使用Pygame和Pymunk Circle不会在太空中繁殖

Question

所以，我试图制作一个函数create_particle，然后让函数用draw_circle绘制一个分部。然而，每当我打开窗口时，我都会看到灰色窗口，但没有显示粒子。我对pygame和pymunk都非常陌生，所以我们非常感谢您的帮助。

import sys, pygame, random, pymunk
BG = (94, 93, 93)
S_width = 800
S_height = 800
pygame.init()
Window = pygame.display.set_mode((S_width,S_height))
clock = pygame.time.Clock()
pygame.display.set_caption("H20 Particle simulation")
Window.fill(BG)
space = pymunk.Space()
space.gravity = (0,100)
def create_particle(space):
body = pymunk.Body(1, 100, body_type = pymunk.Body.DYNAMIC)
body.position = (400, 400)
shape = pymunk.Circle(body,80)
space.add(body, shape)
return shape
def draw_circle(circle):
for circle in circles:
pos_x = int(circle.body.position.x)
pos_y = int(circle.body.position.y)
pygame.draw.circle(screen,(0,0,0),circle.body.position20)
circles = []
circles.append(create_particle(space))

while True:
Window.fill((217,217,217))
clock.tick(120)
pygame.display.update()
for event in pygame.event.get():
if event.type == pygame.QUIT:
pygame.quit()
sys.exit()

Answer 1

需要进行一些更改：

• draw_circle()不需要参数
• 绘制圆时，需要指定坐标和半径
• 在主循环中，调用draw_circle()和space.step(0.02)

这是更新后的代码：

def draw_circle():
for circle in circles:
pos_x = int(circle.body.position.x)
pos_y = int(circle.body.position.y)
pygame.draw.circle(Window,(0,200,0), (pos_x, pos_y), 20)
circles = []
circles.append(create_particle(space))
while True:
Window.fill((217,217,217))
draw_circle()
space.step(0.02)
clock.tick(120)
for event in pygame.event.get():
if event.type == pygame.QUIT:
pygame.quit()
sys.exit() 
pygame.display.update()