如何使用带精灵的图像字典？

Question

我一直在尝试不同的方法来拖放我的棋子我找到了方法，但问题是我正在使用字典通过 pygame.image.load 加载我的图像。我为我的图像创建了一个字典，如下所示：

IMAGES = {}

def loadImages():
    pieces = ['wp', 'wR', 'wN', 'wB', 'wK', 'wQ', 'bp', 'bR', 'bN', 'bB', 'bK', 'bQ']
    for piece in pieces:
        IMAGES[piece] = pygame.transform.scale(
                            pygame.image.load("images/" + piece + ".png"), 
                                              (SQ_SIZE, SQ_SIZE))
    # Note we can access an image by saying "IMAGES['wp']'

我已经解决了精灵拖放的这些问题：
How to move Sprite in Pygame

我已经尝试了其中的许多方法，但我似乎无法弄清楚如何在我的图像词典代码中实现它们中的任何一个。我只是迷路了。我需要帮助。如果您需要更多信息或代码，请告诉我。

Answer 1

您需要使用图像创建pygame.sprite.Sprite 对象。用带有图像的字典中的精灵创建一个字典。您必须为每个片段创建一个 pygame.sprite.Sprite 对象。因此，您必须使用白色棋子的图像创建 8 Sprites。为白色棋子创建 1 个字典，为黑色棋子创建一个字典。将所有图片加到一张 pygame.sprite.Group:

class ChessSprite(pygame.sprite.Sprite):
    def __init__(self, i, j, image):
        super().__init__() 
        # [...]

white = {}
for i, f in enumerate(['wR', 'wN', 'wB', 'wQ', 'wK', 'wB', 'wN', 'wR']):
    white[f] = ChessSprite(i, 0, IMAGES[f])
for i in range(8):
    pawn_name = 'wp' + str(i+1)
    white[pawn_name] = ChessSprite(i, 1, IMAGES['wp'])

black = {}
for i, f in enumerate(['bR', 'bN', 'bB', 'bQ', 'bK', 'bB', 'bN', 'bR']):
    black[f] = ChessSprite(i, 7, IMAGES[f])
for i in range(8):
    pawn_name = 'bp' + str(i+1)
    black[pawn_name] = ChessSprite(i, 6, IMAGES['bp'])

group = pygame.sprite.Group()
group.add(white.values())
group.add(black.values())

使用此设置，您可以单独拖动每一块。参见 Draw Sprite and 。

最小示例：

import pygame

class DragOperator:
    def __init__(self, sprite):
        self.sprite = sprite
        self.dragging = False
        self.rel_pos = (0, 0)
    def update(self, event_list):
        for event in event_list:
            if event.type == pygame.MOUSEBUTTONDOWN:
                self.dragging = self.sprite.rect.collidepoint(event.pos)
                self.rel_pos = event.pos[0] - self.sprite.rect.x, event.pos[1] - self.sprite.rect.y
            if event.type == pygame.MOUSEBUTTONUP:
                self.dragging = False
            if event.type == pygame.MOUSEMOTION and self.dragging:
                self.sprite.rect.topleft = event.pos[0] - self.rel_pos[0], event.pos[1] - self.rel_pos[1]

class ChessSprite(pygame.sprite.Sprite):
    def __init__(self, board_rect, i, j, image):
        super().__init__() 
        self.board = board_rect
        self.image = image 
        self.set_pos(i, j)
        self.drag = DragOperator(self)
    def set_pos(self, i, j):
        x = self.board.left + self.board.width // 8 * i + self.board.width // 16
        y = self.board.left + self.board.height // 8 * (7 - j) + self.board.height // 16
        self.rect = self.image.get_rect(center = (x, y))
    def update(self, event_list):
        self.drag.update(event_list)
        if not self.drag.dragging:
            i = max(0, min(7, (self.rect.centerx - self.board.left) // (self.board.width // 8)))
            j = 7 - max(0, min(7, (self.rect.centery - self.board.top) // (self.board.height // 8)))
            self.set_pos(i, j)
        
pygame.init()
window = pygame.display.set_mode((500, 500))
clock = pygame.time.Clock()

board = pygame.Surface(window.get_size())
board.fill((255, 255, 255))
size = (min(window.get_size()) - 20) // 8
start = (window.get_width() - size * 8) // 2, (window.get_height() - size * 8) // 2
board_rect = pygame.Rect(*start, size*8, size*8)
ts, w, h, c1, c2 = 50, *window.get_size(), (128, 128, 128), (64, 64, 64)
for y in range(8):
    for x in range(8):
        color = (192, 192, 164) if (x+y) % 2 == 0 else (96, 64, 32)
        pygame.draw.rect(board, color, (start[0]+ x*size, start[1] + y*size, size, size))

# https://en.wikipedia.org/wiki/Chess_symbols_in_Unicode
white_figures = { 'king': '♔', 'queen': '♕', 'rook': '♖', 'bishop': '♗', 'knight': '♘', 'pawn': '♙'}
black_figures = { 'king': '♚', 'queen': '♛', 'rook': '♜', 'bishop': '♝', 'knight': '♞', 'pawn': '♟'}

seguisy = pygame.font.SysFont("segoeuisymbol", size-4)
white_images = { k : seguisy.render(c, True, (255, 255, 255)) for k, c in white_figures.items() }
black_images = { k : seguisy.render(c, True, (0, 0, 0)) for k, c in black_figures.items() } 

group = pygame.sprite.Group()
figures = ['rook', 'knight', 'bishop', 'queen', 'king', 'bishop', 'knight', 'rook']
for i, figure in enumerate(figures):
    group.add(ChessSprite(board_rect, i, 0, white_images[figure]))
    group.add(ChessSprite(board_rect, i, 1, white_images['pawn']))
    group.add(ChessSprite(board_rect, i, 7, black_images[figure]))
    group.add(ChessSprite(board_rect, i, 6, black_images['pawn']))
   
run = True
while run:
    clock.tick(60)
    event_list = pygame.event.get()
    for event in event_list:
        if event.type == pygame.QUIT:
            run = False

    group.update(event_list)

    window.blit(board, (0, 0))
    group.draw(window)
    pygame.display.flip()

pygame.quit()
exit()

如何使用带精灵的图像字典？

How to use a dictionary of images with sprite?

python

pygame

pygame-surface