arcade子弹类和角色类例子

"""
子弹类和角色类例子，本程序演示如何新建角色，按鼠标键发射激光射击金币。
"""
import random
import arcade
import os

SPRITE_SCALING_PLAYER = 0.5
SPRITE_SCALING_COIN = 0.2
SPRITE_SCALING_LASER = 0.8
COIN_COUNT = 50

SCREEN_WIDTH = 800
SCREEN_HEIGHT = 600
SCREEN_TITLE = "arcade子弹类和角色类例子，译：李兴球"

BULLET_SPEED = 5


class MyGame(arcade.Window):
    """ Main application class. """

    def __init__(self):
        """ Initializer """
        # Call the parent class initializer
        super().__init__(SCREEN_WIDTH, SCREEN_HEIGHT, SCREEN_TITLE)

        # Set the working directory (where we expect to find files) to the same
        # directory this .py file is in. You can leave this out of your own
        # code, but it is needed to easily run the examples using "python -m"
        # as mentioned at the top of this program.
        file_path = os.path.dirname(os.path.abspath(__file__))
        os.chdir(file_path)

        # 角色列表定义
        self.player_list = None
        self.coin_list = None
        self.bullet_list = None

        # 角色定义 
        self.player_sprite = None
        self.score = 0

        # 不显示鼠标指针
        self.set_mouse_visible(False)

        # 加载音效，声音从from kenney.nl
        self.gun_sound = arcade.sound.load_sound("sounds/laser1.wav")
        self.hit_sound = arcade.sound.load_sound("sounds/phaseJump1.wav")

        arcade.set_background_color(arcade.color.AMAZON)

    def setup(self):

        """ Set up the game and initialize the variables. """

        # 实例化角色列有
        self.player_list = arcade.SpriteList()
        self.coin_list = arcade.SpriteList()
        self.bullet_list = arcade.SpriteList()

        # 设置玩家的得分
        self.score = 0

        # 图像从 kenney.nl中来
        self.player_sprite = arcade.Sprite("images/character.png", SPRITE_SCALING_PLAYER)
        self.player_sprite.center_x = 50
        self.player_sprite.center_y = 70
        self.player_list.append(self.player_sprite)

        # 生成一些金币
        for i in range(COIN_COUNT):

            # 创建金币图像从 kenney.nl中来
            coin = arcade.Sprite("images/coin_01.png", SPRITE_SCALING_COIN)

            # 设定金币坐标
            coin.center_x = random.randrange(SCREEN_WIDTH)
            coin.center_y = random.randrange(120, SCREEN_HEIGHT)

            # 增加到金币列表
            self.coin_list.append(coin)

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

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

        # 画角色之前此命令要调用在先
        arcade.start_render()

        # 画所有角色
        self.coin_list.draw()
        self.bullet_list.draw()
        self.player_list.draw()

        # 画文本
        arcade.draw_text(f"Score: {self.score}", 10, 20, arcade.color.WHITE, 14)

    def on_mouse_motion(self, x, y, dx, dy):
        """
        鼠标移动事件
        """
        self.player_sprite.center_x = x

    def on_mouse_press(self, x, y, button, modifiers):
        """
        按鼠标键时调用此方法
        """
        # 播放射击声
        arcade.sound.play_sound(self.gun_sound)
        # 创建一个子弹
        bullet = arcade.Sprite("images/laserBlue01.png", SPRITE_SCALING_LASER)

        # 图像方向朝右所以要旋转.
        bullet.angle = 90

        # 给子弹垂直速度
        bullet.change_y = BULLET_SPEED

        # 设定坐标到角色这里
        bullet.center_x = self.player_sprite.center_x
        bullet.bottom = self.player_sprite.top

        # 所有子弹加到列表
        self.bullet_list.append(bullet)

    def update(self, delta_time):
        """ 移动与游戏逻辑，一般在这里做碰撞检测"""

        # 所有子弹更新坐标
        self.bullet_list.update()

        # 遍历每颗子弹
        for bullet in self.bullet_list:

            # 检测此颗子弹看看它有没有碰到 金币
            hit_list = arcade.check_for_collision_with_list(bullet, self.coin_list)

            # 如果碰到了就把它删除
            if len(hit_list) > 0:
                bullet.kill()

            # 碰到的每个金币也删除，并加分
            for coin in hit_list:
                coin.kill()
                self.score += 1

                # 射中的声音
                arcade.sound.play_sound(self.hit_sound)

            # 子弹离屏，删除它
            if bullet.bottom > SCREEN_HEIGHT:
                bullet.kill()


def main():
    window = MyGame()
    window.setup()
    arcade.run()


if __name__ == "__main__":
    main()