python - 从 Pygame 中的同一个 Sprite 类中拖动具有不同“update()”方法的多个精灵
问题描述
我正在尝试制作全部来自同一个 pygame 精灵类的多个精灵。
class animatedSprites(pygame.sprite.Sprite):
def __init__(self, spriteName):
pygame.sprite.Sprite.__init__(self)
self.image = pygame.Surface((width,height))
self.images = []
self.images.append(spriteName[0])
self.rect = self.image.get_rect() #sets sprites size and pos
self.rect.center = (POSITIONx1[4], POSITIONy1[4])
self.animation_frames = 12
self.current_frame = 0
self.previous_positiony = self.rect.y
self.previous_positionx = self.rect.x
def update(self):
global MOUSEPRESSED
if (MOUSEPRESSED == 1):
self.rect = self.image.get_rect()
self.rect.y = POSITIONy1[get_square_under_mousey()] - 25
self.rect.x = POSITIONx1[get_square_under_mousex()] - 25
if (MOUSEPRESSED == 2):
if collide(plant, bought2):
self.rect.y = self.previous_positiony
self.rect.x = self.previous_positionx
else:
self.rect = self.image.get_rect()
self.rect.y = POSITIONy1[get_square_under_mousey()] + 35#pulled x and y pos from func
self.rect.x = POSITIONx1[get_square_under_mousex()] - 25
self.previous_positiony = self.rect.y
self.previous_positionx = self.rect.x
MOUSEPRESSED = 0
我使用这个类在屏幕上创建一个精灵,然后使用 def update() 来控制精灵。sprite 的控制方式是当用户点击 sprite 时,他们可以用鼠标拖动它并将其移动到屏幕上任何他们想要的位置。问题是,如果我使用这个类来创建第二个精灵并在屏幕上同时拥有两个精灵,当用户“拿起”一个精灵时,它们都会移动到鼠标位置。我只想根据被点击的动作做出一个动作。
我假设他们都移动到同一个位置,因为他们都使用相同的 def update() 来决定他们的移动,所以我的问题是,在 pygame 或 python 中是否存在让被点击的移动和不是两者都有,没有创造第二个
class animatedSprites(pygame.sprite.Sprite):
来实现它。我想一次在屏幕上显示多个精灵,但不想制作几十个单独的类和 update() defs 来分别控制每一个。
抱歉,如果这没有意义,我是 python 和 pygame 的初学者。
解决方案
我建议创建一个DragOperator
可以拖动pygame.Rect
对象的类:
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]
矩形的拖动是在update方法中实现的。 pygame.sprite.Sprite
在对象中使用此类。将事件列表传递给Spriteupdate
的方法并将其委托给拖动操作符:
class animatedSprites(pygame.sprite.Sprite):
def __init__(self, spriteName):
# [...]
self.drag = DragOperator(self)
def update(self, event_list):
self.drag.update(event_list)
将主应用程序循环中的事件列表传递给pygame.sprite.Group
:
all_sprites = pygame.sprite.Group()
all_sprites.add(animatedSprites("my_sprite"))
run = True
while run:
event_list = pygame.event.get()
for event in event_list:
if event.type == pygame.QUIT:
run = False
all_sprites.update(event_list)
# [...]
最小的例子: repl.it/@Rabbid76/PyGame-MouseDrag
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 SpriteObject(pygame.sprite.Sprite):
def __init__(self, x, y, color):
super().__init__()
self.original_image = pygame.Surface((50, 50), pygame.SRCALPHA)
pygame.draw.circle(self.original_image, color, (25, 25), 25)
self.drag_image = pygame.Surface((50, 50), pygame.SRCALPHA)
pygame.draw.circle(self.drag_image, color, (25, 25), 25)
pygame.draw.circle(self.drag_image, (255, 255, 255), (25, 25), 25, 4)
self.image = self.original_image
self.rect = self.image.get_rect(center = (x, y))
self.drag = DragOperator(self)
def update(self, event_list):
self.drag.update(event_list)
self.image = self.drag_image if self.drag.dragging else self.original_image
pygame.init()
window = pygame.display.set_mode((300, 300))
clock = pygame.time.Clock()
sprite_object = SpriteObject(*window.get_rect().center, (255, 255, 0))
group = pygame.sprite.Group([
SpriteObject(window.get_width() // 3, window.get_height() // 3, (255, 0, 0)),
SpriteObject(window.get_width() * 2 // 3, window.get_height() // 3, (0, 255, 0)),
SpriteObject(window.get_width() // 3, window.get_height() * 2 // 3, (0, 0, 255)),
SpriteObject(window.get_width() * 2// 3, window.get_height() * 2 // 3, (255, 255, 0)),
])
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.fill(0)
group.draw(window)
pygame.display.flip()
pygame.quit()
exit()