【发布时间】：2021-01-31 16:08:36
【问题描述】：
得到了一些代码，但遇到了一个问题： 如何使用 pygame.transform.scale 调整图像大小？ 看了文档，没看懂。 我对 player.py 部分感到困惑。
这是我的代码：
elves.py：
import pygame
import config
from game_state import GameState
from game import Game
pygame.init()
screen = pygame.display.set_mode((config.SCREEN_WIDTH, config.SCREEN_HEIGHT))
pygame.display.set_caption("Elves")
clock = pygame.time.Clock()
game = Game(screen)
game.set_up()
while game.game_state == GameState.RUNNING:
clock.tick(50)
game.update()
pygame.display.flip()
game.py：
import pygame
import config
import math
from player import Player
from game_state import GameState
class Game:
def __init__(self, screen):
self.screen = screen
self.objects = []
self.game_state = GameState.NONE
self.map = []
self.camera = [0, 0]
def set_up(self):
player = Player(1, 1)
self.player = player
self.objects.append(player)
self.game_state = GameState.RUNNING
self.load_map('01')
def update(self):
self.screen.fill(config.BLACK)
self.handle_events()
self.render_map(self.screen)
for object in self.objects:
object.render(self.screen, self.camera)
def handle_events(self):
for event in pygame.event.get():
if event.type == pygame.QUIT:
self.game_state = GameState.ENDED
# handle key events
elif event.type == pygame.KEYDOWN:
if event.key == pygame.K_ESCAPE:
self.game_state = GameState.ENDED
elif event.key == pygame.K_UP: # up
self.move_unit(self.player, [0, -1])
elif event.key == pygame.K_DOWN: # down
self.move_unit(self.player, [0, 1])
elif event.key == pygame.K_LEFT: # left
self.move_unit(self.player, [-1, 0])
elif event.key == pygame.K_RIGHT: # right
self.move_unit(self.player, [1, 0])
def load_map(self, file_name):
with open('maps/' + file_name + '.txt') as map_file:
for line in map_file:
tiles = []
for i in range(0, len(line) - 1, 2):
tiles.append(line[i])
self.map.append(tiles)
print(self.map)
def render_map(self, screen):
self.determine_camera()
y_pos = 0
for line in self.map:
x_pos = 0
for tile in line:
image = map_tile_images[tile]
rect = pygame.Rect(x_pos * config.SCALE, y_pos * config.SCALE - (self.camera[1] * config.SCALE),
config.SCALE, config.SCALE)
screen.blit(image, rect)
x_pos = x_pos + 1
y_pos = y_pos + 1
def move_unit(self, unit, position_change):
new_position = [unit.position[0] + position_change[0], unit.position[1] + position_change[1]]
try:
if self.map[new_position[1]][new_position[0]] == '':
return
except IndexError:
return
if new_position[0] < 0 or new_position[0] > (len(self.map[0]) - 1):
return
if new_position[1] < 0 or new_position[1] > (len(self.map) - 1):
return
if self.map[new_position[1]][new_position[0]] == 'W':
return
if self.map[new_position[1]][new_position[0]] == '0':
return
if self.map[new_position[1]][new_position[0]] == 'T':
return
unit.update_position(new_position)
def determine_camera(self):
max_y_position = len(self.map) - config.SCREEN_HEIGHT / config.SCALE
y_position = self.player.position[1] - math.ceil(round(config.SCREEN_HEIGHT / config.SCALE / 2))
if y_position <= max_y_position and y_position >= 0:
self.camera[1] = y_position
elif y_position < 0:
self.camera[1] = 0
else:
self.camera[1] = max_y_position
map_tile_images = {
"G": pygame.transform.scale(pygame.image.load('imgs/grass.png'), (config.SCALE, config.SCALE)),
"W": pygame.transform.scale(pygame.image.load('imgs/water.png'), (config.SCALE, config.SCALE)),
"0": pygame.transform.scale(pygame.image.load('imgs/none.png'), (config.SCALE, config.SCALE)),
"T": pygame.transform.scale(pygame.image.load('imgs/tree1.png'), (config.SCALE, config.SCALE)),
}
player.py：
import pygame
import config
screen = pygame.display.set_mode((config.SCREEN_WIDTH, config.SCREEN_HEIGHT))
class Player:
def __init__(self, x_postition, y_position):
self.load_image = pygame.image.load('imgs/stepped_on_grass.png')
self.position = [x_postition, y_position]
self.image = pygame.image.load('imgs/goblin.png')
self.image = pygame.transform.scale(self.image, (config.SCALE, config.SCALE))
self.rect = pygame.Rect(self.position[0] * config.SCALE, self.position[1] * config.SCALE, config.SCALE, config.SCALE)
def update(self):
pass
def update_position(self, new_position):
self.position[0] = new_position[0]
self.position[1] = new_position[1]
img = pygame.Surface.blit(screen, self.load_image, (self.position[0], self.position[1]))
pygame.transform.scale(screen, (config.SCALE, config.SCALE))
def render(self, screen, camera):
self.rect = pygame.Rect(self.position[0] * config.SCALE, self.position[1] * config.SCALE - (camera[1] * config.SCALE), config.SCALE, config.SCALE)
screen.blit(self.image, self.rect)
游戏状态.py
from enum import Enum
class GameState(Enum):
NONE = 0,
RUNNING = 1,
ENDED = 2
config.py：
# colours
BLACK = (0, 0, 0)
WHITE = (255, 255, 255)
SCALE = 32
SCREEN_HEIGHT = 480
SCREEN_WIDTH = 640
好的，我知道您不需要所有其他文件，但以防万一，对吧？ 当我上下移动地精时，我没有看到地面发生了变化。
编辑： 问题是：如何使用 pygame.transform.scale 调整图像大小？ 我想要玩家站立的瓷砖来切换图像。 但事实并非如此。 没有错误。只是错误。
【问题讨论】：
-
问题是什么？错误是什么？什么是实际行为，什么是预期行为？
-
@Rabbid76 当我放别的东西时，说参数 1 必须是一个表面。
-
该问题与
pygame.transform.scale无关。问题的标题具有误导性。
标签： python pygame pygame-surface