and unpauses the game call it without an argument to discard the time that passed while the game was paused.
import sys
import pygame as pg
pg.init()
screen = pg.display.set_mode((640, 480))
clock = pg.time.Clock()
font = pg.font.Font(None, 30)
timer = 0
dt = 0
paused = False
running = True
while running:
for event in pg.event.get():
if event.type == pg.QUIT:
running = False
elif event.type == pg.KEYDOWN:
paused = not paused
# This is needed to discard the time that
# passed while the game was paused.
clock.tick()
if not paused:
timer += dt # Add delta time to increase the timer.
screen.fill((30, 30, 30))
txt = font.render(str(round(timer, 2)), True, (90, 120, 40))
screen.blit(txt, (20, 20))
pg.display.flip()
dt = clock.tick(30) / 1000 # dt = time in seconds since last tick.
pg.quit()
sys.exit()

Pygame-Countdown Timer On Screen With Other Stuff [duplicate]

I started using pygame and I want to do simple game. One of the elements which I need is countdown timer.
How can I do the countdown time (eg 10 seconds) in PyGame?

Another easy way is to simply use pygame's event system.
Here's a simple example:
import pygame
pygame.init()
screen = pygame.display.set_mode((128, 128))
clock = pygame.time.Clock()
counter, text = 10, '10'.rjust(3)
pygame.time.set_timer(pygame.USEREVENT, 1000)
font = pygame.font.SysFont('Consolas', 30)
run = True
while run:
for e in pygame.event.get():
if e.type == pygame.USEREVENT:
counter -= 1
text = str(counter).rjust(3) if counter > 0 else 'boom!'
if e.type == pygame.QUIT:
run = False
screen.fill((255, 255, 255))
screen.blit(font.render(text, True, (0, 0, 0)), (32, 48))
pygame.display.flip()
clock.tick(60)

On this page you will find what you are looking for http://www.pygame.org/docs/ref/time.html#pygame.time.get_ticks
You download ticks once before beginning the countdown (which can be a trigger in the game - the key event, whatever).
For example:
start_ticks=pygame.time.get_ticks() #starter tick
while mainloop: # mainloop
seconds=(pygame.time.get_ticks()-start_ticks)/1000 #calculate how many seconds
if seconds>10: # if more than 10 seconds close the game
break
print (seconds) #print how many seconds

In pygame exists a timer event. Use pygame.time.set_timer() to repeatedly create an USEREVENT. e.g.:
timer_interval = 500 # 0.5 seconds
timer_event = pygame.USEREVENT + 1
pygame.time.set_timer(timer_event , timer_interval)
Note, in pygame customer events can be defined. Each event needs a unique id. The ids for the user events have to be between pygame.USEREVENT (24) and pygame.NUMEVENTS (32). In this case pygame.USEREVENT+1 is the event id for the timer event.
To disable the timer for an event, set the milliseconds argument to 0.
Receive the event in the event loop:
running = True
while running:
for event in pygame.event.get():
if event.type == pygame.QUIT:
running = False
elif event.type == timer_event:
# [...]
The timer event can be stopped by passing 0 to the time parameter.
See the example:
import pygame
pygame.init()
window = pygame.display.set_mode((200, 200))
clock = pygame.time.Clock()
font = pygame.font.SysFont(None, 100)
counter = 10
text = font.render(str(counter), True, (0, 128, 0))
timer_event = pygame.USEREVENT+1
pygame.time.set_timer(timer_event, 1000)
run = True
while run:
clock.tick(60)
for event in pygame.event.get():
if event.type == pygame.QUIT:
run = False
elif event.type == timer_event:
counter -= 1
text = font.render(str(counter), True, (0, 128, 0))
if counter == 0:
pygame.time.set_timer(timer_event, 0)
window.fill((255, 255, 255))
text_rect = text.get_rect(center = window.get_rect().center)
window.blit(text, text_rect)
pygame.display.flip()

pygame.time.Clock.tick returns the time in milliseconds since the last clock.tick call (delta time, dt), so you can use it to increase or decrease a timer variable.
import pygame as pg
def main():
pg.init()
screen = pg.display.set_mode((640, 480))
font = pg.font.Font(None, 40)
gray = pg.Color('gray19')
blue = pg.Color('dodgerblue')
# The clock is used to limit the frame rate
# and returns the time since last tick.
clock = pg.time.Clock()
timer = 10 # Decrease this to count down.
dt = 0 # Delta time (time since last tick).
done = False
while not done:
for event in pg.event.get():
if event.type == pg.QUIT:
done = True
timer -= dt
if timer <= 0:
timer = 10 # Reset it to 10 or do something else.
screen.fill(gray)
txt = font.render(str(round(timer, 2)), True, blue)
screen.blit(txt, (70, 70))
pg.display.flip()
dt = clock.tick(30) / 1000 # / 1000 to convert to seconds.
if __name__ == '__main__':
main()
pg.quit()

There are several ways you can do this- here's one. Python doesn't have a mechanism for interrupts as far as I know.
import time, datetime
timer_stop = datetime.datetime.utcnow() +datetime.timedelta(seconds=10)
while True:
if datetime.datetime.utcnow() > timer_stop:
print "timer complete"
break

There are many ways to do this and it is one of them
import pygame,time, sys
from pygame.locals import*
pygame.init()
screen_size = (400,400)
screen = pygame.display.set_mode(screen_size)
pygame.display.set_caption("timer")
time_left = 90 #duration of the timer in seconds
crashed = False
font = pygame.font.SysFont("Somic Sans MS", 30)
color = (255, 255, 255)
while not crashed:
for event in pygame.event.get():
if event.type == QUIT:
crashed = True
total_mins = time_left//60 # minutes left
total_sec = time_left-(60*(total_mins)) #seconds left
time_left -= 1
if time_left > -1:
text = font.render(("Time left: "+str(total_mins)+":"+str(total_sec)), True, color)
screen.blit(text, (200, 200))
pygame.display.flip()
screen.fill((20,20,20))
time.sleep(1)#making the time interval of the loop 1sec
else:
text = font.render("Time Over!!", True, color)
screen.blit(text, (200, 200))
pygame.display.flip()
screen.fill((20,20,20))
pygame.quit()
sys.exit()

This is actually quite simple. Thank Pygame for creating a simple library!
import pygame
x=0
while x < 10:
x+=1
pygame.time.delay(1000)
That's all there is to it! Have fun with pygame!

Another way to do it is to set up a new USEREVENT for a tick, set the time interval for it, then put the event into your game loop
'''
import pygame
from pygame.locals import *
import sys
pygame.init()
#just making a window to be easy to kill the program here
display = pygame.display.set_mode((300, 300))
pygame.display.set_caption("tick tock")
#set tick timer
tick = pygame.USEREVENT
pygame.time.set_timer(tick,1000)
while 1:
for event in pygame.event.get():
if event.type == QUIT:
pygame.quit()
sys.exit()
if event.type == pygame.USEREVENT:
if event.type == tick:
## do whatever you want when the tick happens
print('My tick happened')

Countdown timer in Pygame

I started using pygame and I want to do simple game. One of the elements which I need is countdown timer.
How can I do the countdown time (eg 10 seconds) in PyGame?

Another easy way is to simply use pygame's event system.
Here's a simple example:
import pygame
pygame.init()
screen = pygame.display.set_mode((128, 128))
clock = pygame.time.Clock()
counter, text = 10, '10'.rjust(3)
pygame.time.set_timer(pygame.USEREVENT, 1000)
font = pygame.font.SysFont('Consolas', 30)
run = True
while run:
for e in pygame.event.get():
if e.type == pygame.USEREVENT:
counter -= 1
text = str(counter).rjust(3) if counter > 0 else 'boom!'
if e.type == pygame.QUIT:
run = False
screen.fill((255, 255, 255))
screen.blit(font.render(text, True, (0, 0, 0)), (32, 48))
pygame.display.flip()
clock.tick(60)

On this page you will find what you are looking for http://www.pygame.org/docs/ref/time.html#pygame.time.get_ticks
You download ticks once before beginning the countdown (which can be a trigger in the game - the key event, whatever).
For example:
start_ticks=pygame.time.get_ticks() #starter tick
while mainloop: # mainloop
seconds=(pygame.time.get_ticks()-start_ticks)/1000 #calculate how many seconds
if seconds>10: # if more than 10 seconds close the game
break
print (seconds) #print how many seconds

In pygame exists a timer event. Use pygame.time.set_timer() to repeatedly create an USEREVENT. e.g.:
timer_interval = 500 # 0.5 seconds
timer_event = pygame.USEREVENT + 1
pygame.time.set_timer(timer_event , timer_interval)
Note, in pygame customer events can be defined. Each event needs a unique id. The ids for the user events have to be between pygame.USEREVENT (24) and pygame.NUMEVENTS (32). In this case pygame.USEREVENT+1 is the event id for the timer event.
To disable the timer for an event, set the milliseconds argument to 0.
Receive the event in the event loop:
running = True
while running:
for event in pygame.event.get():
if event.type == pygame.QUIT:
running = False
elif event.type == timer_event:
# [...]
The timer event can be stopped by passing 0 to the time parameter.
See the example:
import pygame
pygame.init()
window = pygame.display.set_mode((200, 200))
clock = pygame.time.Clock()
font = pygame.font.SysFont(None, 100)
counter = 10
text = font.render(str(counter), True, (0, 128, 0))
timer_event = pygame.USEREVENT+1
pygame.time.set_timer(timer_event, 1000)
run = True
while run:
clock.tick(60)
for event in pygame.event.get():
if event.type == pygame.QUIT:
run = False
elif event.type == timer_event:
counter -= 1
text = font.render(str(counter), True, (0, 128, 0))
if counter == 0:
pygame.time.set_timer(timer_event, 0)
window.fill((255, 255, 255))
text_rect = text.get_rect(center = window.get_rect().center)
window.blit(text, text_rect)
pygame.display.flip()

pygame.time.Clock.tick returns the time in milliseconds since the last clock.tick call (delta time, dt), so you can use it to increase or decrease a timer variable.
import pygame as pg
def main():
pg.init()
screen = pg.display.set_mode((640, 480))
font = pg.font.Font(None, 40)
gray = pg.Color('gray19')
blue = pg.Color('dodgerblue')
# The clock is used to limit the frame rate
# and returns the time since last tick.
clock = pg.time.Clock()
timer = 10 # Decrease this to count down.
dt = 0 # Delta time (time since last tick).
done = False
while not done:
for event in pg.event.get():
if event.type == pg.QUIT:
done = True
timer -= dt
if timer <= 0:
timer = 10 # Reset it to 10 or do something else.
screen.fill(gray)
txt = font.render(str(round(timer, 2)), True, blue)
screen.blit(txt, (70, 70))
pg.display.flip()
dt = clock.tick(30) / 1000 # / 1000 to convert to seconds.
if __name__ == '__main__':
main()
pg.quit()

There are several ways you can do this- here's one. Python doesn't have a mechanism for interrupts as far as I know.
import time, datetime
timer_stop = datetime.datetime.utcnow() +datetime.timedelta(seconds=10)
while True:
if datetime.datetime.utcnow() > timer_stop:
print "timer complete"
break

There are many ways to do this and it is one of them
import pygame,time, sys
from pygame.locals import*
pygame.init()
screen_size = (400,400)
screen = pygame.display.set_mode(screen_size)
pygame.display.set_caption("timer")
time_left = 90 #duration of the timer in seconds
crashed = False
font = pygame.font.SysFont("Somic Sans MS", 30)
color = (255, 255, 255)
while not crashed:
for event in pygame.event.get():
if event.type == QUIT:
crashed = True
total_mins = time_left//60 # minutes left
total_sec = time_left-(60*(total_mins)) #seconds left
time_left -= 1
if time_left > -1:
text = font.render(("Time left: "+str(total_mins)+":"+str(total_sec)), True, color)
screen.blit(text, (200, 200))
pygame.display.flip()
screen.fill((20,20,20))
time.sleep(1)#making the time interval of the loop 1sec
else:
text = font.render("Time Over!!", True, color)
screen.blit(text, (200, 200))
pygame.display.flip()
screen.fill((20,20,20))
pygame.quit()
sys.exit()

This is actually quite simple. Thank Pygame for creating a simple library!
import pygame
x=0
while x < 10:
x+=1
pygame.time.delay(1000)
That's all there is to it! Have fun with pygame!

Another way to do it is to set up a new USEREVENT for a tick, set the time interval for it, then put the event into your game loop
'''
import pygame
from pygame.locals import *
import sys
pygame.init()
#just making a window to be easy to kill the program here
display = pygame.display.set_mode((300, 300))
pygame.display.set_caption("tick tock")
#set tick timer
tick = pygame.USEREVENT
pygame.time.set_timer(tick,1000)
while 1:
for event in pygame.event.get():
if event.type == QUIT:
pygame.quit()
sys.exit()
if event.type == pygame.USEREVENT:
if event.type == tick:
## do whatever you want when the tick happens
print('My tick happened')