如何修复对角线移动？

Question

我一直在向一个名叫 dafluffypotatoe 的 youtuber 学习 pygame，并且我已经编写了自己的玩家移动代码我想知道是否可以修复对角线移动？因为当我走对角线时它的速度是原来的两倍。

我也是stack over flow的新手。

这是我使用的代码的粘贴箱

import pygame, sys
from pygame.locals import *

# init pygame
pygame.init()

# clock
clock = pygame.time.Clock()

WINDOW_SIZE = 1024, 512

# screen and display
screen = pygame.display.set_mode(WINDOW_SIZE)
display = pygame.Surface((512, 256))

FPS = 60

moving_left = False
moving_right = False
moving_up = False
moving_down = False
player_x_loc = 50
player_y_loc = 50

def load_map(path):
    f = open(path + '.txt', 'r')
    data = f.read()
    f.close()
    data = data.split('\n')
    game_map = []
    for row in data:
        game_map.append(list(row))
    return game_map

game_map = load_map('map')

# player
player_img = pygame.image.load('player.png')

# blocks
block_basic = pygame.image.load('blocck.png')

# game loop
while True:

    # colour screen
    display.fill((33, 15, 15))

    # load tiles
    tile_rects = []
    y = 0
    for row in game_map:
        x = 0
        for tile in row:
            if tile == '1':
                display.blit(block_basic, (x * 32, y * 32))
            if tile == '0':
                tile_rects.append(pygame.Rect(x * 32, y * 32, 32, 32))
            x += 1
        y += 1

    # basic speed x
    if moving_left == True:
        player_x_loc -= 4
    if moving_right == True:
        player_x_loc += 4
    else:
        player_x_loc == 0

    # basic speed y
    if moving_up == True:
        player_y_loc -= 4
    if moving_down == True:
        player_y_loc += 4
    else:
        player_y_loc ==  0



display.blit(player_img, (player_x_loc, player_y_loc))

for event in pygame.event.get():
    if event.type == QUIT:
        pygame.quit()
        sys.exit()
    # keydown
    if event.type == KEYDOWN:
        if event.key == K_a:
            moving_left = True
        if event.key == K_d:
            moving_right = True
        if event.key == K_w:
            moving_up = True
        if event.key == K_s:
            moving_down = True
    # keyup
    if event.type == KEYUP:
        if event.key == K_a:
            moving_left = False
        if event.key == K_d:
            moving_right = False
        if event.key == K_w:
            moving_up = False
        if event.key == K_s:
            moving_down = False

screen.blit(pygame.transform.scale(display, WINDOW_SIZE), (0, 0))
pygame.display.update()
clock.tick(FPS)

Answer 1

您必须使用归一化方向矢量和恒定速度移动玩家。最简单的方法是使用 pygame.math.Vector2.scale_to_length:

while True:
    # [...]

    move_vec = pygame.math.Vector2(
        moving_right - moving_left,
        moving_down - moving_up)
    if move_vec.x != 0 or move_vec.y != 0:
        move_vec.scale_to_length(4)
        player_x_loc += move_vec.x
        player_y_loc += move_vec.y

    # [...]

如何修复对角线移动？

How do I fix diagonal movement?

python

pygame