Question

我使用pygame遇到了python程序的问题。我想让太阳系中的太阳旋转（旋转）。它部分工作：在运行程序时出现一些奇怪的“断断续续”的太阳问题。这种口吃在一个循环中一次又一次地发生。下面是代码：“

# -*- coding: utf-8 -*-

import pygame as pg
import pygame.locals as local
import sys

def rot_center(image, angle):
    """rotate an image while keeping its center and size"""
    orig_rect = image.get_rect()
    rot_image = pg.transform.rotate(image, angle)
    rot_rect = orig_rect.copy()
    rot_rect.center = rot_image.get_rect().center
    rot_image = rot_image.subsurface(rot_rect).copy()
    return rot_image

pg.init()

#deklaration
xres=0
yres=0

#auflösungseinstellungen

try:
    xres=int(sys.argv[1]) #auflösung von der kommandozeile, parameter 1
    yres=int(sys.argv[2]) #auflösung von der kammondozeile, parameter 2

except IndexError:
    xres=800
    yres=600

screen = pg.display.set_mode((xres,yres)) #coords nicht hart coden, variablen nutzen
pg.display.set_caption("future rpg prepreprepalphawhatever")

pg.mouse.set_visible(1)
pg.key.set_repeat(1,30)

clock = pg.time.Clock()


running = 1
rotation_stat = 0.0

while running:
    planet01 = pg.image.load("grafik/menu/planet02.png")
    planet01.set_colorkey((251,0,250), local.RLEACCEL) #load planet01
    sun = pg.image.load("grafik/menu/sun.png") #load sun
    bg = pg.image.load("grafik/menu/bg.png") #load background

    #den hintergrund skalieren, falls auflösung zu hoch
    sizedbg = pg.transform.smoothscale(bg, (xres, yres))

    rotation_stat += 1
    clock.tick(30)
    screen.fill((0,0,0))
    screen.blit(sizedbg, (0,0))
    screen.blit(planet01, (xres/5-planet01.get_width()/2,yres/2-planet01.get_height()/2))

    orig_rect = sun.get_rect()
    sun = pg.transform.rotate(sun, rotation_stat)
    screen.blit(sun, (xres/2-sun.get_width()/2,yres/2-sun.get_height()/2))
    rot_rect = orig_rect.copy()
    rot_rect.center = sun.get_rect().center
    sun = sun.subsurface(rot_rect).copy()


    for event in pg.event.get():
        if event.type == local.QUIT:
            running = 0
        if event.type == local.KEYDOWN:
            if event.key == local.K_ESCAPE:
                pg.event.post(pg.event.Event(local.QUIT))

    pg.display.flip()

Answer 1

将用于加载图像的代码放在循环之外

Answer 2

我不完全确定，但似乎每次循环运行时都会加载图像，这对CPU来说是非常密集的

Answer 3

我根据你的评论改写了我的答案，并在浏览了pygame文档后

你真的只需要加载一次图像。我在这里做的总是使用递增旋转将原始加载的太阳旋转到新表面。旋转总是回绕到0度。至于抖动，我确信这与锯齿伪像相关，甚至可能是你的居中数学。但我的目标是解决每一帧（每秒30次）从磁盘读取太阳图像的最大性能影响

import pygame as pg
import pygame.locals as local
import sys

def main():
    pg.init()

    xres=800
    yres=600

    try:
        xres=int(sys.argv[1]) 
        yres=int(sys.argv[2]) 

    except IndexError:
        pass

    screen = pg.display.set_mode((xres,yres)) 
    pg.display.set_caption("future rpg prepreprepalphawhatever")

    pg.mouse.set_visible(1)
    pg.key.set_repeat(1,30)

    clock = pg.time.Clock()

    rotation_stat = 0.0

    planet01 = pg.image.load("earth.png")
    planet01.set_colorkey((251,0,250), local.RLEACCEL) #load planet01

    sun = pg.image.load("sun.png") #load sun
    bg = pg.image.load("bg.png") #load background

    sizedbg = pg.transform.smoothscale(bg, (xres, yres))

    planet_pos = (xres/5-planet01.get_width()/2,yres/2-planet01.get_height()/2)

    running = 1

    xres_cent, yres_cent = xres/2, yres/2

    while running:

        clock.tick(30)

        for event in pg.event.get():
            if event.type == local.QUIT:
                running = 0
            if event.type == local.KEYDOWN:
                if event.key == local.K_ESCAPE:
                    pg.event.post(pg.event.Event(local.QUIT))

        rotation_stat += 1
        if rotation_stat % 360 == 0:
            rotation_stat = 0.0

        screen.blit(sizedbg, (0,0))
        screen.blit(planet01, planet_pos)

        sun_rect = sun.get_rect()
        sun_rotated = pg.transform.rotate(sun, rotation_stat)

        center = sun_rotated.get_rect().center
        sun_pos = (xres_cent-center[0], yres_cent-center[1])
        screen.blit(sun_rotated, sun_pos)

        pg.display.flip()

    pg.quit()


if __name__ == "__main__":
    main()

Pygame口吃对象

3 个答案: