python街机游戏模块arcade带动画人物行走角色示例

"""
带动画人物行走角色示例。本程序通过操作一个小人的上下左右移动去收集金币。
"""
import arcade
import random
import os

SCREEN_WIDTH = 800
SCREEN_HEIGHT = 600
SCREEN_TITLE = "带动画人物行走角色示例： 改编及注释：李兴球"

COIN_SCALE = 1.0
COIN_COUNT = 50

MOVEMENT_SPEED = 5


class MyGame(arcade.Window):
    """ 定义游戏类. """

    def __init__(self, width, height, title):
        """
        初始化方法
        """
        super().__init__(width, height, title)

    
        # 设置工作目录，通过python -m命令运行程序时需要设置，否则不要管它。
        file_path = os.path.dirname(os.path.abspath(__file__))
        os.chdir(file_path)

        """ 定义游戏中需要用到的变量. """

        # 角色列表
        self.all_sprites_list = None  # 所有角色列表，以便统一更新与重画
        self.coin_list = None         # 所有金币组成的列表

        # 设置玩家变量
        self.score = 0
        self.player = None

    def setup(self):
        self.all_sprites_list = arcade.SpriteList()
        self.coin_list = arcade.SpriteList()

        # 实例化动画步行角色对象
        self.score = 0
        self.player = arcade.AnimatedWalkingSprite()  # 动画走动角色类

        character_scale = 0.45                        # 角色缩放比例
        self.player.stand_right_textures = []
        self.player.stand_right_textures.append(arcade.load_texture("images/Pico walk1.png",
                                                                    scale=character_scale))
        self.player.stand_left_textures = []
        self.player.stand_left_textures.append(arcade.load_texture("images/Pico walk1.png",
                                                                   scale=character_scale, mirrored=True))

        self.player.walk_right_textures = []

        self.player.walk_right_textures.append(arcade.load_texture("images/Pico walk1.png",
                                                                   scale=character_scale))
        self.player.walk_right_textures.append(arcade.load_texture("images/Pico walk2.png",
                                                                   scale=character_scale))
        self.player.walk_right_textures.append(arcade.load_texture("images/Pico walk3.png",
                                                                   scale=character_scale))
        self.player.walk_right_textures.append(arcade.load_texture("images/Pico walk4.png",
                                                                   scale=character_scale))

        self.player.walk_left_textures = []

        self.player.walk_left_textures.append(arcade.load_texture("images/Pico walk1.png",
                                                                  scale=character_scale, mirrored=True))
        self.player.walk_left_textures.append(arcade.load_texture("images/Pico walk2.png",
                                                                  scale=character_scale, mirrored=True))
        self.player.walk_left_textures.append(arcade.load_texture("images/Pico walk3.png",
                                                                  scale=character_scale, mirrored=True))
        self.player.walk_left_textures.append(arcade.load_texture("images/Pico walk4.png",
                                                                  scale=character_scale, mirrored=True))

        self.player.texture_change_distance = 20

        self.player.center_x = SCREEN_WIDTH // 2
        self.player.center_y = SCREEN_HEIGHT // 2
        self.player.scale = 0.8

        self.all_sprites_list.append(self.player)                # 增加到所有角色列表

        for i in range(COIN_COUNT):
            coin = coin = arcade.Sprite("images/coin_01.png", 0.21)
            coin.center_x = random.randrange(SCREEN_WIDTH)       # 给金币分配随机x坐标
            coin.center_y = random.randrange(SCREEN_HEIGHT)      # 给金币分配随机y坐标
 

            self.coin_list.append(coin)                         # 增加到金币角色列表
            self.all_sprites_list.append(coin)                  # 增加到所有角色列表

        # 设置背景颜色
        arcade.set_background_color(arcade.color.AMAZON)

    def on_draw(self):
        """
        渲染屏幕
        """

        # 在画其它角色之前此代码要先执行
        arcade.start_render()

        # 画所有的角色
        self.all_sprites_list.draw()

        # 放得分情况在屏幕最上面
        output = f"当前得分: {self.score}"
        arcade.draw_text(output, 10, 20, arcade.color.WHITE, 14)

    def on_key_press(self, key, modifiers):
        """
        键盘按下某键时调用此方法
        """
        if key == arcade.key.UP:
            self.player.change_y = MOVEMENT_SPEED
        elif key == arcade.key.DOWN:
            self.player.change_y = -MOVEMENT_SPEED
        elif key == arcade.key.LEFT:
            self.player.change_x = -MOVEMENT_SPEED
        elif key == arcade.key.RIGHT:
            self.player.change_x = MOVEMENT_SPEED

    def on_key_release(self, key, modifiers):
        """
        键盘松开某键时调用此方法
        """
        if key == arcade.key.UP or key == arcade.key.DOWN:
            self.player.change_y = 0
        elif key == arcade.key.LEFT or key == arcade.key.RIGHT:
            self.player.change_x = 0

    def update(self, delta_time):
        """ 移动与游戏逻辑 """

        self.all_sprites_list.update()           # 所有角色更新
        self.all_sprites_list.update_animation() # 所有角色更新动画

        # 玩家角色和金币列表之间的碰撞检测
        hit_list = arcade.check_for_collision_with_list(self.player, self.coin_list)

        # 把碰到的金币删除，并加分
        for coin in hit_list:
            coin.kill()
            self.score += 1


def main():
    """ 主要方法"""
    window = MyGame(SCREEN_WIDTH, SCREEN_HEIGHT, SCREEN_TITLE) # 实例化一个游戏
    window.setup()    
    arcade.run()


if __name__ == "__main__":
    main()