Почему змейка на pygame ездит по диагонали?

Question

[Vadimganin]

Почему змейка ездит по диагонали, а не по горизонтали?

Код

import pygame

pygame.init()

# display settings
width = 650
height = 480
display = pygame.display.set_mode((width, height))
pygame.display.update()
pygame.display.set_caption("Snake Game")

# run loop
run = True

# snake settings
snake_pos = {
	"x": width/2-5,
	"y": height/2-5,
	"x_change": 0,
	"y_change": 0
}

while run:
	for event in pygame.event.get():
		if event.type == pygame.QUIT:
			run = False

		elif event.type == pygame.KEYDOWN:
			if event.key == pygame.K_d:
				snake_pos["x_change"] = 10
				snake_pos["y_change"] = 0
			elif event.key == pygame.K_w:
				snake_pos["x_change"] = -10
				snake_pos["y_change"] = 0
			elif event.key == pygame.K_s:
				snake_pos["x_change"] = 0
				snake_pos["y_change"] = 10
			elif event.key == pygame.K_w:
				snake_pos["x_change"] = 0
				snake_pos["y_change"] = -10

	# snake location
	snake_pos["x"] += snake_pos["x_change"]
	snake_pos["y"] += snake_pos["x_change"]

	# draw snake
	pygame.draw.rect(display, (0, 255, 0), [snake_pos["x"], snake_pos["y"], 10, 10])
	pygame.display.update()

# exit in every occasion
pygame.quit()

Answer 1

[Timur25]

Почему бы не сделать так?

spoiler

import pygame

pygame.init()

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


# display settings
width = 650
height = 480
display = pygame.display.set_mode((width, height))
pygame.display.update()
pygame.display.set_caption("Snake Game")

FPS = 60
clock = pygame.time.Clock()

# run loop
run = True

# snake settings
x = 240
y = 325
speed = 5

flR = flL = flUp = fldown = False

while run:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            run = False

        elif event.type == pygame.KEYDOWN:
            if event.key == pygame.K_d:
                flR = True
                flL = flUp = fldown = False
            elif event.key == pygame.K_w:
                flUp = True
                flR = flL = fldown = False
            elif event.key == pygame.K_s:
                fldown = True
                flR = flUp = flL = False
            elif event.key == pygame.K_a:
                flL = True
                flR  = flUp = fldown = False

  # snake location
    if (flL) and (x > 0):
        x -= speed
    elif (flR) and (x < width):
        x += speed
    elif (flUp) and (y > 0):
        y -= speed
    elif (fldown) and (y < height):
        y += speed

    display.fill(WHITE)
  # draw snake
    pygame.draw.rect(display, (0, 255, 0),
                     (x, y, 10, 10))
    pygame.display.update()
    clock.tick(FPS)

# exit in every occasion
pygame.quit()

Answer 2

[YariKartoshe4ka]

snake_pos["x"] += snake_pos["x_change"]
snake_pos["y"] += snake_pos["x_change"]

Ты прибавляешь snake_pos["x_change"] и к X и к Y