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73 lines
2.0 KiB
73 lines
2.0 KiB
6 months ago
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'''
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Function:
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定义bird类
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Author:
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Charles
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微信公众号:
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Charles的皮卡丘
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'''
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import pygame
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import itertools
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'''bird类'''
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class Bird(pygame.sprite.Sprite):
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def __init__(self, images, idx, position, **kwargs):
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pygame.sprite.Sprite.__init__(self)
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self.images = images
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self.image = list(images.values())[idx]
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self.rect = self.image.get_rect()
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self.mask = pygame.mask.from_surface(self.image)
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self.rect.left, self.rect.top = position
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# 竖直方向运动所需变量
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self.is_flapped = False
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self.down_speed = 0
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self.up_speed = 9
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# 切换bird形态
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self.bird_idx = idx
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self.bird_idx_cycle = itertools.cycle([0, 1, 2, 1])
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self.bird_idx_change_count = 0
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'''更新'''
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def update(self, boundary_values, time_passed):
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# 竖直方向的位置更新
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if self.is_flapped:
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self.up_speed -= 60 * time_passed
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self.rect.top -= self.up_speed
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if self.up_speed <= 0:
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self.unsetFlapped()
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self.up_speed = 9
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self.down_speed = 0
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else:
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self.down_speed += 40 * time_passed
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self.rect.bottom += self.down_speed
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# 判断bird是否因为撞到上下边界而挂掉了
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is_dead = False
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if self.rect.bottom > boundary_values[1]:
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is_dead = True
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self.up_speed = 0
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self.down_speed = 0
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self.rect.bottom = boundary_values[1]
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if self.rect.top < boundary_values[0]:
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is_dead = True
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self.up_speed = 0
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self.down_speed = 0
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self.rect.top = boundary_values[0]
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# 切换bird形态模拟以模拟扇翅膀效果
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self.bird_idx_change_count += 1
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if self.bird_idx_change_count % 5 == 0:
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self.bird_idx = next(self.bird_idx_cycle)
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self.image = list(self.images.values())[self.bird_idx]
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self.bird_idx_change_count = 0
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return is_dead
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'''设置为飞行模式'''
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def setFlapped(self):
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if self.is_flapped:
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self.up_speed = max(12, self.up_speed+1)
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else:
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self.is_flapped = True
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'''设置为下落模式'''
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def unsetFlapped(self):
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self.is_flapped = False
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'''绑定到屏幕'''
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def draw(self, screen):
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screen.blit(self.image, self.rect)
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