"""角色向左向右造型示例程序,根据水平方向来决定使用向左还是向右的造型。本程序使用arcade制作,如果没有安装,请先在cmd下输入pip install arcade """ import arcade import os SPRITE_SCALING = 0.5 SCREEN_WIDTH = 800 SCREEN_HEIGHT = 600 SCREEN_TITLE = "角色向左向右造型示例程序" MOVEMENT_SPEED = 5 TEXTURE_LEFT = 0 TEXTURE_RIGHT = 1 class Player(arcade.Sprite): def __init__(self): super().__init__() # 加载一个向左和向右的造型. # mirrored=True 会对图像进行镜像转换 texture = arcade.load_texture("images/princess.png", mirrored=True, scale=SPRITE_SCALING) self.textures.append(texture) texture = arcade.load_texture("images/princess.png", scale=SPRITE_SCALING) self.textures.append(texture) print(self.textures) # 缺省为向右造型 self.set_texture(TEXTURE_RIGHT) print(TEXTURE_LEFT) print(TEXTURE_RIGHT) def update(self): self.center_x += self.change_x self.center_y += self.change_y # 根据水平速度的正负决定造型 if self.change_x < 0: self.set_texture(TEXTURE_LEFT) if self.change_x > 0: self.set_texture(TEXTURE_RIGHT) if self.left < 0: self.left = 0 elif self.right > SCREEN_WIDTH - 1: self.right = SCREEN_WIDTH - 1 if self.bottom < 0: self.bottom = 0 elif self.top > SCREEN_HEIGHT - 1: self.top = SCREEN_HEIGHT - 1 class MyGame(arcade.Window): """ 程序的游戏类,它继承自arcade.Window """ def __init__(self, width, height, title): """ 初始化方法 """ # Call the parent class initializer super().__init__(width, height, title) # 所有角色列表 self.all_sprites_list = None # 定义玩家 self.player_sprite = None self.score = 0 # 设置背景颜色 arcade.set_background_color(arcade.color.AMAZON) def setup(self): """ 设置变量的初始值. """ # Sprite lists self.all_sprites_list = arcade.SpriteList() # Set up the player self.score = 0 self.player_sprite = Player() self.player_sprite.center_x = SCREEN_WIDTH / 2 self.player_sprite.center_y = SCREEN_HEIGHT / 2 self.all_sprites_list.append(self.player_sprite) def on_draw(self): """ 渲染屏幕上的所有对象 """ # This command has to happen before we start drawing arcade.start_render() # Draw all the sprites. self.all_sprites_list.draw() def update(self, delta_time): """ 移动与游戏逻辑在这里编写 """ # 所有角色更新坐标 self.all_sprites_list.update() def on_key_press(self, key, modifiers): """当按下键时调用此方法. """ if key == arcade.key.UP: self.player_sprite.change_y = MOVEMENT_SPEED elif key == arcade.key.DOWN: self.player_sprite.change_y = -MOVEMENT_SPEED elif key == arcade.key.LEFT: self.player_sprite.change_x = -MOVEMENT_SPEED elif key == arcade.key.RIGHT: self.player_sprite.change_x = MOVEMENT_SPEED def on_key_release(self, key, modifiers): """当松开键时调用此方法. """ if key == arcade.key.UP or key == arcade.key.DOWN: self.player_sprite.change_y = 0 elif key == arcade.key.LEFT or key == arcade.key.RIGHT: self.player_sprite.change_x = 0 def main(): """ Main method """ window = MyGame(SCREEN_WIDTH, SCREEN_HEIGHT, SCREEN_TITLE) window.setup() arcade.run() if __name__ == "__main__": main()
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