如何让小球撞到砖块后反弹回来？

Question

我正在制作 Breakout 的克隆版。我已经制作了球和砖块，让球撞击砖块，但是当球和块碰撞时，球穿过而不是弹回。我应该怎么办？抱歉没有评论，我对此很陌生。

import pygame
from pygame.locals import QUIT
from pygame.locals import Rect
import math
pygame.init()
SURFACE = pygame.display.set_mode((400,300))
pygame.display.set_caption("Game Window")
FPSCLOCK = pygame.time.Clock()
class Block:
    def __init__(self, color, rect):
        self.color = color
        self.rect = rect
    def draw(self):
        pygame.draw.rect(SURFACE, self.color, self.rect)
    def delete(self):
        blocks.remove(block)
class Ball:
    def __init__(self,a,b,c,d):
        self.color=a
        self.rect=b
        self.dir=c
        self.speed=d
    def draw(self):
        pygame.draw.ellipse(SURFACE, ball_color, ball_rect)
    def move(self):
        ball_rect.centerx += math.cos(math.radians(self.dir))*self.speed
        ball_rect.centery -= math.sin(math.radians(self.dir))*self.speed
        if ball_rect.centerx <=0 or ball_rect.centerx >= 400:
            self.dir = 180 - self.dir
        if ball_rect.centery <= 0 or ball_rect.centery >= 300:
            self.dir = -self.dir
left=6
top=30
width=45
height=20
color=(200,50,200)
blocks = []
for i in range(4):
    for j in range(8):
        rect = Rect(left, top, width, height)
        blocks.append(Block(color, rect))
        left += 49
    left = 6
    top += 24
ball_rect = Rect(150,100,10,10)
ball_color = (255,255,0)
ball = Ball(ball_color, ball_rect, 60, 5)
num=0
while True:
    SURFACE.fill((0,0,0))
    for event in pygame.event.get():
        if event.type == QUIT:
            pygame.quit()
            sys.exit()
    for block in blocks:
        block.draw()
    ball.draw()
    ball.move()
    for block in blocks:
        if ball.rect.colliderect(block.rect)==True:
            Block.delete(blocks)
            print("{}回目の衝突".format(num))
            num += 1
    pygame.display.update()
    FPSCLOCK.tick(60)

Answer 1

如果你想让小球弹起来，那就加个新方法-

def bounce(self):
    self.dir -= 180

它会将球反弹回来。注意：这可能会出现故障，并且可能不会朝着正确的方向发展。尝试改变角度并添加条件以使其完美。

然后添加这个-

 if ball.rect.colliderect(block.rect)==True:
    Block.delete(blocks)
    ball.bounce()
    print("{}回目の衝突".format(num))
    num += 1

如何让小球撞到砖块后反弹回来？

How to make the ball bounce back after hitting the brick?

python

pygame