Rotating a sprite with pygame
Posted: Tue Nov 18, 2014 7:11 pm
Hi, I've just started using Python/Pygame as a hobby. I've gotten the code to draw my Plane.png and move it using the wsad keys, and I mapped the q and e keys to rotate it which it does, but each time it rotates, it 'falls' down the screen to the bottom right and after a few key presses, disappears. I read that this is because when it turns the sprite, it adds padding to resize the image while it is turning. I think that each time it turns, it adds more padding, making it add exponentially for each keypress. I can't figure out how to stop this from happening. Any help for a beginner greatly appreciated! The Colours import is just a file where I keep my pre-defined colours for easier colour filling, and Plane.gif is an inch by inch and a half gif of a black plane with transparent background, and loads no problem, it just flies away when i use the e or q keys
This is the code, hope you can help, thanks!
Code: Select all
import pygame, sys, time, random
from pygame.locals import *
from Colours import *
from PIL import Image, ImageDraw
class MySprite(pygame.sprite.Sprite):
def __init__(self):
pygame.sprite.Sprite.__init__(self)
self.image = pygame.image.load('Plane.gif').convert()
self.rect = self.image.get_rect()
self.x = 0
self.y = 0
def draw(self,surface):
surface.blit(self.image,(self.x,self.y))
def onKeyPress(self):
key = pygame.key.get_pressed()
distance = 5
if key[ord('s')] or key[pygame.K_DOWN]: #down
self.y += distance
elif key[ord('w')] or key[pygame.K_UP]: #up
self.y -= distance
if key[ord('d')] or key[pygame.K_RIGHT]: #right
self.x += distance
elif key[ord('a')] or key[pygame.K_LEFT]: #left
self.x -= distance
rotate = pygame.transform.rotate
if key[ord('e')]:
self.image = rotate(self.image, 10)
elif key[ord('q')]:
self.image = rotate(self.image, -10)
class Event(object):
def __init__(self):
for event in pygame.event.get():
if event.type == pygame.QUIT:
pygame.quit()
sys.exit()
elif event.type == pygame.KEYDOWN:
if event.key == pygame.K_ESCAPE:
pygame.quit()
sys.exit()
pygame.init()
fps = 30
fpsClock = pygame.time.Clock()
size = width,height = 800,600
screen = pygame.display.set_mode(size)
mySprite = MySprite()
while True:
event = Event()
screen.fill(Blue)
mySprite.draw(screen)
mySprite.onKeyPress()
pygame.display.update()
fpsClock.tick(fps)