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dinosaur.py

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+'''
+定义一个：小恐龙类
+'''
+import pygame
+
+
+'''小恐龙'''
+class Dinosaur(pygame.sprite.Sprite):
+	def __init__(self, imagepaths, position=(40, 147), size=[(44, 47), (59, 47)], **kwargs):
+		pygame.sprite.Sprite.__init__(self)
+		# 导入所有图片
+		self.images = []
+		image = pygame.image.load(imagepaths[0])
+		for i in range(5):
+			self.images.append(pygame.transform.scale(image.subsurface((i*88, 0), (88, 95)), size[0]))
+		image = pygame.image.load(imagepaths[1])
+		for i in range(2):
+			self.images.append(pygame.transform.scale(image.subsurface((i*118, 0), (118, 95)), size[1]))
+		self.image_idx = 0
+		self.image = self.images[self.image_idx]
+		self.rect = self.image.get_rect()
+		self.rect.left, self.rect.bottom = position
+		self.mask = pygame.mask.from_surface(self.image)
+		# 定义一些必要的变量
+		self.init_position = position
+		self.refresh_rate = 5
+		self.refresh_counter = 0
+		self.speed = 11.5
+		self.gravity = 0.6
+		self.is_jumping = False
+		self.is_ducking = False
+		self.is_dead = False
+		self.movement = [0, 0]
+	'''跳跃'''
+	def jump(self, sounds):
+		if self.is_dead or self.is_jumping:
+			return
+		sounds['jump'].play()
+		self.is_jumping = True
+		self.movement[1] = -1*self.speed
+	'''低头'''
+	def duck(self):
+		if self.is_jumping or self.is_dead:
+			return
+		self.is_ducking = True
+	'''不低头'''
+	def unduck(self):
+		self.is_ducking = False
+	'''死掉了'''
+	def die(self, sounds):
+		if self.is_dead:
+			return
+		sounds['die'].play()
+		self.is_dead = True
+	'''将恐龙画到屏幕'''
+	def draw(self, screen):
+		screen.blit(self.image, self.rect)
+	'''载入当前状态的图片'''
+	def loadImage(self):
+		self.image = self.images[self.image_idx]
+		rect = self.image.get_rect()
+		rect.left, rect.top = self.rect.left, self.rect.top
+		self.rect = rect
+		self.mask = pygame.mask.from_surface(self.image)
+	'''更新小恐龙'''
+	def update(self):
+		if self.is_dead:
+			self.image_idx = 4
+			self.loadImage()
+			return
+		if self.is_jumping:
+			self.movement[1] += self.gravity
+			self.image_idx = 0
+			self.loadImage()
+			self.rect = self.rect.move(self.movement)
+			if self.rect.bottom >= self.init_position[1]:
+				self.rect.bottom = self.init_position[1]
+				self.is_jumping = False
+		elif self.is_ducking:
+			if self.refresh_counter % self.refresh_rate == 0:
+				self.refresh_counter = 0
+				self.image_idx = 5 if self.image_idx == 6 else 6
+				self.loadImage()
+		else:
+			if self.refresh_counter % self.refresh_rate == 0:
+				self.refresh_counter = 0
+				if self.image_idx == 1:
+					self.image_idx = 2
+				elif self.image_idx == 2:
+					self.image_idx = 3
+				else:
+					self.image_idx = 1
+				self.loadImage()
+		self.refresh_counter += 1