python - 如何移动一个矩形及其关联的绘图(Pygame)？

Question

最小工作示例:

x = pygame.draw.circle(screen, color, (x, y), radius, width)
x.center = (my_wanted_center_x, my_wanted_center_y)

更新显示后，它始终显示在其原始位置。也尝试过其他数字。 x.move() 也不起作用。如何以最简单的方式移动任何绘制的图形？

Answer 1

您可以使用 pygame.Rect要存储对象的位置，请在 while 循环中更新矩形的属性(例如 .x 或 .center)，然后在rect.center 位置。

import pygame as pg

pg.init()

screen = pg.display.set_mode((640, 480))
clock = pg.time.Clock()
BG_COLOR = pg.Color('gray12')
SIENNA = pg.Color('sienna1')
radius = 20
# This rect serves as the position of the circle and
# can be used for collision detection.
rect = pg.Rect(50, 200, radius, radius)

done = False
while not done:
    for event in pg.event.get():
        if event.type == pg.QUIT:
            done = True

    rect.x += 1  # Update the position of the rect.

    screen.fill(BG_COLOR)
    # Now draw the circle at the center of the rect.
    pg.draw.circle(screen, SIENNA, rect.center, radius)
    pg.display.flip()
    clock.tick(30)

pg.quit()