python - 缺乏 Pygame 经验

Question

我正在 Pygame 中开发一款射击类游戏供我自己娱乐，在创建玩家的基本 Action 的过程中我遇到了一些疑问，“Dash”和“Switch”均未按预期工作。

...

def switch(self):
    if self.offensive_stance() == True:
        self.defensive_stance() == False
    if self.defensive_stance() == True:
        self.offensive_stance() == False
    switch_stance = cycle([self.offensive_stance(), 
    self.defensive_stance()])
    next(switch_stance)

按下 LSHIFT 时#switch() 在 Player 类下正常工作

def dash(self, cooldown=200):
    self.last_dash = pygame.time.get_ticks()
    self.cooldown = cooldown

def dash_properties(self):
    now = pygame.ticks.get_ticks()
    if self.last_dash - now >= cooldown:
        self.last_dash= now
        self.rect.x -= self.speedx * 2
        self.rect.y -= self.speedy * 2
...

我预计这两个对象都会有这两个结果。

冲刺(x 轴和 y 轴速度增加 1 秒，然后冷却)- 由于缺乏经验，无法创建它。

切换(在 2 个功能之间循环，进攻和防守)- 无法使用 LSHIFT 正确创建切换，防守姿态仅在按下 LSHIFT 时激活

Answer 1

使用LSHIFT切换变量active中的值的最小示例，并用于切换矩形中的颜色(红色/绿色)。

import pygame

# --- constants --- (UPPER CASE NAMES)

BLACK = (  0,   0,   0)
RED   = (255,   0,   0)
GREEN = (  0, 255,   0)

# --- main ---

pygame.init()

screen = pygame.display.set_mode((800, 600))
screen_rect = screen.get_rect()

rect = pygame.Rect(0, 0, 200, 200)
rect.center = screen_rect.center

active = False

# --- mainloop ---

clock = pygame.time.Clock()

running = True

while running:

    # --- events ---

    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False
        elif event.type == pygame.KEYDOWN:
            if event.key == pygame.K_ESCAPE:
                running = False

            elif event.key == pygame.K_LSHIFT:
                # toggle
                active = not active

    # --- updates ---

    if active:
        color = GREEN
    else:
        color = RED

    # --- draws ---

    screen.fill(BLACK)

    pygame.draw.rect(screen, color, rect)        
    pygame.display.flip()

    clock.tick(5)

# --- end ---

pygame.quit()