pygame精灵加载动画

import pygame
from pygame.locals import *
class MySprite(pygame.sprite.Sprite):
    def __init__(self, target):
        pygame.sprite.Sprite.__init__(self)
        self.target_surface = target
        self.image = None
        self.master_image = None
        self.rect = None
        self.topleft = 0,0
        self.frame = 0
        self.old_frame = -1
        self.frame_width = 1
        self.frame_height = 1
        self.first_frame = 0
        self.last_frame = 0
        self.columns = 1
        self.last_time = 0
    def load(self, filename, width, height, columns):
        self.master_image = pygame.image.load(filename).convert_alpha()
        self.frame_width = width
        self.frame_height = height
        self.rect = 0,0,width,height
        self.columns = columns
        self.rect = self.master_image.get_rect()
        self.last_frame = (self.rect.width // width) * (self.rect.height // height) - 1
    def update(self, current_time, rate=60):
        if current_time > self.last_time + rate:
            self.frame += 1
        if self.frame > self.last_frame:
            self.frame = self.first_frame
            self.last_time = current_time
        if self.frame != self.old_frame:
            frame_x = (self.frame % self.columns) * self.frame_width
            frame_y = (self.frame // self.columns) * self.frame_height
            rect = ( frame_x, frame_y, self.frame_width, self.frame_height )
            self.image = self.master_image.subsurface(rect)
            self.old_frame = self.frame
            #画面移动
            self.rect.top=self.rect.top+1
            self.rect.left=self.rect.left+1


pygame.init()
screen = pygame.display.set_mode((800,600),0,32)
pygame.display.set_caption("精灵类动画测试")
font = pygame.font.Font(None, 18)
framerate = pygame.time.Clock()

cat = MySprite(screen)
cat.load("sprite2.png", 92, 95, 4)           #精灵图片
#cat.load("sprite3.png", 85, 132, 4) #精灵图片,宽度,高度,列数
group = pygame.sprite.Group()
group.add(cat)
while True:
    framerate.tick(10)
    ticks = pygame.time.get_ticks()
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()
            exit()
        key = pygame.key.get_pressed()
        if key[pygame.K_ESCAPE]:
            exit()

    screen.fill((255,255,255))
    group.update(ticks)
    group.draw(screen)
    pygame.display.update()
 

 

Pygame中创建精灵动画通常涉及以下几个步骤: 1. **导入模块**:首先需要导入pygame模块以及精灵图像相关的`Surface`和`Rect`类。 ```python import pygame from pygame.sprite import Sprite ``` 2. **加载图像**:将动画序列的每一帧图片作为单独的Surface对象加载进来,并存储在一个列表里。 ```python frames = [pygame.image.load('frame_0.png'), pygame.image.load('frame_1.png'), ...] ``` 3. **创建精灵类**:继承自`Sprite`类,定义一个包含当前帧、帧数、速度等属性的类。例如: ```python class AnimatedSprite(Sprite): def __init__(self, frame_list, frame_index=0, fps=10): super().__init__() self.frame_list = frame_list self.current_frame = frame_index self.frame_speed = 1 / fps self.image = frame_list[self.current_frame] self.rect = self.image.get_rect() # 动画更新方法 def update(self, time_passed): if time_passed > self.frame_speed: self.current_frame = (self.current_frame + 1) % len(self.frame_list) self.image = self.frame_list[self.current_frame] self.rect = self.image.get_rect() ``` 4. **播放动画**:在游戏循环中,对精灵的`update()`方法进行调用,传入时间间隔,使其按照预定的速度切换帧。 ```python def game_loop(): while True: for event in pygame.event.get(): # ... time_passed = pygame.time.get_ticks() - last_time all_sprites.update(time_passed) # 渲染屏幕并更新 screen.fill((0, 0, 0)) all_sprites.draw(screen) pygame.display.flip() last_time = pygame.time.get_ticks() ```
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