python - Pygame 弹雨碰撞和残像

Question

我正在制作一个简单的游戏，其中有一个敌​​人，你可以射击，并且你可以在一定程度上从左到右移动。这样做之后，我想当敌人的生命值大于 70 时，你必须躲避一波子弹。但我发现它有 3 个问题，一是它有残像，不是一颗子弹从它上面下来，就像把它一直画下来一样。两个我显示了文本，如果点击它应该将该文本更改为“你迷失了”，但这不起作用。三，即使我输入代码，它应该在 >+ 70 生命值时触发，在 70 生命值时它会产生子弹，它们停留在顶部，然后当我尝试射击时，它们就会落下。抱歉，如果这个问题很多，但我不知道如何解决。这是我的代码:

import pygame
import time
pygame.font.init()
WIDTH, HEIGHT = 900, 500
WIN = pygame.display.set_mode((WIDTH, HEIGHT))
pygame.display.set_caption("Boss Fight")
FPS = 60
WHITE = (255, 255, 255)
BLACK = (0, 0, 0)
BLUE = (0, 0, 255)
RED = (255,0,0)
FLOOR = pygame.Rect(0, 400, 900, 100)
SPEED = 1
BULLET_SPEED = 1
player = pygame.Rect(50, 350, 50, 50)
numJumps = []
MAXBULLETS = 2
BOSS = pygame.Rect(700, 300, 100, 100)
FONT = pygame.font.SysFont('comicsans', 30)
BOSSHEALTH = 100
winText = ""
RESTART = pygame.USEREVENT + 1
LOST = pygame.USEREVENT + 2


def draw_window(playerBullets, rainBullets):
    WIN.fill(WHITE)
    pygame.draw.rect(WIN, BLACK, FLOOR)
    pygame.draw.rect(WIN, BLUE, player)
    pygame.draw.rect(WIN, RED, BOSS)
    boss_health = FONT.render("BOSS HEALTH: " + str(BOSSHEALTH), 1,BLACK)
    WIN.blit(boss_health, (450, 50))
    won = FONT.render(winText,1,BLACK)
    WIN.blit(won, (100, 50))
    for bullet in playerBullets:
        pygame.draw.rect(WIN, BLACK, bullet)
    for b in rainBullets:
        pygame.draw.rect(WIN, BLACK, b)
    pygame.display.update()




def movement(p):
    keys_helds = pygame.key.get_pressed()
    if keys_helds[pygame.K_a] and p.x + SPEED > 0:
        p.x -= SPEED
    if keys_helds[pygame.K_d] and p.x < 400 + p.width:
        p.x += SPEED

def p_bullet_movement(playerBullets, boss, raining, player, rainBullets):
    for bullet in playerBullets:
        bullet.x += BULLET_SPEED
        if boss.colliderect(bullet):
            global BOSSHEALTH
            BOSSHEALTH-= 10
            playerBullets.remove(bullet)
        if BOSSHEALTH <= 70:
            global winText
            winText = "Bullet Rain!"
            raining = True
            for b in rainBullets:
                b.y += 1
                if player.colliderect(b):
                    pygame.event.post(pygame.event.Event(LOST))
                    rainBullets.remove(b)
                if b.y + BULLET_SPEED > HEIGHT:
                    rainBullets.remove(b)
            bullet1 = pygame.Rect(20, 0, 40, 25)
            bullet2 = pygame.Rect(170, 0, 40, 25)
            bullet3 = pygame.Rect(370, 0, 40, 25)
            bullet4 = pygame.Rect(570, 0, 40, 25)
            rainBullets.append(bullet1)
            rainBullets.append(bullet2)
            rainBullets.append(bullet3)
            rainBullets.append(bullet4)

        if BOSSHEALTH == 0:
            winText = "You Won!"





def main():
    playerBullets = []
    raining = False
    rainBullets = []
    clock = pygame.time.Clock()
    run = True
    while run:
        for event in pygame.event.get():
            if event.type == pygame.QUIT:
                run = False
                pygame.quit()
            if event.type == pygame.KEYDOWN:
                if event.key == pygame.K_SPACE and not(raining):
                    bullet = pygame.Rect(player.x, player.y, 40, 25)
                    playerBullets.append(bullet)
            if event.type == LOST:
                global winText
                wintext = "You Lost!"
                 

        draw_window(playerBullets, rainBullets)
        movement(player)
        p_bullet_movement(playerBullets, BOSS, raining, player, rainBullets)
        clock.tick(FPS)



if __name__ == '__main__':
    main() 

Answer 1

one it has an afterimage, its not a single bullet coming down it like draw it all the way down.

这是因为您每帧为每个玩家子弹创建 4 个新子弹。

Two I have text displayed and if hit it is supposed to change that text to You Lost and that doesn't work.

那是因为你设置了wintext ，不是winText这里:

    if event.type == LOST:
        global winText
        wintext = "You Lost!"

Three even though I put in the code it should trigger at >+ 70 health at 70 health ...

不，您检查 <= 70，而不是 > 70:

...
if BOSSHEALTH <= 70:
   ...

it spawns the bullets and they stay at the top then when I try to shoot is when they come down.

看看您在此处缩进代码的方式:

def p_bullet_movement(playerBullets, boss, raining, player, rainBullets):
    for bullet in playerBullets:
        bullet.x += BULLET_SPEED
        if boss.colliderect(bullet):
            global BOSSHEALTH
            BOSSHEALTH-= 10
            playerBullets.remove(bullet)
        if BOSSHEALTH <= 70:
            global winText
            winText = "Bullet Rain!"
            raining = True
            for b in rainBullets:
                b.y += 1
                ...

您移动 rainBullets 中的每个对象对于每个 bullet在playerBullets如果BOSSHEALTH <= 70 .

所以如果 BOSSHEALTH <= 70不正确或者 playerBullets 中没有对象，for b in rainBullets:永远不会到达线。