This question already has an answer here:
How do I continuously trigger an action at certain time intervals? Enemy shoots constant beam instead of bullets in pygame [duplicate]
(1 answer)
Closed 2 years ago.
So I wrote my code and everything works how I want it to for now.
The only problem is that my bullet or fireball teleports to the location I set it to.
I am wondering if there is a way to make it look like its actually moving towards the destination using pygame and whatnot.
Thanks a ton!
(width, height) = (1300,800)
screen = pygame.display.set_mode((width, height))
playerImage = pygame.image.load('player.png')
fireballImage = pygame.image.load('fireball.png')
pygame.display.set_caption('Game')
transparent = (0, 0, 0, 0)
#Fireball stats
def player(x ,y):
screen.blit(playerImage, (x, y))
pygame.display.flip()
def fireball(x, y):
screen.blit(fireballImage, (fb_x,fb_y))
pygame.display.flip()
fireball_state = "ready"
print('created')
fb_x = x = width * 0.45
fb_y = y = height * 0.8
x_change = 0
y_change = 0
fb_x_change = 0
fb_y_change = 0
pressed = pygame.key.get_pressed()
#mainloop
running = True
while running:
for event in pygame.event.get():
if event.type == pygame.QUIT:
running = False
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_d:
x_change = 1
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_a:
x_change = -1
if event.type == pygame.KEYUP:
if event.key == pygame.K_a or event.key == pygame.K_d:
x_change = 0
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_w:
y_change = -2
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_s:
y_change = 2
if event.type == pygame.KEYUP:
if event.key == pygame.K_w or event.key == pygame.K_s:
y_change = 0
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_SPACE:
fb_y_change = -400
if event.type == pygame.KEYUP:
if event.key == pygame.K_SPACE:
fb_y_change = 0
x += x_change
y += y_change
fireball(x,y)
fb_x = x
fb_y = y
screen.fill((255,255,255))
player(x,y)
fb_x += fb_x_change
fb_y += fb_y_change
fireball(fb_x,fb_y)
pygame.display.update()
First of all remove pygame.display.flip() from player and fireball. That casuse flickering. A single pygame.display.update() at the end of the application loop is sufficient.
Note, the fireballs have to be blit at (x, y) rather than (fb_x, fb_y)
def player(x ,y):
screen.blit(playerImage, (x, y))
def fireball(x, y):
screen.blit(fireballImage, (x, y))
fireball_state = "ready"
Further more use pygame.time.Clock() / tick() to control the flops per second (FPS):
clock = pygame.time.Clock()
#mainloop
running = True
while running:
clock.tick(FPS)
Add a list for the fire balls:
fireballs = []
Spawn a new fireball when space is pressed:
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_SPACE:
fireballs.append([x, y, 0, -2])
Update and draw the fireballs in a loop:
for fb in fireballs:
fb[0] += fb[2]
fb[1] += fb[3]
for fb in fireballs:
fireball(fb[0],fb[1])
See the example:
fireballs = []
FPS = 60
clock = pygame.time.Clock()
running = True
while running:
clock.tick(FPS)
for event in pygame.event.get():
if event.type == pygame.QUIT:
running = False
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_SPACE:
fireballs.append([x, y, 0, -2])
pressed = pygame.key.get_pressed()
if pressed[pygame.K_w]:
y -= 2
if pressed[pygame.K_s]:
y += 2
if pressed[pygame.K_a]:
x -= 2
if pressed[pygame.K_d]:
x += 2
for i in range(len(fireballs)-1, -1, -1):
fb = fireballs[i]
fb[0] += fb[2]
fb[1] += fb[3]
if fb[1] < 0:
del fireballs[i]
screen.fill((255,255,255))
player(x,y)
for fb in fireballs:
fireball(fb[0],fb[1])
pygame.display.update()
Related
I'm currently trying to build a game through vscode using pygame lib.
My code to move character around with keyboard arrow keys won't apply to my module.
My module won't close even though I click exit button or esc.
Any thoughts why its not working?
import pygame
import os
pygame.init()
screen_width = 480
screen_height = 640
screen = pygame.display.set_mode((screen_width,screen_height))
pygame.display.set_caption("June's Game")
background = pygame.image.load("D:/Python/pygame_basic/background.png")
character = pygame.image.load("D:/Python/pygame_basic/character.png")
character_size = character.get_rect().size
character_width = character_size[0]
character_height = character_size[1]
character_x_position = (screen_width / 2) - (character_width / 2)
character_y_position = screen_height - character_height
to_x = 0
to_y = 0
running = True #게임이 진행중인가
while running:
for event in pygame.event.get():
if event == pygame.QUIT:
running = False
if event == pygame.KEYDOWN:
if event.key == pygame.K_LEFT:
to_x -= 5
elif event.key == pygame.K_RIGHT:
to_x += 5
elif event.key == pygame.K_UP:
to_y -= 5
elif event.key == pygame.K_DOWN:
to_y += 5
if event == pygame.KEYUP:
if event.key == pygame.K_LEFT or event.key == pygame.K_RIGHT:
to_x = 0
elif event.key == pygame.K_UP or event.key == pygame.K_DOWN:
to_y = 0
character_x_position += to_x
character_y_position += to_y
#screen.fill((0,0,255))
screen.blit(background, (0,0))
screen.blit(character, (character_x_position,character_y_position))
pygame.display.update()
pygame.quit()
i coudln't get it to work
event is an object. You have to get the type of the event, e.g.:
if event == pygame.KEYDOWN
if event.type == pygame.KEYDOWN:
You have to limit the frames per second to limit CPU usage with pygame.time.Clock.tick and to control the speed of the game. Otherwise, the player moves much too fast and immediately disappears from the screen. The method tick() of a pygame.time.Clock object, delays the game in that way, that every iteration of the loop consumes the same period of time.
clock = pygame.time.Clock()
running = True
while running:
clock.tick(100)
for event in pygame.event.get():
if event.type == pygame.QUIT:
running = False
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_LEFT:
to_x -= 5
elif event.key == pygame.K_RIGHT:
to_x += 5
elif event.key == pygame.K_UP:
to_y -= 5
elif event.key == pygame.K_DOWN:
to_y += 5
if event.type == pygame.KEYUP:
if event.key == pygame.K_LEFT or event.key == pygame.K_RIGHT:
to_x = 0
elif event.key == pygame.K_UP or event.key == pygame.K_DOWN:
to_y = 0
character_x_position += to_x
character_y_position += to_y
#screen.fill((0,0,255))
screen.blit(background, (0,0))
screen.blit(character, (character_x_position,character_y_position))
pygame.display.update()
However, there is a better method to move an object when a key is held down (See How can I make a sprite move when key is held down):
to_x = 0
to_y = 0
speed = 5
clock = pygame.time.Clock()
running = True
while running:
clock.tick(100)
for event in pygame.event.get():
if event.type == pygame.QUIT:
running = False
keys = pygame.key.get_pressed()
to_x = (keys[pygame.K_RIGHT] - keys[pygame.K_LEFT]) * speed
to_y = (keys[pygame.K_DOWN] - keys[pygame.K_UP]) * speed
character_x_position += to_x
character_y_position += to_y
screen.blit(background, (0,0))
screen.blit(character, (character_x_position,character_y_position))
pygame.display.update()
This question already has answers here:
How to get keyboard input in pygame?
(11 answers)
How can I make a sprite move when key is held down
(6 answers)
Closed 2 years ago.
I asked previously about my code I am doing for my a level coursework and I was able to fix one problem but a solution offered for me not being able to move my sprites I could not fix. I copied out this code but it still didn't work, I have highlighted this section between **
My screen loads the home screen function but when the game loop runs it loads the base but doesn't do any more.
import pygame
import random
import time
#define variables
WIDTH = 1080
HEIGHT =720
FPS = 30
x1 = WIDTH/2.25
y1 = HEIGHT/2.5
x2 = WIDTH/20
y2 = HEIGHT/2.5
xbut = 475
ybut1 = 300
ybut2 = 400
gameTitle = 'Hungry Ghosts'
xChange1 = 0
yChange1 = 0
xChange2 = 0
yChange2 = 0
running = True
#define colours
WHITE = (255,255,255)
BLACK = (0,0,0)
MEGAN = (123,57,202)
MOLLIE = (244,11,12)
KATIE = (164,12,69)
#initialise pygame and window
pygame.init()
pygame.mixer.init()
pygame.font.init()
screen =pygame.display.set_mode((WIDTH,HEIGHT))
pygame.display.set_caption('Hungry Ghosts')
clock = pygame.time.Clock()
#load immages
home_image = pygame.image.load(('homescreen.jpg'))
game_image = pygame.image.load(('gamescreen.jpg'))
player1_image = pygame.image.load(('player 1.png')).convert_alpha()
player2_image = pygame.image.load(('player 2.png')).convert_alpha()
position = (0,0)
screen.blit(home_image, position)
startBut = pygame.image.load('startbutton.jpg').convert()
instructionBut = pygame.image.load('instructionbutton.jpg').convert()
#define functions
def textObjects(gameTitle, font):
textSurface = font.render(gameTitle,True, WHITE)
pygame.display.update()
return textSurface, textSurface.get_rect()
def titleText(gameTitle):
textForTitle = pygame.font.Font('VCR_OSD_MONO_1.001.ttf',115)
TextSurf, TextRect = textObjects(gameTitle, textForTitle)
TextRect.center = ((WIDTH/2),(HEIGHT/6))
screen.blit(TextSurf,TextRect)
pygame.display.update()
def startButton(xbut,ybut1):
screen.blit(startBut,(xbut,ybut1))
pygame.display.update()
def instructionButton(xbut,ybut2):
screen.blit(instructionBut,(xbut,ybut2))
pygame.display.update()
def character1(x1,y1):
screen.blit(player1_image,(x1,y1))
def character2(x,y):
screen.blit(player2_image,(x,y))
def homeScreen():
global running
start = False
home = True
while running and not start:
clock.tick(FPS)
for event in pygame.event.get():
if event.type == pygame.QUIT:
running = False
if event.type == pygame.MOUSEBUTTONDOWN:
if startBut.get_rect(topleft = (xbut, ybut1)).collidepoint(event.pos) :
print('clicked on button')
start = True
titleText(gameTitle)
startButton(xbut,ybut1)
instructionButton(xbut,ybut2)
pygame.display.flip()
*******************************************************************
def gameLoop():
global running
global x1, y2, x2, y2, xChange1, yChange1, xChange2, yChange2
while running:
clock.tick(FPS)
for event in pygame.event.get():
if event.type == pygame.QUIT:
running = False
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_LEFT:
xChange = -5
elif event.key == pygame.K_RIGHT:
xChange = 5
if event.type == pygame.KEYUP:
if event.key == pygame.K_LEFT or event.key == pygame.K_RIGHT:
xChange = 0
x1 += xChange1
screen.blit(game_image,(0,0))
character1(x1,y1)
character2(x2,y2)
pygame.display.flip()
*********************************************************************
#movement
for event in pygame.event.get():
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_LEFT:
xChange1 = -5
elif event.key == pygame.K_RIGHT:
xChange1 = 5
if event.type == pygame.KEYUP:
if event.key == pygame.K_LEFT or event.key == pygame.K_RIGHT:
xChange1 = 0
x1 += xChange1
#calling functions
homeScreen()
gameLoop()
pygame.quit()
There is typo. The name of the variable is xChange1 rather than xChange. Furthermore read Faster version of pygame.event.get() and just implement 1 event loop:
def gameLoop():
global running
global x1, y1, x2, y2, xChange1, yChange1, xChange2, yChange2
while running:
clock.tick(FPS)
for event in pygame.event.get():
if event.type == pygame.QUIT:
running = False
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_LEFT:
xChange1 = -5
elif event.key == pygame.K_RIGHT:
xChange1 = 5
elif event.key == pygame.K_a:
xChange2 = -5
elif event.key == pygame.K_d:
xChange2 = 5
if event.type == pygame.KEYUP:
if event.key == pygame.K_LEFT or event.key == pygame.K_RIGHT:
xChange1 = 0
if event.key == pygame.K_a or event.key == pygame.K_d:
xChange2 = 0
x1 += xChange1
x2 += xChange2
screen.blit(game_image,(0,0))
character1(x1,y1)
character2(x2,y2)
pygame.display.flip()
#calling functions
homeScreen()
gameLoop()
pygame.quit()
However I recommend to use pygame.key.get_pressed() rather than the keyboard events.
The keyboard events (see pygame.event module) occur only once when the state of a key changes. The KEYDOWN event occurs once every time a key is pressed. KEYUP occurs once every time a key is released. Use the keyboard events for a single action or a step-by-step movement.
pygame.key.get_pressed() returns a list with the state of each key. If a key is held down, the state for the key is True, otherwise False. Use pygame.key.get_pressed() to evaluate the current state of a button and get continuous movement:
def gameLoop():
global running
global x1, y1, x2, y2
while running:
clock.tick(FPS)
for event in pygame.event.get():
if event.type == pygame.QUIT:
running = False
keys = pygame.key.get_pressed()
x1 += (keys[pygame.K_RIGHT] - keys[pygame.K_LEFT]) * 5
y1 += (keys[pygame.K_DOWN] - keys[pygame.K_UP]) * 5
x2 += (keys[pygame.K_d] - keys[pygame.K_a]) * 5
y2 += (keys[pygame.K_s] - keys[pygame.K_w]) * 5
screen.blit(game_image,(0,0))
character1(x1,y1)
character2(x2,y2)
pygame.display.flip()
#calling functions
homeScreen()
gameLoop()
pygame.quit()
I am coding a game for a school project. I have coded it so that I use wasd to move my character. I have four different images: one facing left, one right, one forwards, and one backwards. I need to change the image being displayed as the character based on which button I press. I have a function defining each image, and I try to call that function based on which button is pressed, and then when the button goes back up, I want to display the front facing image again. All it does is every time I press, the corresponding facing image is displayed, goes away, and then the front facing image is displayed and then goes away very quickly. This is just the part that actually deals with the character:
howieImg = pygame.image.load('howie front.PNG')
howieImg_back = pygame.image.load('howie back.PNG')
howieImg_left = pygame.image.load('howie left.PNG')
howieImg_right = pygame.image.load('howie right.PNG')
def howie(x, y):
gameDisplay.blit(howieImg, (x, y))
def howie_back(x, y):
gameDisplay.blit(howieImg_back, (x, y))
def howie_left(x, y):
gameDisplay.blit(howieImg_left, (x, y))
def howie_right(x, y):
gameDisplay.blit(howieImg_right, (x, y))
while not gameExit:
startx = (display_width/2)
starty = (display_height/2)
thing_width = 25
for event in pygame.event.get():
if event.type == pygame.QUIT:
pygame.quit()
quit()
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_w and y > 0:
howie_back(x, y)
y_change = -3
if event.key == pygame.K_s and y < display_height - character_height:
howie(x, y)
y_change = 3
if event.key == pygame.K_a and x > 0:
howie_left(x, y)
x_change = -3
if event.key == pygame.K_d and x < display_width - character_width:
howie_right(x, y)
x_change = 3
if event.type == pygame.KEYUP:
if event.key == pygame.K_w or event.key == pygame.K_s:
howie(x, y)
y_change = 0
if event.key == pygame.K_a or event.key == pygame.K_d:
howie(x, y)
x_change = 0
x += x_change
y += y_change
if x > display_width - character_width or x < 0:
x_change = 0
if y > display_height - character_height or y < 0:
y_change = 0
clock.tick(60)
gameDisplay.blit(background1Img, [0, 0])
button1()
howie(x, y)
things_collected(collected)
pygame.display.update()
I'd get rid of the functions and just store the current image in a variable (howieImg in the example below). When the user presses one of the keys, you can simply assign one of the other images to the current image variable.
import pygame
pygame.init()
gameDisplay = pygame.display.set_mode((800, 600))
# These are just replacement images that allowed me to test the code.
# howieImg_front = pygame.Surface((50, 50))
# howieImg_front.fill((0, 0, 255))
# howieImg_back = pygame.Surface((50, 50))
# howieImg_back.fill((255, 255, 0))
# howieImg_left = pygame.Surface((50, 50))
# howieImg_left.fill((255, 0, 0))
# howieImg_right = pygame.Surface((50, 50))
# howieImg_right.fill((0, 255, 0))
howieImg_front = pygame.image.load('howie front.PNG').convert_alpha()
howieImg_back = pygame.image.load('howie back.PNG').convert_alpha()
howieImg_left = pygame.image.load('howie left.PNG').convert_alpha()
howieImg_right = pygame.image.load('howie right.PNG').convert_alpha()
# Assign the current howie image to this variable.
howieImg = howieImg_front
x = 200
y = 300
x_change = 0
y_change = 0
clock = pygame.time.Clock()
gameExit = False
while not gameExit:
for event in pygame.event.get():
if event.type == pygame.QUIT:
gameExit = True
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_w:
howieImg = howieImg_back
y_change = -3
if event.key == pygame.K_s:
howieImg = howieImg_front
y_change = 3
if event.key == pygame.K_a:
howieImg = howieImg_left
x_change = -3
if event.key == pygame.K_d:
howieImg = howieImg_right
x_change = 3
if event.type == pygame.KEYUP:
if event.key == pygame.K_w or event.key == pygame.K_s:
howieImg = howieImg_front
y_change = 0
if event.key == pygame.K_a or event.key == pygame.K_d:
howieImg = howieImg_front
x_change = 0
x += x_change
y += y_change
gameDisplay.fill((30, 30, 30))
# Just blit the current `howieImg`.
gameDisplay.blit(howieImg, (x, y))
pygame.display.update()
clock.tick(60)
pygame.quit()
I am moving a sprite on the x-axis. It is properly moving left and right. When I press both LEFT and RIGHT at the same time it stop moving properly.
I am trying to make it when a user presses both keys and then lets go of one, for it to continue moving in the direction still pressed.
Weirdly it works while I holding right and letting go of left. It continues moving right.
When I hold left and tap right it stops moving until I press right again.
I commented out some ideas I had to make this work, but they failed me.
I am sure its a simple fix or a logic failure on my part.
I have worked a couple hours on this.
Thanks for responses ahead of time.
import pygame
import time
import random
import sys
import math
pygame.init()
displayWidth = 1200
displayHeight = 800
white = (255,255,255)
black = (0,0,0)
gameDisplay = pygame.display.set_mode((displayWidth, displayHeight))
pygame.display.set_caption('Game 3')
clock = pygame.time.Clock()
class firstSquare:
def __init__(self,player_x,player_y):
self.x = player_x
self.y = player_y
self.width = 100
self.height = 100
def render(self):
pygame.draw.rect(gameDisplay, white,(self.x, self.y, self.width, self.height))
class secondSquare:
def __init__(self,cpu_x,cpu_y):
self.x = cpu_x
self.y = cpu_y
self.width = 100
self.height = 100
def render(self):
pygame.draw.rect(gameDisplay, white,(self.x, self.y, self.width, self.height))
player = firstSquare(300,300)
cpu = secondSquare(100,100)
def gameLoop():
### variables##
player_x = 100
player_y = 100
x = 100
y = 100
movement_x = 0
movement_y = 0
frame_rate = 0
frame_table = 0
inGame = True
while inGame:
for event in pygame.event.get():
if event.type == pygame.QUIT:
inGame = False
pygame.quit()
sys.exit()
keyPressed= pygame.key.get_pressed()
#### this is moving the player on x-axis##
if keyPressed[pygame.K_LEFT]:
movement_x = -5
if event.type == pygame.KEYUP:
if event.key == pygame.K_LEFT:
movement_x = 0
if keyPressed[pygame.K_RIGHT]:
movement_x = 5
if event.type == pygame.KEYUP:
if event.key == pygame.K_RIGHT:
movement_x = 0
### two keys at once won't move the player###
if keyPressed[pygame.K_LEFT] and keyPressed[pygame.K_RIGHT]:
movement_x = 0
### pressing one key and letting go the other will continue movement
## if keyPressed[pygame.K_LEFT] and keyPressed[pygame.K_RIGHT]:
## if event.type == pygame.KEYUP:
## if event.key == pygame.K_LEFT:
## movement_x = 5
## print("left dropped")
## if keyPressed[pygame.K_RIGHT] and keyPressed[pygame.K_LEFT]:
## if event.type == pygame.KEYUP:
## if event.key == pygame.K_RIGHT:
## movement_x = -5
## print("Right dropped")
gameDisplay.fill(black)
player.render()
cpu.render()
player.x += movement_x
pygame.display.update()
clock.tick(60)
gameLoop()
pygame.quit()
quit()
I think what you need is this:
if keyPressed[pygame.K_LEFT]:
movement_x = -5
if event.type == pygame.KEYUP:
if event.key == pygame.K_LEFT and movement_x < 0:
movement_x = 0
if keyPressed[pygame.K_RIGHT]:
movement_x = 5
if event.type == pygame.KEYUP:
if event.key == pygame.K_RIGHT and movement_x > 0:
movement_x = 0
And that would be it... Hope it helps.
Try to use the following code in your movement:
if keyPressed[pygame.K_LEFT]:
movement_x = -5
elif keyPressed[pygame.K_RIGHT]:
movement_x = +5
elif event.type == pygame.KEYUP:
if event.key == pygame.K_LEFT:
movement_x = 0
elif event.type == pygame.KEYUP:
if event.key == pygame.K_RIGHT:
movement_x = 0
This is the code I used.
import pygame, sys
from pygame.locals import *
pygame.init()
def game():
width, height = 1000, 600
screen = pygame.display.set_mode((width,height))
pygame.display.set_caption('My game far now :P') #This command allows you make a title.
background=pygame.image.load('AE.jpg')
background = pygame.transform.scale(background, (width,height))
screen.blit(background, (0,0))
#Load target image and player
player = pygame.image.load('little.png')
player = pygame.transform.scale(player, (40,40))
px,py = width/2,height/2
screen.blit(player, (px,py))
movex = movey = 0
#Running of the game loop
while True:
screen.blit(background, (0,0))
#screen.blit(target,targetpos)
screen.blit(player, (px,py))
pygame.display.update()
#keyboard an/or mouse movements
for event in pygame.event.get():
if event.type == pygame.QUIT:
pygame.quit()
elif event.type == pygame.KEYDOWN:
if event.key == K_RIGHT:
movex = 2
if event.key == K_LEFT:
movex = -2
if event.key == K_UP:
movey = -2
if event.key == K_DOWN:
movey = 2
elif event.type == pygame.KEYUP:
if event.key == K_RIGHT:
movex = 0
if event.key == K_LEFT:
movex = 0
if event.key == K_UP:
movey = 0
if event.key == K_DOWN:
movey = 0
px = px + movex
py = py + movey
#Python 's way of running the main routine
if __name__=='__main__':
game()
When I run the program it all starts right, the screen opens with background and player spawning in the middle of the screen, but when I try to move nothing happends, no errors nothing.
Would apriciate any help I can get :)
Thx for taking time to help me.
You seem to have code indentation problem in last two lines which may be causing the bug.
Your curent code is equivalent to this if code block:
elif event.type == pygame.KEYUP:
if event.key == K_RIGHT:
movex = 0
if event.key == K_LEFT:
movex = 0
if event.key == K_UP:
movey = 0
if event.key == K_DOWN # IF BLOCK STARTS
movey = 0
px = px + movex # THIS FALLS IN THE PREVIOUS IF BLOCK
py = py + movey
Correct code would be :
elif event.type == pygame.KEYUP:
if event.key == K_RIGHT:
movex = 0
if event.key == K_LEFT:
movex = 0
if event.key == K_UP:
movey = 0
if event.key == K_DOWN # IF BLOCK STARTS
movey = 0 #IF BLOCK ENDS
px = px + movex # NOW THIS IS OUT OF THE IF BLOCK
py = py + movey
Take this code, the movement is optimized. Useles code removed.
I hope you understand it ;)
import pygame, sys
from pygame.locals import *
pygame.init()
width, height = 1000, 600
screen = pygame.display.set_mode((width,height))
pygame.display.set_caption('My game far now :P')
background=pygame.image.load('AE.png')
background = pygame.transform.scale(background, (width,height))
player = pygame.image.load('little.png')
player = pygame.transform.scale(player, (40,40))
px,py = width/2,height/2
movex = movey = 0
while True:
for event in pygame.event.get():
if event.type == pygame.QUIT:
pygame.quit()
keys = pygame.key.get_pressed()
if keys[pygame.K_LEFT]: px -= 2
if keys[pygame.K_RIGHT]: px += 2
if keys[pygame.K_UP]: py -= 2
if keys[pygame.K_DOWN]: py += 2
screen.blit(background, (0,0))
screen.blit(player, (px,py))
pygame.display.update()
Two problems.
You don't render in your loop
You are updating the location only in the if statement.
fixed:
while True:
# input
for event in pygame.event.get():
if event.type == pygame.QUIT:
pygame.quit()
elif event.type == pygame.KEYDOWN:
# ...snip...
# physics
px += movex
py += movey
# drawing
screen.blit(background, (0,0))
screen.blit(player, (px,py))
pygame.display.update()