我正在尝试制作游戏,并且希望使用户能够在按Backspace键时更改其精灵的颜色。截至目前,我没有画任何东西在屏幕上,我也不知道为什么。欢迎提供任何详细的答案,说明如何以及为何更改精灵的颜色: 这是我的代码:
import pygame
pygame.init()
white = (255, 255, 255)
black = (0, 0, 0)
red = (255, 0, 0)
width = 800
height = 600
FPS = 100
font = pygame.font.SysFont(None, 25)
gameDisplay = pygame.display.set_mode((width, height))
pygame.display.set_caption("Second snake game.")
clock = pygame.time.Clock()
def message_to_screen(msg, color):
screen_text = font.render(msg, True, color)
gameDisplay.blit(screen_text, [width/2, height/2])
def gameloop():
exitGame = False
lead_x = width/2
lead_y = height/2
lead_x_change = 0
lead_y_change = 0
block_size = 10
velocity = 0.1
rectangle = pygame.draw.rect(gameDisplay, black, [lead_x, lead_y, block_size, block_size])
while not exitGame:
for event in pygame.event.get():
if event.type == pygame.QUIT:
exitGame = True
pygame.quit()
quit()
if event.type == pygame.KEYDOWN:
if event.key == pygame.K_w:
lead_y_change += -velocity
lead_x_change = 0
if event.key == pygame.K_s:
lead_y_change += velocity
lead_x_change = 0
if event.key == pygame.K_a:
lead_x_change += -velocity
lead_y_change = 0
if event.key == pygame.K_d:
lead_x_change += velocity
lead_y_change = 0
if event.key == pygame.K_BACKSPACE:
rectangle.rect(gameDisplay, black, [lead_x, lead_y, block_size, block_size])
if event.type == pygame.KEYUP:
if event.key == pygame.K_a or event.key == pygame.K_d:
lead_x_change = 0
if event.key == pygame.K_w or event.key == pygame.K_s:
lead_y_change = 0
lead_x += lead_x_change
lead_y += lead_y_change
gameDisplay.fill(white)
pygame.display.update()
clock.tick(FPS)
gameloop()
答案 0 :(得分:3)
首先,以适当的顺序放置渲染功能,并将其放入while循环中:
gameDisplay.fill(white) # Display fill comes first
pygame.draw.rect(gameDisplay, black, rectangle) # Then draw your objects
pygame.display.flip() # Update the screen
然后,正确定义pygame.Rect对象
rectangle = pygame.Rect(lead_x, lead_y, block_size, block_size)
这可能是您试图找到的内容(有一些修复):
import pygame
pygame.init()
# Constants
WHITE = (255, 255, 255)
BLACK = (0, 0, 0)
RED = (255, 0, 0)
WIDTH = 800
HEIGHT = 600
FPS = 100
FONT = pygame.font.SysFont(None, 25)
BLOCK_SIZE = 10
VELOCITY = 10
gameDisplay = pygame.display.set_mode((WIDTH, HEIGHT))
pygame.display.set_caption("Second snake game.")
clock = pygame.time.Clock()
def message_to_screen(msg, color):
screen_text = font.render(msg, True, color)
gameDisplay.blit(screen_text, [width/2, height/2])
def gameloop():
exitGame = False
x = WIDTH / 2
y = HEIGHT / 2
rectangle = pygame.Rect(x, y, BLOCK_SIZE, BLOCK_SIZE)
rectangle_color = BLACK
while not exitGame:
clock.tick(FPS)
# Pygame events
for event in pygame.event.get():
if event.type == pygame.QUIT:
exitGame = True
pygame.quit()
quit()
if event.type == pygame.KEYUP:
if event.key == pygame.K_w:
y -= VELOCITY
if event.key == pygame.K_s:
y += VELOCITY
if event.key == pygame.K_a:
x -= VELOCITY
if event.key == pygame.K_d:
x += VELOCITY
if event.key == pygame.K_BACKSPACE:
rectangle_color = RED if rectangle_color == BLACK else BLACK
# Update rect coords
rectangle = pygame.Rect(x, y, BLOCK_SIZE, BLOCK_SIZE)
# Render everything
gameDisplay.fill(WHITE)
pygame.draw.rect(gameDisplay, rectangle_color, rectangle)
pygame.display.flip()
gameloop()